Nonrigid active shape model-based registration framework for motion correction of cardiac T₁ mapping.

ABSTRACT:

Purpose

Accurate reconstruction of myocardial T₁ maps from a series of T₁ -weighted images consists of cardiac motions induced from breathing and diaphragmatic drifts. We propose and evaluate a new framework based on active shape models to correct for motion in myocardial T₁ maps.

Methods

Multiple appearance models were built at different inversion time intervals to model the blood-myocardium contrast and brightness changes during the longitudinal relaxation. Myocardial inner and outer borders were automatically segmented using the built models, and the extracted contours were used to register the T₁ -weighted images. Data acquired from 210 patients using a free-breathing acquisition protocol were used to train and evaluate the pro

SUBMITTER: El-Rewaidy H 

PROVIDER: S-EPMC5941305 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature