Motion estimation for cardiac functional analysis using two x-ray computed tomography scans.

ABSTRACT:

Purpose

This work concerns computed tomography (CT)-based cardiac functional analysis (CFA) with a reduced radiation dose. As CT-CFA requires images over the entire heartbeat, the scans are often performed at 10-20% of the tube current settings that are typically used for coronary CT angiography. A large image noise then degrades the accuracy of motion estimation. Moreover, even if the scan was performed during the sinus rhythm, the cardiac motion observed in CT images may not be cyclic with patients with atrial fibrillation. In this study, we propose to use two CT scan data, one for CT angiography at a quiescent phase at a standard dose and the other for CFA over the entire heart beat at a lower dose.

Methods

We have made the following four modifications to an image-based c

SUBMITTER: Fung GSK 

PROVIDER: S-EPMC5603222 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature