Phase contrast MRI with minimized background phase errors.

ABSTRACT:

Purpose

Phase contrast MRI (PC-MRI) is used clinically to measure velocities in the body, but systematic background phase errors caused by magnetic field imperfections corrupt the velocity measurements with offsets that limit clinical utility. This work aims to minimize systematic background phase errors in PC-MRI, thereby maximizing the accuracy of velocity measurements.

Methods

The MRI scanner's background phase errors from eddy currents and mechanical oscillations were modeled using the gradient impulse response function (GIRF). Gradient waveforms were then numerically optimized using the GIRF to create pulse sequences that minimize the background phase errors. The pulse sequences were tested in a static phantom where the predicted response could be compared directly to t

SUBMITTER: Loecher M 

PROVIDER: S-EPMC11870205 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature