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Jain R, Kumar A, Sharma A, Sahoo RK, Sharma A, Seth A, Nayak B, Shamim SA, Kaushal S, Kp H, Das CJ, Batra A. Carboplatin in Patients With Metastatic Castration-Resistant Prostate Cancer Harboring Somatic or Germline Homologous Recombination Repair Gene Mutations: Phase II Single-Arm Trial. JMIR Res Protoc 2024; 13:e54086. [PMID: 38453159 DOI: 10.2196/54086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 03/09/2024] Open
Abstract
BACKGROUND Approximately 20%-25% of patients with metastatic castration-resistant prostate cancer (mCRPC) harbor a deleterious germline or somatic mutation in the homologous recombination repair (HRR) pathway genes, which is involved in the repair of double-stranded DNA damage. Half of these mutations are germline, while the remaining are exclusively somatic. While polyadenosine 5'diphosphoribose [poly (ADP-ribose)] polymerase inhibitors, such as olaparib and rucaparib, are effective in this subgroup, their widespread use is limited due to the associated high cost, especially in resource-constrained settings. Notably, platinum agents like carboplatin have exquisite sensitivity to cells with defective DNA repair machinery. Carboplatin, a conventional, inexpensive chemotherapeutic agent, offers a potential alternative treatment in such patients. Several retrospective small case series support this hypothesis. However, there are no prospective clinical trials of carboplatin in patients with mCRPC with HRR mutations. OBJECTIVE The primary objective is to assess the objective response rate of 3 weekly carboplatin treatments in patients with mCRPC harboring deleterious mutations in the HRR pathway genes and previously treated with a taxane or a novel antiandrogen agent. The secondary objectives include progression-free survival, health-related quality of life, and safety profile of carboplatin. METHODS Patients diagnosed with mCRPC harboring HRR pathway mutations previously treated with docetaxel or novel antiandrogen agents (abiraterone, enzalutamide, apalutamide, or darolutamide) or both will be eligible. Genes involved directly or indirectly in the HRR pathway will be tested. In this single-arm phase II study, we will screen approximately 200 patients to enroll 49 patients, and carboplatin (dosing at the area under curve=5) will be administered every 3 weeks until progression or intolerable side effects. The primary end point will be assessed as the proportion of patients with a reduction of serum prostate-specific antigen by more than 50% from enrollment. Secondary outcomes include progression-free survival-soft-tissue disease progression (by response evaluation criteria in solid tumors, version 1.1, and bone lesion progression using Prostate Cancer Clinical Trials Working Group 3 criteria), health-related quality of life during carboplatin treatment using the Functional Assessment of Cancer Therapy-Prostate questionnaire and the European Organisation for Research and Treatment of Cancer questionnaire and safety profile of carboplatin (National Cancer Institute's Common Terminology Criteria for Adverse Events version 5.0). RESULTS The trial started enrollment in September 2023. This trial is ongoing, and 12 patients have been recruited to date. All 49 participants will be enrolled according to plan. CONCLUSIONS This prospective phase II trial represents a critical step toward addressing the therapeutic gap in patients with mCRPC harboring HRR pathway mutations, particularly in demographic regions with limited access to poly (ADP-ribose) polymerase inhibitors. Outcomes from this study will inform clinical practice and guide future phase III randomized trials, ultimately improving patient outcomes globally. TRIAL REGISTRATION Clinical Trials Registry of India CTRI/2023/04/051507; https://ctri.nic.in/Clinicaltrials/pmaindet2.php?EncHid=Njc0NjU=&Enc=&userName=. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/54086.
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Affiliation(s)
- Rishabh Jain
- Department of Medical Oncology, Dr BR Ambedkar Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
| | - Akash Kumar
- Department of Medical Oncology, Dr BR Ambedkar Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
| | - Atul Sharma
- Department of Medical Oncology, Dr BR Ambedkar Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
| | - Ranjit Kumar Sahoo
- Department of Medical Oncology, Dr BR Ambedkar Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
| | - Aparna Sharma
- Department of Medical Oncology, Dr BR Ambedkar Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
| | - Amlesh Seth
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Brusabhanu Nayak
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Shamim A Shamim
- Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Seema Kaushal
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Haresh Kp
- Department of Radiation Oncology, Dr BR Ambedkar Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Atul Batra
- Department of Medical Oncology, New Delhi, India
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Das CJ, Malagi AV, Sharma R, Mehndiratta A, Kumar V, Khan MA, Seth A, Kaushal S, Nayak B, Kumar R, Gupta AK. Intravoxel incoherent motion and diffusion kurtosis imaging and their machine-learning-based texture analysis for detection and assessment of prostate cancer severity at 3 T. NMR Biomed 2024:e5144. [PMID: 38556777 DOI: 10.1002/nbm.5144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 02/01/2024] [Accepted: 02/20/2024] [Indexed: 04/02/2024]
Abstract
OBJECTIVES To evaluate the role of combined intravoxel incoherent motion and diffusion kurtosis imaging (IVIM-DKI) and their machine-learning-based texture analysis for the detection and assessment of severity in prostate cancer (PCa). MATERIALS AND METHODS Eighty-eight patients underwent MRI on a 3 T scanner after giving informed consent. IVIM-DKI data were acquired using 13 b values (0-2000 s/mm2) and analyzed using the IVIM-DKI model with the total variation (TV) method. PCa patients were categorized into two groups: clinically insignificant prostate cancer (CISPCa) (Gleason grade ≤ 6) and clinically significant prostate cancer (CSPCa) (Gleason grade ≥ 7). One-way analysis-of-variance, t test, and receiver operating characteristic analysis was performed to measure the discriminative ability to detect PCa using IVIM-DKI parameters. A chi-square test was used to select important texture features of apparent diffusion coefficient (ADC) and IVIM-DKI parameters. These selected texture features were used in an artificial neural network for PCa detection. RESULTS ADC and diffusion coefficient (D) were significantly lower (p < 0.001), and kurtosis (k) was significantly higher (p < 0.001), in PCa as compared with benign prostatic hyperplasia (BPH) and normal peripheral zone (PZ). ADC, D, and k showed high areas under the curves (AUCs) of 0.92, 0.89, and 0.88, respectively, in PCa detection. ADC and D were significantly lower (p < 0.05) as compared with CISPCa versus CSPCa. D for detecting CSPCa was high, with an AUC of 0.63. A negative correlation of ADC and D with GS (ADC, ρ = -0.33; D, ρ = -0.35, p < 0.05) and a positive correlation of k with GS (ρ = 0.22, p < 0.05) were observed. Combined IVIM-DKI texture showed high AUC of 0.83 for classification of PCa, BPH, and normal PZ. CONCLUSION D, f, and k computed using the IVIM-DKI model with the TV method were able to differentiate PCa from BPH and normal PZ. Texture features of combined IVIM-DKI parameters showed high accuracy and AUC in PCa detection.
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Affiliation(s)
- Chandan J Das
- Department of Radio-Diagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Archana Vadiraj Malagi
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Raju Sharma
- Department of Radio-Diagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Mehndiratta
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Virendra Kumar
- Department of Nuclear Magnetic Resonance, All India Institute of Medical Sciences, New Delhi, India
| | - Maroof A Khan
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - Amlesh Seth
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Seema Kaushal
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Baibaswata Nayak
- Department of Gastroenterology (Molecular Biology Division), All India Institute of Medical Sciences, New Delhi, India
| | - Rakesh Kumar
- Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Arun Kumar Gupta
- Department of Radio-Diagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
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Aggarwal P, Krishna Kumar RG, Das CJ, Kubihal V, Subudhi TK, Khan MA, Kumar R. Role of non-contrast CT component of prostate-specific membrane antigen PET/CT scan in the detection of peripheral zone prostate cancer. Br J Radiol 2024; 97:195-200. [PMID: 38263835 PMCID: PMC11027233 DOI: 10.1093/bjr/tqad009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/04/2023] [Accepted: 10/19/2023] [Indexed: 01/25/2024] Open
Abstract
OBJECTIVE The aim of this study was to look for feasibility of non-contrast CT (NCCT) in detecting peripheral zone prostate cancer (PCa). METHODS A retrospective analysis included 50 biopsy-proven PCa patients between April 2019 and March 2022 who underwent staging whole body prostate-specific membrane antigen (PSMA)/CT prior to treatment. The control subjects were 50 randomly selected adult male patients who underwent PET/CT for non-prostate malignancy during the same time period. Two readers independently calculated the Hounsfield unit (HU) of normal peripheral zone, central zone, and corresponding PSMA avid focus in cases. RESULTS No significant difference was seen in the mean HU value of normal peripheral zone between cases and controls. Significant difference in the mean HU was seen between the PSMA avid focus in cases (40.1 ± 6.2) and normal peripheral zone of cases (28.2 ± 7.0) and controls (27.7 ± 5.8). No significant difference was found between the mean HU values of high-grade PCa and non-high-grade PCa. Receiver operating characteristic (ROC) curve analysis revealed a mean HU cut-off of ≥35 for detecting PCa with a sensitivity and specificity of 86% and 90%, respectively, between cases and controls (AUC 0.88). CONCLUSION Detection of clinically significant PCa is possible on routinely performed NCCT scans. Radiologists should routinely look for and convey these findings to facilitate further work-up and early detection of PCa. ADVANCES IN KNOWLEDGE Our study adds to the knowledge that NCCT scans performed for unrelated indications can serve as a screening tool for clinically significant PCa.
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Affiliation(s)
- Piyush Aggarwal
- Department of Radio-Diagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - R G Krishna Kumar
- Department of Radio-Diagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Chandan J Das
- Department of Radio-Diagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Vijay Kubihal
- Department of Radio-Diagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - T Kishan Subudhi
- Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi 110029, India
| | - M A Khan
- Department of Bio-statistics, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Rakesh Kumar
- Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi 110029, India
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Das CJ, Selvaraju A, Aggarwal P, Chumber S. Combined endovascular and percutaneous approach to the management of spontaneous splenic arteriovenous fistula. BMJ Case Rep 2024; 17:e255924. [PMID: 38262721 PMCID: PMC10826506 DOI: 10.1136/bcr-2023-255924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024] Open
Abstract
A splenic arteriovenous fistula (AVF) is an uncommon splenic vascular disease which can be congenital or acquired. A 40yr old woman, without any history of chronic liver disease, presented with non-specific pain abdomen, underwent contrast-enhanced CT and was diagnosed to have a splenic AVF with multiple intervening venous aneurysms and early filling of the portal vein. The vascular abnormality was successfully treated with a combined percutaneous glue embolisation and endovascular balloon-assisted coil embolisation. Neither recurrence nor other complications were observed in the patient during the follow-up after 6 months.
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Affiliation(s)
- Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | - Anup Selvaraju
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | - Piyush Aggarwal
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | - Sunil Chumber
- Department of Surgical Disciplines, All India Institute of Medical Sciences, New Delhi, Delhi, India
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Das CJ, Agarwal K, Sharma S, Seth A. Role of Contrast-Enhanced Ultrasound in Evaluation of Cystic Renal Mass. J Ultrasound Med 2023; 42:2873-2881. [PMID: 37676901 DOI: 10.1002/jum.16328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 08/20/2023] [Accepted: 08/21/2023] [Indexed: 09/09/2023]
Abstract
OBJECTIVES Contrast-enhanced ultrasound (CEUS) allows excellent delineation of perfusion in septa and nodules without exposure to ionizing radiation or nephrotoxic contrast media. The aim of our study was to evaluate the role of CEUS for the assessment of cystic renal masses and compare its diagnostic performance with that of CECT. METHODS Exactly 40 patients diagnosed to have cystic renal masses on CECT scan were prospectively evaluated with CEUS and were assigned a Bosniak class. Based on results of final histopathology and clinical follow-up, internal validity of both CEUS and CECT was evaluated, including agreement between these two modalities. RESULTS Out of the 40 patients (mean size 3.1 ± 2.5 cm), 23 patients had benign lesions and 17 patients had malignant lesions. For CEUS, the sensitivity and negative predictive value was 100%, the specificity and positive predictive value was 73.9%. For CECT, the sensitivity and negative predictive value were 88.2 and 83.3%, respectively, whereas the specificity and positive predictive value was 87 and 90.9%, respectively. Both imaging modalities had similar accuracy with fair to good agreement with the final diagnosis (Κ = 0.71 and 0.75 for CEUS and CECT, respectively). Concordance between CEUS and CECT was seen in 29 patients (72.5%) with fair agreement between the two modalities (K = 0.66). CONCLUSION CEUS has comparable accuracy with CECT and could be used as screening modality to rule out the presence of complex cystic renal masses without exposure of nephrotoxic contrast media and ionizing radiation.
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Affiliation(s)
- Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Keshav Agarwal
- Department of Urology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Sanjay Sharma
- Department of Radiodiagnosis, RP Centre, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Amlesh Seth
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
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Sasi A, Ahuja V, Das CJ, Arora U, Garg P, Razik A, Kedia S, Das P, Jadon RS, Soneja M, Wig N. Assessment of CT perfusion indices of the clinicoradiological response to anti-tubercular therapy in patients with intestinal tuberculosis. Clin Radiol 2023; 78:e1081-e1086. [PMID: 37839945 DOI: 10.1016/j.crad.2023.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 09/02/2023] [Accepted: 09/05/2023] [Indexed: 10/17/2023]
Abstract
AIM To explore the possibility of using a novel technique, CT perfusion imaging, to monitor the response to anti-tubercular therapy (ATT) in patients with intestinal tuberculosis. MATERIALS AND METHODS A prospective observational study was performed in adults with treatment naive-intestinal tuberculosis. Clinical, endoscopic, and conventional radiological findings of patients were compared at baseline and post-ATT. CT perfusion imaging was performed with recording of six perfusion parameters (blood flow, blood volume, mean transit time, time to peak, maximum peak intensity, and permeability/blood flow extraction). RESULTS Twenty-two patients (13 women, 59%) with a median age of 25 years were recruited. The terminal ileum and ileocaecal junction were the most frequent sites of involvement (59%), with multiple segments of the intestine being involved in 16 patients (73%). Median duration of ATT was 6 months (range 6-10 months). Complete clinical response was observed in 22/22 (100%) patients, endoscopic response in 12/12 (100%) patients, and radiological response in 10/13 (76%) patients. There was a significant decrease in mean blood flow, blood volume, maximum peak intensity, and an increase in mean transit time and time to peak on follow-up CT perfusion imaging performed after 6 months of ATT. CONCLUSION Significant alterations in CT perfusion parameters were demonstrated following treatment, consistent with a decline in inflammation and vascularity. CT perfusion imaging of the bowel is a novel means to assess the radiological response to ATT in intestinal tuberculosis, although at the cost of a higher dose of radiation exposure.
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Affiliation(s)
- A Sasi
- Department of Medicine, AIIMS, Delhi, India
| | - V Ahuja
- Department of Gastroenterology and Human Nutrition, AIIMS, Delhi, India
| | - C J Das
- Department of Radiodiagnosis, AIIMS, Delhi, India
| | - U Arora
- Department of Medicine, AIIMS, Delhi, India
| | - P Garg
- Department of Medicine, AIIMS, Delhi, India
| | - A Razik
- Department of Radiodiagnosis, AIIMS, Delhi, India
| | - S Kedia
- Department of Gastroenterology and Human Nutrition, AIIMS, Delhi, India
| | - P Das
- Department of Pathology, AIIMS, Delhi, India
| | | | - M Soneja
- Department of Medicine, AIIMS, Delhi, India.
| | - N Wig
- Department of Medicine, AIIMS, Delhi, India
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Das CJ, Rednam N, Vora Z, Aggarwal A, Chandrashekhara SH, Kundra V. Abdominal visceral tuberculosis: a malignancy mimic. Abdom Radiol (NY) 2023; 48:2705-2715. [PMID: 37204509 PMCID: PMC10197054 DOI: 10.1007/s00261-023-03939-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/20/2023]
Abstract
The purpose is to discuss abdominal tuberculosis mimicking malignancy involving the abdominal viscera. TB of the abdominal viscera is common, especially in countries where tuberculosis is endemic and in pockets of non-endemic countries. Diagnosis is challenging as clinical presentations are often non-specific. Tissue sampling may be necessary for definitive diagnosis. Awareness of the early and late disease imaging appearances of abdominal tuberculosis involving the viscera that can mimic malignancy can aid detecting TB, providing a differential diagnosis, assessing extent of spread, guiding biopsy, and evaluating response.
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Affiliation(s)
- Chandan J. Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029 India
| | - Nikita Rednam
- Department of Diagnostic Radiology and Nuclear Medicine, Program in Experimental Therapeutics, University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, 22 South Greene Street, Baltimore, MD 21201 USA
| | - Zainab Vora
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029 India
| | - Ankita Aggarwal
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029 India
| | - S. H. Chandrashekhara
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029 India
| | - Vikas Kundra
- Department of Diagnostic Radiology and Nuclear Medicine, Program in Experimental Therapeutics, University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, 22 South Greene Street, Baltimore, MD 21201 USA
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Dasgupta R, Das CJ, Gupta A. A rare diagnosis of renal replacement lipomatosis. Indian J Urol 2023; 39:165-166. [PMID: 37304976 PMCID: PMC10249532 DOI: 10.4103/iju.iju_24_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/19/2023] [Accepted: 03/09/2023] [Indexed: 06/13/2023] Open
Abstract
Renal replacement lipomatosis (RRL) is a rare, benign entity characterized by marked fat proliferation within the renal sinus and perinephric space. We present images of a patient with RRL.
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Affiliation(s)
- Rajnandini Dasgupta
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Gupta
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
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Naik S, Pappu A, Sarathkumar M, Ramachandran R, Arora M, Trikha A, Singh PM, Anand RK, Das CJ, Rewari V. Determination of the optimal length of insertion for central venous catheterization via axillary vein cannulation using preoperative chest X-ray- A prospective feasibility study. J Anaesthesiol Clin Pharmacol 2023; 39:215-219. [PMID: 37564859 PMCID: PMC10410044 DOI: 10.4103/joacp.joacp_223_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/08/2021] [Accepted: 07/19/2021] [Indexed: 08/12/2023] Open
Abstract
Background and Aims Ensuring safe central venous catheter tip placement is important. Multiple techniques are available to estimate the length of catheter insertion for subclavian and internal jugular approaches. However, the methods to determine the length of insertion for the axillary route have not been validated. The purpose of this feasibility study was to evaluate a simple method for the calculation of catheter length to be inserted and assess whether it accurately predicts the correct tip placement. Material and Methods A total of 102 patients requiring preoperative central venous cannulation were evaluated, out of which 60 had successful axillary vein (AxV) cannulation. The length of insertion was calculated using the formula: (2/3* A + B) +Y (A: Clavicular length on chest radiograph [CXR], B: Vertical distance between the sternal head and carina on CXR, Y: Perpendicular distance from the skin to the AxV on ultrasound). A postoperative CXR was used to assess the accurate tip placement (2 cm above the carina to 0.5 cm below it). The primary outcome of the study was the rate of successful placement of the central venous catheter (CVC) in terms of the correct position of the tip of the catheter when the length of the catheter inserted was predicted by the formula described previously. Results Optimal placement was observed in 83.33% of the cases. A higher rate of accuracy was seen in the females (P value = 0.03) and shorter patients (P value = 0.01). A Bland-Altman plot depicted a high degree of agreement. Conclusion Use of the formula using a CXR and ultrasound allowed P successful placement of the CVC tip at the desired location in 83.33% of the cases.
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Affiliation(s)
- Srikanth Naik
- Department of Anaesthesiology, Pain Medicine and Critical Care, New Delhi, India
| | - Ameya Pappu
- Department of Anaesthesiology, Pain Medicine and Critical Care, New Delhi, India
| | - M.S Sarathkumar
- Department of Anaesthesiology, Pain Medicine and Critical Care, New Delhi, India
| | - Rashmi Ramachandran
- Department of Anaesthesiology, Pain Medicine and Critical Care, New Delhi, India
| | - M.K. Arora
- Department of Anaesthesia, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Anjan Trikha
- Department of Anaesthesiology, Pain Medicine and Critical Care, New Delhi, India
| | - Preet M. Singh
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, USA
| | - Rahul Kumar Anand
- Department of Anaesthesiology, Pain Medicine and Critical Care, New Delhi, India
| | - Chandan J. Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Vimi Rewari
- Department of Anaesthesiology, Pain Medicine and Critical Care, New Delhi, India
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Gulati S, Chumber S, Puri G, Spalkit S, Damle NA, Das CJ. Multi-modality parathyroid imaging: A shifting paradigm. World J Radiol 2023; 15:69-82. [PMID: 37035829 PMCID: PMC10080580 DOI: 10.4329/wjr.v15.i3.69] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/20/2023] [Accepted: 03/01/2023] [Indexed: 03/27/2023] Open
Abstract
The goal of parathyroid imaging in hyperparathyroidism is not diagnosis, rather it is the localization of the cause of hyperparathyroidism for planning the best therapeutic approach. Hence, the role of imaging to accurately and precisely localize the abnormal parathyroid tissue is more important than ever to facilitate minimally invasive parathyroidectomy over bilateral neck exploration. The common causes include solitary parathyroid adenoma, multiple parathyroid adenomas, parathyroid hyperplasia and parathyroid carcinoma. It is highly imperative for the radiologist to be cautious of the mimics of parathyroid lesions like thyroid nodules and lymph nodes and be able to differentiate them on imaging. The various imaging modalities available include high resolution ultrasound of the neck, nuclear imaging studies, four-dimensional computed tomography (4D CT) and magnetic resonance imaging. Contrast enhanced ultrasound is a novel technique which has been recently added to the armamentarium to differentiate between parathyroid adenomas and its mimics. Through this review article we wish to review the imaging features of parathyroid lesions on various imaging modalities and present an algorithm to guide their radiological differentiation from mimics.
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Affiliation(s)
- Shrea Gulati
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi 110029, Delhi, India
| | - Sunil Chumber
- Department of Surgical Disciplines, All India Institute of Medical Sciences, New Delhi 110029, Delhi, India
| | - Gopal Puri
- Department of Surgical Disciplines, All India Institute of Medical Sciences, New Delhi 110029, Delhi, India
| | - Stanzin Spalkit
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi 110029, Delhi, India
| | - N A Damle
- Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi 110029, Delhi, India
| | - CJ Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi 110029, Delhi, India
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Pattereth N, Chaliyadan S, Mathew R, Kumar S, Das CJ, Aggarwal P, Jamshed N. The Role of Triple Rule-out CT in an Indian Emergency Setting. Indian J Crit Care Med 2023; 27:190-194. [PMID: 36960114 PMCID: PMC10028717 DOI: 10.5005/jp-journals-10071-24423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 02/15/2023] [Indexed: 03/05/2023] Open
Abstract
Background Emergency physicians are acutely aware of the consequences of missing fatal diagnoses for acute non-traumatic chest pain and subjecting patients to over-testing. In the large arsenal of tests that are available to us, a triple rule-out computed tomography (TRO-CT) Angiography is often less pursued, due to concerns about their efficacy and safety or because of nescience. We aim to find the yield of the test in an Indian emergency setting and impart some knowledge about it along the way. Materials and methods Twenty-six patients who presented to the emergency department of our institute with acute chest pain, with non-specific electrocardiogram (ECG) findings and negative serial troponin I, underwent TRO-CT. HEART scores of all patients, calculated at their presentation, were correlated with TRO-CT findings. Results Triple rule-out computed tomography angiography was positive in 5 patients (20%), of which 4 cases (16%) were diagnosed to have significant coronary artery disease and one had an acute pulmonary embolism. All 4 patients who had significant coronary artery disease (CAD) diagnosed by TRO-CT had a HEART score of intermediate risk. The mean effective radiation dose of the entire TRO study was 19.024 ± 3.319 mSv (range = 13.89-25.95 mSv). Conclusion Triple rule-out CT angiography is a useful tool in the evaluation of patients presenting with acute chest pain in the emergency and can be an important adjunct in ruling out significant CAD in intermediate-risk patients. Emergency physicians and young residents need to know about this tool in their armamentarium to tackle doubtful cases. How to cite this article Pattereth N, Chaliyadan S, Mathew R, Kumar S, Das CJ, Aggarwal P. et al. The Role of Triple Rule-out CT in an Indian Emergency Setting. Indian J Crit Care Med 2023;27(3):190-194.
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Affiliation(s)
- Navaneeth Pattereth
- Department of Emergency Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Shafneed Chaliyadan
- Department of Surgery, Jan Swasthya Sahyog, Bilaspur, Chhattisgarh, India
- Shafneed Chaliyadan, Department of Surgery, Jan Swasthya Sahyog, Bilaspur, Chhattisgarh, India, Phone: +91 9560819324, e-mail:
| | - Roshan Mathew
- Department of Emergency Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Sanjeev Kumar
- Department of Cardio-radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Praveen Aggarwal
- Department of Emergency Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Nayer Jamshed
- Department of Emergency Medicine, All India Institute of Medical Sciences, New Delhi, India
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Das CJ, Aggarwal A, Singh P, Nayak B, Yadav T, Lal A, Gorsi U, Batra A, Shamim SA, Duara BK, Arulraj K, Kaushal S, Seth A. Imaging Recommendations for Diagnosis, Staging, and Management of Renal Tumors. Indian J Med Paediatr Oncol 2023. [DOI: 10.1055/s-0042-1759718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
AbstractRenal cell carcinomas accounts for 2% of all the cancers globally. Most of the renal tumors are detected incidentally. Ultrasound remains the main screening modality to evaluate the renal masses. A multi -phase contrast enhanced computer tomography is must for characterizing the renal lesions. Imaging plays an important role in staging, treatment planning and follow up of renal cancers. In this review , we discuss the imaging guidelines for the management of renal tumors.
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Affiliation(s)
- Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, AIIMS, New Delhi, India
| | - Ankita Aggarwal
- Department of Radiodiagnosis, VMMC and SJH, New Delhi, India
| | | | - B Nayak
- Department of Urology, AIIMS, New Delhi, India
| | - Taruna Yadav
- Department of Radiodiagnosis, Jodhpur, Rajasthan, India
| | - Anupam Lal
- Department of Radiodiagnosis, PGI, Chandigarh, India
| | - Ujjwal Gorsi
- Department of Radiodiagnosis, PGI, Chandigarh, India
| | - Atul Batra
- Department of Medical Oncology, AIIMS, IRCH, New Delhi, India
| | | | | | | | | | - Amlesh Seth
- Department of Urology, AIIMS, New Delhi, India
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13
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Bhalla D, Hemachandran N, Wani GM, Agarwal SK, Das CJ. Postdialysis catheter insertion femoral arteriovenous fistula: A novel approach to endovascular management. Semin Dial 2023; 36:67-69. [PMID: 36126965 DOI: 10.1111/sdi.13124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 06/30/2022] [Accepted: 09/01/2022] [Indexed: 02/01/2023]
Affiliation(s)
- Deeksha Bhalla
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Naren Hemachandran
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Gh Mohammad Wani
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Sanjay K Agarwal
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
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Singh D, Das CJ, Kumar V, Singh A, Mehndiratta A. Quantification of prostate tumour diameter and volume from MR images using 3D ellipsoid model and its impact on PI-RADS v2.1 assessment. Sci Rep 2022; 12:21501. [PMID: 36513800 PMCID: PMC9748032 DOI: 10.1038/s41598-022-26065-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Maximum diameter and volume of the tumour provide important clinical information and are decision-making parameters for patients suspected with prostate cancer (PCa). The objectives of this study were to develop an automated method for 3D tumour measurement and compare it with the radiologist's manual assessment, as well as to investigate the impact of 3D tumour measurement on Prostate Imaging-Reporting and Data System version-2.1 (PI-RADS v2.1) scoring of prostate cancer. Tumour maximum diameter and volume were calculated using automated ellipsoid-fit method. For all PI-RADS scores, mean ± standard deviation range of tumour maximum diameter and volume measured using ellipsoid-fit method were 1.36 ± 0.28 to 1.97 ± 0.67 cm and 0.49 ± 0.31 to 1.05 ± 0.78 cc and manual assessment were in range of 0.73 ± 0.12 to 1.14 ± 0.25 cm and 0.36 ± 0.21 to 0.93 ± 0.39 cc, respectively. Ellipsoid-fit method showed significantly (p < 0.05) higher values for maximum diameter and volume than manual assessment. 3D measurement of tumour using ellipsoid-fit method was found to have higher maximum diameter and volume values (in 40-61% patients) compared to conventional assessment by radiologist, which may have an impact on PI-RADS v2.1 scoring system.
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Affiliation(s)
- Dharmesh Singh
- grid.417967.a0000 0004 0558 8755Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Chandan J. Das
- grid.413618.90000 0004 1767 6103Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Virendra Kumar
- grid.413618.90000 0004 1767 6103Department of NMR, All India Institute of Medical Sciences, New Delhi, India
| | - Anup Singh
- grid.417967.a0000 0004 0558 8755Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India ,grid.413618.90000 0004 1767 6103Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Mehndiratta
- grid.417967.a0000 0004 0558 8755Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India ,grid.413618.90000 0004 1767 6103Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India ,grid.417967.a0000 0004 0558 8755Centre for Biomedical Engineering, IIT Delhi Hauz-Khas, Room No-298, Block III, New Delhi, 110016 India
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15
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Kaur G, Kaur T, Das CJ. Morrison's Pouch: Anatomy and Radiological Appearance of Pathological Processes. Indian J Radiol Imaging 2022; 33:80-88. [PMID: 36855710 PMCID: PMC9968550 DOI: 10.1055/s-0042-1758874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Morrison's pouch is the intraperitoneal space in the supramesocolic compartment located between the right liver lobe and right kidney. Pathological conditions that can involve this peritoneal space include fluid collections, infectious or inflammatory processes, and neoplasms. Frequent involvement by disease entities can be attributed to its dependent location, communication with the inframesocolic compartment, close proximity to the adjacent organs and peritoneal fluid dynamics. Knowledge of the appearance of pathological entities on various imaging modalities helps the radiologist in making the correct diagnosis.
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Affiliation(s)
- Gurkawal Kaur
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Tejinder Kaur
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J. Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India,Address for correspondence Chandan J. Das, MD, DNB, MAMS, FICR, FRCP (Edin) Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical SciencesAnsari Nagar, New Delhi 110029India
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16
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Singh D, Kumar V, Das CJ, Singh A, Mehndiratta A. Machine learning-based analysis of a semi-automated PI-RADS v2.1 scoring for prostate cancer. Front Oncol 2022; 12:961985. [PMID: 36505875 PMCID: PMC9730331 DOI: 10.3389/fonc.2022.961985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 10/27/2022] [Indexed: 11/27/2022] Open
Abstract
Background Prostate Imaging-Reporting and Data System version 2.1 (PI-RADS v2.1) was developed to standardize the interpretation of multiparametric MRI (mpMRI) for prostate cancer (PCa) detection. However, a significant inter-reader variability among radiologists has been found in the PI-RADS assessment. The purpose of this study was to evaluate the diagnostic performance of an in-house developed semi-automated model for PI-RADS v2.1 scoring using machine learning methods. Methods The study cohort included an MRI dataset of 59 patients (PI-RADS v2.1 score 2 = 18, score 3 = 10, score 4 = 16, and score 5 = 15). The proposed semi-automated model involved prostate gland and zonal segmentation, 3D co-registration, lesion region of interest marking, and lesion measurement. PI-RADS v2.1 scores were assessed based on lesion measurements and compared with the radiologist PI-RADS assessment. Machine learning methods were used to evaluate the diagnostic accuracy of the proposed model by classification of PI-RADS v2.1 scores. Results The semi-automated PI-RADS assessment based on the proposed model correctly classified 50 out of 59 patients and showed a significant correlation (r = 0.94, p < 0.05) with the radiologist assessment. The proposed model achieved an accuracy of 88.00% ± 0.98% and an area under the receiver-operating characteristic curve (AUC) of 0.94 for score 2 vs. score 3 vs. score 4 vs. score 5 classification and accuracy of 93.20 ± 2.10% and AUC of 0.99 for low score vs. high score classification using fivefold cross-validation. Conclusion The proposed semi-automated PI-RADS v2.1 assessment system could minimize the inter-reader variability among radiologists and improve the objectivity of scoring.
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Affiliation(s)
- Dharmesh Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Virendra Kumar
- Department of Nuclear Magnetic Resonance (NMR), All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J. Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Anup Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India,Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Mehndiratta
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India,Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India,*Correspondence: Amit Mehndiratta,
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Bharati A, Rani Mandal S, Gupta AK, Seth A, Sharma R, Bhalla AS, Das CJ, Chatterjee S, Kumar P. Non-Invasive characterisation of renal stones using dual energy CT: A method to differentiate calcium stones. Phys Med 2022; 101:158-164. [PMID: 36007404 DOI: 10.1016/j.ejmp.2022.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/22/2022] [Accepted: 08/17/2022] [Indexed: 10/15/2022] Open
Abstract
BACKGROUND Non-invasive DECT based characterization of renal stones using their effective atomic number (Zeff) and the electron density (ρe) in patients. AIM This paper aims to develop a method for in-vivo characterization of renal stone. Differentiation of renal stones in-vivo especially sub types of calcium stones have very important advantage for better judgement of treatment modality. MATERIALS AND METHODS 50 extracted renal stones were scanned ex-vivo using dual energy CT scanner. A method was developed to characterize these renal stones using effective atomic number and electron density obtained from dual energy CT data. The method and formulation developed in ex-vivo experiments was applied in in-vivo study of 50 randomly selected patients of renal stones who underwent dual energy CT scan. RESULTS The developed method was able to characterize Calcium Oxalate Monohydrate (COM) and the combination of COM and Calcium Oxalate Dihydrate (COD) stones non-invasively in patients with a sensitivity of 81% and 83%respectively. The method was also capable of differentiating Uric, Cystine and mixed stones with the sensitivity of 100, 100 and 85.71% respectively. CONCLUSION The developed dual energy CT based method was capable of differentiating sub types of calcium stones which is not differentiable on single energy or dual energy CT images.
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Affiliation(s)
- Avinav Bharati
- Department of Radiation Oncology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Prades 226010, India
| | | | | | - Amlesh Seth
- Department of Urology, AIIMS, New Delhi 110029, India
| | - Raju Sharma
- Department of Radiodiagnosis, AIIMS, New Delhi 110029, India
| | - Ashu S Bhalla
- Department of Radiodiagnosis, AIIMS, New Delhi 110029, India
| | - Chandan J Das
- Department of Radiodiagnosis, AIIMS, New Delhi 110029, India
| | - Sabyasachi Chatterjee
- BGVS, Chemical Engineering Building (Old), Institute of Science, Bengaluru, Karnataka 560012,India
| | - Pratik Kumar
- Medical Physics Unit, IRCH, AIIMS, New Delhi 110029, India.
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18
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Abstract
Multiphasic multidetector computed tomography (CT) forms the mainstay for the characterization of renal masses whereas magnetic resonance imaging (MRI) acts as a problem-solving tool in some cases. However, a few of the renal masses remain indeterminate even after evaluation by conventional imaging methods. To overcome the deficiency in current imaging techniques, advanced imaging methods have been devised and are being tested. This review will cover the role of contrast-enhanced ultrasonography, shear wave elastography, dual-energy CT, perfusion CT, MR perfusion, diffusion-weighted MRI, blood oxygen level-dependent MRI, MR spectroscopy, positron emission tomography (PET)/prostate-specific membrane antigen-PET in the characterization of renal masses.
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Affiliation(s)
- Ankita Aggarwal
- Department of Radiology, Vardhman Mahavir Medical College& Safdarjung Hospital, Delhi 110029, India
| | - Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, Delhi 110029, India
| | - Sanjay Sharma
- Department of Radiology (RPC), All India Institute of Medical Sciences, New Delhi 110029, India
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Kubihal V, Kundra V, Lanka V, Sharma S, Das P, Nayyar R, Das CJ. Prospective evaluation of PI-RADS v2 and quantitative MRI for clinically significant prostate cancer detection in Indian men – East meets West. Arab J Urol 2022; 20:126-136. [PMID: 35935908 PMCID: PMC9354636 DOI: 10.1080/2090598x.2022.2072141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Affiliation(s)
- Vijay Kubihal
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Vikas Kundra
- Department of diagnostic radiology, MD Anderson Cancer Center, Houston, Texas, USA
| | - Vivek Lanka
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Sanjay Sharma
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Prasenjit Das
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Rishi Nayyar
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
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20
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Verma S, Arora S, Sahoo RK, Singh P, Nayak B, Haresh KP, Das CJ, Shamim SA, Kaushal S, Batra A. Differential effect of body mass index (BMI) on outcomes of patients treated with docetaxel in prostate cancer - An exploratory analysis. Cancer Treat Res Commun 2022; 31:100520. [PMID: 35091358 DOI: 10.1016/j.ctarc.2022.100520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/11/2022] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVE There are contradictory data on differential effect of docetaxel based on BMI in patients with breast and prostate cancer. We performed an exploratory analysis to determine if the benefit of docetaxel in patients with metastatic castration-resistant prostate cancer (mCRPC) is modified by BMI. METHODS We performed a post hoc analysis of the data retrieved from the ENTHUSE M1C study. BMI (kg/m2) was categorized as: 18.5 to <25 as lean; 25 to <30 as overweight; and ≥30 as obese. Cox regression models were constructed to determine the impact of BMI on progression-free survival (PFS) and overall survival (OS). RESULTS A total of 466 patients were eligible for the current analysis. The median PFS was 7.3, 7.7 and 8.4 months (hazard ratio [HR], 0.92; 95% confidence interval [CI], 0.81 to 1.06; P = 0.261) in lean, overweight and obese patients. The median OS was 16.6, 20.1 and 21.4 months (HR, 0.75; 95% CI, 0.63 to 0.89; P = 0.002) for lean, overweight and obese patients. After adjusting for baseline and tumor characteristics, there was no association of BMI with PFS (overweight, HR, 0.89; 95% CI, 0.71 to 1.13; P = 0.353; obese, HR, 0.86; 95% CI, 0.66 to 1.13; P = 0.277) while overweight (HR, 0.68; 95% CI, 0.51 to 0.89; P = 0.006) and obese (HR, 0.59; 95% CI, 0.41 to 0.83; P = 0.003) patients had significantly better OS compared with lean patients. CONCLUSIONS There was no effect of BMI on PFS in patients with mCRPC receiving docetaxel. Interestingly, overweight and obese patients had a longer OS compared with lean patients, which is in contradiction to a recent study in breast cancer; and warrants further investigation.
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Affiliation(s)
- Saurav Verma
- Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Shalabh Arora
- Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Ranjit Kumar Sahoo
- Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Prabhjot Singh
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Brusabhanu Nayak
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - K P Haresh
- Department of Radiation Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Shamim A Shamim
- Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Seema Kaushal
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Atul Batra
- Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi, India.
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Nayak B, Lal G, Kumar S, Das CJ, Saraya A, Shalimar. Host Response to SARS-CoV2 and Emerging Variants in Pre-Existing Liver and Gastrointestinal Diseases. Front Cell Infect Microbiol 2021; 11:753249. [PMID: 34760721 PMCID: PMC8573081 DOI: 10.3389/fcimb.2021.753249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/04/2021] [Indexed: 01/08/2023] Open
Abstract
Background Novel coronavirus SARS-CoV2 is evolving continuously with emergence of several variants of increasing transmission capabilities and pandemic potential. Generation of variants occurs through accumulation of mutations due to the RNA nature of viral genome, which is further enhanced by variable selection pressures of this ongoing pandemic. COVID-19 presentations of SARS-CoV2 are mainly pulmonary manifestations with or without mild gastrointestinal (GI) and hepatic symptoms. However, the virus has evolved beyond pulmonary manifestations to multisystem disorder due to systemic inflammation and cytokine storm. Definitive cause of acute or late onset of inflammation, infection in various organs, and host response to emerging variants lacks clarity and needs elucidation. Several studies have reported underlying diseases including diabetes, hypertension, obesity, cardio- and cerebrovascular disorders, and immunocompromised conditions as significant risk factors for severe form of COVID-19. Pre-existing liver and GI diseases are also highly predominant in the population, which can alter COVID-19 outcome due to altered immune status and host response. We aim to review the emerging variants of SARS-CoV2 and host response in patients with pre-existing liver and GI diseases. Methods In this review, we have elucidated the emergence and characteristic features of new SARS-CoV2 variants, mechanisms of infection and host immune response, GI and hepatic manifestation with radiologic features of COVID-19, and outcomes in pre-existing liver and GI diseases. Key Findings Emerging variants of concern (VOC) have shown increased transmissibility and virulence with severe COVID-19 presentation and mortality. There is a drastic swift of variants from the first wave to the next wave of infections with predominated major VOC including alpha (B.1.1.7, UK), beta (B.1.351, South Africa), gamma (B.1.1.28.1, Brazil), and delta (B1.1.617, India) variants. The mutations in the spike protein of VOC are implicated for increased receptor binding (N501Y, P681R) and immune escape (L452R, E484K/Q, T478K/R) to host response. Pre-existing liver and GI diseases not only have altered tissue expression and distribution of viral entry ACE2 receptor but also host protease TMPRSS2, which is required for both spike protein binding and cleavage to initiate infection. Altered immune status due to pre-existing conditions results in delayed virus clearance or prolonged viremia. Even though GI and hepatic manifestations of SARS-CoV2 are less severe, the detection of virus in patient’s stool indicates GI tropism, replication, and shedding from the GI tract. COVID-19-induced liver injury, acute hepatic decompensation, and incidences of acute-on-chronic liver failure may change the disease outcomes. Conclusions The changes in the spike protein of emerging variants, immunomodulation by viral proteins, and altered expression of host viral entry receptor in pre-existing diseases are the key determinants of host response to SARS-CoV2 and its disease outcome.
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Affiliation(s)
- Baibaswata Nayak
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Geetanjali Lal
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Sonu Kumar
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Anoop Saraya
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Shalimar
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
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22
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Gautam UC, Pydi YS, Selladurai S, Das CJ, Thittai AK, Roy S, Datla NV. A Poly-vinyl Alcohol (PVA)-based phantom and training tool for use in simulated Transrectal Ultrasound (TRUS) guided prostate needle biopsy procedures. Med Eng Phys 2021; 96:46-52. [PMID: 34565552 DOI: 10.1016/j.medengphy.2021.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 08/16/2021] [Accepted: 08/24/2021] [Indexed: 10/20/2022]
Abstract
Trans-rectal ultrasound-guided needle biopsy is a well-established diagnosis technique for prostate cancer. To enhance the needle manoeuvring skills under ultrasound (US) guidance, it is preferable to train medical practitioners in needle biopsy on tissue-mimicking phantoms. This phantom should mimic the morphology as well as mechanical and acoustic properties of the human male pelvic region to provide a surgical experience and feedback. In this study, polyvinyl alcohol (PVA) was used and evaluated for prostate phantom development, that is stiffness tunable, US-compatible and durable phantom material. Three samples, each with 5%, 10%, and 15% concentration of PVA material, were prepared, and their mechanical and shrinkage characteristics were investigated. The anatomy of male pelvic region was used to develop an anatomically correct phantom. Later US-guided needle biopsy was performed on the phantom. The range of elastic moduli of the PVA samples was 2∼146 kPa. Their elastic moduli and volumes were found to remain statistically close from seventh to eighth freeze-thaw cycle (p>0.05). Initial US scans of the phantom resulted in satisfactory B-mode images, with a clear distinction between the prostate and its surrounding organs. This study demonstrated the applicability of PVA hydrogel as a phantom material for training in US-guided needle biopsy.
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Affiliation(s)
- Umesh C Gautam
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India; Department of Applied Mechanics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Yeswanth S Pydi
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | | | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - Arun K Thittai
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600036, India
| | - Sitikantha Roy
- Department of Applied Mechanics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Naresh V Datla
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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Kubihal V, Razik A, Sharma S, Das CJ. Unveiling the confusion in renal fusion anomalies: role of imaging. Abdom Radiol (NY) 2021; 46:4254-4265. [PMID: 33811515 DOI: 10.1007/s00261-021-03072-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/16/2021] [Accepted: 03/21/2021] [Indexed: 11/25/2022]
Abstract
Renal fusion anomalies are common congenital anomalies of the urogenital tract and have their genesis in the early embryonic period. They are classified into partial fusion anomalies (e.g., crossed fused ectopia, and horseshoe kidney) and complete fusion anomalies (e.g., fused pelvic kidney). Horseshoe kidney is the most common renal fusion anomaly and is characterized by the presence of two distinct functioning kidneys on either side of the vertebral column, with fusion occurring at the inferior poles in majority of the cases. Crossed fused ectopia is characterized by the presence of an ectopic kidney that crosses the midline and fuses with the orthotopic contralateral kidney, whereas fused pelvic (pancake) kidney is a complete fusion anomaly characterized by extensive medial fusion of both kidneys in the pelvis. Fusion anomalies are often associated with abnormalities of renal rotation, migration, and vascular supply, which predispose the kidneys to a number of complications and create difficulty during retroperitoneal surgeries and interventions. They are also associated with other congenital abnormalities of the urogenital tract, gastrointestinal tract, cardiovascular system, and skeletal system. Hence, a thorough understanding of the etiopathogenesis and radiological features of fusion anomalies is important for directing patient management. This review summarizes the embryological basis, clinical presentation and imaging approach to renal fusion anomalies, followed by detailed anatomical and radiological description of the morphological types, and the complications associated with these anomalies.
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Affiliation(s)
- Vijay Kubihal
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Abdul Razik
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Sanjay Sharma
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India.
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Nayyar R, Sharma K, Saini S, Das CJ, Singh P, Nayak B, Panaiyadiyan S, Seth A. Clinical Value of Patient-Specific Three-Dimensional Printing of Kidney Before Partial Nephrectomy: A Qualitative Assessment. J Endourol 2021; 35:1405-1410. [PMID: 33779294 DOI: 10.1089/end.2020.1103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Objectives: To qualitatively assess the clinical usefulness of patient-specific high-fidelity three-dimensional (3D) print model of kidney before partial nephrectomy (PN) and to identify subset domains where it may help in clinical terms. Materials and Methods: Thirteen 3D models were printed for tumors having RENAL nephrometry score of ≥8. Their usage for PN was assessed prospectively using a qualitative questionnaire to be answered on a Likert scale of 1-10. The questions focused on realistic resemblance, preoperative dry surgical run, intertest comparison, surgical impact, and overall beneficence domains as perceived by primary surgeons with respect to surgical conduct during PN. Results: Mean RENAL score was 9.15 (8-11). Models were rated high (9.07 ± 0.86) for realistic resemblance domain and were rated better than contrast-enhanced computed tomography (CECT) (8.38 ± 0.87) and intraoperative ultrasonography (8.07 ± 1.26) for orientation regarding resection margins. A further marginal improvement to 8.2 ± 0.84 was noted against ultrasound where surgeon did a dry cut preoperatively. Use of superselective arterial approach in four, precise awareness about dissection of a major vessel in four, retroperitoneoscopic approach in one, and surgical margin awareness in three were directly attributed to the model. Overall utility of having a model printed was rated high (8.23 ± 1.3). Conclusion: The 3D print models of complex renal tumors have high realistic resemblance to actual patient's anatomy. They were rated better than preoperative CECT or intraoperative ultrasonography for orientation regarding surgical resection margins. It may also help change or modify the surgical plan in a subset of patients with a potential to improve overall outcomes in these complex cases.
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Affiliation(s)
- Rishi Nayyar
- Department of Urology and All India Institute of Medical Sciences, New Delhi, India
| | - Kulbhushan Sharma
- Department of Urology and All India Institute of Medical Sciences, New Delhi, India
| | - Sumit Saini
- Department of Urology and All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Prabhjot Singh
- Department of Urology and All India Institute of Medical Sciences, New Delhi, India
| | - Brusabhanu Nayak
- Department of Urology and All India Institute of Medical Sciences, New Delhi, India
| | - Sridhar Panaiyadiyan
- Department of Urology and All India Institute of Medical Sciences, New Delhi, India
| | - Amlesh Seth
- Department of Urology and All India Institute of Medical Sciences, New Delhi, India
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25
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Singh A, Das CJ, Das BK, Gupta AK. Utility of diffusion weighted imaging in diagnosing subdiaphragmatic endometriosis presenting as shoulder pain. Indian J Radiol Imaging 2021; 27:314-317. [PMID: 29089681 PMCID: PMC5644326 DOI: 10.4103/ijri.ijri_86_16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Extrapelvic endometriosis (EPE) is a rare entity which may potentially occur at any site. Symptomatic EPE is now increasingly being managed laparoscopically. Imaging is imperative in diagnosis as well as extent delineation prior to surgery. In addition to increasing the success rate of diagnostic laparoscopy, prior knowledge of EPE at certain sites may modify the standard surgical technique. We present here an unusual case of chronic pain in the right shoulder in a 26-year-old female caused by subdiaphragmatic endometriosis (SDE). It was noticed on conventional magnetic resonance imaging (MRI) sequences; however, due to the lack of the characteristic signal intensity, imaging findings were noncontributory. Diffusion-weighted imaging (DWI) facilitated its characterization and precisely mapped the extent of involvement. SDE should be suspected in young females presenting with cyclical shoulder pain. Due to nonspecific clinical features, it may remain undiagnosed. MRI is the imaging modality of choice in evaluation of EPE. Including DWI sequence in the MR protocol increases the diagnostic precision besides delineating the extent of involvement noninvasively.
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Affiliation(s)
| | | | - Bimal K Das
- Department of Microbiology, AIIMS, New Delhi, India
| | - A K Gupta
- Department of Radiology, AIIMS, New Delhi, India
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Abstract
Percutaneous vascular embolization plays an important role in the management of various gynecologic and obstetric abnormalities. Transcatheter embolization is a minimally invasive alternative procedure to surgery with reduced morbidity and mortality, and preserves the patient's future fertility potential. The clinical indications for transcatheter embolization are much broader and include many benign gynecologic conditions, such as fibroid, adenomyosis, and arteriovenous malformations (AVMs), as well as intractable bleeding due to inoperable advanced-stage malignancies. The most well-known and well-studied indication is uterine fibroid embolization. Uterine artery embolization (UAE) may be performed to prevent or treat bleeding associated with various obstetric conditions, including postpartum hemorrhage (PPH), placental implantation abnormality, and ectopic pregnancy. Embolization of the uterine artery or the internal iliac artery also may be performed to control pelvic bleeding due to coagulopathy or iatrogenic injury. This article discusses these gynecologic and obstetric indications for transcatheter embolization and reviews procedural techniques and outcomes.
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Affiliation(s)
- Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Deepak Rathinam
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Smita Manchanda
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - D N Srivastava
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
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Aggarwal A, Das CJ, Manchanda S. Imaging Spectrum of Female Genital Tuberculosis: A Comprehensive Review. Curr Probl Diagn Radiol 2021; 51:617-627. [PMID: 34304946 DOI: 10.1067/j.cpradiol.2021.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 04/25/2021] [Accepted: 06/16/2021] [Indexed: 11/22/2022]
Abstract
Female genital tuberculosis is a relatively uncommon form of extrapulmonary tuberculosis that is under-reported and under-recognized. The early course of the disease has fewer manifestations, resulting in late presentation with grave complications like infertility and ectopic pregnancy. Also, difficulty in isolation of the causative bacteria further delays the diagnosis. The radiologist should be well versed with imaging findings of female genital TB to help the clinicians to initiate prompt treatment. This review shall cover imaging findings of female genital TB involving fallopian tubes, uterus, ovaries, cervix, vagina, and vulva on different imaging modalities. Fallopian tubes are almost always involved in genital TB followed by uterus and ovaries. Hysterosalpingogram and ultrasound can best detect tubercular changes in fallopian tubes and uterus whereas cross-sectional imaging is essential for the diagnosis of ovarian or peritoneal TB as they closely mimic malignancy. Cervical, vaginal, or vulval TB produces nonspecific changes and histopathological diagnosis is required for confirmation of the diagnoses. Close differential diagnosis on imaging like malignancy or pelvic inflammatory disease, are also discussed with a brief discussion of the pathogenesis.
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Affiliation(s)
- Ankita Aggarwal
- Department of Radiology, VMMC and Safdarjung Hospital, New Delhi, India
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), New Delhi, India.
| | - Smita Manchanda
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
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28
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Ahmad Z, Goswami S, Paneerselvam A, Kabilan K, Chowdhury H, Roy A, Guleria R, Soni KD, Baruah U, Das CJ. Imaging of Coronavirus Disease 2019 Infection From Head to Toe: A Primer for the Radiologist. Curr Probl Diagn Radiol 2021; 50:842-855. [PMID: 34330569 PMCID: PMC8256677 DOI: 10.1067/j.cpradiol.2021.06.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 06/04/2021] [Accepted: 06/16/2021] [Indexed: 01/08/2023]
Abstract
Coronavirus Disease 2019 (COVID-19) disease has rapidly spread around the world after initial identification in Wuhan, China, in December 2019. Most common presentation is mild or asymptomatic disease, followed by pneumonia, and rarely- multiorgan failure and Acute Respiratory Distress Syndrome (ARDS). Knowledge about the pathophysiology, imaging and treatment of this novel virus is rapidly evolving due to ongoing worldwide research. Most common imaging modalities utilized during this pandemic are chest radiography and HRCT with findings of bilateral peripheral, mid and lower zone GGO and/or consolidation, vascular enlargement and crazy paving. HRCT is also useful for prognostication and follow-up of severely ill COVID-19 patients. Portable radiography allows follow-up of ICU patients & obviates the need of shifting critically ill patients and disinfection of CT room. As the pandemic has progressed, numerous neurologic manifestations have been described in COVID-19 including stroke, white matter hyperintensities and demyelination on MRI. Varying abdominal presentations have been described, which on imaging either show evidence of COVID-19 pneumonia in lung bases or show abdominal findings including bowel thickening and vascular thrombosis. Numerous thrombo-embolic and cardiovascular complications have also been described in COVID-19 including arterial and venous thrombosis, pulmonary embolism and myocarditis. It is imperative for radiologists to be aware of all the varied faces of this disease on imaging, as they may well be the first physician to suspect the disease. This article aims to review the multimodality imaging manifestations of COVID-19 disease in various organ systems from head to toe.
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Affiliation(s)
- Zohra Ahmad
- Department of Radiodiagnosis, Gauhati Medical College, Guwahati, Assam, India
| | - Sneha Goswami
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | | | - Kaviraj Kabilan
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Himanshu Chowdhury
- Consultant Radiologist, Dept of Radiology, Sir HN Reliance Foundation Hospital and Research Centre, Mumbai, Maharashtra, India
| | - Ambuj Roy
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Kapil Dev Soni
- Critical & Intensive care, JPN Apex Trauma Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Udismita Baruah
- Department of Anesthesiology, VMMC and Safdarjung Hospital, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India.
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Singh D, Kumar V, Das CJ, Singh A, Mehndiratta A. Characterisation of prostate cancer using texture analysis for diagnostic and prognostic monitoring. NMR Biomed 2021; 34:e4495. [PMID: 33638244 DOI: 10.1002/nbm.4495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 02/06/2021] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
Automated classification of significant prostate cancer (PCa) using MRI plays a potential role in assisting in clinical decision-making. Multiparametric MRI using a machine-aided approach is a better step to improve the overall accuracy of diagnosis of PCa. The objective of this study was to develop and validate a framework for differentiating Prostate Imaging-Reporting and Data System version 2 (PI-RADS v2) grades (grade 2 to grade 5) of PCa using texture features and machine learning (ML) methods with diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC). The study cohort included an MRI dataset of 59 patients with clinically proven PCa. Regions of interest (ROIs) for a total of 435 lesions were delineated from the segmented peripheral zones of DWI and ADC. Six texture methods comprising 98 texture features in total (49 each of DWI and ADC) were extracted from lesion ROIs. Random forest (RF) and correlation-based feature selection methods were applied on feature vectors to select the best features for classification. Two ML classifiers, support vector machine (SVM) and K-nearest neighbour, were used and validated by 10-fold cross-validation. The proposed framework achieved high diagnostic performance with a sensitivity of 85.25% ± 3.84%, specificity of 95.71% ± 1.96%, accuracy of 84.90% ± 3.37% and area under the receiver-operating characteristic curve of 0.98 for PI-RADS v2 grades (2 to 5) classification using the RF feature selection method and Gaussian SVM classifier with combined features of DWI + ADC. The proposed computer-assisted framework can distinguish between PCa lesions with different aggressiveness based on PI-RADS v2 standards using texture analysis to improve the efficiency of PCa diagnostic performance.
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Affiliation(s)
- Dharmesh Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Virendra Kumar
- Department of NMR, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Anup Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
- Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Mehndiratta
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
- Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India
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Razik A, Das CJ, Sharma R, Malla S, Sharma S, Seth A, Srivastava DN. Utility of first order MRI-Texture analysis parameters in the prediction of histologic grade and muscle invasion in urinary bladder cancer: a preliminary study. Br J Radiol 2021; 94:20201114. [PMID: 33882245 DOI: 10.1259/bjr.20201114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVE To explore the utility of first-order MRI-texture analysis (TA) parameters in predicting histologic grade and muscle invasion in urinary bladder cancer (UBC). METHODS After ethical clearance, 40 patients with UBC, who were imaged on a 3.0-Tesla scanner, were retrospectively included. Using the TexRADTM platform, two readers placed freehand ROI on the sections demonstrating the largest dimension of the tumor, evaluating only one tumor per patient. Interobserver reproducibility was assessed using the intraclass correlation coefficient (ICC). Mann-Whitney U test and ROC curve analysis were used to identify statistical significance and select parameters with high class separation capacity (AUC >0.8), respectively. Pearson's test was used to identify redundancy in the results. RESULTS All texture parameters showed excellent ICC. The best parameters in differentiating high and low-grade tumors were mean/ mean of positive pixels (MPP) at SSF 0 (AUC: 0.897) and kurtosis at SSF 5 (AUC: 0.828) on the ADC images. In differentiating muscle invasive from non-muscle invasive tumors, mean/ MPP at SSF 0 on the ADC images showed AUC >0.8; however, this finding resulted from the confounding effect of high-grade histology on the ADC values of muscle invasive tumors. CONCLUSION MRI-TA generated few parameters which were reproducible and useful in predicting histologic grade. No independent parameters predicted muscle invasion. ADVANCES IN KNOWLEDGE There is lacuna in the literature concerning the role of MRI-TA in the prediction of histologic grade and muscle invasion in UBC. Our study generated a few first-order parameters which were useful in predicting high-grade histology.
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Affiliation(s)
- Abdul Razik
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Chandan J Das
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Raju Sharma
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Sundeep Malla
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Sanjay Sharma
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Amlesh Seth
- Departments of Urology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Deep Narayan Srivastava
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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Ramachandran A, Das CJ, Razik A. Male genital tract tuberculosis: A comprehensive review of imaging findings and differential diagnosis. Abdom Radiol (NY) 2021; 46:1677-1686. [PMID: 33044653 DOI: 10.1007/s00261-020-02811-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/21/2020] [Accepted: 09/30/2020] [Indexed: 01/09/2023]
Abstract
Urogenital tuberculosis is the most common form of extrapulmonary tuberculosis. Genital organ involvement occurs as a continuum of urinary tract tuberculosis and often presents a diagnostic challenge due to the non-specific nature of the symptoms. Delay in diagnosis may lead to complications such as infertility and perineoscrotal sinuses. Imaging plays an important role in raising timely suspicion of tuberculosis. In this article, we describe the imaging findings of male genital tuberculosis and the differential diagnosis. High-resolution ultrasonography (HRUS) is the best modality for assessing the epididymis, testis, scrotum and vas deferens, whereas MRI is optimal for evaluating the prostate, seminal vesicles and ejaculatory ducts. Epididymis is the most common site of genital tuberculosis, and presents as a nodular lesion limited to the tail or as diffuse enlargement. The proximal vas deferens is also frequently involved due to anatomical contiguity and shows diffuse or nodular thickening. Advanced cases may show pyocele formation and scrotal wall sinuses. Testicular involvement is almost always secondary to epididymal tuberculosis and presents as single or multiple nodules, diffuse enlargement, or the 'miliary' pattern. Isolated testicular involvement should raise suspicion of malignancy. Tuberculosis of the prostate is often asymptomatic. The most common imaging manifestations are nodules and the diffuse forms, which may later evolve into abscesses. Fibrosis and calcification occur with healing. Seminal vesicle and ejaculatory duct involvement with fibrosis may cause infertility. Awareness of the imaging findings would enable the radiologist to raise timely suspicion, so that prompt treatment is initiated and complications are prevented.
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Mangalgi S, Madan K, Das CJ, Singh G, Sati H, Kanwar Yadav R, Xess I, Singh S, Bhowmik D, Agarwal SK, Bagchi S. Pulmonary infections after renal transplantation: a prospective study from a tropical country. Transpl Int 2021; 34:525-534. [PMID: 33423313 DOI: 10.1111/tri.13817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/10/2020] [Accepted: 01/07/2021] [Indexed: 02/05/2023]
Abstract
Pulmonary infection is a leading cause of morbidity and mortality in renal transplant recipients. In a prospective study, we characterized their epidemiology in a tropical country with high infectious disease burden. Adult renal transplant recipients presenting with pulmonary infections from 2015 to 2017 were evaluated using a specific diagnostic algorithm. 102 pulmonary infections occurred in 88 patients. 32.3% infections presented in the first year, 31.4% between 1 and 5, and 36.3% beyond 5 years after transplantation. Microbiological diagnosis was established in 69.6%, and 102 microorganisms were identified. Bacterial infection (29.4%) was most common followed by tuberculosis (23.5%), fungal (20.6%), Pneumocystis jiroveci (10.8%), viral (8.8%), and nocardial (6.9%) infections. Tuberculosis(TB) and bacterial infections presented throughout the post-transplant period, while Pneumocystis (72.7%), cytomegalovirus (87.5%) and nocardia (85.7%) predominantly presented after >12 months. Fungal infections had a bimodal presentation, between 2 and 6 months (33.3%) and after 12 months (66.7%). Four patients had multi-drug resistant(MDR) TB. In 16.7% cases, plain radiograph was normal and infection was diagnosed by a computed tomography imaging. Mortality due to pulmonary infections was 22.7%. On multivariate Cox regression analysis, use of ATG (HR-2.39, 95% CI: 1.20-4.78, P = 0.013), fungal infection (HR-2.14, 95% CI: 1.19-3.84, P = 0.011) and need for mechanical ventilation (9.68, 95% CI: 1.34-69.82, P = 0.024) were significant predictors of mortality in our patients. To conclude, community-acquired and endemic pulmonary infections predominate with no specific timeline and opportunistic infections usually present late. Nocardiosis and MDR-TB are emerging challenges.
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Affiliation(s)
- Shreepriya Mangalgi
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - Karan Madan
- Department of Pulmonary Medicine and Sleep Disorders, New Delhi, India
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Gagandeep Singh
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Hemchandra Sati
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - Raj Kanwar Yadav
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - Immaculata Xess
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Sarman Singh
- Department of Laboratory Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Dipankar Bhowmik
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - Sanjay Kumar Agarwal
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - Soumita Bagchi
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
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Das CJ, Netaji A, Razik A, Verma S. MRI-Targeted Prostate Biopsy: What Radiologists Should Know. Korean J Radiol 2020; 21:1087-1094. [PMID: 32691544 PMCID: PMC7371617 DOI: 10.3348/kjr.2019.0817] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 02/02/2020] [Accepted: 03/12/2020] [Indexed: 12/15/2022] Open
Affiliation(s)
- Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, India
| | - Arjunlokesh Netaji
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, India
| | - Abdul Razik
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, India
| | - Sadhna Verma
- Department of Radiology, University of Cincinnati Medical Center, Cincinnati, OH, USA.
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Singh D, Kumar V, Das CJ, Singh A, Mehndiratta A. Segmentation of prostate zones using probabilistic atlas-based method with diffusion-weighted MR images. Comput Methods Programs Biomed 2020; 196:105572. [PMID: 32544780 DOI: 10.1016/j.cmpb.2020.105572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 05/10/2020] [Accepted: 05/24/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND AND OBJECTIVE Accurate segmentation of prostate and its zones constitute an essential preprocessing step for computer-aided diagnosis and detection system for prostate cancer (PCa) using diffusion-weighted imaging (DWI). However, low signal-to-noise ratio and high variability of prostate anatomic structures are challenging for its segmentation using DWI. We propose a semi-automated framework that segments the prostate gland and its zones simultaneously using DWI. METHODS In this paper, the Chan-Vese active contour model along with morphological opening operation was used for segmentation of prostate gland. Then segmentation of prostate zones into peripheral zone (PZ) and transition zone (TZ) was carried out using in-house developed probabilistic atlas with partial volume (PV) correction algorithm. The study cohort included MRI dataset of 18 patients (n = 18) as our dataset and methodology were also independently evaluated using 15 MRI scans (n = 15) of QIN-PROSTATE-Repeatability dataset. The atlas for zones of prostate gland was constructed using dataset of twelve patients of our patient cohort. Three-fold cross-validation was performed with 10 repetitions, thus total 30 instances of training and testing were performed on our dataset followed by independent testing on the QIN-PROSTATE-Repeatability dataset. Dice similarity coefficient (DSC), Jaccard coefficient (JC), and accuracy were used for quantitative assessment of the segmentation results with respect to boundaries delineated manually by an expert radiologist. A paired t-test was performed to evaluate the improvement in zonal segmentation performance with the proposed PV correction algorithm. RESULTS For our dataset, the proposed segmentation methodology produced improved segmentation with DSC of 90.76 ± 3.68%, JC of 83.00 ± 5.78%, and accuracy of 99.42 ± 0.36% for the prostate gland, DSC of 77.73 ± 2.76%, JC of 64.46 ± 3.43%, and accuracy of 82.47 ± 2.22% for the PZ, and DSC of 86.05 ± 1.50%, JC of 75.80 ± 2.10%, and accuracy of 91.67 ± 1.56% for the TZ. The segmentation performance for QIN-PROSTATE-Repeatability dataset was, DSC of 85.50 ± 4.43%, JC of 75.00 ± 6.34%, and accuracy of 81.52 ± 5.55% for prostate gland, DSC of 74.40 ± 1.79%, JC of 59.53 ± 8.70%, and accuracy of 80.91 ± 5.16% for PZ, and DSC of 85.80 ± 5.55%, JC of 74.87 ± 7.90%, and accuracy of 90.59 ± 3.74% for TZ. With the implementation of the PV correction algorithm, statistically significant (p<0.05) improvements were observed in all the metrics (DSC, JC, and accuracy) for both prostate zones, PZ and TZ segmentation. CONCLUSIONS The proposed segmentation methodology is stable, accurate, and easy to implement for segmentation of prostate gland and its zones (PZ and TZ). The atlas-based segmentation framework with PV correction algorithm can be incorporated into a computer-aided diagnostic system for PCa localization and treatment planning.
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Affiliation(s)
- Dharmesh Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Virendra Kumar
- Department of NMR, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Anup Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India; Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Mehndiratta
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India; Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India.
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Abstract
Prostate cancer is the fourth most common cancer and population-based screening programmes are being increasingly adopted worldwide. Screening-positive patients undergo routine transrectal ultrasound (TRUS)-guided systematic biopsy, which is the current diagnostic standard for prostate cancer. However, systematic biopsies suffer from poor sensitivity, especially for the tumors of the anterior prostate and apex as well as in large volume glands. In the past decade, MRI-guided targeted biopsies have come up, which utilize the multiparametric capability of MRI to target lesions for sampling. MRI/TRUS fusion biopsies combine the advantages of MRI-targeting with that of real-time guidance made possible by TRUS. MRI-TRUS fusion biopsies are being increasingly used in men with high clinical suspicion of prostate cancer who have had prior negative systematic biopsies. A large number of fusion biopsy platforms are currently available commercially. Although the basic workflow is similar, there are differences in the operational software, biopsy routes offered, TRUS acquisition technique, type of correction applied at the time of fusion and in the probe tracking hardware. The article describes the current role and indications of MRI-TRUS fusion biopsy followed by a discussion on the workflow, patient preparation, biopsy procedure and complications.
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Affiliation(s)
- Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029, India
| | - Abdul Razik
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029, India
| | - Arjunlokesh Netaji
- Department of Radiology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi, 110029, India
| | - Sadhna Verma
- Department of Radiology, University of Cincinnati Medical Center, ML 0761, 234 Goodman Street, Cincinnati, OH, 45267-0761, USA.
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Das CJ, Razik A, Sharma S. Hemodialysis in Infants: Challenges and New Paradigms. J Vasc Interv Radiol 2020; 31:787. [DOI: 10.1016/j.jvir.2020.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 10/24/2022] Open
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Manoharan D, Sharma S, Das CJ, Kumar R, Kumar P. Split bolus dual-energy CT urography after urine dilution: a one-stop shop for detection and characterisation of urolithiasis. Clin Radiol 2020; 75:643.e11-643.e18. [PMID: 32345438 DOI: 10.1016/j.crad.2020.03.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 03/11/2020] [Indexed: 10/24/2022]
Abstract
AIM To determine the diagnostic performance of split-bolus dual-energy computed tomography (CT) urography (SBDECTU) in the detection and characterisation of urolithiasis. MATERIALS AND METHODS This single-centre Institute Ethics Committee (IEC)-approved prospective study was conducted from April 2014 to November 2015. One hundred and thirty consenting adults with microscopic haematuria underwent dual-energy true non-enhanced CT (DETNE) of the whole abdomen followed by a SBDECTU. The SBDECTU protocol consisted of synchronous nephrogram-urogram acquisition following urine dilution by oral hydration and normal saline injection. Calculi were detected and characterised using virtual non-enhanced (VNE) images derived from SBDECT were compared with DETNE (the reference standard). The subjective image quality and radiation dose were compared. RESULTS Twenty-six participants had one or more calculi (total 129 calculi) detected on DETNE CT. The sensitivity and specificity of VNE on a per-patient basis were 100%. Of the 129 calculi, 118 were detected on VNE, with a sensitivity of 91.47% and an accuracy of 91.47%. Of the calculi, 83.9% (99/118) could be characterised on SBDECTU images. On VNE images, complete iodine subtraction was seen in 73.1% (19/26). By omitting DETNE CT, the mean dose-length product of 537.6±152.9 mGy and volume CT dose index of 10.9±2.9 mGy•cm2 could have been saved. CONCLUSION SBDECTU has high diagnostic accuracy in the detection and characterisation of clinically significant urinary calculi at potentially half the radiation dose.
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Affiliation(s)
- D Manoharan
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110049, India
| | - S Sharma
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110049, India.
| | - C J Das
- Department of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110049, India
| | - R Kumar
- Department of Urology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110049, India
| | - P Kumar
- Department of Medical Physics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
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Philip NM, Naranje P, Bagchi S, Das CJ, Agarwal SK. Multiple abscesses in a renal transplant recipient. Kidney Int 2019; 96:526. [PMID: 31331482 DOI: 10.1016/j.kint.2019.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 02/01/2019] [Accepted: 02/05/2019] [Indexed: 11/17/2022]
Affiliation(s)
- Nishita Mohan Philip
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - Priyanka Naranje
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Soumita Bagchi
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India.
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Sanjay Kumar Agarwal
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
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Tiwari DP, Razik A, Das CJ, Kumar R. Prospective analysis of factors predicting feasibility & success of longitudinal intussusception vasoepididymostomy in men with idiopathic obstructive azoospermia. Indian J Med Res 2019; 149:51-56. [PMID: 31115375 PMCID: PMC6507538 DOI: 10.4103/ijmr.ijmr_1192_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background & objectives : Microsurgical reconstruction for idiopathic obstructive azoospermia is a challenging procedure, and selection of appropriate patients is important for successful outcomes. This prospective study was done to evaluate the ability of scrotal ultrasound measurements to predict the surgical feasibility and determine factors that could predict a patent anastomosis following vaso-epididymal anastomosis (VE) in men with idiopathic obstructive azoospermia. Methods : In this prospective study, men diagnosed with idiopathic obstructive azoospermia, scheduled for a longitudinal intussusception VE, underwent a scrotal ultrasound measurement of testicular and epididymal dimensions. During surgery, site and type of anastomosis, presence of sperms in the epididymal fluid and technical satisfaction with the anastomosis were recorded. All men where VE could be performed were followed up for appearance of sperms in the ejaculate. Ultrasound parameters were compared between men who had a VE versus those with negative exploration. Predictive factors were compared between men with or without a patent anastomosis. Results : Thirty four patients were included in the study conducted between September 2014 and August 2016 and a VE was possible in only 19 (55%) patients. Of these 19 patients, six had a patent anastomosis with one pregnancy. Preoperative ultrasound measurements could not identify patients where a VE could not be performed. Motile sperm in the epididymal fluid was the only significant predictor of a successful anastomosis. Interpretation & conclusion : Forty five per cent of men planned for a VE for idiopathic obstructive azoospermia could not undergo a reconstruction. Ultrasound assessment of testicular and epididymal dimensions could not predict the feasibility of performing a VE. The presence of motile sperms in the epididymal fluid was the only significant predictor of a patent VE in our study.
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Affiliation(s)
- Devi Prasad Tiwari
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Abdul Razik
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Rajeev Kumar
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
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Abstract
Prostate cancer, unlike other cancers, has been sampled in a non-targeted, systematic manner in the past three decades. On account of the low volume of prostate sampled despite the multiple cores acquired, systematic transrectal (TRUS) biopsy suffered from low sensitivity in picking up clinically significant prostate cancer. In addition, a significant number of cancers of the anterior, lateral peripheral zone, and the apex were missed as these areas were undersampled or missed during this biopsy protocol. Subsequently, the number of cores acquired was increased with special focus given to targeting the previously undersampled areas. These procedures led to an increase in the complication rates as well as detection of more clinically insignificant cancers. The advent of multiparametric magnetic resonance imaging (MRI) and its high intrinsic tissue contrast enabled better detection of prostate cancer. This led to the introduction of MRI-targeted biopsies with either MRI-TRUS fusion or under direct (in-gantry) guidance. MRI-targeted biopsies increased the percentage of positive cores and detection of clinically significant prostate cancers; however, these are expensive, time-intensive, require significant capital investment and operator expertise. This article describes the indications, workflow, complications, advantages, and disadvantages of TRUS-guided biopsy followed by MRI-guided biopsies.
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Affiliation(s)
- C J Das
- Department of Radiology, All India Institute of Medical Sciences (A.I.I.M.S), Ansari Nagar, New Delhi, 110029, India
| | - A Razik
- Department of Radiology, All India Institute of Medical Sciences (A.I.I.M.S), Ansari Nagar, New Delhi, 110029, India
| | - S Sharma
- Department of Radiology, All India Institute of Medical Sciences (A.I.I.M.S), Ansari Nagar, New Delhi, 110029, India
| | - S Verma
- Department of Radiology, The Veterans Administration Hospital Cincinnati, The University of Cincinnati Medical Center, 234 Goodman Street, Cincinnati, OH 45267, USA.
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Affiliation(s)
- Sundeep Malla
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | - Abdul Razik
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, Delhi, India
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Bharati A, Mandal SR, Gupta AK, Seth A, Sharma R, Bhalla AS, Das CJ, Chatterjee S, Kumar P. Development of a Method to Determine Electron Density and Effective Atomic Number of High Atomic Number Solid Materials Using Dual-Energy Computed Tomography. J Med Phys 2019; 44:49-56. [PMID: 30983771 PMCID: PMC6438052 DOI: 10.4103/jmp.jmp_125_18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Aim: This study aims to develop a method using dual-energy computed tomography (DECT) to determine the effective atomic number and electron density of substances. Materials and Methods: Ten chemical substances of pure analytical grade were obtained from various manufacturers. These chemicals were pelletized using a hydraulic press. These pellets were scanned using DECT. A relation was obtained for the pellet's atomic number and electron density with their CT number or Hounsfield unit (HU) values. Calibration coefficients were determined. Five new chemical pellets were scanned, and their effective atomic number and electron densities were determined using the calibration coefficients to test the efficacy of the calibration method. Results: The results obtained for effective atomic number and electron density from the HU number of DECT images were within ±5% and ±3%, respectively, of their actual values. Conclusions: DECT can be used as an effective tool for determining the effective atomic number and electron density of high atomic number substance.
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Affiliation(s)
- Avinav Bharati
- Department of Radiation Oncology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Susama Rani Mandal
- Department of Radiotherapy, Government Medical College, Kannauj, Uttar Pradesh, India
| | | | - Amlesh Seth
- Department of Urology, AIIMS, New Delhi, India
| | - Raju Sharma
- Department of Radiodiagnosis, AIIMS, New Delhi, India
| | - Ashu S Bhalla
- Department of Radiodiagnosis, AIIMS, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, AIIMS, New Delhi, India
| | - S Chatterjee
- Department of BGVS, Chemical Engineering Building (Old), Institute of Science, Bengaluru, Karnataka, India
| | - Pratik Kumar
- Department of Medical Physics Unit, IRCH, AIIMS, New Delhi, India
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Kaushal R, Das CJ, Singh P, Dogra PN, Kumar R. Multiparametric magnetic resonance imaging-transrectal ultrasound fusion biopsies increase the rate of cancer detection in populations with a low incidence of prostate cancer. Investig Clin Urol 2019; 60:156-161. [PMID: 31098422 PMCID: PMC6495042 DOI: 10.4111/icu.2019.60.3.156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 02/11/2019] [Indexed: 11/18/2022] Open
Abstract
Purpose To prospectively evaluate the diagnostic yield of multiparametric magnetic resonance imaging (mpMRI)-fusion, transrectal ultrasound (TRUS)-guided prostate biopsies for detection of prostate cancer in an Asian population with a low incidence of prostate cancer. Materials and Methods A total of 131 males with suspected prostate cancer were recruited to undergo fusion biopsy with the Artemis prostate fusion biopsy device (Eigen, Grass Valley, CA, USA). All patients underwent standard 12-core systematic biopsies in addition to biopsies targeted at the mpMRI-identified abnormal regions. Yield from the standard cores was compared with that from the targeted cores. Gleason scores of 4+3 or higher were considered significant. Results The mean age of the patients was 63.54±7.96 years and the mean prostate-specific antigen value was 9.75±5.35 ng/mL. A total of 36 patients had cancer, of which 3 (8.3%) were detected only on standard cores and 3 (8.3%) only on targeted cores. Of the clinically significant cancers (n=30), targeted biopsy detected a higher number (28/30, 93.3%) than standard biopsy (21/30, 70.0%). A total of 6 of 8 cancers (75.0%) that were insignificant on standard biopsy were upgraded to significant cancer on targeted cores. Conclusions Eight percent of cancers were detected only on MRI-TRUS fusion-targeted biopsies, whereas the method upgraded more than two-thirds of insignificant cancers to significant cancers. Fusion biopsies thus provide incremental information over standard TRUS biopsies in the diagnosis of significant prostate cancer in populations with a low incidence of prostate cancer.
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Affiliation(s)
- Rohit Kaushal
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Prabhjot Singh
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Prem Nath Dogra
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Rajeev Kumar
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
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Kapur S, Das CJ, Sharma S. Multiparametric Magnetic Resonance Imaging of the Prostate: An Update. Annals of the National Academy of Medical Sciences (India) 2019. [DOI: 10.1055/s-0039-1694077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
AbstractMultiparametric magnetic resonance imaging (mp-MRI) has emerged as an important tool for the detection and characterization of prostatic lesions. It now plays a quintessential role in the surveillance, diagnosis, and staging of prostate cancer (PCa), as well as for the detection of local recurrence. As reliance on serum prostate-specific antigen has declined in the recent times, mp-MRI has emerged as the go-to tool for urologists all over the world. Hence, for the clinician, it has become necessary to be well versed with the technique, image interpretation, and fallacies of mp-MRI. Since mp-MRI has the advantage of better contrast resolution, combining PSMA PET (prostate-specific membrane antigen-positron emission tomography) with MRI could provide additional functional information. However, due to the absence of enough evidence supporting its routine use, mp-MRI still has the unsurpassed role in the initial diagnosis and local staging of PCa.
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Affiliation(s)
- Savinay Kapur
- Department of Radiodiagnosis, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Chandan J. Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Sanjay Sharma
- Department of Radiodiagnosis, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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Singh G, Swamy A, Kumari K, Brijwal M, Damle NA, Das CJ, Bhowmik D. The Case | Mass in nonfunctioning first renal allograft in a recipient of 2 transplant kidneys. Kidney Int 2019; 95:1001-1002. [PMID: 30904055 DOI: 10.1016/j.kint.2018.11.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 11/16/2018] [Accepted: 11/20/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Geetika Singh
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Anitha Swamy
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - Kalpana Kumari
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Megha Brijwal
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Nishikant A Damle
- Deparment of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Dipankar Bhowmik
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India.
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Garg B, Manhas V, Vardhan A, Srivastava DN, Das CJ, Vibha D, Gupta V, Malhotra R, Kotwal P. Thumb Opposition Recovery Following Surgery for Severe Carpal Tunnel Syndrome: A Clinical, Radiological, and Electrophysiological Pilot Study. J Hand Surg Am 2019; 44:157.e1-157.e5. [PMID: 29934085 DOI: 10.1016/j.jhsa.2018.05.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 03/31/2018] [Accepted: 05/01/2018] [Indexed: 02/02/2023]
Abstract
PURPOSE To objectively assess recovery of thumb opposition in patients with carpal tunnel syndrome (CTS) after open carpal tunnel release and to evaluate electrophysiological and magnetic resonance (MR) neurography findings as predictors of thumb opposition recovery. METHODS A total of 22 patients with severe CTS and thenar atrophy were included in this study. A detailed clinical, electrophysiological, and MR neurography evaluation was done both before and after surgery at 6 months to assess thumb opposition recovery. RESULTS The median duration of symptoms was 12 months (interquartile range, 12-20 months). The compound muscle action potential of the abductor pollisis brevis (CMAP-APB) also showed statistically significant improvement of 0.5 + 0.2 mV after surgery. Tip-tip pulp pinch strength increased from 1.2 ± 0.4 to 2.0 ± 0.4 kg at 6-month follow-up, lateral pulp pinch strength increased from 1.9 ± 0.6 to 2.8 ± 0.9 kg at 6-month follow-up, and 3-point pulp pinch also improved from 1.9 ± 0.5 to 2.8 ± 0.9 at final follow-up. On MR neurogram, the proportion of patients with abnormal median nerve morphology decreased from 81.8% to 68.2%, abnormal thenar branch morphology decreased from 63.6% to 36.4% and denervation edema deceased from 59.1% to 13.6%. CONCLUSIONS Patients suffering from severe CTS with thenar atrophy and detectable CMAP-APB showed promising improvement following open carpal tunnel release. TYPE OF STUDY/LEVEL OF EVIDENCE Prognostic IV.
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Affiliation(s)
- Bhavuk Garg
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
| | - Vikrant Manhas
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India.
| | - Anand Vardhan
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
| | | | - Chandan J Das
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Deepti Vibha
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Vivek Gupta
- Department of Community Ophthalmology, All India Institute of Medical Sciences, New Delhi, India
| | - Rajesh Malhotra
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
| | - Prakash Kotwal
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
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Samal P, Goyal V, Makharia GK, Das CJ, Gorthi SP, Y VV, Singh MB, Srivastava MVP. Transfer Dysphagia Due to Focal Dystonia. J Mov Disord 2018; 11:129-132. [PMID: 30304925 PMCID: PMC6182304 DOI: 10.14802/jmd.17081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 08/01/2018] [Indexed: 12/02/2022] Open
Abstract
Objective
The inability to propel a bolus of food successfully from the posterior part of the oral cavity to the oropharynx is defined as transfer dysphagia. The present case series describes the varied presentation of transfer dysphagia due to focal dystonia and highlights the importance of early detection by following up on strong suspicions. Methods
We describe seven cases of transfer dysphagia due to focal dystonia. Transfer dysphagia as a form of focal dystonia may appear as the sole presenting complaint or may present with other forms of focal dystonia. Results
Four out of seven patients had pure transfer dysphagia and had previously been treated for functional dysphagia. A high index of suspicion, barium swallow including videofluoroscopy, associated dystonia in other parts of the body and response to drug therapy with trihexyphenidyl/tetrabenazine helped to confirm the diagnosis. Conclusion
Awareness of these clinical presentations among neurologists and non-neurologists can facilitate an early diagnosis and prevent unnecessary investigations.
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Affiliation(s)
- Priyanka Samal
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Vinay Goyal
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Govind K Makharia
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Vishnu V Y
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Mamta Bhushan Singh
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - M V Padma Srivastava
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
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Razik A, Das CJ, Sharma S, Seth A, Srivastava DN, Mathur S, Kumar R, Gupta AK. Diagnostic performance of diffusion-weighted MR imaging at 3.0 T in predicting muscle invasion in urinary bladder cancer: utility of evaluating the morphology of the reactive tumor stalk. Abdom Radiol (NY) 2018; 43:2431-2441. [PMID: 29392362 DOI: 10.1007/s00261-018-1458-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To evaluate the diagnostic performance of stalk morphology on diffusion-weighted imaging (DWI) in comparison with conventional MRI in predicting muscle invasion in urinary bladder cancer. METHODS The study was prospective and approved by the institutional ethics committee. A written informed consent was obtained from all the patients. The study included 56 patients who presented with bladder mass between January 2014 and November 2015. After excluding 16 patients, 40 patients with 92 tumors were assessed. All the 40 patients underwent MRI at 3.0 Tesla (Achieva, Philips) inclusive of DWI (b0, 500, 1000 and 1500). Two radiologists evaluated the images independently, and disparities were resolved through consensus. For predicting muscle invasion on T2-weighted images, tumor morphology (papillary versus non-papillary), distensibility of the underlying bladder wall, and perivesical fat infiltration were evaluated. On DWI, the criterion used in a previous study (Takeuchi et al.) was used along with tumor stalk morphology. Findings were compared with histopathology using Pearson's χ2 test, and diagnostic performance indices were calculated. RESULTS All the evaluated features were present with significantly higher frequency in muscle-invasive tumors (p < 0.001). The finding of absent or distorted stalk on DWI had the highest sensitivity (87.5%) and specificity (97.6%). Conventional imaging features of non-papillary stalk morphology, restricted distension of underlying bladder wall, perivesical fat infiltration, as well as the previous DWI criterion were less sensitive (56.3%, 68.8%, 56.3% and 56.3%, respectively) in predicting muscle invasion. CONCLUSIONS Assessment of the morphology of the reactive tumor stalk on DWI has better diagnostic performance in predicting muscle invasion than conventional MRI.
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Affiliation(s)
- Abdul Razik
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Chandan J Das
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India.
| | - Sanjay Sharma
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Amlesh Seth
- Departments of Urology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Deep N Srivastava
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Sandeep Mathur
- Departments of Pathology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Rakesh Kumar
- Departments of Nuclear Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Arun K Gupta
- Departments of Radiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
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Manoharan D, Sharma S, Das CJ, Kumar R, Singh G, Kumar P. Single-Acquisition Triple-Bolus Dual-Energy CT Protocol for Comprehensive Evaluation of Renal Masses: A Single-Center Randomized Noninferiority Trial. AJR Am J Roentgenol 2018; 211:W22-W32. [DOI: 10.2214/ajr.17.18786] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Affiliation(s)
- Dinesh Manoharan
- Department of Radiology, All India Institute of Medical Science, New Delhi 110029, India
| | - Sanjay Sharma
- Department of Radiology, All India Institute of Medical Science, New Delhi 110029, India
| | - Chandan J. Das
- Department of Radiology, All India Institute of Medical Science, New Delhi 110029, India
| | - Rajeev Kumar
- Department of Urology, All India Institute of Medical Science, New Delhi, India
| | - Geetika Singh
- Department of Pathology, All India Institute of Medical Science, New Delhi, India
| | - Pratik Kumar
- Department of Medical Physics, All India Institute of Medical Science, New Delhi, India
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Das CJ, Razik A, Sharma S. Magnetic Resonance Imaging-Transrectal Ultrasound Fusion Biopsy of the Prostate—An Update. Semin Roentgenol 2018; 53:219-226. [DOI: 10.1053/j.ro.2018.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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