中华医学杂志(英文版)
中華醫學雜誌(英文版)
중화의학잡지(영문판)
CHINESE MEDICAL JOURNAL
2004年
9期
1283-1287
,共5页
崔炜%近藤武%安野泰史%郭玉印%佐藤贵久%皿井正義%篠崎仁史%柿澤聡士%杉浦厚司%大岛慶太%片田和廣%菱田仁
崔煒%近籐武%安野泰史%郭玉印%佐籐貴久%皿井正義%篠崎仁史%柿澤聡士%杉浦厚司%大島慶太%片田和廣%蔆田仁
최위%근등무%안야태사%곽옥인%좌등귀구%명정정의%소기인사%시택총사%삼포후사%대도경태%편전화광%릉전인
multislice helical computed tomography%ventricular volume%cast%slice thickness
Background Multislice helical computed tomography (MSCT) has been used to depict coronary anatomy noninvasively, and proved useful for evaluating ventricular function. The aim of our study was to assess the accuracy of ventricular volume as measured by MSCT.
Methods Fourteen human left ventricular (LV) and 15 right ventricular (RV) casts were scanned by MSCT. A series of LV and RV short-axis images were reconstructed later with slice thickness of 2.0 mm, 3.5 mm, 5.0 mm, 7.0 mm, and 10.0 mm. Ventricular volume was calculated by the multislice tomographic Simpson's method. True LV and RV cast volumes were determined by water displacement.
Results Both calculated LV and RV volumes correlated highly with the corresponding true volumes (all r>0.95, P<0.01). But with slice thickness from 2.0 mm to 10.0 mm, MSCT scanning overestimated the corresponding true volume by (3.21±5.95) ml to (12.58±8.56) ml for LV and (10.22±8.45) ml to (23.91±12.24) ml for RV (all P<0.01). There was a very high correlation between the overestimation and the selected slice thickness for both LV and RV volume measurements (r=0.998 and 0.996, P<0.01, respectively). However, when slice thickness was reduced to 5.0 mm, the overestimation for both LV and RV volume measurements became nonsignificant for slice thickness from 2.0 mm to 5.0 mm.
Conclusions Both LV and RV volumes can be accurately estimated by MSCT. Thinner slice has more accurate calculated volume. However, 5.0 mm slice thickness is thin enough for an accurate measurement of LV or RV volume.