1
|
CT Volumetry of Convoluted Objects-A Simple Method Using Volume Averaging. ACTA ACUST UNITED AC 2021; 7:120-129. [PMID: 33924342 PMCID: PMC8167628 DOI: 10.3390/tomography7020011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 03/31/2021] [Accepted: 04/08/2021] [Indexed: 11/17/2022]
Abstract
Accurate measurement of object volumes using computed tomography is often important but can be challenging, especially for finely convoluted objects with severe marginal blurring from volume averaging. We aimed to test the accuracy of a simple method for volumetry by constructing, scanning and analyzing a phantom object with these characteristics which consisted of a cluster of small lucite beads embedded in petroleum jelly. Our method involves drawing simple regions of interest containing the entirety of the object and a portion of the surrounding material and using its density, along with the densities of pure lucite and petroleum jelly and the slice thickness to calculate the volume of the object in each slice. Comparison of our results with the object’s true volume showed the technique to be highly accurate, irrespective of slice thickness, image noise, reconstruction planes, spatial resolution and variations in regions of interest. We conclude that the method can be easily used for accurate volumetry in clinical and research scans without the need for specialized volumetry computer programs.
Collapse
|
2
|
Duan T, Jiang H, Xia C, Chen J, Cao L, Ye Z, Wei Y, Song B, Lee JM. Assessing Liver Function in Liver Tumors Patients: The Performance of T1 Mapping and Residual Liver Volume on Gd-EOBDTPA-Enhanced MRI. Front Med (Lausanne) 2020; 7:215. [PMID: 32549039 PMCID: PMC7270171 DOI: 10.3389/fmed.2020.00215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 04/29/2020] [Indexed: 02/05/2023] Open
Abstract
Purpose: To assess the performance of T1 mapping and residual liver volume (RLV) on Gd-EOBDTPA-enhanced MRI in pretreatment estimation of liver function in patients with liver tumors. Indocyanine green retention rate at 15 min (ICG R-15) was used as a reference standard. Methods: Ethical approval from the institutional review board and informed consent were obtained for this prospective study. We enrolled 155 patients with liver tumors who underwent pretreatment Gd-EOB-DTPA-enhanced MRI. T1 relaxation time before (T1-pre), 20 min after (T1-post) Gd-EOB-DTPA injection and RLV were measured. The absolute reduction (ΔT1) and reduction rate (ΔT1%) of T1 relaxation time, volume-assisted ΔT1 (ΔT1*RLV) and volume-assisted ΔT1% (ΔT1%*RLV) were calculated accordingly. The correlation of MR parameters with ICG R-15 was determined using Spearman's rank correlation analysis. Patients were classified into the normal liver function (NLF) group if their ICG R-15 levels were <10% or otherwise into the abnormal liver function (ALF) group. Receiver operating characteristic (ROC) analysis was conducted to evaluate the performances of the MR parameters in predicting ALF. Results: T1-post (r = 0.472, P < 0.001), ΔT1 (r = -0.355, P = 0.011), ΔT1% (r = -0.482, P < 0.001), RLV (r = -0.336, P < 0.001), volume-assisted ΔT1 (r = -0.458, P < 0.001) and volume-assisted ΔT1% (r = -0.522, P < 0.001) showed weak to moderate correlation with ICG R-15. The area under the ROC curves (AUROC) of volume-assisted ΔT1 in predicting ALF was 0.777, which was significantly higher than the other parameters (P < 0.05 for all). Conclusions: Combined T1 mapping and RLV on Gd-EOB-DTPA-enhanced MRI can help assess liver function with good diagnostic accuracy in patients with liver tumors before treatment.
Collapse
Affiliation(s)
- Ting Duan
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | - Hanyu Jiang
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | - Chunchao Xia
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | - Jie Chen
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | - Likunn Cao
- Department of Radiology, Peking Union Medical University Hospital, Peking, China
| | - Zheng Ye
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Wei
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | - Bin Song
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Bin Song
| | - Jeong Min Lee
- Department of Radiology, College of Medicine, Seoul National University, Seoul, South Korea
| |
Collapse
|
3
|
He YB, Bai L, Aji T, Jiang Y, Zhao JM, Zhang JH, Shao YM, Liu WY, Wen H. Application of 3D reconstruction for surgical treatment of hepatic alveolar echinococcosis. World J Gastroenterol 2015; 21:10200-10207. [PMID: 26401085 PMCID: PMC4572801 DOI: 10.3748/wjg.v21.i35.10200] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 05/29/2015] [Accepted: 07/18/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the reliability and accuracy of three-dimensional (3D) reconstruction for liver resection in patients with hepatic alveolar echinococcosis (HAE).
METHODS: One-hundred and six consecutive patients with HAE underwent hepatectomy at our hospital between May 2011 and January 2015. Fifty-nine patients underwent preoperative 3D reconstruction and “virtual” 3D liver resection before surgery (Group A). Another 47 patients used conventional imaging methods for preoperative assessment (Group B). Outcomes of hepatectomy were compared between the two groups.
RESULTS: There was no significant difference in preoperative data between the two groups. Compared with patients in Group B, those in Group A had a significantly shorter operation time (227.1 ± 51.4 vs 304.6 ± 88.1 min; P < 0.05), less intraoperative blood loss (308.1 ± 135.4 vs 458.1 ± 175.4 mL; P < 0.05), and lower requirement for intraoperative blood transfusion (186.4 ± 169.6 vs 289.4 ± 199.2 mL; P < 0.05). Estimated resection liver volumes in both groups had good correlation with actual graft weight (Group A: r = 0.978; Group B: r = 0.960). There was a significant higher serum level of albumin in Group A (26.3 ± 5.9 vs 22.6 ± 4.3 g/L, P < 0.05). Other postoperative laboratory parameters (serum levels of aminotransferase and bilirubin; prothrombin time) and duration of postoperative hospital stay were similar. Sixteen complications occurred in Group A and 19 in Group B. All patients were followed for 3-46 (mean, 17.3) mo. There was no recurrence of lesions in Group A, but two recurrences in Group B. There were three deaths: two from cerebrovascular accident, and one from car accident.
CONCLUSION: 3D reconstruction provides comprehensive and precise anatomical information for the liver. It also improves the chance of success and reduces the risk of hepatectomy in HAE.
Collapse
|
4
|
Li L, Tao Y, Tang J, Chen Q, Yang Y, Feng Z, Chen Y, Yang L, Yang Y, Zhu G, Feng H, Chen Z. A Cannabinoid Receptor 2 Agonist Prevents Thrombin-Induced Blood-Brain Barrier Damage via the Inhibition of Microglial Activation and Matrix Metalloproteinase Expression in Rats. Transl Stroke Res 2015; 6:467-77. [PMID: 26376816 DOI: 10.1007/s12975-015-0425-7] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 08/31/2015] [Accepted: 09/02/2015] [Indexed: 11/26/2022]
Abstract
Thrombin mediates the life-threatening cerebral edema and blood-brain barrier (BBB) damage that occurs after intracerebral hemorrhage (ICH). We previously found that the selective cannabinoid receptor 2 (CB2R) agonist JWH-133 reduced brain edema and neurological deficits following germinal matrix hemorrhage (GMH). We explored whether CB2R stimulation ameliorated thrombin-induced brain edema and BBB permeability as well as the possible molecular mechanism involved. A total of 144 Sprague-Dawley (S-D) rats received a thrombin (20 U) injection in the right basal ganglia. JWH-133 (1.5 mg/kg) or SR-144528 (3.0 mg/kg) and vehicle were intraperitoneally (i.p.) injected 1 h after surgery. Brain water content measurement, Evans blue (EB) extravasation, Western blot, and immunofluorescence were used to study the effects of a CB2R agonist 24 h after surgery. The results demonstrated that JWH-133 administration significantly decreased thrombin-induced brain edema and reduced the number of Iba-1-positive microglia. JWH-133 also decreased the number of P44/P42(+)/Iba-1(+) microglia, lowered Evans blue extravasation, and inhibited the elevated matrix metallopeptidase (MMP)-9 and matrix metallopeptidase (MMP)-12 activities. However, a selective CB2R antagonist (SR-144528) reversed these effects. We demonstrated that CB2R stimulation reduced thrombin-induced brain edema and alleviated BBB damage. We also found that matrix metalloproteinase suppression may be partially involved in these processes.
Collapse
Affiliation(s)
- Lin Li
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Yihao Tao
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Jun Tang
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Qianwei Chen
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Yang Yang
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Zhou Feng
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Yujie Chen
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Liming Yang
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Yunfeng Yang
- Department of Neurosurgery, Sichuan Provincial Corps Hospital, Chinese People's Armed Police Forces, Leshan, People's Republic of China
| | - Gang Zhu
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Hua Feng
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China
| | - Zhi Chen
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, No. 30, Gaotanyan Street, Chongqing, 400038, People's Republic of China.
| |
Collapse
|
5
|
Long-Term Outcome After Resection of Huge Hepatocellular Carcinoma ≥10 cm: Single-Institution Experience with 471 Patients. World J Surg 2015; 39:2519-28. [DOI: 10.1007/s00268-015-3129-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
6
|
Wang LM, An SL, Wu JX. Diagnosis and therapy of primary hepatic neuroendocrine carcinoma: clinical analysis of 10 cases. Asian Pac J Cancer Prev 2015; 15:2541-6. [PMID: 24761861 DOI: 10.7314/apjcp.2014.15.6.2541] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Primary hepatic neuroendocrine carcinoma (PHNEC) is rarer than extrahepatic gastrointestinal neuroendocrine carcinoma (NEC). It is difficult to make a correct diagnosis and poses a challenge for management. MATERIALS AND METHODS Ten PHNEC patients were admitted to our hospital from June 2006 to June 2011. Laboratory tests and imaging scans were performed for diagnosis and exclusion of extrahepatic NEC. All patients were AFP - and CA199- . Seven patients had solid tumors with cystic changes on ultrasonography, CT and/or MRI. For the initial treatment, four patients received combined-therapy and six monotherapy. Considering overall treatment, six patients received combined-therapy and four patients monotherapy. Staging criteria of primary hepatocellular carcinoma (PHC, AJCC 7th edition) were used to differentiate the stage of all patients: 3 patients were stage I, 2 stage II, 4 patients stage III and 1 stage IV. All patients were followed up and clinical data were gathered. RESULTS The median follow-up duration was 38.5 months. The 1-year, 2-year, 3-year and 6-year disease-free survival was 80.0%, 46.2% and 46.2% and 0% respectively. The overall survival rates were 100%, 67.1%, 67.1% and 33.6% respectively. Patients in early-stages (I/II) had similar disease-free and overall survival as those in advanced-stages (III/IV). Patients with monotherapy had significant shorter disease-free and overall survival than the patients with combination-therapy. CONCLUSIONS PHNEC has a unique specificity during its occurrence and development. The staging criteria of PHC might not be suitable for the PHENT. More convenient and effective features need to be found in imaging and laboratory detection. Surgical resection, TACE, chemotherapy and radiofrequency ablation should be performed in combination and actively for patients with PHNEC or recurrence to get the best effectiveness; they might extend the disease-free and overall survival.
Collapse
Affiliation(s)
- Li-Ming Wang
- Department of Abdominal Surgery, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China E-mail :
| | | | | |
Collapse
|
7
|
Dimitroulis D, Tsaparas P, Valsami S, Mantas D, Spartalis E, Markakis C, Kouraklis G. Indications, limitations and maneuvers to enable extended hepatectomy: Current trends. World J Gastroenterol 2014; 20:7887-7893. [PMID: 24976725 PMCID: PMC4069316 DOI: 10.3748/wjg.v20.i24.7887] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 02/11/2014] [Accepted: 03/10/2014] [Indexed: 02/06/2023] Open
Abstract
The liver is a solid organ with a wide variety of primary benign or malignant tumors as well as metastatic lesions. Surgical resection of these tumors remains the only curative modality. Several limitations, however, do not allow the performance of these operations. This review evaluates the indications and limitations regarding these extended hepatic resections, as well as describing all the manipulations that increase the candidates for such operations. A thorough review of the literature was performed in order to define indications for extended hepatectomy, as well as to present all methods that contribute to increasing the volume of the future remnant liver. The role of portal vein ligation, portal vein embolization, two-stage hepatectomy, and in situ liver transection are evaluated in the setting of indications and results. Extended hepatectomies are a necessity due to oncological reasons. All methods developed in order to increase the volume of the remnant liver are safe and efficient. in situ liver transection is a novel and revolutionary two-step procedure for extended hepatic resections. Further clinical studies are required to estimate long-term results and the oncological basis of this technique.
Collapse
|
8
|
Vemuri RC, Jarecha R, Hwi KK, Gundamaraju R, MaruthiKanth A, Kulkarni A, Reddy S. Importance of Volumetric Measurement Processes in Oncology Imaging Trials for Screening and Evaluation of Tumors as Per Response Evaluation Criteria in Solid Tumors. Asian Pac J Cancer Prev 2014; 15:2375-8. [DOI: 10.7314/apjcp.2014.15.5.2375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|