A validation study of Left Ventricular contraction and relaxation model

Author

Hu, WC ; Wang, JJ ; Shyu, LY ; Lin, CC ; Tsao, HM

Author_Institution

Chung Yuan Christian Univ., Chungli, Taiwan

fYear

2009

fDate

13-16 Sept. 2009

Firstpage

785

Lastpage

788

Abstract

This study modeled the Left Ventricular (LV) motion using parameters of myocardial twisting angle and shortening of LV long axis. Twenty two sets of the heart´s volume-time curve (VTC) were analyzed. The ejection fraction (EF) of each data set was evaluated. The average of EF was 70.96 Â± 5.76%. The accuracy of model simulation was evaluated in each time frame. The average difference of volume between simulated LV and 4D cardio real images was 2.92 Â± 3.09 (ml). The correlation of simulated LV volumes to the 4D real cardio images was 0.93. The average difference short axis radius of each time frame in the cardio cycle was 1.55 Â± 0.47 (mm). 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.

Keywords

biomechanics; cardiology; computerised tomography; deformation; image motion analysis; image reconstruction; medical image processing; physiological models; relaxation; 4D cardio CT imaging; ejection fraction; heart volume-time curve; image reconstruction; left ventricular contraction model; left ventricular motion; left ventricular relaxation model; myocardial twisting angle; spiral function; ventricular long axis lengthening periodic function; ventricular long axis shortening periodic function; ventricular shape deformation; ventricular shape motion; Cardiology; Computed tomography; Data mining; Deformable models; Heart; Hospitals; Image reconstruction; Myocardium; Optical wavelength conversion; Spirals;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology, 2009

Conference_Location

Park City, UT

ISSN

0276-6547

Print_ISBN

978-1-4244-7281-9

Electronic_ISBN

0276-6547

Type

conf

Filename

5445265