title: [Assessment of the morphological and dynamic features of normal pulmonary valve in a cardiac cycle using dual-source CT].
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.
authors.affiliation: Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China.
authors.forename: Liqing
authors.initials: L
authors.lastname: Peng
authors.forename: Jianqun
authors.initials: J
authors.lastname: Yu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Yang
authors.forename: Xueming
authors.initials: X
authors.lastname: Li
authors.forename: Dongdong
authors.initials: D
authors.lastname: Chen
authors.forename: Yi
authors.initials: Y
authors.lastname: Luo
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007472:Iohexol / Q000031:analogs & derivatives; D008297:Male; D008875:Middle Aged; D011664:Pulmonary Valve / Q000033:anatomy & histology* / Q000000981:diagnostic imaging* / Q000502:physiology; D036542:Tomography, Spiral Computed / Q000379:methods*
chemical_list: D007472:Iohexol; C038192:iopromide