Flow-induced disturbances in balanced steady-state free precession images: means to reduce or exploit them.

• In this work computer simulations and phantom measurements are presented that show the effect of flow on in-plane balanced steady-state free precession images. The images were studied for various flow velocities, excitation regions, relaxation times, RF-pulse angles, and off-resonance frequencies. The work shows that flow-induced disturbances are present in the images, but can be reduced by the application of inhomogeneous excitation regions. Also, a velocity quantification method that utilizes the disturbances was developed and proved to quantify flow velocities accurately. The work concluded that the flow-induced disturbances can be reduced to improve image quality, but can also be exploited to quantify the flow velocity.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)

Keyword

Algorithms

Animals

Arteries

physiology

Artifacts

Blood Flow Velocity

physiology

Computer Simulation

Humans

Image Interpretation

Computer-Assisted

methods

Magnetic Resonance Imaging

methods

Models

Cardiovascular

Rheology

methods

Publication and Content Type

ref (subject category)

art (subject category)