901
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Marticorena Garcia SR, Guo J, Dürr M, Denecke T, Hamm B, Sack I, Fischer T. Comparison of ultrasound shear wave elastography with magnetic resonance elastography and renal microvascular flow in the assessment of chronic renal allograft dysfunction. Acta Radiol 2018; 59:1139-1145. [PMID: 29249167 DOI: 10.1177/0284185117748488] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background Monitoring of renal allograft function is essential for early identification of dysfunction and improvement of kidney transplant (KTX) outcome. Purpose To non-invasively assess renal stiffness in KTX recipients using ultrasound shear wave elastography (USE) in correlation with multifrequency magnetic resonance elastography (MRE), renal allograft function, and renal microvascular flow determined using a novel ultrasound microvascular imaging technique. Material and Methods This prospective study investigated 25 KTXs (functional KTX [FCT], n = 14; chronic KTX insufficiency [DYS], n = 11) in 20 KTX recipients (mean age = 43 ± 14 years). USE was performed using a high-frequency broadband linear transducer and compared with MRE. Shear wave velocity (SWV) was correlated with the estimated glomerular filtration rate (eGFR). Qualitative differences in renal microvascular flow were obtained using SMI. Results FCT had higher SWV than DYS in both cortex and pyramids (cortex, FCT: 3.75 ± 0.82 m/s vs. DYS: 2.79 ± 0.73 m/s, P = 0.0002; pyramid, FCT: 2.89 ± 0.46 m/s vs. DYS: 2.39 ± 0.34 m/s, P = 0.044). Cutoff values of 3.265 m/s for cortex, 2.535 m/s for pyramids, and 2.985 m/s for combined non-hilar parenchyma provided sensitivities of 72.7%, 77.8%, and 90.9% and specificities of 71.4%, 78.6%, and 85.7% for detecting renal allograft dysfunction with area under the receiver operating characteristic curve (AUC) values of 0.831, 0.841, 0.925 (95% confidence interval [CI] = 0.67-0.99, 0.66-1.02, 0.83-1.03). USE correlated positively with eGFR ( r = 0.741, P = 0.0004) and with MRE-derived SWV ( r = 0.562, P = 0.004). Renal microvascular flow was decreased in DYS. Conclusion USE is sensitive to renal allograft dysfunction, which is characterized by reduced SWV and renal perfusion. USE has higher image resolution than MRE, while MRE has slightly better diagnostic accuracy.
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Affiliation(s)
| | - Jing Guo
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Michael Dürr
- Department of Nephrology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Timm Denecke
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Bernd Hamm
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Ingolf Sack
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Thomas Fischer
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
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902
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Su R, Xu G, Xiang L, Ding S, Wu R. A Novel Scoring System for Prediction of Prostate Cancer Based on Shear Wave Elastography and Clinical Parameters. Urology 2018; 121:112-117. [PMID: 30171925 DOI: 10.1016/j.urology.2018.08.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 07/31/2018] [Accepted: 08/21/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To develop a novel scoring system for the prediction of prostate cancer (PCa). METHODS We assessed 127 patients who underwent a prostate biopsy. Prior to biopsy, we performed shear wave elastography (SWE), transrectal ultrasound, digital rectal exam, total prostatic specific antigen, PSA density (PSAD), and free PSA/total PSA ratio (F/T). We developed an 11-point scoring system based on SWE and these clinical parameters. RESULTS PCa was diagnosed in 51 (40.2%) of 127 patients and 192 (25.2%) of 762 sextants on initial biopsy. ROC curve analyses showed that the cutoff value (COV) for SWE was 40.8 kpa at the sextant level. The AUC of score system based on the SWE and clinical parameters (0.911) was significantly different from scoring systems based on SWE alone (0.842) or clinical parameters alone (0.868). For this 11-point scoring system, the optimal COV, Youden index, sensitivity, specificity, PPV, NPV, and AUC were 3 points, 0.66, 76.5% 89.5%, 82.98%, 85.00%, and 0.911, respectively. There were 68 negative biopsy results in patients with 0-3 points, and the detection rate of PCa was 100% in patients with scores exceeding 6 points. CONCLUSION This 11-point scoring system based on SWE and clinical parameters has the good diagnostic performance for predicting PCa. It may be useful in selecting patients for biopsy, substantially reducing the number of unnecessary biopsies while ensuring that few cancers are missed.
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Affiliation(s)
- Rui Su
- Department of Medical Ultrasound, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Urology, Ningbo First Hospital, the Affiliated Hospital of Ningbo University, Ningbo, China
| | - Guang Xu
- Department of Medical Ultrasound, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Ultrasound Research and Education Institute, Tongji University School of Medicine, Shanghai, China
| | - Lihua Xiang
- Department of Medical Ultrasound, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Ultrasound Research and Education Institute, Tongji University School of Medicine, Shanghai, China
| | - Shisi Ding
- Department of Medical Ultrasound, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Ultrasound Research and Education Institute, Tongji University School of Medicine, Shanghai, China
| | - Rong Wu
- Department of Medical Ultrasound, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Ultrasound Research and Education Institute, Tongji University School of Medicine, Shanghai, China.
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903
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Effect of High-Induction Magnetic Stimulation on Elasticity of the Patellar Tendon. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2018:7172034. [PMID: 30154991 PMCID: PMC6093077 DOI: 10.1155/2018/7172034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 06/17/2018] [Accepted: 06/28/2018] [Indexed: 11/17/2022]
Abstract
Nowadays, a high-induction magnetic stimulation is starting to be increasingly applied as a biophysical stimulation in the conservative treatment of the degenerative locomotor system diseases. These are mainly in correlation with the changes in soft tissue elasticity, which should be positively influenced by the flow-induced electrical currents of high current density during high-induction magnetic stimulation. This assumption was verified within the interventional and prospective study using the ultrasound elastography. The group consisted of 6 volunteers, whose elasticity of the patellar tendons was measured using the 2D shear-wave ultrasound elastography. The volunteers were then exposed to a 20-minute high-induction magnetic stimulation session with a frequency of 20 Hz, in 2 s package intervals, with a 5 s pause, and a induced electric current density of 100 Am−2 in the tendons area. A tendon tension was measured five times for all volunteers, where mean tension at the marked area of the tendon, as well as the highest point tension indicated by the Q-Box, was monitored. The measurement results show that high-induction magnetic stimulation has an influence on the patellar tendon tension change, which occurred in the case of all involved volunteers when the patellar tension was decreased.
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904
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MacDonald C, Ross R, Houston JG. Shear wave velocity measurements of the brachial artery in a population with end-stage renal disease. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aad8a3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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905
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Prado-Costa R, Rebelo J, Monteiro-Barroso J, Preto AS. Ultrasound elastography: compression elastography and shear-wave elastography in the assessment of tendon injury. Insights Imaging 2018; 9:791-814. [PMID: 30120723 PMCID: PMC6206379 DOI: 10.1007/s13244-018-0642-1] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/22/2018] [Accepted: 06/21/2018] [Indexed: 12/27/2022] Open
Abstract
Ultrasound elastography (USE) is a recent technology that has experienced major developments in the past two decades. The assessment of the main mechanical properties of tissues can be made with this technology by characterisation of their response to stress. This article reviews the two major techniques used in musculoskeletal elastography, compression elastography (CE) and shear-wave elastography (SWE), and evaluates the studies published on major electronic databases that use both techniques in the context of tendon pathology. CE accounts for more studies than SWE. The mechanical properties of tendons, particularly their stiffness, may be altered in the presence of tendon injury. CE and SWE have already been used for the assessment of Achilles tendons, patellar tendon, quadriceps tendon, epicondylar tendons and rotator cuff tendons and muscles. Achilles tendinopathy is the most studied tendon injury with USE, including the postoperative period after surgical repair of Achilles rupture tendon. In relation to conventional ultrasound (US), USE potentially increases the sensitivity and diagnostic accuracy in tendinopathy, and can detect pathological changes before they are visible in conventional US imaging. Several technical limitations are recognised, and standardisation is necessary to ensure repeatability and comparability of the results when using these techniques. Still, USE is a promising technique under development and may be used not only to promote an early diagnosis, but also to identify the risk of injury and to support the evaluation of rehabilitation interventions. KEY POINTS: • USE is used for the assessment of the mechanical properties of tissues, including the tendons. • USE increases diagnostic performance when coupled to conventional US imaging modalities. • USE will be useful in early diagnosis, tracking outcomes and monitoring treatments of tendon injury. • Technical issues and lack of standardisation limits USE use in the assessment of tendon injury.
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Affiliation(s)
- Rui Prado-Costa
- Department of Physical and Rehabilitation Medicine, Centro Hospitalar São João, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - João Rebelo
- Department of Radiology, Centro Hospitalar São João, Porto, Portugal.
| | - João Monteiro-Barroso
- Department of Physical and Rehabilitation Medicine, Centro Hospitalar São João, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - Ana Sofia Preto
- Department of Radiology, Centro Hospitalar São João, Porto, Portugal
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906
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Hamstring stiffness pattern during contraction in healthy individuals: analysis by ultrasound-based shear wave elastography. Eur J Appl Physiol 2018; 118:2403-2415. [DOI: 10.1007/s00421-018-3967-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 08/06/2018] [Indexed: 11/25/2022]
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907
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Zhou JY, Wang YC, Zeng CH, Ju SH. Renal Functional MRI and Its Application. J Magn Reson Imaging 2018; 48:863-881. [PMID: 30102436 DOI: 10.1002/jmri.26180] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 04/10/2018] [Indexed: 12/11/2022] Open
Abstract
Renal function varies according to the nature and stage of diseases. Renal functional magnetic resonance imaging (fMRI), a technique considered superior to the most common method used to estimate the glomerular filtration rate, allows for noninvasive, accurate measurements of renal structures and functions in both animals and humans. It has become increasingly prevalent in research and clinical applications. In recent years, renal fMRI has developed rapidly with progress in MRI hardware and emerging postprocessing algorithms. Function-related imaging markers can be acquired via renal fMRI, encompassing water molecular diffusion, perfusion, and oxygenation. This review focuses on the progression and challenges of the main renal fMRI methods, including dynamic contrast-enhanced MRI, blood oxygen level-dependent MRI, diffusion-weighted imaging, diffusion tensor imaging, arterial spin labeling, fat fraction imaging, and their recent clinical applications. LEVEL OF EVIDENCE 5 Technical Efficacy: Stage 2 J. Magn. Reson. Imaging 2018;48:863-881.
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Affiliation(s)
- Jia-Ying Zhou
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
| | - Yuan-Cheng Wang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
| | - Chu-Hui Zeng
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
| | - Sheng-Hong Ju
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, China
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908
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Simultaneous magnetic resonance and optical elastography acquisitions: Comparison of displacement images and shear modulus estimations using a single vibration source. J Mech Behav Biomed Mater 2018; 84:135-144. [DOI: 10.1016/j.jmbbm.2018.05.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 05/05/2018] [Accepted: 05/07/2018] [Indexed: 01/22/2023]
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909
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Correlation between stress drop and applied strain as a biomarker for tumor detection. J Mech Behav Biomed Mater 2018; 86:450-462. [PMID: 30054237 DOI: 10.1016/j.jmbbm.2018.07.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/04/2018] [Accepted: 07/15/2018] [Indexed: 11/23/2022]
Abstract
This is the first study to measure the viscoelastic behavior of tumor tissues using stepwise compression-relaxation testing, and investigate the measured (Δσ-ε) relation between stress drop (Δσ) and applied strain (ε) as a biomarker for tumor detection. Stepwise compression-relaxation testing was implemented via a 2D tactile sensor to measure stress drop at each applied strain of a sample. Pearson correlation analysis was conducted to quantify the measured Δσ-ε relation as slope of stress drop versus applied strain (m=Δσ/ε) and coefficient of determination (R2). The measured results on soft materials revealed no dependency of coefficient of determination on the testing parameters and dependency of slope on them. Three groups of tissues: five mouse breast tumor (BT) tissues ex vivo, two mouse pancreatic tumor (PT) tissues in vivo and six normal tissues, were measured by using different testing parameters. Coefficient of determination was found to show significant difference among the center, edge and outside sites of all the BT tissues, and no difference between the BT outside sites and the normal tissues. Coefficient of determination also revealed significant difference between before and after treatment of the PT tissues, and no difference between the PT tissues after treatment and the normal tissues. Moreover, coefficient of determination of the PT tissues before treatment was found to be significantly different from that of the BT center sites, but slope failed to capture their difference. Dummy tumors made of silicon rubbers were found to behave differently from the native tumors. By removing the need of fitting the time-dependent data with a viscoelastic model, this study offered a time-efficient solution to quantifying the viscosity for tumor detection.
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910
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Venkatesh SK, Wells ML, Miller FH, Jhaveri KS, Silva AC, Taouli B, Ehman RL. Magnetic resonance elastography: beyond liver fibrosis-a case-based pictorial review. Abdom Radiol (NY) 2018; 43:1590-1611. [PMID: 29143076 PMCID: PMC6731769 DOI: 10.1007/s00261-017-1383-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Magnetic resonance elastography (MRE) has been introduced for clinical evaluation of liver fibrosis for nearly a decade. MRE has proven to be a robust and accurate technique for diagnosis and staging of liver fibrosis. As clinical experience with MRE grows, the possible role in evaluation of other diffuse and focal disorders of liver is emerging. Stiffness maps provide an opportunity to evaluate mechanical properties within a large volume of liver tissue. This enables appreciation of spatial heterogeneity of stiffness. Stiffness maps may reveal characteristic and differentiating features of chronic liver diseases and focal liver lesions and therefore provide useful information for clinical management. The objective of this pictorial review is to recapture the essentials of MRE technique and illustrate with examples, the utility of stiffness maps in other chronic liver disorders and focal liver lesions.
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Affiliation(s)
- Sudhakar K Venkatesh
- Department of Radiology, Mayo Clinic College of Medicine, Mayo Clinic, 200, First Street SW, Rochester, MN, 55905, USA.
| | - Michael L Wells
- Department of Radiology, Mayo Clinic College of Medicine, Mayo Clinic, 200, First Street SW, Rochester, MN, 55905, USA
| | - Frank H Miller
- Department of Radiology, Northwestern University, Chicago, IL, USA
| | - Kartik S Jhaveri
- Joint Department of Medical Imaging, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Alvin C Silva
- Department of Radiology, Mayo Clinic, Scottsdale, AZ, USA
| | - Bachir Taouli
- NYU Medical College, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Richard L Ehman
- Department of Radiology, Mayo Clinic College of Medicine, Mayo Clinic, 200, First Street SW, Rochester, MN, 55905, USA
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911
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Jiang H, Zheng T, Duan T, Chen J, Song B. Non-invasive in vivo Imaging Grading of Liver Fibrosis. J Clin Transl Hepatol 2018; 6:198-207. [PMID: 29951365 PMCID: PMC6018309 DOI: 10.14218/jcth.2017.00038] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 10/25/2017] [Accepted: 11/29/2017] [Indexed: 02/05/2023] Open
Abstract
Liver fibrosis (LF), a common consequence of chronic liver diseases with various etiologies, is characterized by excessive accumulation of macromolecules, including collagen, glycoproteins and proteoglycans, in the liver. LF can result in hepatic dysfunction, cirrhosis, portal hypertension and, in some cases, hepatocellular carcinoma. As the current gold standard for diagnosing LF, liver biopsy, however, is invasive and prone to sampling errors and procedure-related complications. Therefore, developing noninvasive, precise and reproducible imaging tests for diagnosing and staging LF is of great significance. Conventional ultrasound (US), computed tomography (CT) and magnetic resonance (MR) imaging can depict morphological alterations of advanced LF, but have relatively limited capability characterizing early-stage LF. In order to optimize the diagnostic performances of noninvasive imaging techniques for LF across its entire spectrum of severity, a number of novel methods, including US elastography, CT perfusion imaging and various MR imaging-based techniques, have been established and introduced to clinical practice. In this review, we intended to summarize current noninvasive imaging techniques for LF, with special emphasis on the possible roles, advantages and limitations of the new emerging imaging modalities.
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Affiliation(s)
- Hanyu Jiang
- Department of Radiology, Sichuan University West China Hospital, Chengdu, China
| | - Tianying Zheng
- Department of Radiology, Sichuan University West China Hospital, Chengdu, China
| | - Ting Duan
- Department of Radiology, Sichuan University West China Hospital, Chengdu, China
| | - Jie Chen
- Department of Radiology, Sichuan University West China Hospital, Chengdu, China
| | - Bin Song
- Department of Radiology, Sichuan University West China Hospital, Chengdu, China
- *Correspondence to: Bin Song, Department of Radiology, Sichuan University West China Hospital, No. 37 Guoxue Alley, Chengdu, Sichuan 610041, China. Tel: +86-28-85423680, +86-13881918066, E-mail:
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912
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Lee JM, Hwang JY, Bae J, Kim MR, Kim YW, Park SE, Yeom JA, Roh J. Acoustic radiation force impulse imaging of biopsy-proven Kikuchi disease: initial experiences for evaluating feasibility in pediatric patients. Ultrasonography 2018; 38:58-66. [PMID: 29914233 PMCID: PMC6323305 DOI: 10.14366/usg.17067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 04/24/2018] [Indexed: 12/13/2022] Open
Abstract
Purpose This study evaluated the feasibility of acoustic radiation force impulse (ARFI) elastography and characterized the sonographic features of lymph nodes (LNs) with Kikuchi disease in pediatric patients. Methods Seventy-six cervical LN biopsies were performed for the diagnosis of cervical lymphadenopathy. ARFI imaging was performed, and the characteristic ultrasound features of the biopsied LNs and the contralateral LNs were analyzed. We also reviewed clinical and conventional ultrasonographic findings. Results On histology, 56 patients were diagnosed with Kikuchi disease. These LNs were large and elongated, with increased perinodal echogenicity and capsular thickening. In 38 of them, ARFI elastography was performed, and the median shear wave velocity (SWV) of the biopsied LNs with Kikuchi disease (2.19 m/sec; range, 1.45 to 4.57 m/sec) was higher than of the contralateral LNs (1.72 m/sec; range, 0.95 to 2.65 m/sec; P<0.001). In patients with reactive hyperplasia, the mean SWV of the biopsied LNs (2.00 m/sec; range, 1.49 to 2.26 m/sec) was higher than that of the contralateral LNs (1.55 m/sec; range, 1.21 to 2.32 m/sec; P=0.031). Conclusion The SWV of LNs with Kikuchi disease was significantly higher than that of the contralateral LNs. Morphologically, LNs with Kikuchi disease showed an enlarged, elongated, and oval shape, increased perinodal echogenicity, and capsular thickening. In addition to the conventional ultrasonographic findings, the application of ARFI is feasible even in pediatric patients for the evaluation of cervical lymphadenopathy.
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Affiliation(s)
- Jeong-Min Lee
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jae-Yeon Hwang
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea.,Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jihyun Bae
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Mae Ran Kim
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Yong-Woo Kim
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Su Eun Park
- Department of Pediatrics, Pusan National University Children's Hospital, Yangsan, Korea
| | - Jeong A Yeom
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jieun Roh
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
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913
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Current Knowledge in Ultrasound-Based Liver Elastography of Pediatric Patients. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8060944] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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914
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Bedewi MA, Nissman D, Aldossary NM, Maetani TH, El Sharkawy MS, Koura H. Shear wave elastography of the brachial plexus roots at the interscalene groove. Neurol Res 2018; 40:805-810. [DOI: 10.1080/01616412.2018.1480922] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Mohamed Abdelmohsen Bedewi
- Radiology Department, College of Medicine, Prince Sattam bin Abdulaziz University, Al-kharj, Saudi Arabia
| | - Daniel Nissman
- Radiology Department, School of Medicine, University of North Carolina at Chapel Hill
| | - Nasser Mohammed Aldossary
- Radiology Department, College of Medicine, Prince Sattam bin Abdulaziz University, Al-kharj, Saudi Arabia
| | - Troy Hideo Maetani
- Radiology Department, School of Medicine, University of North Carolina at Chapel Hill
| | | | - Hussein Koura
- Radiology Department, College of Medicine, Prince Sattam bin Abdulaziz University, Al-kharj, Saudi Arabia
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915
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Cui A, Xu L, Mu J, Tong M, Peng C, Wu T. The role of shear wave elastography on evaluation of the rigidity changes of corpus cavernosum penis in venogenic erectile dysfunction. Eur J Radiol 2018; 103:1-5. [DOI: 10.1016/j.ejrad.2018.03.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/17/2018] [Accepted: 03/22/2018] [Indexed: 01/09/2023]
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916
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Ren X, Xia S, Ni Z, Zhan W, Zhou J. Analysis of three ultrasound elastography techniques for grading liver fibrosis in patients with chronic hepatitis B. Radiol Med 2018; 123:735-741. [DOI: 10.1007/s11547-018-0905-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 05/07/2018] [Indexed: 02/08/2023]
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917
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In silico simulation of liver crack detection using ultrasonic shear wave imaging. BMC Med Imaging 2018; 18:15. [PMID: 29769030 PMCID: PMC5956542 DOI: 10.1186/s12880-018-0249-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 04/16/2018] [Indexed: 12/31/2022] Open
Abstract
Background Liver trauma is an important source of morbidity and mortality worldwide. A timely detection and precise evaluation of traumatic liver injury and the bleeding site is necessary. There is a need to develop better imaging modalities of hepatic injuries to increase the sensitivity of ultrasonic imaging techniques for sites of hemorrhage caused by cracks. In this study, we conduct an in silico simulation of liver crack detection and delineation using an ultrasonic shear wave imaging (USWI) based method. Methods We simulate the generation and propagation of the shear wave in a liver tissue medium having a crack using COMSOL. Ultrasound radio frequency (RF) signal synthesis and the two-dimensional speckle tracking algorithm are applied to simulate USWI in a medium with randomly distributed scatterers. Crack detection is performed using the directional filter and the edge detection algorithm rather than the conventional inversion algorithm. Cracks with varied sizes and locations are studied with our method and the crack localization results are compared with the given crack. Results Our pilot simulation study shows that, by using USWI combined with a directional filter cum edge detection technique, the near-end edge of the crack can be detected in all the three cracks that we studied. The detection errors are within 5%. For a crack of 1.6 mm thickness, little shear wave can pass through it and the far-end edge of the crack cannot be detected. The detected crack lengths using USWI are all slightly shorter than the actual crack length. The robustness of our method in detecting a straight crack, a curved crack and a subtle crack of 0.5 mm thickness is demonstrated. Conclusions In this paper, we simulate the use of a USWI based method for the detection and delineation of the crack in liver. The in silico simulation helps to improve understanding and interpretation of USWI measurements in a physical scattered liver medium with a crack. This pilot study provides a basis for improved insights in future crack detection studies in a tissue phantom or liver.
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918
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Zhu J, Yu J, Qu Y, He Y, Li Y, Yang Q, Huo T, He X, Chen Z. Coaxial excitation longitudinal shear wave measurement for quantitative elasticity assessment using phase-resolved optical coherence elastography. OPTICS LETTERS 2018; 43:2388-2391. [PMID: 29762599 DOI: 10.1364/ol.43.002388] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Optical coherence elastography (OCE) is an emerging imaging modality for the assessment of mechanical properties in soft tissues. Transverse shear wave measurements using OCE can quantify the elastic moduli perpendicular to the force direction, however, missing the elastic information along the force direction. In this study, we developed coaxial excitation longitudinal shear wave measurements for quantification of elastic moduli along the force direction using M-scans. Incorporating Rayleigh wave measurements using non-coaxial lateral scans into longitudinal shear wave measurements, directionally dependent elastic properties can be quantified along the force direction and perpendicular to the force direction. Therefore, the reported system has the capability to image elasticity of anisotropic biological tissues.
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919
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Sutherland EL, Choromanska A, Al-Katib S, Coffey M. Outcomes of ultrasound guided renal mass biopsies. J Ultrasound 2018; 21:99-104. [PMID: 29696566 DOI: 10.1007/s40477-018-0299-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 02/06/2018] [Indexed: 01/20/2023] Open
Abstract
PURPOSE The purpose of this study was to evaluate the rate of nondiagnostic ultrasound-guided renal mass biopsies (RMBs) at our institution and to determine what patient, procedural, and focal renal mass (FRM) factors were associated with nondiagnostic ultrasound-guided RMBs. METHODS Eighty-two ultrasound-guided renal mass biopsies performed between January 2014 and October 2016 were included in our study. Biopsy outcomes (diagnostic vs. nondiagnostic) and patient, procedural, and FRM characteristics were retrospectively reviewed and recorded. Univariate statistical analyses were performed to identify biopsy characteristics that were indicative of nondiagnostic biopsy. RESULTS Ultrasound-guided RMBs were diagnostic in 70 out of 82 cases (85%) and non-diagnostic in 12 cases (15%). Among the diagnostic biopsies, 54 (77%) were malignant cases, 94% of which were renal cell carcinoma (RCC). Of the 12 nondiagnostic cases, the final diagnosis was RCC in 4 cases and angiomyolipoma in one case; seven of the nondiagnostic cases were lost to follow-up. A weak association (p = 0.04) was found between the number of needle passes and the biopsy outcome. None of the remaining collected RMB characteristics showed a significant correlation with a diagnostic or nondiagnostic RMB. Six patients (7%) experienced complications. CONCLUSION Ultrasound-guided renal mass biopsy is a safe and effective method for the diagnosis of renal masses with a low rate of nondiagnostic outcomes. A nondiagnostic biopsy should not be treated as a surrogate for a diagnosis since a significant number of patients with nondiagnostic biopsies have subsequently been shown to have renal malignancies. Repeat biopsy should be considered in such cases.
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Affiliation(s)
- Edward L Sutherland
- Department of Diagnostic Radiology, William Beaumont Hospital, 3601 W 13 Mile Rd, Royal Oak, MI, 48073, USA.
| | - Agnieszka Choromanska
- Department of Diagnostic Radiology, William Beaumont Hospital, 3601 W 13 Mile Rd, Royal Oak, MI, 48073, USA
| | - Sayf Al-Katib
- Department of Diagnostic Radiology, William Beaumont Hospital, 3601 W 13 Mile Rd, Royal Oak, MI, 48073, USA
| | - Mary Coffey
- Beaumont Health Research Institute, 3601 W 13 Mile Rd, Royal Oak, MI, 48073, USA
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920
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Ultrasound-Based Liver Stiffness Surveillance in Patients Treated for Chronic Hepatitis B or C. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8040626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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921
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Putz FJ, Hautmann MG, Banas MC, Jung EM. Investigation of the acute plantar fasciitis with contrast-enhanced ultrasound and shear wave elastography - first results. Clin Hemorheol Microcirc 2018; 67:415-423. [PMID: 28885209 DOI: 10.3233/ch-179222] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The plantar fasciitis is a common disease with a high prevalence in public and a frequent cause of heel pain. OBJECTIVE In our pilot study, we wanted to characterise the feasibility of shear-wave elastography and contrast-enhanced ultrasound (CEUS) in the assessment of the plantar fasciitis. METHODS 23 cases of painful heels were examined by B-Mode ultrasound, Power Doppler (PD), shear wave elastography and contrast-enhanced ultrasound before anti-inflammatory radiation. Time-intensity-curves were analysed by the integrated software. The results for area-under-the-curve (AUC), peak, time-to-peak (TTP) and mean-transit-time (MTT) were compared between the plantar fascia and the surrounding tissue. RESULTS All cases showed thickening of the plantar fascia, in most cases with interstitial oedema (87.0%). Shear wave elastography showed inhomogeneous stiffness of the plantar fascia. 83.3% of cases showed a visible hyperperfusion in CEUS at the proximal plantar fascia in comparison to the surrounding tissue. This hyperperfusion could also be found in 75.0% of cases with no signs of vascularisation in PD. AUC (p = 0.0005) and peak (p = 0.037) were significantely higher in the plantar fascia than in the surrounding tissue. CONCLUSION CEUS and shear wave elastography are new diagnostic tools in the assessment of plantar fasciitis and can provide quantitative parameters for monitoring therapy.
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Affiliation(s)
- Franz Josef Putz
- Department of Nephrology, University Hospital Regensburg, Regensburg, Germany
| | - Matthias G Hautmann
- Department of Radiotherapy, University Hospital Regensburg, Regensburg, Germany
| | - Miriam C Banas
- Department of Nephrology, University Hospital Regensburg, Regensburg, Germany
| | - Ernst Michael Jung
- Department of Radiology and Interdisciplinary Ultrasound, University Hospital Regensburg, Regensburg, Germany
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922
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Experience of Using Shear Wave Elastography Imaging in Superficial Venous Insufficiency of the Lower Extremity. Ultrasound Q 2018; 34:176-182. [PMID: 29634667 DOI: 10.1097/ruq.0000000000000356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We investigated the effectiveness of shear wave elastography (SWE) in patients with lower extremity superficial venous insufficiency (VI). A total of 138 symptomatic patients, 51 asymptomatic volunteers, and a total of 359 lower extremities (257 symptomatic, 102 asymptomatic) were examined. All participants underwent Doppler ultrasound (US) evaluation to determine VI and SWE measurements performed by manually drawing vein wall and perivenous tissue with free region of interest at the great saphenous vein (GSV) and small saphenous vein (SSV). The GSV, SSV diameter, VI, and volume flow of reflux were compared with the SWE values. The SWE values of the symptomatic group for GSV and SSV were significantly higher than those of the asymptomatic control group regardless of whether VI was detected by Doppler US (P < 0.001). There was a statistically significant increase in SWE values for the symptomatic group who were diagnosed as having reflux in GSV and SSV (P < 0.001). A significant positive correlation between increased GSV, SSV diameter, and SWE values was seen (P < 0.001). Venous insufficiency can be diagnosed with a 84.7% sensitivity and 84.2% specificity when 2655 m/s was designated as cutoff value, and with a 85.4% sensitivity and 84.2% specificity when 22,350 kPa was designated as the cutoff value in GSV. Venous insufficiency can be diagnosed with a 84.3% sensitivity and 82.4% specificity when 2845 m/s was designated as cutoff value, and with a 85.7% sensitivity and 84.4% specificity when 27,100 kPa was designated as the cutoff value in SSV. Shear wave elastography may be used effectively in addition to conventional Doppler US examination in diagnosing and following VI.
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923
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Brattain LJ, Telfer BA, Dhyani M, Grajo JR, Samir AE. Machine learning for medical ultrasound: status, methods, and future opportunities. Abdom Radiol (NY) 2018; 43:786-799. [PMID: 29492605 PMCID: PMC5886811 DOI: 10.1007/s00261-018-1517-0] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Ultrasound (US) imaging is the most commonly performed cross-sectional diagnostic imaging modality in the practice of medicine. It is low-cost, non-ionizing, portable, and capable of real-time image acquisition and display. US is a rapidly evolving technology with significant challenges and opportunities. Challenges include high inter- and intra-operator variability and limited image quality control. Tremendous opportunities have arisen in the last decade as a result of exponential growth in available computational power coupled with progressive miniaturization of US devices. As US devices become smaller, enhanced computational capability can contribute significantly to decreasing variability through advanced image processing. In this paper, we review leading machine learning (ML) approaches and research directions in US, with an emphasis on recent ML advances. We also present our outlook on future opportunities for ML techniques to further improve clinical workflow and US-based disease diagnosis and characterization.
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Affiliation(s)
| | - Brian A Telfer
- MIT Lincoln Laboratory, 244 Wood St, Lexington, MA, 02420, USA
| | - Manish Dhyani
- Department of Internal Medicine, Steward Carney Hospital, Boston, MA, 02124, USA
- Division of Ultrasound, Department of Radiology, Center for Ultrasound Research & Translation, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - Joseph R Grajo
- Department of Radiology, Division of Abdominal Imaging, University of Florida College of Medicine, Gainesville, FL, USA
| | - Anthony E Samir
- Division of Ultrasound, Department of Radiology, Center for Ultrasound Research & Translation, Massachusetts General Hospital, Boston, MA, 02114, USA
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924
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Abstract
Tissue stiffness has long been known to be a biomarker of tissue pathology. Ultrasound elastography measures tissue mechanical properties by monitoring the response of tissue to acoustic energy. Different elastographic techniques have been applied to many different tissues and diseases. Depending on the pathology, patient-based factors, and ultrasound operator-based factors, these techniques vary in accuracy and reliability. In this review, we discuss the physical principles of ultrasound elastography, discuss differences between different ultrasound elastographic techniques, and review the advantages and disadvantages of these techniques in clinical practice.
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Affiliation(s)
- Arinc Ozturk
- Center for Ultrasound Research & Translation, Department of Radiology, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - Joseph R Grajo
- Department of Radiology, Division of Abdominal Imaging, University of Florida College of Medicine, Gainesville, FL, USA
| | - Manish Dhyani
- Center for Ultrasound Research & Translation, Department of Radiology, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - Brian W Anthony
- Device Realization and Computational Instrumentation Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Anthony E Samir
- Center for Ultrasound Research & Translation, Department of Radiology, Massachusetts General Hospital, Boston, MA, 02114, USA.
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925
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The Mechanical Characterisation of Bovine Embolus Analogues Under Various Loading Conditions. Cardiovasc Eng Technol 2018; 9:489-502. [DOI: 10.1007/s13239-018-0352-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 03/22/2018] [Indexed: 10/17/2022]
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926
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Yang Y, Wang L, Yan F, Xiang X, Tang Y, Zhang L, Liu J, Qiu L. Determination of Normal Skin Elasticity by Using Real-time Shear Wave Elastography. JOURNAL OF ULTRASOUND IN MEDICINE 2018; 37:2507-2516. [PMID: 29575120 DOI: 10.1002/jum.14608] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/05/2018] [Accepted: 01/25/2018] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To define the reference ranges of normal skin elasticity measurements associated with shear wave elastography (SWE) in healthy volunteers and analyze the factors that may affect SWE. METHODS Mean skin thickness and elastic modulus values from 90 healthy volunteers were evaluated with B-mode ultrasonography and SWE in the right fingers and forearms, anterior chest, and abdominal walls. Reference ranges of normal skin elasticity were calculated by using lower and upper limits at the 2.5th and 97.5th percentiles. To investigate the effects of potential factors (site, sex, age, body mass index, and skin thickness) on skin elasticity measurements, a 1-way analysis of variance, the Student t test, and the Pearson correlation test were performed. RESULTS Skin elasticity was significantly different at different sites (P < .05). Mean elastic modulus values were 30.3 kPa for the finger, 14.8 kPa for the forearm, 17.8 kPa for the chest wall, and 9.5 kPa for the abdominal wall, and reference ranges of normal skin elasticity were 12.1 to 48.4kPa for the finger, 3.5 to 26.0 kPa for the forearm, 6.6 to 28.9 kPa for the chest wall, and 3.5 to 15.5 kPa for the abdominal wall. Our study revealed that men had higher skin elasticity measurements than women (P < .05), and they were more elevated in participants aged 20 to 50 years than in the other groups at the finger (P < .05). The body mass index and skin thickness had a negligible impact on skin elasticity measurements (P > .05). CONCLUSIONS This study revealed that the site, sex, and age should be taken into account when determining the reference ranges of normal skin elasticity by skin elasticity measurements.
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Affiliation(s)
- Yujia Yang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Liyun Wang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Feng Yan
- Department of Clinical Ultrasound Imaging Drug Research Laboratory, West China Hospital of Sichuan University, Chengdu, China
| | - Xi Xiang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Yuanjiao Tang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Lingyan Zhang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Jibin Liu
- Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - Li Qiu
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
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927
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Long Z, Tradup DJ, Song P, Stekel SF, Chen S, Glazebrook KN, Hangiandreou NJ. Clinical acceptance testing and scanner comparison of ultrasound shear wave elastography. J Appl Clin Med Phys 2018. [PMID: 29542277 PMCID: PMC5978380 DOI: 10.1002/acm2.12310] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Because of the rapidly growing use of ultrasound shear wave elastography (SWE) in clinical practices, there is a significant need for development of clinical physics performance assessment methods for this technology. This study aims to report two clinical medical physicists’ tasks: (a) acceptance testing (AT) of SWE function on ten commercial ultrasound systems for clinical liver application and (b) comparison of SWE measurements of targets across vendors for clinical musculoskeletal application. For AT, ten GE LOGIQ E9 XDclear 2.0 scanners with ten C1‐6‐D and ten 9L‐D transducers were studied using two commercial homogenous phantoms. Five measurements were acquired at two depths for each scanner/transducer pair by two operators. Additional tests were performed to access effects of different coupling media, phantom locations and operators. System deviations were less than 5% of group mean or three times standard deviation; therefore, all systems passed AT. A test protocol was provided based on results that no statistically significant difference was observed between using ultrasound gel and salt water for coupling, among different phantom locations, and that interoperator and intraoperator coefficient of variation was less than 3%. For SWE target measurements, two systems were compared — a Supersonic Aixplorer scanner with a SL10‐2 and a SL15‐4 transducer, and an abovementioned GE scanner with 9L‐D transducer. Two stepped cylinders with diameters of 4.05–10.40 mm were measured both longitudinally and transaxially. Target shear wave speed quantification was performed using an in‐house MATLAB program. Using the target shear wave speed deduced from phantom specs as a reference, SL15‐4 performed the best at the measured depth. However, it was challenging to reliably measure a 4.05 mm target for either system. The reported test methods and results could provide important information when dealing with SWE‐related tasks in the clinical environment.
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Affiliation(s)
- Zaiyang Long
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | | | - Pengfei Song
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Scott F Stekel
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Shigao Chen
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
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928
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Wang F, Chang C, Chen M, Gao Y, Chen YL, Zhou SC, Li JW, Zhi WX. Does Lesion Size Affect the Value of Shear Wave Elastography for Differentiating Between Benign and Malignant Thyroid Nodules? JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2018; 37:601-609. [PMID: 28906009 DOI: 10.1002/jum.14367] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 05/31/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVES We aimed to investigate the diagnostic performance of shear wave elastography (SWE) combined with conventional ultrasonography (US) for differentiating between benign and malignant thyroid nodules of different sizes. METHODS A total of 445 thyroid nodules from 445 patients were divided into 3 groups based on diameter (group 1, ≤ 10 mm; group 2, 10-20 mm; and group 3, > 20 mm). The mean elasticity index of the whole lesion was automatically calculated, and the threshold for differentiation between benign and malignant nodules was constructed by a receiver operating characteristic curve analysis. Diagnostic performances of conventional US and SWE were compared by using pathologic results as reference standards. RESULTS The mean elasticity was significantly higher in malignant versus benign nodules for all size groups. The differences in mean elasticity in the size groups were not statistically significant for malignant or benign nodules. The specificity of US combined with SWE for group 1 was significantly higher than that for groups 2 and 3 (77.8% versus 62.9% and 53.3%; P < .05), and compared with group 1, the sensitivity was significantly higher for groups 2 and 3 (92.4% and 94.3% versus 80.7%; P < .05). When SWE was added, the specificity increased and the sensitivity and diagnostic accuracy decreased for group 1, and the sensitivity increased and the specificity decreased for groups 2 and 3; however, the differences were not significant. CONCLUSIONS Combined with SWE, US yielded higher specificity for nodules of 10 mm and smaller and higher sensitivity for nodules larger than 10 mm.
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Affiliation(s)
- Fen Wang
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Cai Chang
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Min Chen
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yi Gao
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ya-Ling Chen
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Shi-Chong Zhou
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jia-Wei Li
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wen-Xiang Zhi
- Departments of Ultrasonography and Oncology, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
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929
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Gillies D, Gamal W, Downes A, Reinwald Y, Yang Y, El Haj AJ, Bagnaninchi PO. Real-time and non-invasive measurements of cell mechanical behaviour with optical coherence phase microscopy. Methods 2018; 136:126-133. [PMID: 29080739 DOI: 10.1016/j.ymeth.2017.10.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/12/2017] [Accepted: 10/17/2017] [Indexed: 12/22/2022] Open
Abstract
Cell mechanical behaviour is increasingly recognised as a central biophysical parameter in cancer and stem cell research, and methods of investigating their mechanical behaviour are therefore needed. We have developed a novel qualitative method based on quantitative phase imaging which is capable of investigating cell mechanical behaviour in real-time at cellular resolution using optical coherence phase microscopy (OCPM), and stimulating the cells non-invasively using hydrostatic pressure. The method was exemplified to distinguish between cells with distinct mechanical properties, and transient change induced by Cytochalasin D. We showed the potential of quantitative phase imaging to detect nanoscale intracellular displacement induced by varying hydrostatic pressure in microfluidic channels, reflecting cell mechanical behaviour. Further physical modelling is required to yield quantitative mechanical properties.
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Affiliation(s)
- D Gillies
- MRC Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, EH16 4UU, UK; Institute for Bioengineering, School of Engineering, The University of Edinburgh, Edinburgh, EH9 3DW, UK
| | - W Gamal
- MRC Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - A Downes
- Institute for Bioengineering, School of Engineering, The University of Edinburgh, Edinburgh, EH9 3DW, UK
| | - Y Reinwald
- Institute for Science and Technology in Medicine, Keele University, Keele, ST4 7QB, UK
| | - Y Yang
- Institute for Science and Technology in Medicine, Keele University, Keele, ST4 7QB, UK
| | - A J El Haj
- Institute for Science and Technology in Medicine, Keele University, Keele, ST4 7QB, UK
| | - P O Bagnaninchi
- MRC Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, EH16 4UU, UK.
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930
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Mancini M, Summers P, Faita F, Brunetto MR, Callea F, De Nicola A, Di Lascio N, Farinati F, Gastaldelli A, Gridelli B, Mirabelli P, Neri E, Salvadori PA, Rebelos E, Tiribelli C, Valenti L, Salvatore M, Bonino F. Digital liver biopsy: Bio-imaging of fatty liver for translational and clinical research. World J Hepatol 2018; 10:231-245. [PMID: 29527259 PMCID: PMC5838442 DOI: 10.4254/wjh.v10.i2.231] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 01/27/2018] [Accepted: 02/25/2018] [Indexed: 02/06/2023] Open
Abstract
The rapidly growing field of functional, molecular and structural bio-imaging is providing an extraordinary new opportunity to overcome the limits of invasive liver biopsy and introduce a "digital biopsy" for in vivo study of liver pathophysiology. To foster the application of bio-imaging in clinical and translational research, there is a need to standardize the methods of both acquisition and the storage of the bio-images of the liver. It can be hoped that the combination of digital, liquid and histologic liver biopsies will provide an innovative synergistic tri-dimensional approach to identifying new aetiologies, diagnostic and prognostic biomarkers and therapeutic targets for the optimization of personalized therapy of liver diseases and liver cancer. A group of experts of different disciplines (Special Interest Group for Personalized Hepatology of the Italian Association for the Study of the Liver, Institute for Biostructures and Bio-imaging of the National Research Council and Bio-banking and Biomolecular Resources Research Infrastructure) discussed criteria, methods and guidelines for facilitating the requisite application of data collection. This manuscript provides a multi-Author review of the issue with special focus on fatty liver.
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Affiliation(s)
- Marcello Mancini
- Institute of Biostructure and Bioimaging, National Research Council, Naples 80145, Italy
| | - Paul Summers
- European Institute of Oncology (IEO) IRCCS, Milan 20141, Italy
| | - Francesco Faita
- Institute of Clinical Physiology (IFC), National Research Council (CNR), Pisa 56124, Italy
| | - Maurizia R Brunetto
- Hepatology Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Pisa 56125, Italy
| | - Francesco Callea
- Department of Pathology, Children Hospital Bambino Gesù IRCCS, Rome 00165, Italy
| | | | - Nicole Di Lascio
- Institute of Clinical Physiology (IFC), National Research Council (CNR), Pisa 56124, Italy
| | - Fabio Farinati
- Department of Gastroenterology, Oncology and Surgical Sciences, University of Padua, Padua 35121, Italy
| | - Amalia Gastaldelli
- Cardio-metabolic Risk Laboratory, Institute of Clinical Physiology (IFC), National Research Council (CNR), Pisa 56124, Italy
| | - Bruno Gridelli
- Institute for Health, University of Pittsburgh Medical Center (UPMC), Chianciano Terme 53042, Italy
| | | | - Emanuele Neri
- Diagnostic Radiology 3, Department of Translational Research, University of Pisa and "Ospedale S. Chiara" AOUP, Pisa 56126, Italy
| | - Piero A Salvadori
- Institute of Clinical Physiology (IFC), National Research Council (CNR), Pisa 56124, Italy
| | - Eleni Rebelos
- Hepatology Unit, Department of Clinical and Experimental Medicine, University Hospital of Pisa, Pisa 56125, Italy
| | - Claudio Tiribelli
- Fondazione Italiana Fegato (FIF), Area Science Park, Campus Basovizza, Trieste 34012, Italy
| | - Luca Valenti
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano and Department of Internal Medicine and Metabolic Diseases, Fondazione IRCCS Ca' Granda Ospedale Policlinico, Milan 20122, Italy
| | | | - Ferruccio Bonino
- Institute of Biostructure and Bioimaging, National Research Council, Naples 80145, Italy
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931
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Effect of HCV Core Antigen and RNA Clearance during Therapy with Direct Acting Antivirals on Hepatic Stiffness Measured with Shear Wave Elastography in Patients with Chronic Viral Hepatitis C. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8020198] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
To assess a combination of novel measures of therapeutic success in the treatment of chronic hepatitis C (CHC) infection, we evaluated liver stiffness (LS) with shear wave elastography and hepatitis C virus core antigen (HCVcAg) concentrations. We followed 34 patients during and after treatment with direct acting antivirals. All patients achieved a sustained virologic and serologic response and a significant increase of albumin levels. Decreases of alanine aminotransferase (ALT) activity and alpha-fetoprotein (AFP) level were observed during the treatment and follow-up period. A significant decrease in LS was observed between baseline, end of treatment (EOT), and at 24- and 96-week post-treatment follow-up. LS decline between EOT and 96-week follow-up (FU96) was observed in 79% of patients. Significant LS changes were seen in patients with advanced fibrosis, particularly in cirrhotics and in patients with ALT exceeding 100 IU/mL. There was a positive correlation between ALT activity and LS changes at the baseline versus FU96. A negative correlation was demonstrated between individual HCVcAg baseline concentrations and reduction of LS at the baseline versus FU96. In conclusion, we observed that LS significantly declined during and after antiviral treatment. It was accompanied by improvement in some liver function measures, and disappearance of both HCVcAg and HCV ribonucleic acid (HCV RNA).
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932
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Chen SH, Lai HC, Chiang IP, Su WP, Lin CH, Kao JT, Chuang PH, Hsu WF, Wang HW, Chen HY, Huang GT, Peng CY. Changes in liver stiffness measurement using acoustic radiation force impulse elastography after antiviral therapy in patients with chronic hepatitis C. PLoS One 2018; 13:e0190455. [PMID: 29293628 PMCID: PMC5749809 DOI: 10.1371/journal.pone.0190455] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 12/14/2017] [Indexed: 12/31/2022] Open
Abstract
Background To compare on-treatment and off-treatment parameters acquired using acoustic radiation force impulse elastography, the Fibrosis-4 (FIB-4) index, and aspartate aminotransferase-to-platelet ratio index (APRI) in patients with chronic hepatitis C (CHC). Methods Patients received therapies based on pegylated interferon or direct-acting antiviral agents. The changes in paired patient parameters, including liver stiffness (LS) values, the FIB-4 index, and APRI, from baseline to sustained virologic response (SVR) visit (24 weeks after the end of treatment) were compared. Multiple regression models were used to identify significant factors that explained the correlations with LS, FIB-4, and APRI values and SVR. Results A total of 256 patients were included, of which 219 (85.5%) achieved SVR. The paired LS values declined significantly from baseline to SVR visit in all groups and subgroups except the nonresponder subgroup (n = 10). Body mass index (P = 0.0062) and baseline LS (P < 0.0001) were identified as independent factors that explained the LS declines. Likewise, the baseline FIB-4 (P < 0.0001) and APRI (P < 0.0001) values independently explained the declines in the FIB-4 index and APRI, respectively. Moreover, interleukin-28B polymorphisms, baseline LS, and rapid virologic response were identified as independent correlates with SVR. Conclusions Paired LS measurements in patients treated for CHC exhibited significant declines comparable to those in FIB-4 and APRI values. These declines may have correlated with the resolution of necroinflammation. Baseline LS values predicted SVR.
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Affiliation(s)
- Sheng-Hung Chen
- Graduate Institute of Clinical Medical Science, School of Medicine, China Medical University, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Hsueh-Chou Lai
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
- College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - I-Ping Chiang
- Department of Pathology, China Medical University Hospital, Taichung, Taiwan
| | - Wen-Pang Su
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Chia-Hsin Lin
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Jung-Ta Kao
- School of Medicine, China Medical University, Taichung, Taiwan
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Po-Heng Chuang
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Wei-Fan Hsu
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Hung-Wei Wang
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Hung-Yao Chen
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Guan-Tarn Huang
- School of Medicine, China Medical University, Taichung, Taiwan
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Cheng-Yuan Peng
- School of Medicine, China Medical University, Taichung, Taiwan
- Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
- * E-mail:
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933
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Pacella CM. Image-guided thermal ablation of benign thyroid nodules. J Ultrasound 2017; 20:347-349. [PMID: 29204241 DOI: 10.1007/s40477-017-0269-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 10/28/2017] [Indexed: 01/20/2023] Open
Abstract
Purpose To clarify some relevant and significant inconsistencies and inaccuracies in review by Mainini et al. entitled "Image-guided thermal ablation of benign thyroid nodules" published in Journal of Ultrasound to avoid giving incorrect information to the reader and prevent that operators make wrong choices in the use of various devices and technologies available. Results Total cases treated with radiofrequency would be 2388 and not 2435 as reported in Table 1 of this review. The major, minor complications, and side effects in the partial group treated with laser technique and reported in this review are actually 1.2, 3.8, and 35.4%, respectively. In series of patients treated with laser ablation, including a total of 2345 patients, major and minor complications are 0.7 and 1.4%, respectively. The major complications of laser technology are less severe than RFA. Conclusions Several points regarding the paper by Mainini et al. need to be discussed, and I advocate authors for replying to my considerations to clarify the issues raised.
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Affiliation(s)
- Claudio M Pacella
- Department of Diagnostic Imaging and Interventional Radiology, Regina Apostolorum Hospital, Albano Laziale, 00041 Rome, Italy
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934
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Ahmed R, Wolfe K, Acher P, Liyanage S. Multiparametric ultrasound findings of tuberculous orchitis following bacillus Calmette-Guérin therapy. Radiol Case Rep 2017; 12:746-751. [PMID: 29484062 PMCID: PMC5823296 DOI: 10.1016/j.radcr.2017.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 07/28/2017] [Accepted: 08/08/2017] [Indexed: 12/28/2022] Open
Abstract
Granulomatous bacillus Calmette-Guérin (BCG) infection, both localized and disseminated, as a complication of intravesical therapy for transitional cell carcinoma of the bladder is a recognized but highly unusual phenomenon. We report the case of an 89-year-old gentleman with a history of bladder transitional cell carcinoma and subsequent intravesical BCG instillation of the bladder who presented to his general practitioner with a non-tender lump in his left testis. Histopathologic and microbiological evaluation of the subsequent orchidectomy specimen revealed granuloma formation secondary to BCG infection. The use of bubble contrast agents and elastography in ultrasound to evaluate focal testicular lesions is a relatively novel concept, and we aim to highlight the imaging features of testicular BCG infection using these techniques.
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Affiliation(s)
- Rumman Ahmed
- Department of Histopathology, Southend University Hospital, Essex, UK
| | - Konrad Wolfe
- Department of Urology, Southend University Hospital, Essex, UK
| | - Peter Acher
- Department of Radiology, Southend University Hospital, Essex, UK
| | - Sidath Liyanage
- Department of Histopathology, Southend University Hospital, Essex, UK
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