Multiecho pseudo-golden angle stack of stars thermometry with high spatial and temporal resolution using k-space weighted image contrast.

ABSTRACT:

Purpose

Implement and evaluate a 3D MRI method to measure temperature changes with high spatial and temporal resolution and large field of view.

Methods

A multiecho pseudo-golden angle stack-of-stars (SOS) sequence with k-space weighted image contrast (KWIC) reconstruction was implemented to simultaneously measure multiple quantities, including temperature, initial signal magnitude M(0), transverse relaxation time ( T2*), and water/fat images. Respiration artifacts were corrected using self-navigation. KWIC artifacts were removed using a multi-baseline library. The phases of the multiple echo images were combined to improve proton resonance frequency precision. Temperature precision was tested through in vivo breast imaging (N = 5 healthy volunteers) using both coronal and s

SUBMITTER: Svedin BT 

PROVIDER: S-EPMC6711157 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature