Accuracy of volumetric measurements after virtual right hepatectomy in potential donors undergoing living adult liver transplantation

OBJECTIVE, The purpose of this study was to evaluate accuracy for determini ng the total and lobar liver volumes using a multidetector CT scanner in po tential donors undergoing living adult right lobe liver transplantation. SUBJECTS AND METHODS. Fifty-two adult donors underwent CT using a multidete ctor scanner after IV injection of 180 mt of contrast material. For volumet ric determination, portal venous phase images were acquired at 60 sec. Hand -tracing was used to isolate the entire liver. and a curved hepatectomy pla ne was then identified in a manner simulating the surgical incision. Two ob servers performed hand-tracing of the entire liver to calculate total liver volume, and of the right lobe to calculate expected graft volume. RESULTS. The mean Volume of the entire liver, right lobe, and left lobe was 1807 mt, 990 mt, and 817 mt, respectively, for observer 1, and 1788 mt. 10 07 mt, and 781 mt, respectively, for observer 2. There was significant agre ement between the two observers in determining total and lobar liver volume s (r = 0.996, 0.977, and 0.965 for total, right lobe, and left lobe volumes , respectively: p < 0.0001). There was no statistically significant differe nce between the two observers in measuring total or lobar liver volumes (p < 0.0001). There was significant agreement between right lobe volume measur ed by each observer and graft weight obtained in 14 donors at surgery (r = 0.898 and 0.879, for observers 1 and 2, respectively; p < 0.001). CONCLUSION. Total and lobar volume determinations after virtual right hemih epatectomy provides accurate and reproducible information that is critical in selecting potential living liver donors.