Improved vessel-tissue contrast and image quality in 3D radial sampling-based 4D-MRI.

ABSTRACT:

Purpose

In radiation treatment planning for thoracic and abdominal tumors, 4D-MRI has shown promise in respiratory motion characterization with improved soft-tissue contrast compared to clinical standard, 4D computed tomography (4D-CT). This study aimed to further improve vessel-tissue contrast and overall image quality in 3D radial sampling-based 4D-MRI using a slab-selective (SS) excitation approach.

Methods

The technique was implemented in a 3D radial sampling with self-gating-based k-space sorting sequence. The SS excitation approach was compared to a non-selective (NS) approach in six cancer patients and two healthy volunteers at 3T. Improvements in vessel-tissue contrast ratio (CR) and vessel signal-to-noise ratio (SNR) were analyzed in five of the eight subjects. Imag

SUBMITTER: Deng Z 

PROVIDER: S-EPMC5689937 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature