Related Experiment Video
Updated: May 16, 2026

Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement
Published on: January 20, 2022
[Assessment of the morphological and dynamic features of normal pulmonary valve in a cardiac cycle using dual-source
Liqing Peng1, Jianqun Yu, Zhigang Yang
1Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China.
Abstract:
The purpose of this study was to determine the morphological and dynamic features of normal pulmonary valve by using dual-source CT. Thirty patients who underwent dual-source CT angiography with right ventricular outflow tract well-opacified were enrolled. Ten phases of images were reconstructed at 10% R-R interval, and pulmonary valve area and pulmonary annular diameter were measured on all 10 phases. As the pulmonary valve opened, its orifice appeared as oval or proximate triangle. As the pulmonary valve closed, it appeared as "Y-shape". Pulmonary valve opened from 10% to 30% phases, with maximum pulmonary valve area of (4.74 +/- 0.69) cm2 in 10% phase. Pulmonary valve closed from 40% to 90% phases. Pulmonary annular diameter varied with cardiac cycle, with maximum pulmonary annular diameter of (2.36 +/- 0.24) cm in 0% phase and minimum pulmonary annular diameter of (1.82 +/- 0.32) cm in 40% phase (P < 0.001). The proximal phase for assessing pulmonary valve was 70% phase. Dual-source CT may evaluate the morphological and dynamic features of normal pulmonary valve.
Related Concept Videos
Mitral Stenosis II: Clinical features and Diagnostic Tests
Mitral Regurgitation II: Clinical Features and Diagnostic Tests
Aortic Regurgitation II: Clinical Features and Diagnostic Tests
Imaging Studies for Cardiovascular System V: CT
Mitral Valve Prolapse II: Assessment and Management
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

