The margin of internal risk volume on atrial septal and ventricular septal based on electrocardiograph gating 4DCT.

ABSTRACT:

Background

The aim of this study was to quantify the margin of internal risk volume (IRV) on the atrial septum (AS) and ventricular septum (VS) based on electrocardiograph gating (ECG-gating) 4DCT.

Methods

Twenty patients were enrolled and received an ECG-gating 4DCT scan performed in breath-hold, and CT images were reconstructed at 5% intervals of the cardiac cycle for a total of 20 phases (0-95%). The contouring of the AS and VS were delineated in each phase, and the displacements and margin of the AS and VS were calculated. We fused the total of the AS and VS (0-95% phase), which were recorded as AS₂₀ and VS₂₀. The margins were applied to the AS and VS in every phase and revised according to the cover rate of AS₂₀ and VS₂₀.

R

SUBMITTER: Li Q 

PROVIDER: S-EPMC8184443 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature