本文探討利用圓柱螺旋和阿基米德螺線兩種運動所建立的左心室四維（3D＋時間）運動數學模型模擬左心室在各個時序下的運動，並以電腦斷層影像分析而得之左心室功能參數評估左心室運動數學模型與實際左心室在心動週期時的運動變化之關係。左心室之功能參數由多切面多時序心臟電腦斷層影像之左心室內膜所建構成之4D 立體心臟模型，以實際左心室立體影像當作基礎，評估模擬左心室運動週期變化，觀察建立左心室運動數學模型其容積變化與室壁運動，可評估
分析左心室實際運動效能。本文利用電腦斷層影像將建構左心室內膜4D 立體模型評估分析二十二組非心房顫動之心臟電腦斷層影像分析左心室實際運動效能，分析左心室功能參數來探討左心室在心動週期時的運動變化與模擬之數據比對分析，結果顯示出在各個時序下其平均容積差為2.92±3.09 (ml)，且在模擬容積變化方面相關度為 (r=0.93)。在室壁運動方面，模擬與實際運動在各時序下之平均差異為1.55±0.47 (mm)，評估數據顯示模擬左心室運動及體積變化所推算出的容積與實際左心室容積有非常好的相關性，且在室壁運動模擬也有良好的相似度。

This study modeled the Left Ventricular (LV) motion using parameters of
myocardial twisting angle and shortening of LV long axis. The modeling will enlighten the complexity of LV motion, and, provide clinical applications. The function of the myocardial twisting angle was derived from the LV time-volume curve. The function of the shortening of long axis was derived from actual continuous 3D cardio-images. The
modeling will enlighten the complexity of LV motion, and, provide clinical
applications. The function of the myocardial twisting angle was derived from the LV time-volume curve. The function of the shortening of long axis was derived from actual continuous 3D cardio-images. This result has shown that the LV motion could be modeled using the function of shorten LV long axis and the function of the myocardial twisting angle.