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Panettieri E, Vega EA, Salirrosas O, Ogiso S, Geller D, Conrad C. Global practice patterns of preoperative image reconstruction for liver surgery. J Gastrointest Surg 2024; 28:26-32. [PMID: 38353071 DOI: 10.1016/j.gassur.2023.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/31/2023] [Accepted: 10/28/2023] [Indexed: 02/16/2024]
Abstract
BACKGROUND Three-dimensional (3-D) liver modeling is used globally; however, its actual practice is limited to a few centers. This study aimed to assess practice patterns and barriers to the use of 3-D modeling among liver surgeons worldwide. METHODS A survey approved by the International Hepato-Pancreato-Biliary Association research council consisting of 27 questions was conducted using an online questionnaire. Incomplete responses were excluded. RESULTS Of 235 respondents from 46 countries, 81.3% reported experience with 3-D modeling; however, only 21% used it in > 75% of cases. Surgeons using 3-D reconstruction were older (P = .025), worked more frequently at academic facilities (P = .007), and had more years of experience (P = .001), especially in minimally invasive liver surgery (MILS) (P = .038). In addition, 3-D rendering was performed by surgeons in 50.8% of cases. Liver volumetry was the most frequent indication (80.1%), and decreased postoperative complications were the main perceived benefit (53.6%). CONCLUSIONS More experience in liver surgery because of seniority, case volume, and openness to novel technology (MILS) is associated with a greater appreciation for the value of 3-D modeling. Our results suggest the need for senior surgeons to help early-career surgeons consider 3-D modeling for the reported benefit of reduced intra- and postoperative complications.
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Affiliation(s)
- Elena Panettieri
- Department of Surgery, St. Elizabeth's Medical Center, Boston University School of Medicine, Boston, Massachusetts, United States; Hepatobiliary Surgery Unit, Fondazione "Policlinico Universitario A. Gemelli" Istituto di Ricovero e Cura a Carattere Scientifico, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Eduardo A Vega
- Department of Surgery, St. Elizabeth's Medical Center, Boston University School of Medicine, Boston, Massachusetts, United States
| | - Oscar Salirrosas
- Department of Surgery, St. Elizabeth's Medical Center, Boston University School of Medicine, Boston, Massachusetts, United States
| | - Satoshi Ogiso
- Division of Hepato-Biliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - David Geller
- Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States
| | - Claudius Conrad
- Department of Surgery, St. Elizabeth's Medical Center, Boston University School of Medicine, Boston, Massachusetts, United States.
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Machry M, Ferreira LF, Lucchese AM, Kalil AN, Feier FH. Liver volumetric and anatomic assessment in living donor liver transplantation: The role of modern imaging and artificial intelligence. World J Transplant 2023; 13:290-298. [PMID: 38174151 PMCID: PMC10758682 DOI: 10.5500/wjt.v13.i6.290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/17/2023] [Accepted: 10/17/2023] [Indexed: 12/15/2023] Open
Abstract
The shortage of deceased donor organs has prompted the development of alternative liver grafts for transplantation. Living-donor liver transplantation (LDLT) has emerged as a viable option, expanding the donor pool and enabling timely transplantation with favorable graft function and improved long-term outcomes. An accurate evaluation of the donor liver's volumetry (LV) and anatomical study is crucial to ensure adequate future liver remnant, graft volume and precise liver resection. Thus, ensuring donor safety and an appropriate graft-to-recipient weight ratio. Manual LV (MLV) using computed tomography has traditionally been considered the gold standard for assessing liver volume. However, the method has been limited by cost, subjectivity, and variability. Automated LV techniques employing advanced segmentation algorithms offer improved reproducibility, reduced variability, and enhanced efficiency compared to manual measurements. However, the accuracy of automated LV requires further investigation. The study provides a comprehensive review of traditional and emerging LV methods, including semi-automated image processing, automated LV techniques, and machine learning-based approaches. Additionally, the study discusses the respective strengths and weaknesses of each of the aforementioned techniques. The use of artificial intelligence (AI) technologies, including machine learning and deep learning, is expected to become a routine part of surgical planning in the near future. The implementation of AI is expected to enable faster and more accurate image study interpretations, improve workflow efficiency, and enhance the safety, speed, and cost-effectiveness of the procedures. Accurate preoperative assessment of the liver plays a crucial role in ensuring safe donor selection and improved outcomes in LDLT. MLV has inherent limitations that have led to the adoption of semi-automated and automated software solutions. Moreover, AI has tremendous potential for LV and segmentation; however, its widespread use is hindered by cost and availability. Therefore, the integration of multiple specialties is necessary to embrace technology and explore its possibilities, ranging from patient counseling to intraoperative decision-making through automation and AI.
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Affiliation(s)
- Mayara Machry
- Department of Hepato-Biliary-Pancreatic Surgery and Liver Transplantation, Irmandade Santa Casa de Misericórdia de Porto Alegre, Porto Alegre 90020-090, Brazil
| | - Luis Fernando Ferreira
- Postgraduation Program in Medicine: Hepatology, Federal University of Health Sciences of Porto Alegre, Porto Alegre 90050-170, Brazil
| | - Angelica Maria Lucchese
- Department of Hepato-Biliary-Pancreatic Surgery and Liver Transplantation, Irmandade Santa Casa de Misericórdia de Porto Alegre, Porto Alegre 90020-090, Brazil
| | - Antonio Nocchi Kalil
- Department of Hepato-Biliary-Pancreatic Surgery and Liver Transplantation, Irmandade Santa Casa de Misericórdia de Porto Alegre, Porto Alegre 90020-090, Brazil
- Postgraduation Program in Medicine: Hepatology, Federal University of Health Sciences of Porto Alegre, Porto Alegre 90050-170, Brazil
| | - Flavia Heinz Feier
- Department of Hepato-Biliary-Pancreatic Surgery and Liver Transplantation, Irmandade Santa Casa de Misericórdia de Porto Alegre, Porto Alegre 90020-090, Brazil
- Postgraduation Program in Medicine: Hepatology, Federal University of Health Sciences of Porto Alegre, Porto Alegre 90050-170, Brazil
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Giglio MC, Dolce P, Yilmaz S, Tokat Y, Acarli K, Kilic M, Zeytunlu M, Unek T, Karam V, Adam R, Polak WG, Fondevila C, Nadalin S, Troisi RI. Development of a model to predict the risk of early graft failure after adult-to-adult living donor liver transplantation: An ELTR study. Liver Transpl 2023:01445473-990000000-00296. [PMID: 38079264 DOI: 10.1097/lvt.0000000000000312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 11/18/2023] [Indexed: 01/12/2024]
Abstract
Graft survival is a critical end point in adult-to-adult living donor liver transplantation (ALDLT), where graft procurement endangers the lives of healthy individuals. Therefore, ALDLT must be responsibly performed in the perspective of a positive harm-to-benefit ratio. This study aimed to develop a risk prediction model for early (3 months) graft failure (EGF) following ALDLT. Donor and recipient factors associated with EGF in ALDLT were studied using data from the European Liver Transplant Registry. An artificial neural network classification algorithm was trained on a set of 2073 ALDLTs, validated using cross-validation, tested on an independent random-split sample (n=518), and externally validated on United Network for Organ Sharing Standard Transplant Analysis and Research data. Model performance was assessed using the AUC, calibration plots, and decision curve analysis. Graft type, graft weight, level of hospitalization, and the severity of liver disease were associated with EGF. The model ( http://ldlt.shinyapps.io/eltr_app ) presented AUC values at cross-validation, in the independent test set, and at external validation of 0.69, 0.70, and 0.68, respectively. Model calibration was fair. The decision curve analysis indicated a positive net benefit of the model, with an estimated net reduction of 5-15 EGF per 100 ALDLTs. Estimated risks>40% and<5% had a specificity of 0.96 and sensitivity of 0.99 in predicting and excluding EGF, respectively. The model also stratified long-term graft survival ( p <0.001), which ranged from 87% in the low-risk group to 60% in the high-risk group. In conclusion, based on a panel of donor and recipient variables, an artificial neural network can contribute to decision-making in ALDLT by predicting EGF risk.
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Affiliation(s)
- Mariano Cesare Giglio
- Department of Clinical Medicine and Surgery, Division of HPB and Robotic Surgery, Federico II University Hospital Naples, Italy
| | - Pasquale Dolce
- Department of Translational Medicine, Federico II University of Naples, Naples, Italy
| | - Sezai Yilmaz
- Department of Surgery and Liver Transplant Institute, Inonu University Faculty of Medicine, Malatya, Turkey
| | - Yaman Tokat
- International Liver Center & Acibadem Healthcare Hospitals, Istanbul, Turkey
| | - Koray Acarli
- Department of Organ Transplantation, Istanbul Memorial Hospital, Istanbul, Turkey
- Department of Surgery, Istanbul Memorial Hospital, Istanbul, Turkey
| | - Murat Kilic
- Department of Liver Transplantation, Izmir Kent Hospital, Izmir, Turkey
| | - Murat Zeytunlu
- Departments of General Surgery and Gastroenterology, Ege University, School of Medicine, Izmir, Turkey
| | - Tarkan Unek
- Department of General Surgery, Hepatopancreaticobiliary Surgery and Liver Transplantation Unit, Dokuz Eylul University Faculty of Medicine, Narlidere, Izmir, Turkey
| | - Vincent Karam
- Paul Brousse Hospital, Univ Paris-Sud, Inserm, Villejuif, France
| | - René Adam
- Paul Brousse Hospital, Univ Paris-Sud, Inserm, Villejuif, France
| | | | - Constantino Fondevila
- Department of General and Digestive Surgery, Hospital Clínic, University of Barcelona, Barcelona, Spain
| | - Silvio Nadalin
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Tübingen, Germany
| | - Roberto Ivan Troisi
- Department of Clinical Medicine and Surgery, Division of HPB and Robotic Surgery, Federico II University Hospital Naples, Italy
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4
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Yang X, Park S, Lee S, Han K, Lee MR, Song JS, Yu HC, Do Yang J. Estimation of right lobe graft weight for living donor liver transplantation using deep learning-based fully automatic computed tomographic volumetry. Sci Rep 2023; 13:17746. [PMID: 37853228 PMCID: PMC10584880 DOI: 10.1038/s41598-023-45140-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 10/16/2023] [Indexed: 10/20/2023] Open
Abstract
This study aimed at developing a fully automatic technique for right lobe graft weight estimation using deep learning algorithms. The proposed method consists of segmentation of the full liver region from computed tomography (CT) images, classification of the entire liver region into the right and left lobes, and estimation of the right lobe graft weight from the CT-measured right lobe graft volume using a volume-to-weight conversion formula. The first two steps were performed with a transformer-based deep learning model. To train and evaluate the model, a total of 248 CT datasets (188 for training, 40 for validation, and 20 for testing and clinical evaluation) were used. The Dice similarity coefficient (DSC), mean surface distance (MSD), and the 95th percentile Hausdorff distance (HD95) were used for evaluating the segmentation accuracy of the full liver region and the right liver lobe. The correlation coefficient (CC), percentage error (PE), and percentage absolute error (PAE) were used for the clinical evaluation of the estimated right lobe graft weight. The proposed method achieved high accuracy in segmentation for DSC, MSD, and HD95 (95.9% ± 1.0%, 1.2 ± 0.4 mm, and 5.2 ± 1.9 mm for the entire liver region; 92.4% ± 2.7%, 2.0 ± 0.7 mm, and 8.8 ± 2.9 mm for the right lobe) and in clinical evaluation for CC, PE, and PAE (0.859, - 1.8% ± 9.6%, and 8.6% ± 4.7%). For the right lobe graft weight estimation, the present study underestimated the graft weight by - 1.8% on average. A mean difference of - 21.3 g (95% confidence interval: - 55.7 to 13.1, p = 0.211) between the estimated graft weight and the actual graft weight was achieved in this study. The proposed method is effective for clinical application.
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Affiliation(s)
- Xiaopeng Yang
- School of Global Entrepreneurship and Information Communication Technology, Handong Global University, Pohang, 37554, Republic of Korea
| | - Seonyeong Park
- School of Global Entrepreneurship and Information Communication Technology, Handong Global University, Pohang, 37554, Republic of Korea
| | - Seungyoo Lee
- School of Global Entrepreneurship and Information Communication Technology, Handong Global University, Pohang, 37554, Republic of Korea
| | - Kyujin Han
- School of Global Entrepreneurship and Information Communication Technology, Handong Global University, Pohang, 37554, Republic of Korea
| | - Mi Rin Lee
- Department of Surgery, Jeonbuk National University Medical School and Hospital, Jeonju, 54907, Republic of Korea
- Research Institute of Clinical Medicine, Jeonbuk National University, Jeonju, 54907, Republic of Korea
- Biomedical Research Institute, Jeonbuk National University Hospital, Jeonju, 54907, Republic of Korea
| | - Ji Soo Song
- Department of Radiology, Jeonbuk National University Medical School and Hospital, Jeonju, 54907, Republic of Korea
| | - Hee Chul Yu
- Department of Surgery, Jeonbuk National University Medical School and Hospital, Jeonju, 54907, Republic of Korea
- Research Institute of Clinical Medicine, Jeonbuk National University, Jeonju, 54907, Republic of Korea
- Biomedical Research Institute, Jeonbuk National University Hospital, Jeonju, 54907, Republic of Korea
| | - Jae Do Yang
- Department of Surgery, Jeonbuk National University Medical School and Hospital, Jeonju, 54907, Republic of Korea.
- Research Institute of Clinical Medicine, Jeonbuk National University, Jeonju, 54907, Republic of Korea.
- Biomedical Research Institute, Jeonbuk National University Hospital, Jeonju, 54907, Republic of Korea.
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5
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Giglio MC, Zanfardino M, Franzese M, Zakaria H, Alobthani S, Zidan A, Ayoub II, Shoreem HA, Lee B, Han HS, Penna AD, Nadalin S, Troisi RI, Broering DC. Machine learning improves the accuracy of graft weight prediction in living donor liver transplantation. Liver Transpl 2023; 29:172-183. [PMID: 37160073 DOI: 10.1002/lt.26578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 07/29/2022] [Accepted: 09/06/2022] [Indexed: 01/28/2023]
Abstract
Precise graft weight (GW) estimation is essential for planning living donor liver transplantation to select grafts of adequate size for the recipient. This study aimed to investigate whether a machine-learning model can improve the accuracy of GW estimation. Data from 872 consecutive living donors of a left lateral sector, left lobe, or right lobe to adults or children for living-related liver transplantation were collected from January 2011 to December 2019. Supervised machine-learning models were trained (80% of observations) to predict GW using the following information: donor's age, sex, height, weight, and body mass index; graft type (left, right, or left lateral lobe); computed tomography estimated graft volume and total liver volume. Model performance was measured in a random independent set (20% of observations) and in an external validation cohort using the mean absolute error (MAE) and the mean absolute percentage error and compared with methods currently available for GW estimation. The best-performing machine-learning model showed an MAE value of 50 ± 62 g in predicting GW, with a mean error of 10.3%. These errors were significantly lower than those observed with alternative methods. In addition, 62% of predictions had errors <10%, whereas errors >15% were observed in only 18.4% of the cases compared with the 34.6% of the predictions obtained with the best alternative method ( p < 0.001). The machine-learning model is made available as a web application ( http://graftweight.shinyapps.io/prediction ). Machine learning can improve the precision of GW estimation compared with currently available methods by reducing the frequency of significant errors. The coupling of anthropometric variables to the preoperatively estimated graft volume seems necessary to improve the accuracy of GW estimation.
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Affiliation(s)
- Mariano Cesare Giglio
- Division of Hepato-biliary-pancreatic, Minimally Invasive and Robotic surgery, and Transplantation Service , Federico II University Hospital , Naples , Italy
| | | | | | - Hazem Zakaria
- Hepatopancreatobiliary and Liver Transplant Surgery , National Liver Institute, Menoufia University , Menoufia , Egypt.,Organ Transplant Center , King Faisal Specialist Hospital and Research Center , Riyadh , Saudi Arabia
| | - Salah Alobthani
- Organ Transplant Center , King Faisal Specialist Hospital and Research Center , Riyadh , Saudi Arabia
| | - Ahmed Zidan
- Organ Transplant Center , King Faisal Specialist Hospital and Research Center , Riyadh , Saudi Arabia.,Department of General Surgery , Assiut University , Assiut , Egypt
| | - Islam Ismail Ayoub
- Hepatopancreatobiliary and Liver Transplant Surgery , National Liver Institute, Menoufia University , Menoufia , Egypt
| | - Hany Abdelmeguid Shoreem
- Hepatopancreatobiliary and Liver Transplant Surgery , National Liver Institute, Menoufia University , Menoufia , Egypt
| | - Boram Lee
- Department of Surgery , Seoul National University Bundang Hospital , Seoul , Korea
| | - Ho-Seong Han
- Department of Surgery , Seoul National University Bundang Hospital , Seoul , Korea
| | - Andrea Della Penna
- Department of General, Visceral, and Transplant Surgery , University Hospital Tübingen , Tübingen , Germany
| | - Silvio Nadalin
- Department of General, Visceral, and Transplant Surgery , University Hospital Tübingen , Tübingen , Germany
| | - Roberto Ivan Troisi
- Division of Hepato-biliary-pancreatic, Minimally Invasive and Robotic surgery, and Transplantation Service , Federico II University Hospital , Naples , Italy
| | - Dieter Clemens Broering
- Organ Transplant Center , King Faisal Specialist Hospital and Research Center , Riyadh , Saudi Arabia
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6
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Katsanos G, Karakasi KE, Karolos IA, Kofinas A, Antoniadis N, Tsioukas V, Tsoulfas G. Volumetric assessment of hepatic grafts using a light detection and ranging system for 3D scanning: Preliminary data. World J Hepatol 2022; 14:1504-1511. [PMID: 36158905 PMCID: PMC9376777 DOI: 10.4254/wjh.v14.i7.1504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/10/2022] [Accepted: 06/27/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Liver transplantation has evolved into a safe life-saving operation and remains the golden standard in the treatment of end stage liver disease. The main limiting factor in the application of liver transplantation is graft shortage. Many strategies have been developed in order to alleviate graft shortage, such as living donor partial liver transplantation and split liver transplantation for adult and pediatric patients. In these strategies, liver volume assessment is of paramount importance, as size mismatch can have severe consequences in the success of liver transplantation.
AIM To evaluate the safety, feasibility, and accuracy of light detection and ranging (LIDAR) 3D photography in the prediction of whole liver graft volume and mass.
METHODS Seven liver grafts procured for orthotopic liver transplantation from brain deceased donors were prospectively measured with an LIDAR handheld camera and their mass was calculated and compared to their actual weight.
RESULTS The mean error of all measurements was 17.03 g (range 3.56-59.33 g). Statistical analysis of the data yielded a Pearson correlation coefficient index of 0.9968, indicating a strong correlation between the values and a Student’s t-test P value of 0.26. Mean accuracy of the measurements was calculated at 97.88%.
CONCLUSION Our preliminary data indicate that LIDAR scanning of liver grafts is a safe, cost-effective, and feasible method of ex vivo determination of whole liver volume and mass. More data are needed to determine the precision and accuracy of this method.
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Affiliation(s)
- Georgios Katsanos
- Department of Transplantation, Medical School, Aristotle University of Thessaloniki, Hippokration General Hospital, Thessaloniki 54642, Greece
| | - Konstantina-Eleni Karakasi
- Department of Transplantation, Medical School, Aristotle University of Thessaloniki, Hippokration General Hospital, Thessaloniki 54642, Greece
| | - Ion-Anastasios Karolos
- Department of Rural and Surveying Engineering, Aristotle University of Thessaloniki, Thessaloniki 54642, Greece
| | - Athanasios Kofinas
- Department of Transplantation, Medical School, Aristotle University of Thessaloniki, Hippokration General Hospital, Thessaloniki 54642, Greece
| | - Nikolaos Antoniadis
- Department of Transplantation, Medical School, Aristotle University of Thessaloniki, Hippokration General Hospital, Thessaloniki 54642, Greece
| | - Vassilios Tsioukas
- Department of Rural and Surveying Engineering, Aristotle University of Thessaloniki, Thessaloniki 54642, Greece
| | - Georgios Tsoulfas
- Department of Transplantation, Medical School, Aristotle University of Thessaloniki, Hippokration General Hospital, Thessaloniki 54642, Greece
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Accuracy and Efficiency of Right-Lobe Graft Weight Estimation Using Deep-Learning-Assisted CT Volumetry for Living-Donor Liver Transplantation. Diagnostics (Basel) 2022; 12:diagnostics12030590. [PMID: 35328143 PMCID: PMC8946991 DOI: 10.3390/diagnostics12030590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 12/19/2022] Open
Abstract
CT volumetry (CTV) has been widely used for pre-operative graft weight (GW) estimation in living-donor liver transplantation (LDLT), and the use of a deep-learning algorithm (DLA) may further improve its efficiency. However, its accuracy has not been well determined. To evaluate the efficiency and accuracy of DLA-assisted CTV in GW estimation, we performed a retrospective study including 581 consecutive LDLT donors who donated a right-lobe graft. Right-lobe graft volume (GV) was measured on CT using the software implemented with the DLA for automated liver segmentation. In the development group (n = 207), a volume-to-weight conversion formula was constructed by linear regression analysis between the CTV-measured GV and the intraoperative GW. In the validation group (n = 374), the agreement between the estimated and measured GWs was assessed using the Bland–Altman 95% limit-of-agreement (LOA). The mean process time for GV measurement was 1.8 ± 0.6 min (range, 1.3–8.0 min). In the validation group, the GW was estimated using the volume-to-weight conversion formula (estimated GW [g] = 206.3 + 0.653 × CTV-measured GV [mL]), and the Bland–Altman 95% LOA between the estimated and measured GWs was −1.7% ± 17.1%. The DLA-assisted CT volumetry allows for time-efficient and accurate estimation of GW in LDLT.
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Comment on "The Risk of Going Small: Lowering GRWR and Overcoming Small-for-Size Syndrome in Adult Living Donor Liver Transplantation". Ann Surg 2021; 274:e817-e818. [PMID: 33201099 DOI: 10.1097/sla.0000000000004442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Masperi A, Cubadda V, Bombelli L, Labruna R, Bagnardi V, Fodor CI, Pagan E, Bonomo G, Orsi F. Intra- inter-observer repeatability in liver computed tomography volumetry in patients undergoing radioembolization simulation. Abdom Radiol (NY) 2021; 46:3448-3455. [PMID: 33630128 DOI: 10.1007/s00261-021-02980-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/23/2021] [Accepted: 02/09/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE The careful evaluation of MDCT is an essential step for the treatment planning in pre-treatment imaging work-up for Trans-Arterial Radio Embolization (TARE). It may provide unique volumetric data (CTVs), which are information useful for an effective and safe TARE. The purpose of this study is to demonstrate that the radiographer is able to calculate CTVs of TARE simulation with the same precision as the interventional radiologist. METHODS This study retrospectively considers 17 consecutive patients (8 males, 9 females; mean age 66.3 ± 13.2 years) who underwent pre-treatment work-up for TARE, between May 2019 and February 2020 (trial ID:2234 - protocol). For each patient, four specific parameters are evaluated from MDCT achieved during treatment simulation: healthy liver volume (HLV), the whole hepatic parenchyma (THV = healthy liver and TTV = tumour) involved by TARE, and whole liver volume (WLV). Four independent observers-R1 (expert interventional radiologist), T1, T2, and T3 (radiographers, with different experiences in the field of interventional radiology)-are involved in the imaging analysed. RESULTS All the 4 observers detected the same number of hepatic lesion(s) per patient. Regarding the three radiographers, the intra-observer reliability for CTVs is very high 0.997 to 1.000 (95%CI). Also inter-observer reproducibility between radiographers is excellent regarding CTVs, 0.965 to 0.999 (95%CI). The accuracy of radiographer evaluation is very high 0.964 to 0.999 (95%CI). CONCLUSIONS AND IMPLICATIONS FOR PRACTICE The high intra- and inter-observer reproducibility shows that a properly trained radiographers might have the same accuracy as interventional radiologists, in assessing liver CTV data for planning TARE.
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Affiliation(s)
- Andrea Masperi
- Division of Radiology, IEO European Institute of Oncology IRCCS, Via Giuseppe Ripamonti 435, Milan, 20141, Italy.
| | - Valerio Cubadda
- Division of Radiology, IEO European Institute of Oncology IRCCS, Via Giuseppe Ripamonti 435, Milan, 20141, Italy
| | - Luca Bombelli
- Division of Radiology, IEO European Institute of Oncology IRCCS, Via Giuseppe Ripamonti 435, Milan, 20141, Italy
| | - Roberto Labruna
- Division of Radiology, IEO European Institute of Oncology IRCCS, Via Giuseppe Ripamonti 435, Milan, 20141, Italy
| | - Vincenzo Bagnardi
- Department of Statistics and Quantitative Methods, University of Milan-Bicocca, Milan, Italy
| | - Cristiana Iuliana Fodor
- Division of Radiology, IEO European Institute of Oncology IRCCS, Via Giuseppe Ripamonti 435, Milan, 20141, Italy
| | - Eleonora Pagan
- Department of Statistics and Quantitative Methods, University of Milan-Bicocca, Milan, Italy
| | - Guido Bonomo
- Division of Interventional Radiology, IEO European Institute of Oncology IRCCS, Via Giuseppe Ripamonti 435, Milan, 20141, Italy
| | - Franco Orsi
- Division of Interventional Radiology, IEO European Institute of Oncology IRCCS, Via Giuseppe Ripamonti 435, Milan, 20141, Italy
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10
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Ikegami T, Furukawa K, Haruki K, Onda S, Gocho T. Predicted Volume or Actual Weight for Graft Selection Policy in Living-donor Liver Transplantation. Transplantation 2021; 105:e43. [PMID: 33760793 DOI: 10.1097/tp.0000000000003583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Toru Ikegami
- Division of Hepatobiliary and Pancreas Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
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11
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Kim JM, Chung YJ, Kim S, Rhu J, Choi GS, Joh JW. Impact of Graft Weight Change During Perfusion on Hepatocellular Carcinoma Recurrence After Living Donor Liver Transplantation. Front Oncol 2021; 10:609844. [PMID: 33718110 PMCID: PMC7945034 DOI: 10.3389/fonc.2020.609844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 12/04/2020] [Indexed: 11/28/2022] Open
Abstract
BACKGROUNDS Inadequate liver volume and weight is a major source of morbidity and mortality after adult living donor liver transplantation (LDLT). The purpose of our study was to investigate HCC recurrence, graft failure, and patient survival according to change in right liver graft weight after histidine-tryptophan-ketoglutarate (HTK) solution perfusion in LDLT. METHODS Two hundred twenty-eight patients underwent LDLT between 2013 and 2017. We calculated the change in graft weight by subtracting pre-perfusion graft weight from post-perfusion graft weight. Patients with increased graft weight were defined as the positive group, and patients with decreased graft weight were defined as the negative group. RESULTS After excluding patients who did not meet study criteria, 148 patients underwent right or extended right hepatectomy. The negative group included 89 patients (60.1%), and the positive group included 59 patients (39.9%). Median graft weight change was -28 g (range; -132-0 g) in the negative group and 21 g (range; 1-63 g) in the positive group (P<0.001). Median hospitalization time was longer for the positive group than the negative group (27 days vs. 23 days; P=0.048). There were no statistical differences in tumor characteristics, postoperative complications, early allograft dysfunction, or acute rejection between the two groups. Disease-free survival, death-censored graft survival, and patient survival were lower in the positive group than the negative group. Additionally, the positive group showed strong association with HCC recurrence, death-censored graft survival, and patient survival in multivariate analysis. CONCLUSION This study suggests that positive graft weight change during HTK solution perfusion indicates poor prognosis in LDLT.
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Effects of laparoscopy, laparotomy, and respiratory phase on liver volume in a live porcine model for liver resection. Surg Endosc 2021; 35:7049-7057. [PMID: 33398570 PMCID: PMC8599330 DOI: 10.1007/s00464-020-08220-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 12/03/2020] [Indexed: 12/16/2022]
Abstract
Background Hepatectomy, living donor liver transplantations and other major hepatic interventions rely on precise calculation of the total, remnant and graft liver volume. However, liver volume might differ between the pre- and intraoperative situation. To model liver volume changes and develop and validate such pre- and intraoperative assistance systems, exact information about the influence of lung ventilation and intraoperative surgical state on liver volume is essential. Methods This study assessed the effects of respiratory phase, pneumoperitoneum for laparoscopy, and laparotomy on liver volume in a live porcine model. Nine CT scans were conducted per pig (N = 10), each for all possible combinations of the three operative (native, pneumoperitoneum and laparotomy) and respiratory states (expiration, middle inspiration and deep inspiration). Manual segmentations of the liver were generated and converted to a mesh model, and the corresponding liver volumes were calculated. Results With pneumoperitoneum the liver volume decreased on average by 13.2% (112.7 ml ± 63.8 ml, p < 0.0001) and after laparotomy by 7.3% (62.0 ml ± 65.7 ml, p = 0.0001) compared to native state. From expiration to middle inspiration the liver volume increased on average by 4.1% (31.1 ml ± 55.8 ml, p = 0.166) and from expiration to deep inspiration by 7.2% (54.7 ml ± 51.8 ml, p = 0.007). Conclusions Considerable changes in liver volume change were caused by pneumoperitoneum, laparotomy and respiration. These findings provide knowledge for the refinement of available preoperative simulation and operation planning and help to adjust preoperative imaging parameters to best suit the intraoperative situation.
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Yamamoto Y. Evaluation of Liver Function and the Role of Biliary Drainage before Major Hepatic Resections. Visc Med 2020; 37:10-17. [PMID: 33718480 DOI: 10.1159/000512439] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 10/20/2020] [Indexed: 12/17/2022] Open
Abstract
Background Prevention of posthepatectomy liver failure is a prerequisite for improving the postoperative outcome of perihilar cholangiocarcinoma. From this perspective, appropriate assessment of future liver remnant (FLR) function and the optimized preparation are mandatory. Summary FLR volume ratio using CT volumetry based on 3-dimensional vascular imaging is the current assessment yardstick and is sufficient for assessing a normal liver. However, in a liver with underling parenchymal disease such as fibrosis or prolonged jaundice, weighing up the degree of liver damage against the FLR volume ratio is necessary to know the real FLR function. For this purpose, the indocyanine green (ICG) clearance test, monoethylglycinexylidide (MEGX) test, liver maximum capacity (LiMAX) test, 99mTc-labeled galactosyl human serum albumin (99mTc-GSA) scintigraphy, albumin-bilirubin (ALBI) grade, and ALPlat (albumin × platelets) criterion are used. After the optimization of FLR function by means of portal vein embolization or associating liver partition and PVL (portal vein ligation) for staged hepatectomy (ALPPS), SPECT scintigraphy with either 99mTc-GSA or 99mTc-mebrofenin compensates for misestimation due to the regional heterogeneity of liver function. The role of preoperative biliary drainage has long been debated, with the associated complications having led to a lack of approval. However, the recent establishment of safety and an improvement in success rates of endoscopic biliary drainage seem to be changing the awareness of the importance of biliary drainage. Key Messages Appropriate selection of an assessment method is of prime importance to predict the FLR function according to the preoperative condition of the liver. Preoperative biliary drainage in patients with perihilar cholangiocarcinoma is gaining support due to the increasing safety and success rate, especially in patients who need optimization of their liver function before hepatectomy.
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Affiliation(s)
- Yuzo Yamamoto
- Department of Gastroenterological Surgery, Akita University Graduate School of Medicine, Akita, Japan
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Ikegami T, Onda S, Furukawa K, Haruki K, Shirai Y, Gocho T. Small-for-size graft, small-for-size syndrome and inflow modulation in living donor liver transplantation. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2020; 27:799-809. [PMID: 32897590 DOI: 10.1002/jhbp.822] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 01/10/2023]
Abstract
The extended application of living donor liver transplantation (LDLT) has revealed the problem of graft size mismatching called "small-for-size syndrome (SFSS)." The initial trials to resolve this problem involved increasing the procured graft size, from left to right, and even extending to include a right lobe graft. Clinical cases of living right lobe donations have been reported since then, drawing attention to the risks of increasing the liver volume procured from a living donor. However, not only other modes of increasing graft volume (GV) such as auxiliary or dual liver transplantation, but also control of the increased portal pressure caused by a small-for-size graft (SFSG), such as a porto-systemic shunt or splenectomy and optimal outflow reconstruction, have been trialed with some positive results. To establish an effective strategy for transplanting SFSG and preventing SFSS, it is essential to have precise knowledge and tactics to evaluate graft quality and GV, when performing these LDLTs with portal pressure control and good venous outflow. Thus, we reviewed the updated literature on the pathogenesis of and strategies for using SFSG.
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Affiliation(s)
- Toru Ikegami
- Division of Hepatobiliary and Pancreas Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Shinji Onda
- Division of Hepatobiliary and Pancreas Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Kenei Furukawa
- Division of Hepatobiliary and Pancreas Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Koichiro Haruki
- Division of Hepatobiliary and Pancreas Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Yoshihiro Shirai
- Division of Hepatobiliary and Pancreas Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Takeshi Gocho
- Division of Hepatobiliary and Pancreas Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
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Kwon HJ, Kim KW, Jang JK, Lee J, Song GW, Lee SG. Reproducibility and reliability of computed tomography volumetry in estimation of the right-lobe graft weight in adult-to-adult living donor liver transplantation: Cantlie's line vs portal vein territorialization. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2020; 27:541-547. [PMID: 32353894 DOI: 10.1002/jhbp.749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/25/2020] [Accepted: 04/01/2020] [Indexed: 11/12/2022]
Abstract
BACKGROUND/PURPOSE In living-donor liver transplantation (LDLT), liver volume assessment is a mandatory step in determining donor appropriateness. This study aimed to compare reliability and reproducibility between two major methods to define virtual hepatectomy plane, based on Cantlie's line (CTV-Cantlie) and portal vein territorialization (CTV-PVT) for right-lobe graft weight estimation in LDLT. METHODS A total of 188 donors who underwent preoperative CT scans were included. The liver was divided into right and left lobes using CTV-Cantlie and CTV-PTV measurements by two readers. Intraclass correlation coefficient (ICC) was used to determine interreader variability of hepatic weight measured using each CTV method. Intraoperative graft weight (IOW) was used as reference standard of right-lobe graft weight. Pearson correlation test was performed to determine correlation coefficients between presumed graft weight by each CTV method and IOW. RESULTS Intraclass correlation coefficients for total liver weight were roughly equivalent between the two CTV methods (CTV-Cantlie: 0.965 [95% CI, 0.954-0.974], CTV-PVT: 0.977 [0.970-0.983]). However, ICCs of right-and left-lobe weights between two readers were higher with CTV-PVT (0.997 and 0.850) than with CTV-Cantlie (0.829 and 0.668). The IOW was 716.0 ± 162.0 g. Correlation coefficients between presumed graft weight by CTV-Cantlie or CTV-PVT and IOW were 0.722 and 0.807, respectively (both P < .001). CONCLUSIONS For estimation of the right-lobe graft weight in LDLT, CTV-PVT may provide higher reliability and reproducibility than CTV-Cantlie.
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Affiliation(s)
- Heon-Ju Kwon
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyoung Won Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jin Kyoo Jang
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jeongjin Lee
- School of Computer Science and Engineering, Soongsil University, Seoul, Korea
| | - Gi-Won Song
- Division of Liver Transplantation and Hepatobiliary Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung-Gyu Lee
- Division of Liver Transplantation and Hepatobiliary Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Jeong SY, Lee J, Kim KW, Jang JK, Kwon HJ, Song GW, Lee SG. Estimation of the Right Posterior Section Volume in Live Liver Donors: Semiautomated CT Volumetry Using Portal Vein Segmentation. Acad Radiol 2020; 27:210-218. [PMID: 31060982 DOI: 10.1016/j.acra.2019.03.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/24/2019] [Accepted: 03/25/2019] [Indexed: 12/16/2022]
Abstract
RATIONALE AND OBJECTIVES To determine the accuracy of semiautomated CT volumetry using portal vein (PV) segmentation to estimate volume of the right posterior section (RPS) graft compared to intraoperative measured weight (W) in live liver donors. MATERIALS AND METHODS Among 23 donors who donated RPS grafts for liver transplantation in our institution from April 2003 to August 2016, 17 donors with CT scans within 3 months of liver procurement and PV anatomy of type I-III were included. RPS volumes were retrospectively evaluated by semiautomated CT volumetry (RPSVCTV) and by measurement of standard liver volume (SLV) and PV area ratio (RPSVSLV). RPS volumes were compared to W for correlation coefficients, (absolute) difference, and (absolute) percentage deviation. Linear fitting was performed to identify the method that yielded the greatest correlation with W. RESULTS Mean values of RPSVCTV, RPSVSLV, and W were 503.4 ± 97.8 mL (346.6-686.0), 516.54 ± 146.20 (274.06-776.32), and 518.8 ± 122.4 (370.0-789.0), respectively. RPSVCTV was strongly correlated with W (r = 0.9414; p < 0.0001), whereas RPSVSLV was only moderately did (r = 0.5899; p = 0.0127). RPSVCTV showed a significantly smaller absolute difference (35.20 ± 30.82 vs. 104.79 ± 60.27, p = 0.004) and absolute percentage deviation (6.61 ± 4.90 vs. 19.92 ± 10.37, p < 0.0001) from W. Equation correlating RPSVCTV and W was W = -74.7191 + 1.1791 RPSVCTV (R2 = 0.8862; p < 0.001). CONCLUSION RPSVCTV yields smaller absolute difference than RPSVSLV for estimating intraoperative measured weight of RPS in live liver donors. Semiautomated CT volumetry using PV segmentation is feasible for the estimation of the volume of the RPS of the liver, and RPSVCTV was strongly correlated with W (r = 0.9414; p < 0.0001).
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Ikegami T, Kim JM, Jung DH, Soejima Y, Kim DS, Joh JW, Lee SG, Yoshizumi T, Mori M. Conceptual changes in small-for-size graft and small-for-size syndrome in living donor liver transplantation. KOREAN JOURNAL OF TRANSPLANTATION 2019; 33:65-73. [PMID: 35769983 PMCID: PMC9188939 DOI: 10.4285/jkstn.2019.33.4.65] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 12/29/2019] [Indexed: 01/10/2023] Open
Abstract
Early series in living donor liver transplantation (LDLT) in adults demonstrated a lower safe limit of graft volume standard liver volume ratio 25%–45%. A subsequent worldwide large LDLT series proposed a 0.8 graft recipient weight ratio (GRWR) to define small-for-size graft (SFSG) in adult LDLT. Thereafter, researchers identified innate and inevitable factors including changes in liver volume during imaging studies and graft shrinkage due to perfusion solution. Although the definition of small-for-size syndrome (SFSS) advocated in the 2000s was mainly based on prolonged cholestasis and ascites output, the term SFSS was inadequate to describe clinical manifestations possibly caused by multiple factors. Thus, the term “early allograft dysfunction (EAD),” characterized by total bilirubin >10 mg/dL or coagulopathy with international normalized ratio >1.6 on day 7, has become prevalent to describe graft dysfunction including SFSS after LDLT. Although various efforts have been made to overcome EAD in LDLT, graft selection to maintain an expected GRWR >0.8 and full venous drainage, as well as inflow modulation using splenic artery ligation, have become standard in recent LDLT.
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Affiliation(s)
- Toru Ikegami
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - Jong Man Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Dong-Hwan Jung
- Department of Liver Transplantation and Hepatobiliary and Pancreatic Surgery, Asan Medical Center, Ulsan University School of Medicine, Seoul, Korea
| | - Yuji Soejima
- Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Dong-Sik Kim
- Division of Hepatobiliary and Pancreatic Surgery and Liver Transplantation, Department of Surgery, Korea University College of Medicine, Seoul, Korea
| | - Jae-Won Joh
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung-Gyu Lee
- Department of Liver Transplantation and Hepatobiliary and Pancreatic Surgery, Asan Medical Center, Ulsan University School of Medicine, Seoul, Korea
| | | | - Masaki Mori
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
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Remnant Liver-to-Standard Liver Volume Ratio Below 40% is Safe in Ex Vivo Liver Resection and Autotransplantation. J Gastrointest Surg 2019; 23:1964-1972. [PMID: 30374819 DOI: 10.1007/s11605-018-4022-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 10/18/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND The successful application of ex vivo liver resection and autotransplantation (ERAT) has gained widespread attention for the treatment of end-stage hepatic alveolar echinococcosis, which is considered to be unresectable by conventional methods due to extensive invasion of the extra- and intrahepatic vasculature. However, data on remnant liver volume (RLV) are limited, and the safe volume limit of remnant liver is still unclear. METHODS To determine the effect of liver volume in the technically developed era, we investigated the impact of the remnant liver-to-standard liver volume ratio (RLV/SLV) on the outcomes of ERAT. RESULTS From February 2014 to May 2018, 56 ERAT procedures were performed. Eleven patients with an RLV/SLV < 40% (group S) were compared with 45 patients with an RLV/SLV ≥ 40% (group L). Serial changes in postoperative serum total bilirubin, alanine aminotransferase, aspartate aminotransferase, and international normalized ratio were comparable in both groups. The incidences of postoperative complications did not significantly differ between the two groups. Three patients died of intra-abdominal bleeding, acute cerebral hemorrhage, and severe liver dysfunction. In RLV estimation analysis, the actual RLV and RLV/SLV were significantly smaller than the expected RLV and RLV/SLV as determined by preoperative three-dimensional reconstruction software in patients with hepatic venous outflow obstruction. CONCLUSION Patients with a smaller RLV/SLV did not have outcomes inferior to those with a larger RLV/SLV. Further studies are warranted to clarify the factors that contribute to preoperative volumetric estimation and the safe lower limits for ERAT.
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[Role of the radiologist in surgery of colorectal liver metastases : What should be removed and what must remain]. Radiologe 2019; 59:791-798. [PMID: 31410495 DOI: 10.1007/s00117-019-0577-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND The radical resection of colorectal liver metastases is the only curative option for affected patients. If properly performed, surgery provides the chance of long-term tumor-free survival. OBJECTIVE Summary of the critical interaction points between radiology and surgery in the planning and performance of (complex) liver resections. RESULTS There are many interaction points between radiology and surgery in the treatment of patients with colorectal liver metastases. Radiology supports surgery by providing detailed information of the localization of metastases, information on liver inflow and outflow as well as basic information on liver quality and function. Perioperatively, it provides interventional treatment options for postoperative complications as well as ablation of non-resectable metastases. CONCLUSION Complex liver resections can only be performed properly and successfully after thorough planning by an interdisciplinary board of surgeons, radiologists and associated disciplines.
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Mayer P, Grözinger M, Mokry T, Schemmer P, Waldburger N, Kauczor HU, Klauss M, Sommer CM. Semi-automated computed tomography Volumetry can predict hemihepatectomy specimens' volumes in patients with hepatic malignancy. BMC Med Imaging 2019; 19:20. [PMID: 30808320 PMCID: PMC6390596 DOI: 10.1186/s12880-019-0309-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 01/10/2019] [Indexed: 12/14/2022] Open
Abstract
Background One of the major causes of perioperative mortality of patients undergoing major hepatic resections is post-hepatectomy liver failure (PHLF). For preoperative appraisal of the risk of PHLF it is important to accurately predict resectate volume and future liver remnant volume (FLRV). The objective of our study is to prospectively evaluate the accuracy of hemihepatectomy resectate volumes that are determined by computed tomography volumetry (CTV) when compared with intraoperatively measured volumes and weights as gold standard in patients undergoing hemihepatectomy. Methods Twenty four patients (13 women, 11 men) scheduled for hemihepatectomy due to histologically proven primary or secondary hepatic malignancies were included in our study. CTV was performed using a semi-automated module (S, hereinafter) (syngo.CT Liver Analysis VA30, Siemens Healthcare, Germany). Conversion factors between CT volumes on the one side and intraoperative volumes and weights on the other side were calculated using the method of least squares. Absolute and relative disagreements between CT volumes and intraoperative volumes were determined. Results A conversion factor of c = 0.906 most precisely predicted intraoperative volumes of exsanguinated hemihepatectomy specimens from CT volumes in all patients with mean absolute and relative disagreements between CT volumes and intraoperative volumes of 57 ml and 6.3%. The use of operation-specific conversion factors yielded even better results. Conclusions CTV performed with S accurately predicts intraoperative volumes of hemihepatectomy specimens when applying conversion factors which compensate for exsanguination. This allows to precisely estimate the FLRV and thus minimize the risk of PHLF in patients undergoing major hepatic resections.
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Affiliation(s)
- Philipp Mayer
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany.
| | - Martin Grözinger
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Theresa Mokry
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Peter Schemmer
- Department of General and Transplant Surgery, University Hospital Heidelberg, Heidelberg, Germany.,Division of Transplant Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Nina Waldburger
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Hans-Ulrich Kauczor
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Miriam Klauss
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Christof-Matthias Sommer
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
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Haberal KM, Kural Rahatlı F, Turnaoğlu H, Özgün G, Coşkun M. Use of Computed Tomography Volumetry to Assess Liver Weight in Patients With Cirrhosis During Evaluation Before Living-Donor Liver Transplant. EXP CLIN TRANSPLANT 2018; 19:149-153. [PMID: 30398100 DOI: 10.6002/ect.2018.0008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES Computed tomography liver volumetry has been widely used to detect total and segmental liver volume in living-donor liver transplantation. However, use of this technique to evaluate the cirrhotic liver remains unclear. In this study, we evaluated the accuracy of freehand computed tomography volumetry to assess total liver volume by comparing weights of total hepatectomy specimens in patients with cirrhosis. For our analyses, we considered the density of a cirrhotic liver to be 1.1 kg/L. MATERIALS AND METHODS Liver volume was measured using a freehand computed tomography technique in 52 patients with cirrhosis from different causes and who had no solid lesions before transplant. Measurements were made with a 16-slice multidetector computed tomography scanner (Siemens Somatom Sensation 16, Erlangen, Germany). For volumetric measurements, 10-mm-thick slices with 10-mm reconstruction intervals were preferred. Total hepatectomy weights of explant livers and computed tomography volumetry data were compared. RESULTS We excluded 3 cirrhotic patients with Budd-Chiari syndrome due to wide variations in scatterplot results. In the 49 patients included in the final analyses, average estimated liver volume by computed tomography was 721 ± 398 mL and actual cirrhotic liver weight was 727.8 ± 415 g. No significant differences were shown between these measurements. A simple regression analysis used to analyze correlations between estimated liver volume by computed tomography and real cirrhotic liver weight showed correlation of 0.957 (P < .001). When computed tomography liver volumetry as the independent variable and cirrhotic liver weight as dependent variable were considered, regression analyses showed R2 = 0.915. CONCLUSIONS Freehand computed tomography liver volumetry can be confidently used to evaluate liver volume in cirrhotic liver patients similar to use of this technique to estimate actual weights in normal livers. This technique can also be valuable during pretransplant and liver resection evaluations to ensure a more successful outcome.
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Affiliation(s)
- Kemal Murat Haberal
- From the Department of Radiology, Baskent University Faculty of Medicine, Ankara, Turkey
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Schukfeh N, Schulze M, Holland AC, Dingemann J, Hoyer DP, Paul A, Theysohn JM. Computed tomography donor liver volumetry before liver transplantation in infants ≤10 kg: does the estimated graft diameter affect the outcome? Innov Surg Sci 2018; 3:253-259. [PMID: 31579789 PMCID: PMC6604587 DOI: 10.1515/iss-2017-0047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Accepted: 06/18/2018] [Indexed: 11/17/2022] Open
Abstract
Aim of the study Living donor liver transplantation (LDLT) is regularly performed in small-sized infants. Computed tomography (CT)-based donor liver volumetry is used to estimate the graft size. The aim of our study was to assess the results of CT liver volumetry and their impact on the clinical outcome after LDLT in extremely small-sized infants. Patients and methods In this study, we included all patients with a body weight of ≤10 kg who underwent living related liver transplantation at our centre between January 2004 and December 2014. In all cases of LDLT, a preoperative CT scan of the donor liver was performed, and the total liver and graft volumes were calculated. The graft shape was estimated by measuring the ventro-dorsal (thickness), cranio-caudal, and transversal (width) diameter of segment II/III. We assessed the impact of CT donor liver volumetry and other risk factors on the outcome, defined as patient and graft survival. Results In the study period, a total of 48 living related liver transplantations were performed at our centre in infants ≤10 kg [20 male (42%), 28 female (58%)]. The mean weight was 7.3 kg (range 4.4–10 kg). Among the recipients, 33 (69%) received primary abdominal closure and 15 (31%) had temporary abdominal closure. The patient and graft survival rates were 85% and 81%, respectively. In CT volumetry, the mean estimated graft volume was 255 mL (range 140–485 mL) and the actual measured mean graft weight was 307 g (range 127–463 g). The mean ventro-dorsal diameter of segment II/III was 6.9 cm (range 4.3–11.2 cm), the mean cranio-caudal diameter was 9 cm (range 5–14 cm), and the mean width was 10.5 cm (range 6–14.7 cm). The mean graft-body weight ratio (GBWR) was 4.38% (range 1.41–8.04%). A high graft weight, a GBWR >4%, and a large ventro-dorsal diameter of segment II/III were risk factors for poorer patient survival. Conclusion Preoperative assessment of the graft size is a crucial investigation before LDLT. For extremely small-sized recipients, not only the graft weight but also the graft shape seems to affect the outcome.
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Affiliation(s)
- Nagoud Schukfeh
- Department of Pediatric Surgery, Medical School Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.,Department of General, Visceral and Transplant Surgery, University Hospital, University Duisburg, Essen, Germany
| | - Maren Schulze
- Department of General, Visceral and Transplant Surgery, University Hospital, University Duisburg, Essen, Germany
| | - Anna Charlotte Holland
- Department of General, Visceral and Transplant Surgery, University Hospital, University Duisburg, Essen, Germany
| | - Jens Dingemann
- Department of Pediatric Surgery, Medical School Hannover, Hannover, Germany
| | - Dieter P Hoyer
- Department of General, Visceral and Transplant Surgery, University Hospital, University Duisburg, Essen, Germany
| | - Andreas Paul
- Department of General, Visceral and Transplant Surgery, University Hospital, University Duisburg, Essen, Germany
| | - Jens M Theysohn
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital, University Duisburg-Essen, Duisburg, Germany
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Goja S, Yadav SK, Yadav A, Piplani T, Rastogi A, Bhangui P, Saigal S, Soin AS. Accuracy of preoperative CT liver volumetry in living donor hepatectomy and its clinical implications. Hepatobiliary Surg Nutr 2018; 7:167-174. [PMID: 30046567 DOI: 10.21037/hbsn.2017.08.02] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Background An accurate preoperative volumetric assessment of donor liver is essential for successful living donor liver transplant by ensuring adequate remnant and graft recipient weight ratio (GRWR). Methods The study cohort consisted of 744 right lobe (RL), 65 left lobe (LL) and 33 left lateral sector (LLS) grafts from July 2010 to January 2014. A semi-automated interactive commercial software called AW Volume share 6 was used for volumetry. Bland Altman plot was used for assessing the agreement between estimated graft weight (EGW) and actual graft weight (AGW). Results There was no statistically significant difference between EGW and AGW for RL graft weight (722±134 vs. 717±126 gm; P=0.06). Although Bland Altman graph showed that 95% limits of agreement was more in LL (-164 to +110) than RL (-156 to +147) and LLS grafts (-137 to +239), CT scan significantly overestimated LL graft weight (EGW =460±118 gm vs. AGW =433±102 gm; P=0.003) and underestimated LLS graft weight (EGW =203±48 gm vs. AGW =254±49 gm; P<0.001). Conclusions CT volumetry overestimate LL graft and underestimate LLS graft weight. This should be factored in when selecting LL graft by taking higher GRWR.
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Affiliation(s)
- Sanjay Goja
- Institute of Liver Transplant and Regenerative Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
| | - Sanjay Kumar Yadav
- Institute of Liver Transplant and Regenerative Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
| | - Amardeep Yadav
- Institute of Liver Transplant and Regenerative Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
| | - Tarun Piplani
- Department of Radiology and Nuclear Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
| | - Amit Rastogi
- Institute of Liver Transplant and Regenerative Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
| | - Prashant Bhangui
- Institute of Liver Transplant and Regenerative Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
| | - Sanjiv Saigal
- Institute of Liver Transplant and Regenerative Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
| | - Arvinder Singh Soin
- Institute of Liver Transplant and Regenerative Medicine, Medanta, The Medicity, Gurgaon, Delhi (NCR), India
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24
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Bell R, Pandanaboyana S, Upasani V, Prasad R. Impact of graft-to-recipient weight ratio on small-for-size syndrome following living donor liver transplantation. ANZ J Surg 2018; 88:415-420. [DOI: 10.1111/ans.14245] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 07/23/2017] [Accepted: 08/18/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Richard Bell
- Department of Hepatobiliary and Transplant Surgery; St James University Hospital; Leeds UK
| | - Sanjay Pandanaboyana
- Department of Hepatobiliary and Transplant Surgery; St James University Hospital; Leeds UK
- Department of Hepatobiliary and Pancreatic Surgery; Auckland City Hospital; Auckland New Zealand
- Department of Surgery; Faculty of Medical and Health Sciences, The University of Auckland; Auckland New Zealand
| | - Vivek Upasani
- Department of Hepatobiliary and Transplant Surgery; St James University Hospital; Leeds UK
| | - Raj Prasad
- Department of Hepatobiliary and Transplant Surgery; St James University Hospital; Leeds UK
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25
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Kwon HJ, Kim KW, Kim B, Kim SY, Lee CS, Lee J, Song GW, Lee SG. Resection plane-dependent error in computed tomography volumetry of the right hepatic lobe in living liver donors. Clin Mol Hepatol 2017; 24:54-60. [PMID: 28759989 PMCID: PMC5875195 DOI: 10.3350/cmh.2017.0023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 06/24/2017] [Accepted: 06/27/2017] [Indexed: 12/11/2022] Open
Abstract
Background/Aims Computed tomography (CT) hepatic volumetry is currently accepted as the most reliable method for preoperative estimation of graft weight in living donor liver transplantation (LDLT). However, several factors can cause inaccuracies in CT volumetry compared to real graft weight. The purpose of this study was to determine the frequency and degree of resection plane-dependent error in CT volumetry of the right hepatic lobe in LDLT. Methods Forty-six living liver donors underwent CT before donor surgery and on postoperative day 7. Prospective CT volumetry (VP) was measured via the assumptive hepatectomy plane. Retrospective liver volume (VR) was measured using the actual plane by comparing preoperative and postoperative CT. Compared with intraoperatively measured weight (W), errors in percentage (%) VP and VR were evaluated. Plane-dependent error in VP was defined as the absolute difference between VP and VR. % plane-dependent error was defined as follows: |VP–VR|/W∙100. Results Mean VP, VR, and W were 761.9 mL, 755.0 mL, and 696.9 g. Mean and % errors in VP were 73.3 mL and 10.7%. Mean error and % error in VR were 64.4 mL and 9.3%. Mean plane-dependent error in VP was 32.4 mL. Mean % plane-dependent error was 4.7%. Plane-dependent error in VP exceeded 10% of W in approximately 10% of the subjects in our study. Conclusions There was approximately 5% plane-dependent error in liver VP on CT volumetry. Plane-dependent error in VP exceeded 10% of W in approximately 10% of LDLT donors in our study. This error should be considered, especially when CT volumetry is performed by a less experienced operator who is not well acquainted with the donor hepatectomy plane.
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Affiliation(s)
- Heon-Ju Kwon
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyoung Won Kim
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Bohyun Kim
- Department of Radiology, Ajou University Hospital, Suwon, Korea
| | - So Yeon Kim
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Chul Seung Lee
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jeongjin Lee
- School of Computer Science & Engineering, Soongsil University, Seoul, Korea
| | - Gi Won Song
- Division of Hepatobiliary and Liver Transplantation Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung Gyu Lee
- Division of Hepatobiliary and Liver Transplantation Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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26
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Choi SH, Kwon JH, Kim KW, Jang HY, Kim JH, Kwon HJ, Lee J, Song GW, Lee SG. Measurement of liver volumes by portal vein flow by Doppler ultrasound in living donor liver transplantation. Clin Transplant 2017; 31. [DOI: 10.1111/ctr.13050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Sang Hyun Choi
- Department of Radiology and the Research Institute of Radiology; Seoul Korea
| | - Jae Hyun Kwon
- Division of Liver Transplantation and Hepatobiliary Surgery; Departments of Surgery; University of Ulsan College of Medicine; Asan Medical Center; Seoul Korea
| | - Kyoung Won Kim
- Department of Radiology and the Research Institute of Radiology; Seoul Korea
| | - Hye Young Jang
- Department of Radiology and the Research Institute of Radiology; Seoul Korea
| | - Ji Hye Kim
- Department of Radiology and the Research Institute of Radiology; Seoul Korea
| | - Heon-Ju Kwon
- Department of Radiology; Kangbuk Samsung Hospital; Sungkyunkwan University School of Medicine; Seoul Korea
| | - Jeongjin Lee
- School of Computer Science and Engineering; Soongsil University; Seoul Korea
| | - Gi-Won Song
- Division of Liver Transplantation and Hepatobiliary Surgery; Departments of Surgery; University of Ulsan College of Medicine; Asan Medical Center; Seoul Korea
| | - Sung-Gyu Lee
- Division of Liver Transplantation and Hepatobiliary Surgery; Departments of Surgery; University of Ulsan College of Medicine; Asan Medical Center; Seoul Korea
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Allard MA, Baillié G, Castro-Benitez C, Faron M, Blandin F, Cherqui D, Castaing D, Cunha AS, Adam R, Vibert É. Prediction of the Total Liver Weight using anthropological clinical parameters: does complexity result in better accuracy? HPB (Oxford) 2017; 19:338-344. [PMID: 28043763 DOI: 10.1016/j.hpb.2016.11.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 10/07/2016] [Accepted: 11/30/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND The performance of linear models predicting Total Liver Weight (TLW) remains moderate. The use of more complex models such as Artificial Neural Network (ANN) and Generalized Additive Model (GAM) or including the variable "steatosis" may improve TLW prediction. This study aimed to assess the value of ANN and GAM and the influence of steatosis for predicting TLW. METHODS Basic clinical and morphological variables of 1560 cadaveric donors for liver transplantation were randomly split into a training (2/3) and validation set (1/3). Linear models, ANN and GAM were built by using the training cohort and evaluated with the validation cohort. RESULTS The TLW is subject to major variations among donors with similar morphological parameters. The performance of ANN and GAM were moderate and similar to that of linear models (concordance coefficient from 0.36 to 0.44). In 28-30% of cases, TLW cannot be predicted with a margin of error ≤20%. The addition of the variable "steatosis" to each model did not improve their performance. CONCLUSION TLW prediction based on anthropological parameters carry a significant risk of error despite the use of more complex models. Others determinants of TLW need to be identified and imaging-based volumetric measurements should be preferred when feasible.
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Affiliation(s)
- Marc-Antoine Allard
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France; University of Paris-Sud, Villejuif, F-94800, France; INSERM, Unit UMRS776, Villejuif, F-94800, France.
| | - Gaëlle Baillié
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France
| | - Carlos Castro-Benitez
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France; INSERM, Unit 1193, Villejuif, F-94800, France
| | - Matthieu Faron
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France
| | - Frédérique Blandin
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France
| | - Daniel Cherqui
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France; INSERM, Unit 1193, Villejuif, F-94800, France; University of Paris-Sud, Villejuif, F-94800, France
| | - Denis Castaing
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France; INSERM, Unit 1193, Villejuif, F-94800, France; University of Paris-Sud, Villejuif, F-94800, France
| | - Antonio Sa Cunha
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France; INSERM, Unit 1193, Villejuif, F-94800, France; University of Paris-Sud, Villejuif, F-94800, France
| | - René Adam
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France; University of Paris-Sud, Villejuif, F-94800, France; INSERM, Unit UMRS776, Villejuif, F-94800, France
| | - Éric Vibert
- Centre Hépato-Biliaire, Paul Brousse Hospital, AP-HP, Villejuif, F-94800, France; INSERM, Unit 1193, Villejuif, F-94800, France; University of Paris-Sud, Villejuif, F-94800, France
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28
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Yang X, Chu C, Yang J, Yang K, Yu H, Cho B, You H. Estimation of Right-Lobe Graft Weight From Computed Tomographic Volumetry for Living Donor Liver Transplantation. Transplant Proc 2017; 49:303-308. [DOI: 10.1016/j.transproceed.2016.12.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 12/13/2016] [Indexed: 02/07/2023]
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Preoperative evaluation of liver volume in living donor liver transplantation. North Clin Istanb 2017; 5:1-5. [PMID: 29607424 PMCID: PMC5864700 DOI: 10.14744/nci.2017.14227] [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: 08/02/2017] [Accepted: 09/07/2017] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE: The aim of the present study was to retrospectively evaluate the difference between the preoperative estimated volume and the actual intraoperative graft volume determined in donor right hepatectomies and to evaluate the possible effect of age, gender, and body mass index on the difference. METHODS: A total of 225 donor hepatectomies performed at the center between 2016 and 2017 were evaluated for the study. Left hepatectomies and left lateral segmentectomies were excluded from the analysis. As a result, 174 donor right hepatectomies were included in the study. Volumetric analysis was performed with dynamic hepatic computed tomography (CT), including non-contrast analysis, followed by non-ionic, contrast-enhanced arterial, portal, and hepatic-phase, thin-slice scanning. Volumetric analysis was performed based on the CT images using automatic volume calculating software. RESULTS: The mean preoperatively estimated graft volume was 800±112 g and the mean intraoperatively measured actual graft volume was 750±131 g. There was a statistically significant difference (p=0.003). Age and body mass index had a significant impact on the discrepancy between the predicted and actual graft volume, while gender did not. CONCLUSION: A thorough preoperative evaluation of the donor graft volume should be performed in order to prevent donor morbidity and mortality, as well as small-for-size and large-for-size phenomena in the implanted grafts. Physicians working in the field of transplantation should be aware of the fact that a difference of 10% between the predicted and the actual graft volume is usually encountered.
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30
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Huynh HT, Le-Trong N, Bao PT, Oto A, Suzuki K. Fully automated MR liver volumetry using watershed segmentation coupled with active contouring. Int J Comput Assist Radiol Surg 2016; 12:235-243. [PMID: 27873147 DOI: 10.1007/s11548-016-1498-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 10/28/2016] [Indexed: 12/16/2022]
Abstract
PURPOSE Our purpose is to develop a fully automated scheme for liver volume measurement in abdominal MR images, without requiring any user input or interaction. METHODS The proposed scheme is fully automatic for liver volumetry from 3D abdominal MR images, and it consists of three main stages: preprocessing, rough liver shape generation, and liver extraction. The preprocessing stage reduced noise and enhanced the liver boundaries in 3D abdominal MR images. The rough liver shape was revealed fully automatically by using the watershed segmentation, thresholding transform, morphological operations, and statistical properties of the liver. An active contour model was applied to refine the rough liver shape to precisely obtain the liver boundaries. The liver volumes calculated by the proposed scheme were compared to the "gold standard" references which were estimated by an expert abdominal radiologist. RESULTS The liver volumes computed by using our developed scheme excellently agreed (Intra-class correlation coefficient was 0.94) with the "gold standard" manual volumes by the radiologist in the evaluation with 27 cases from multiple medical centers. The running time was 8.4 min per case on average. CONCLUSIONS We developed a fully automated liver volumetry scheme in MR, which does not require any interaction by users. It was evaluated with cases from multiple medical centers. The liver volumetry performance of our developed system was comparable to that of the gold standard manual volumetry, and it saved radiologists' time for manual liver volumetry of 24.7 min per case.
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Affiliation(s)
- Hieu Trung Huynh
- Faculty of Information Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Ngoc Le-Trong
- Faculty of Information Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam.,Faculty of Information Technology, University of Science, Ho Chi Minh City, Vietnam
| | - Pham The Bao
- Faculty of Information Technology, University of Science, Ho Chi Minh City, Vietnam.,Faculty of Mathematics and Computer Science, University of Science, Ho Chi Minh City, Vietnam
| | - Aytek Oto
- Department of Radiology, The University of Chicago, Chicago, IL, 60637, USA
| | - Kenji Suzuki
- Medical Imaging Research Center, Illinois Institute of Technology, Chicago, IL, 60616, USA
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31
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Lodewick TM, Arnoldussen CW, Lahaye MJ, van Mierlo KM, Neumann UP, Beets-Tan RG, Dejong CH, van Dam RM. Fast and accurate liver volumetry prior to hepatectomy. HPB (Oxford) 2016; 18:764-72. [PMID: 27593594 PMCID: PMC5011086 DOI: 10.1016/j.hpb.2016.06.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 06/05/2016] [Accepted: 06/11/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND Volumetric assessment of the liver is essential in the prevention of postresectional liver failure after partial hepatectomy. Currently used methods are accurate but time-consuming. This study aimed to test a new automated method for preoperative volumetric liver assessment. METHODS Patients who underwent a contrast enhanced portovenous phase CT-scan prior to hepatectomy in 2012 were included. Total liver volume (TLV) and future remnant liver volume (FRLV) were measured using TeraRecon Aquarius iNtuition(®) (autosegmentation) and OsiriX(®) (manual segmentation) software by two observers for each software package. Remnant liver volume percentage (RLV%) was calculated. Time needed to determine TLV and FRLV was measured. Inter-observer variability was assessed using Bland-Altman plots. RESULTS Twenty-seven patients were included. There were no significant differences in measured volumes between OsiriX(®) and iNtuition(®). Moreover, there were significant correlations between the OsiriX(®) observers, the iNtuition(®) observers and between OsiriX(®) and iNtuition(®) post-processing systems (all R(2) > 0.97). The median time needed for complete liver volumetric analysis was 18.4 ± 4.9 min with OsiriX(®) and 5.8 ± 1.7 min using iNtuition(®) (p < 0.001). CONCLUSION Both OsiriX(®) and iNtuition(®) liver volumetry are accurate and easily applicable. However, volumetric assessment of the liver with iNtuition(®) auto-segmentation is three times faster compared to manual OsiriX(®) volumetry.
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Affiliation(s)
- Toine M. Lodewick
- Department of Surgery, Maastricht University Medical Center & NUTRIM School of Nutrition & Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands,Department of Surgery, University Hospital Aachen, Division of General, Visceral and Transplantation Surgery, Aachen, Germany,Correspondence Toine M. Lodewick, Department of Surgery, Maastricht University, PO Box 616, 6200 MD, Maastricht, The Netherlands. Tel: +31 43 3881547, +31 43 3875473.Department of SurgeryMaastricht UniversityPO Box 616Maastricht6200 MDThe Netherlands
| | | | - Max J. Lahaye
- Department of Radiology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Kim M.C. van Mierlo
- Department of Surgery, Maastricht University Medical Center & NUTRIM School of Nutrition & Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Ulf P. Neumann
- Department of Surgery, Maastricht University Medical Center & NUTRIM School of Nutrition & Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands,Department of Surgery, University Hospital Aachen, Division of General, Visceral and Transplantation Surgery, Aachen, Germany
| | - Regina G. Beets-Tan
- Department of Radiology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Cornelis H.C. Dejong
- Department of Surgery, Maastricht University Medical Center & NUTRIM School of Nutrition & Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands,Department of Surgery, University Hospital Aachen, Division of General, Visceral and Transplantation Surgery, Aachen, Germany
| | - Ronald M. van Dam
- Department of Surgery, Maastricht University Medical Center & NUTRIM School of Nutrition & Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands,Department of Surgery, University Hospital Aachen, Division of General, Visceral and Transplantation Surgery, Aachen, Germany
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Marubashi S, Nagano H, Eguchi H, Wada H, Asaoka T, Tomimaru Y, Tomokuni A, Umeshita K, Doki Y, Mori M. Minimum graft size calculated from preoperative recipient status in living donor liver transplantation. Liver Transpl 2016; 22:599-606. [PMID: 26684397 DOI: 10.1002/lt.24388] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/10/2015] [Accepted: 12/01/2015] [Indexed: 02/07/2023]
Abstract
Small-for-size graft syndrome is an inevitable complication in living donor liver transplantation (LDLT). We hypothesized that graft weight (GW) measured after graft procurement is one of the variables predicting postoperative graft function. A total of 138 consecutive recipients of adult-to-adult LDLT between March 1999 and October 2014 were included in this study. We investigated the factors associated with small-for-size-associated graft loss (SAGL) to determine the GW required for each patient. Both preoperatively assessed and postoperatively obtained risk factors for SAGL were analyzed in univariate and multivariate logistic regression analysis. Twelve (8.8%) of the transplant recipients had SAGL. In multivariate logistic regression analyses using preoperatively assessed variables, the preoperative Model for End-Stage Liver Disease (MELD) score (P < 0.001) and actual GW/recipient standard liver volume (SLV) ratio (P = 0.008) were independent predictors of SAGL. The recommended graft volume by preoperative computed tomography volumetry was calculated as SLV × (1.616 × MELD + 0.344)/100/0.85 (mL) [MELD ≥ 18.2], or SLV × 0.35 (mL) [MELD < 18.2]. The required allograft volume in LDLT can be determined by the preoperative MELD score of the recipient, and patients with higher MELD scores require larger grafts or deceased donor whole liver transplant to avoid SAGL. Liver Transplantation 22 599-606 2016 AASLD.
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Affiliation(s)
- Shigeru Marubashi
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hiroaki Nagano
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hidetoshi Eguchi
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hiroshi Wada
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tadafumi Asaoka
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yoshito Tomimaru
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Akira Tomokuni
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Koji Umeshita
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yuichiro Doki
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Masaki Mori
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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Nitschke P, Bork U, Plodeck V, Podlesek D, Sobottka SB, Schackert G, Weitz J, Kirsch M. [Importance of preoperative and intraoperative imaging for operative strategies]. Chirurg 2016; 87:179-88. [PMID: 26939896 DOI: 10.1007/s00104-016-0163-8] [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] [Indexed: 11/30/2022]
Abstract
Recent advances in preoperative and postoperative imaging have an increasing influence on surgical decision-making and make more complex surgical interventions possible. This improves the possibilities for frequently occurring challenges and promoting improved functional and oncological outcome. This manuscript reviews the role of preoperative and intraoperative imaging in surgery. Various techniques are explained based on examples from hepatobiliary surgery and neurosurgery, in particular real-time procedures, such as the online use of augmented reality and in vivo fluorescence, as well as new and promising optical techniques including imaging of intrinsic signals and vibrational spectroscopy.
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Affiliation(s)
- P Nitschke
- Klinik und Poliklinik für Viszeral-, Thorax- und Gefäßchirurgie, Carl Gustav Carus Universitätsklinikum Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland
| | - U Bork
- Klinik und Poliklinik für Viszeral-, Thorax- und Gefäßchirurgie, Carl Gustav Carus Universitätsklinikum Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland
| | - V Plodeck
- Institut für Radiologie, Carl Gustav Carus Universitätsklinikum Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland
| | - D Podlesek
- Klinik und Poliklinik für Neurochirurgie und Experimental Neuroimaging Laboratory, Carl Gustav Carus Universitätsklinikum Dresden, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland
| | - S B Sobottka
- Klinik und Poliklinik für Neurochirurgie und Experimental Neuroimaging Laboratory, Carl Gustav Carus Universitätsklinikum Dresden, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland
| | - G Schackert
- Klinik und Poliklinik für Neurochirurgie und Experimental Neuroimaging Laboratory, Carl Gustav Carus Universitätsklinikum Dresden, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland
| | - J Weitz
- Klinik und Poliklinik für Viszeral-, Thorax- und Gefäßchirurgie, Carl Gustav Carus Universitätsklinikum Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland
| | - M Kirsch
- Klinik und Poliklinik für Neurochirurgie und Experimental Neuroimaging Laboratory, Carl Gustav Carus Universitätsklinikum Dresden, Technische Universität Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland.
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34
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Samstein B, Klair T. Living Donor Liver Transplantation: Donor Selection and Living Donor Hepatectomy. CURRENT SURGERY REPORTS 2015. [DOI: 10.1007/s40137-015-0107-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Suzuki K, Huynh HT, Liu Y, Calabrese D, Zhou K, Oto A, Hori M. Computerized segmentation of liver in hepatic CT and MRI by means of level-set geodesic active contouring. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2013:2984-7. [PMID: 24110354 DOI: 10.1109/embc.2013.6610167] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Computerized liver volumetry has been studied, because the current "gold-standard" manual volumetry is subjective and very time-consuming. Liver volumetry is done in either CT or MRI. A number of researchers have developed computerized liver segmentation in CT, but there are fewer studies on ones for MRI. Our purpose in this study was to develop a general framework for liver segmentation in both CT and MRI. Our scheme consisted of 1) an anisotropic diffusion filter to reduce noise while preserving liver structures, 2) a scale-specific gradient magnitude filter to enhance liver boundaries, 3) a fast-marching algorithm to roughly determine liver boundaries, and 4) a geodesic-active-contour model coupled with a level-set algorithm to refine the initial boundaries. Our CT database contained hepatic CT scans of 18 liver donors obtained under a liver transplant protocol. Our MRI database contains 23 patients with 1.5T MRI scanners. To establish "gold-standard" liver volumes, radiologists manually traced the contour of the liver on each CT or MR slice. We compared our computer volumetry with "gold-standard" manual volumetry. Computer volumetry in CT and MRI reached excellent agreement with manual volumetry (intra-class correlation coefficient = 0.94 and 0.98, respectively). Average user time for computer volumetry in CT and MRI was 0.57 ± 0.06 and 1.0 ± 0.13 min. per case, respectively, whereas those for manual volumetry were 39.4 ± 5.5 and 24.0 ± 4.4 min. per case, respectively, with statistically significant difference (p < .05). Our computerized liver segmentation framework provides an efficient and accurate way of measuring liver volumes in both CT and MRI.
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Lim MC, Tan CH, Cai J, Zheng J, Kow AWC. CT volumetry of the liver: where does it stand in clinical practice? Clin Radiol 2014; 69:887-95. [PMID: 24824973 DOI: 10.1016/j.crad.2013.12.021] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 12/14/2013] [Accepted: 12/17/2013] [Indexed: 02/07/2023]
Abstract
Imaging-based volumetry has been increasingly utilised in current clinical practice to obtain accurate measurements of the liver volume. This is particularly useful prior to major hepatic resection and living donor liver transplantation where the size of the remnant liver and liver graft, respectively, affects procedural success and postoperative mortality and morbidity. The use of imaging-based volumetry, with emphasis on computed tomography, will be reviewed. We will explore the various technical factors that contribute to accurate volumetric measurements, and demonstrate how the accuracies of these techniques are influenced by their methodologies. The strengths and limitations of using anatomical imaging to estimate liver volume will be discussed, in relation to laboratory and functional imaging methods of assessment.
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Affiliation(s)
- M C Lim
- Department of Diagnostic Radiology, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore.
| | - C H Tan
- Department of Diagnostic Radiology, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore
| | - J Cai
- School of Computer Engineering, Nanyang Technological University, Block N4 Nanyang Avenue #02a-32, Singapore 639798, Singapore
| | - J Zheng
- School of Computer Engineering, Nanyang Technological University, Block N4 Nanyang Avenue #02a-32, Singapore 639798, Singapore
| | - A W C Kow
- University Surgical Cluster, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074, Singapore
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Computerized liver volumetry on MRI by using 3D geodesic active contour segmentation. AJR Am J Roentgenol 2014; 202:152-9. [PMID: 24370139 DOI: 10.2214/ajr.13.10812] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Our purpose was to develop an accurate automated 3D liver segmentation scheme for measuring liver volumes on MRI. SUBJECTS AND METHODS Our scheme for MRI liver volumetry consisted of three main stages. First, the preprocessing stage was applied to T1-weighted MRI of the liver in the portal venous phase to reduce noise and produce the boundary-enhanced image. This boundary-enhanced image was used as a speed function for a 3D fast-marching algorithm to generate an initial surface that roughly approximated the shape of the liver. A 3D geodesic-active-contour segmentation algorithm refined the initial surface to precisely determine the liver boundaries. The liver volumes determined by our scheme were compared with those manually traced by a radiologist, used as the reference standard. RESULTS The two volumetric methods reached excellent agreement (intraclass correlation coefficient, 0.98) without statistical significance (p = 0.42). The average (± SD) accuracy was 99.4% ± 0.14%, and the average Dice overlap coefficient was 93.6% ± 1.7%. The mean processing time for our automated scheme was 1.03 ± 0.13 minutes, whereas that for manual volumetry was 24.0 ± 4.4 minutes (p < 0.001). CONCLUSION The MRI liver volumetry based on our automated scheme agreed excellently with reference-standard volumetry, and it required substantially less completion time.
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Elrakhawy MM, Eid NKE, Wahab MA, Mousa AE, Helmy EM. Multidetector CT in pre- and post-operative evaluation of living-related liver transplantation. THE EGYPTIAN JOURNAL OF RADIOLOGY AND NUCLEAR MEDICINE 2013. [DOI: 10.1016/j.ejrnm.2013.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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ALPPS in right trisectionectomy: a safe procedure to avoid postoperative liver failure? J Gastrointest Surg 2013; 17:956-61. [PMID: 23288719 DOI: 10.1007/s11605-012-2132-y] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Accepted: 12/12/2012] [Indexed: 01/31/2023]
Abstract
INTRODUCTION To induce rapid hepatic hypertrophy and to reduce post-hepatectomy liver failure (PHLF), associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) has been recently developed for patients with a limited future liver remnant. The aim of this study was to further assess the perioperative risk of this procedure and its specific indications. PATIENTS AND METHODS The study was performed between November 2010 and April 2012 for patients undergoing right trisectionectomy by the ALPPS approach. Liver volume, intra- and postoperative complications, including PHLF, and residual tumour status were compared for patients with different diagnoses. RESULTS The interval between two operations in nine patients undergoing ALPPS was 13 days (median). Sufficient hepatic hypertrophy was achieved with a volume gain of 87.2 % (median). All patients underwent right trisectionectomy without residual tumours. In contrast to six patients with uneventful intra- and postoperative course, bile leak, vancomycin-resistant enterococcus infection, PHLF and sepsis developed in two of three patients with hilar cholangiocarcinoma as the preoperative diagnosis. CONCLUSION ALPPS leads to sufficient hepatic hypertrophy within 2 weeks, avoiding PHLF in most patients. In patients with hilar cholangiocarcinoma, ALPPS should be applied with extreme caution due to high morbidity and mortality.
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Peron G, Salzedas Netto AA, Mancero JP, Ribeiro MAF, Copstein JL, de Oliveira E Silva A, D'Albuquerque LAC, Gonzalez AM. Relationship between preoperative volume and weight of the right liver lobe graft, with and without the middle hepatic vein, in living-donor transplantation. World J Surg 2012; 37:202-7. [PMID: 22976791 DOI: 10.1007/s00268-012-1778-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND The aim of this study was to assess the relationship between the preoperative volume of the right liver lobe (as determined by computed tomography) and the intraoperative graft weight with or without the middle hepatic vein. METHODS Sixty-three patients who underwent liver transplantation were included in this study. The preoperative volumes of both the left and the right liver lobe were measured in all patients using computed tomography. The intraoperative weight of the right liver lobe was also measured with (group 1, n = 29) and without (group 2, n = 34) the middle hepatic vein. The results were compared with respect to gender, age, body weight, height, body mass index (BMI), weights of the left and right liver lobes as measured by computed tomography, and intraoperative weight of the right liver lobe. RESULTS A 21.64 % difference was observed between the weight of the right liver lobe as measured by computed tomography and the weight of the right lobe without the hepatic vein as measured intraoperatively (group 2). Moreover, a 12.38 % difference was observed between the weight of the right liver lobe as measured by computed tomography and the weight of the right lobe plus the middle hepatic vein as measured intraoperatively (group 1). CONCLUSIONS The weight of the right liver lobe graft in a living-donor transplantation is less than that calculated by preoperative computed tomography, and the inclusion of the middle hepatic vein in the right liver lobe graft resulted in a statistically significant decrease in this difference.
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Affiliation(s)
- Gilberto Peron
- CETEFI-Centro Terapêutico Especializado em Fígado, Hospital Beneficência Portuguesa de São Paulo, São Paulo, Brazil.
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Pomposelli JJ, Tongyoo A, Wald C, Pomfret EA. Variability of standard liver volume estimation versus software-assisted total liver volume measurement. Liver Transpl 2012; 18:1083-92. [PMID: 22532341 DOI: 10.1002/lt.23461] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The estimation of the standard liver volume (SLV) is an important component of the evaluation of potential living liver donors and the surgical planning for resection for tumors. At least 16 different formulas for estimating SLV have been published in the worldwide literature. More recently, several proprietary software-assisted image postprocessing (SAIP) programs have been developed to provide accurate volume measurements based on the actual anatomy of a specific patient. Using SAIP, we measured SLV in 375 healthy potential liver donors and compared the results to SLV values that were estimated with the previously published formulas and each donor's demographic and anthropomorphic data. The percentage errors of the 16 SLV formulas versus SAIP varied by more than 59% (from -21.6% to +37.7%). One formula was not statistically different from SAIP with respect to the percentage error (-1.2%), and another formula was not statistically different with respect to the absolute liver volume (18 mL). More than 75% of the estimated SLV values produced by these 2 formulas had percentage errors within ±15%, and the formulas provided good predictions within acceptable agreement (±15%) on scatter plots. Because of the wide variability, care must be taken when a formula is being chosen for estimating SLV, but the 2 aforementioned formulas provided the most accurate results with our patient demographics.
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Affiliation(s)
- James J Pomposelli
- Department of Transplantation and Hepatobiliary Diseases, Lahey Clinic Medical Center, Burlington, MA 01805, USA.
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Lock JF, Malinowski M, Seehofer D, Hoppe S, Röhl RI, Niehues SM, Neuhaus P, Stockmann M. Function and volume recovery after partial hepatectomy: influence of preoperative liver function, residual liver volume, and obesity. Langenbecks Arch Surg 2012; 397:1297-304. [PMID: 22729717 DOI: 10.1007/s00423-012-0972-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 06/05/2012] [Indexed: 02/08/2023]
Abstract
BACKGROUND The regenerative capacity of the liver is an essential pre-condition for the successful application of partial hepatectomy. However, the actual kinetics of functional recovery remains unspecified and no adequate tool for its clinical monitoring has yet been available. METHODS Eighty-five patients receiving major hepatectomy were investigated from the preoperative evaluation until 12 weeks after surgery. Liver function was determined by the LiMAx test for the enzymatic capacity of cytochrome P450 1A2. Liver volume was determined by volumetric analysis of repeated computer tomography scans. Functional and volume recovery were compared during follow-up. RESULTS Major hepatectomy decreased liver function capacity to 35.7 ± 13.8% of preoperative function. It was shown that functional recovery already reaches 77.2 ± 33.5% of preoperative values within 10 days. The actual kinetics were dependent from the type and extent of hepatectomy. Complete functional restoration was achieved within 12 weeks, while liver volume still remained at 73.2 ± 14.8% of preoperative. A constant but interindividually variable correlation between function and volume was observed at all points in time. CONCLUSION Partial hepatectomy leads to fast and complete functional recovery, while volume recovery is delayed and remains often incomplete. The functional recovery is mainly influenced by the preoperative liver function, the residual liver volume, and by obesity.
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Affiliation(s)
- Johan Friso Lock
- Department of General, Visceral and Transplantation Surgery, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany.
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Tongyoo A, Pomfret EA, Pomposelli JJ. Accurate estimation of living donor right hemi-liver volume from portal vein diameter measurement and standard liver volume calculation. Am J Transplant 2012; 12:1229-39. [PMID: 22221803 DOI: 10.1111/j.1600-6143.2011.03909.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Lee et al. recently published a method for estimating right hemi-liver volume (RHLV) by using bedside ultrasound measurement of right (R) and left (L) portal vein (PV) diameters and Urata's standard liver volume (SLV) formula where RHLV = SLV×[R(2) /(R(2) +L(2) )]. We calculated RHLV by substituting SLV from 15 different published formulas in the worldwide literature. We also modified Lee's method using right anterior (RA) and posterior (RP) where RHLV = SLV×[(RA(2) +RP(2) )/(RA(2) +RP(2) +L(2) )] for donors with unusual PV branching. We compared the calculated RHLV with RHLV estimated with software-assisted CT (SACT) volumetry and actual graft weight after right-lobe donation in 200 right-lobe donors. This study confirmed that accurate estimates of RHLV can be achieved by SACT volumetry or by the simple method of Lee but using the SLV of only 3 of the 15 published formulas (Lin or Vauthey using body weight or body surface area) rather than Urata's. Our modification of the Lee's formula using RA and RP, PV diameters was also accurate and not different from Lee's formula. These simplified formulas may be used for donor screening for graft size adequacy before expensive evaluation proceeds.
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Affiliation(s)
- A Tongyoo
- Department of Transplantation and Hepatobiliary Diseases, Lahey Clinic Medical Center, Burlington, MA, USA
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Quantitative radiology: automated CT liver volumetry compared with interactive volumetry and manual volumetry. AJR Am J Roentgenol 2011; 197:W706-12. [PMID: 21940543 DOI: 10.2214/ajr.10.5958] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVE The purpose of this study was to evaluate automated CT volumetry in the assessment of living-donor livers for transplant and to compare this technique with software-aided interactive volumetry and manual volumetry. MATERIALS AND METHODS Hepatic CT scans of 18 consecutively registered prospective liver donors were obtained under a liver transplant protocol. Automated liver volumetry was developed on the basis of 3D active-contour segmentation. To establish reference standard liver volumes, a radiologist manually traced the contour of the liver on each CT slice. We compared the results obtained with automated and interactive volumetry with those obtained with the reference standard for this study, manual volumetry. RESULTS The average interactive liver volume was 1553 ± 343 cm(3), and the average automated liver volume was 1520 ± 378 cm(3). The average manual volume was 1486 ± 343 cm(3). Both interactive and automated volumetric results had excellent agreement with manual volumetric results (intraclass correlation coefficients, 0.96 and 0.94). The average user time for automated volumetry was 0.57 ± 0.06 min/case, whereas those for interactive and manual volumetry were 27.3 ± 4.6 and 39.4 ± 5.5 min/case, the difference being statistically significant (p < 0.05). CONCLUSION Both interactive and automated volumetry are accurate for measuring liver volume with CT, but automated volumetry is substantially more efficient.
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de Graaf W, van den Esschert JW, van Lienden KP, Roelofs JJ, van Gulik TM. A Rabbit Model for Selective Portal Vein Embolization. J Surg Res 2011; 171:486-94. [DOI: 10.1016/j.jss.2010.04.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 04/07/2010] [Accepted: 04/16/2010] [Indexed: 02/08/2023]
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Müller SA, Pianka F, Schöbinger M, Mehrabi A, Fonouni H, Radeleff B, Meinzer HP, Schmied BM. Computer-Based Liver Volumetry in the Liver Perfusion Simulator. J Surg Res 2011; 171:87-93. [PMID: 20462596 DOI: 10.1016/j.jss.2010.02.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2010] [Revised: 02/03/2010] [Accepted: 02/25/2010] [Indexed: 01/01/2023]
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Wang F, Pan KT, Chu SY, Chan KM, Chou HS, Wu TJ, Lee WC. Preoperative estimation of the liver graft weight in adult right lobe living donor liver transplantation using maximal portal vein diameters. Liver Transpl 2011; 17:373-80. [PMID: 21445920 DOI: 10.1002/lt.22274] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An accurate preoperative estimate of the graft weight is vital to avoid small-for-size syndrome in the recipient and ensure donor safety after adult living donor liver transplantation (LDLT). Here we describe a simple method for estimating the graft volume (GV) that uses the maximal right portal vein diameter (RPVD) and the maximal left portal vein diameter (LPVD). Between June 2004 and December 2009, 175 consecutive donors undergoing right hepatectomy for LDLT were retrospectively reviewed. The GV was determined with 3 estimation methods: (1) the radiological graft volume (RGV) estimated by computed tomography (CT) volumetry; (2) the computed tomography-calculated graft volume (CGV-CT), which was obtained by the multiplication of the standard liver volume (SLV) by the RGV percentage with respect to the total liver volume derived from CT; and (3) the portal vein diameter ratio-calculated graft volume (CGV-PVDR), which was obtained by the multiplication of the SLV by the portal vein diameter ratio [PVDR; ie, PVDR = RPVD(2) /(RPVD(2) + LPVD(2) )]. These values were compared to the actual graft weight (AGW), which was measured intraoperatively. The mean AGW was 633.63 ± 107.51 g, whereas the mean RGV, CGV-CT, and CGV-PVDR values were 747.83 ± 138.59, 698.21 ± 94.81, and 685.20 ± 90.88 cm(3) , respectively. All 3 estimation methods tended to overestimate the AGW (P < 0.001). The actual graft-to-recipient body weight ratio (GRWR) was 1.00% ± 0.19%, and the GRWRs calculated on the basis of the RGV, CGV-CT, and CGV-PVDR values were 1.19% ± 0.25%, 1.11% ± 0.22%, and 1.09% ± 0.21%, respectively. Overall, the CGV-PVDR values better correlated with the AGW and GRWR values according to Lin's concordance correlation coefficient and the Landis and Kock benchmark. In conclusion, the PVDR method is a simple estimation method that accurately predicts GVs and GRWRs in adult LDLT.
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Affiliation(s)
- Frank Wang
- Division of Liver and Transplantation Surgery, Department of General Surgery, Taoyuan, Taiwan
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Satou S, Sugawara Y, Tamura S, Yamashiki N, Kaneko J, Aoki T, Hasegawa K, Beck Y, Makuuchi M, Kokudo N. Discrepancy between estimated and actual weight of partial liver graft from living donors. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2011; 18:586-91. [DOI: 10.1007/s00534-011-0374-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Shouichi Satou
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Yasuhiko Sugawara
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Sumihito Tamura
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Noriyo Yamashiki
- Organ Transplantation Service; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Junichi Kaneko
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Taku Aoki
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Kiyoshi Hasegawa
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Yoshifumi Beck
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
| | - Masatoshi Makuuchi
- Department of Surgery; Japanese Red Cross Medical Center; 4-1-22 Hiro-o Shibuya-ku, Tokyo 150-8935 Japan
| | - Norihiro Kokudo
- Artificial Organ and Transplantation Surgery Division, Department of Surgery, Graduate School of Medicine; University of Tokyo; 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655 Japan
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Pianka F, Baumhauer M, Stein D, Radeleff B, Schmied BM, Meinzer HP, Müller SA. Liver tissue sparing resection using a novel planning tool. Langenbecks Arch Surg 2010; 396:201-8. [PMID: 21161546 DOI: 10.1007/s00423-010-0734-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Accepted: 12/01/2010] [Indexed: 01/05/2023]
Abstract
PURPOSE Accurate preoperative prediction of liver function, volume, and vessel anatomy is essential in preventing postoperative liver failure, optimizing safety, and ensuring optimal outcome in patients undergoing hepatic surgery. We propose that preoperative resection planning provides useful anatomical and volumetric data, allowing for sparing of liver tissue in surgical resections. The purpose of the present study was to evaluate the use of a novel resection planning tool. METHODS Thirteen patients undergoing hemihepatectomy were included. Preoperative resection planning was performed using the commercially available software Mint Liver. During resection planning, virtual resections were calculated based on Couinaud classification, Cantlie's line (standard), and individually by the operating surgeon (individual). Intraoperatively, volume and weight of the resected specimen were measured. A 14-day follow-up was conducted, and laboratory parameters were collected. Statistical analysis was performed, comparing virtual resection volumes (i.e., standard vs. individual) and secondarily virtual vs. actual resection volume. RESULTS We found a significant difference (p = 0.001) in the comparison of standard vs. individual in all 13 cases, with an average 92.8 mL smaller resected volume, sparing 11.3% of liver parenchyma with virtual resection. No patients suffered from acute liver failure. Perioperative mortality was 0%. CONCLUSION Mint Liver is capable of acquiring exact anatomical and volumetric knowledge prior to hepatic resections. Liver parenchyma can be spared by preoperative assessment of the resection plan. We propose that this tool could be an important addition to preoperative patient evaluation, especially in complex liver surgery and living donor liver transplantation where precise volumetry is the decisive factor.
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Affiliation(s)
- Frank Pianka
- Department of General, Visceral and Transplant Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
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Suzuki K, Kohlbrenner R, Epstein ML, Obajuluwa AM, Xu J, Hori M. Computer-aided measurement of liver volumes in CT by means of geodesic active contour segmentation coupled with level-set algorithms. Med Phys 2010; 37:2159-66. [PMID: 20527550 DOI: 10.1118/1.3395579] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Computerized liver extraction from hepatic CT images is challenging because the liver often abuts other organs of a similar density. The purpose of this study was to develop a computer-aided measurement of liver volumes in hepatic CT. METHODS The authors developed a computerized liver extraction scheme based on geodesic active contour segmentation coupled with level-set contour evolution. First, an anisotropic diffusion filter was applied to portal-venous-phase CT images for noise reduction while preserving the liver structure, followed by a scale-specific gradient magnitude filter to enhance the liver boundaries. Then, a nonlinear grayscale converter enhanced the contrast of the liver parenchyma. By using the liver-parenchyma-enhanced image as a speed function, a fast-marching level-set algorithm generated an initial contour that roughly estimated the liver shape. A geodesic active contour segmentation algorithm coupled with level-set contour evolution refined the initial contour to define the liver boundaries more precisely. The liver volume was then calculated using these refined boundaries. Hepatic CT scans of 15 prospective liver donors were obtained under a liver transplant protocol with a multidetector CT system. The liver volumes extracted by the computerized scheme were compared to those traced manually by a radiologist, used as "gold standard." RESULTS The mean liver volume obtained with our scheme was 1504 cc, whereas the mean gold standard manual volume was 1457 cc, resulting in a mean absolute difference of 105 cc (7.2%). The computer-estimated liver volumetrics agreed excellently with the gold-standard manual volumetrics (intraclass correlation coefficient was 0.95) with no statistically significant difference (F = 0.77; p(F < or = f) = 0.32). The average accuracy, sensitivity, specificity, and percent volume error were 98.4%, 91.1%, 99.1%, and 7.2%, respectively. Computerized CT liver volumetry would require substantially less completion time (compared to an average of 39 min per case by manual segmentation). CONCLUSIONS The computerized liver extraction scheme provides an efficient and accurate way of measuring liver volumes in CT.
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Affiliation(s)
- Kenji Suzuki
- Department of Radiology, The University of Chicago, 5841 South Maryland Avenue, Chicago, Illinois 60637, USA.
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