活体肝移植供者右后叶体积的评估：基于门静脉分割的半自动 CT 容积测量法。

Estimation of the Right Posterior Section Volume in Live Liver Donors: Semiautomated CT Volumetry Using Portal Vein Segmentation.

机构信息

Department of Radiology and the Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-Ro 43-Gil, Songpa-Gu, Seoul 138-736, South Korea.

School of Computer Science and Engineering, Soongsil University, Seoul, South Korea.

出版信息

Acad Radiol. 2020 Feb;27(2):210-218. doi: 10.1016/j.acra.2019.03.018. Epub 2019 May 3.

DOI:10.1016/j.acra.2019.03.018

PMID:31060982

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 (RPSV) and by measurement of standard liver volume (SLV) and PV area ratio (RPSV). 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 RPSV, RPSV, 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. RPSV was strongly correlated with W (r = 0.9414; p < 0.0001), whereas RPSV was only moderately did (r = 0.5899; p = 0.0127). RPSV 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 RPSV and W was W = -74.7191 + 1.1791 RPSV (R = 0.8862; p < 0.001).

CONCLUSION

RPSV yields smaller absolute difference than RPSV 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 RPSV was strongly correlated with W (r = 0.9414; p < 0.0001).

摘要

背景与目的

通过门静脉（PV）分割来确定半自动 CT 体积测量法测量活体肝供体右后叶（RPS）移植物体积的准确性，与术中测量的重量（W）进行比较。

材料与方法

在 2003 年 4 月至 2016 年 8 月期间，我院对 23 例活体供肝者的 RPS 进行了肝移植，其中 17 例供肝者在肝切除前 3 个月内接受了 CT 扫描，PV 解剖类型为 I-III 型。通过半自动 CT 体积测量（RPSV）、标准肝体积（SLV）和 PV 面积比（RPSV）对 RPS 体积进行回顾性评估。对 RPSV、RPSV 和 W 进行相关系数、（绝对）差值和（绝对）百分比偏差的比较。通过线性拟合确定与 W 相关性最大的方法。

结果

RPSV、RPSV 和 W 的平均值分别为 503.4 ± 97.8 mL（346.6-686.0）、516.54 ± 146.20（274.06-776.32）和 518.8 ± 122.4（370.0-789.0）。RPSV 与 W 具有很强的相关性（r=0.9414；p＜0.0001），而 RPSV 仅具有中度相关性（r=0.5899；p=0.0127）。RPSV 与 W 相比，（绝对）差值（35.20 ± 30.82 比 104.79 ± 60.27，p=0.004）和（绝对）百分比偏差（6.61 ± 4.90 比 19.92 ± 10.37，p＜0.0001）明显更小。与 W 相关的 RPSV 方程为 W=-74.7191+1.1791 RPSV（R=0.8862；p＜0.001）。