Meeting Banner
Abstract #2394

Signal Behavior of FLASE and TSE for Measuring Trabecular Bone - Theory and Experiments

Jakob Kreutner1, Peter M. Jakob1, 2, Daniel Haddad3

1Research Center Magnetic-Resonance-Bavaria, Wrzburg, Bavaria, Germany; 2Experimental Physics 5, University of Wrzburg, Wrzburg, Bavaria, Germany; 3MRB Research Center, Wrzburg, Bavaria, Germany

The usage of spin echo sequences for imaging trabecular bone is limited by the low number of echoes that can be acquired per excitation due to the long echo spacing compared to T2-relaxation. Instead of using a 90 excitation pulse and wait for full T1-relaxation, we calculated the signal for different combinations of turbo factor, repetition time and excitation angle with constant scan time and compared these to a widely-used FLASE protocol. Calculations and experiments show in good agreement, that TSE can achieve a higher signal than FLASE at the cost of a slightly broadened point spread function.

Abstract PDF Poster PDF

Keywords

according acknowledgments acquiring affairs agreement allow assuming asymmetric bandwidth behavior better bone broadening calculations choosing chosen corresponds cost decay decreases decreasing denotes dependency derived determining done drawback echoes economic effective efficiency equation equations even excitation expected experiment experimental fact fast fatty filtering formula formulation full function funded gains good gradient grants graph half handbook health highly idea implemented important improvements includes infrastructure larger last lengthening like limited long longer lowest marrow matching materials measured measuring ministry needed noise normalized noticeably outer part peanut peter phantom physics project protocol prove pulse quality quantification readout received receiver recent recommended reconstruction refocusing reliable repetition requires resolution short shorten since space speed spin spread starting starts studies technology term thanks theory trains transport turbo unit units usually volume widely width written