Title :
Artifact assessment of RARE sequence in brain with motion reduction techniques
Author :
Hedjazi, M. ; Rahbar, N. ; Sharafi, A.A. ; Khodadoost, A.A.
Author_Institution :
Dept. of Med. Phys., Tehran Univ., Iran
Abstract :
Rapid acquisition relaxation-enhanced (RARE) sequences provide images with highly T2-weighted contrast in substantially reduced imaging times. The authors compared artifacts conspicuity on RARE and spin echo T2-weighted imaging of the brain in 24 patients from 12 to 65 years in age on a 0.28-T MR unit. The ghost and motion artifacts were quantitively evaluated. Three reviewers then independently analyzed the images for (a) susceptibility effect, (b) truncation artifact. In this study motion artifacts were reduced with the RARE compared with SE sequence (p<0.05). Furthermore, RARE with gradient-reorientation techniques appears to be a powerful solution to all types of motion artifacts in the brain. RARE images were rated the same as SE images in 100% (69 of 69) of the case reviews for truncation artifact and 56% (38 of 69) for susceptibility effect
Keywords :
biomedical NMR; brain; magnetic susceptibility; medical image processing; motion estimation; spin-spin relaxation; 0.28 T; 12 to 65 y; RARE sequence; T2-weighted contrast; artifact assessment; brain MRI; ghost artifacts; imaging time reduction; magnetic resonance imaging; medical diagnostic imaging; motion artifacts; motion reduction techniques; susceptibility effect; truncation artifact; Biomedical imaging; Hospitals; Image analysis; Performance evaluation; Phase noise; Physics; Radiology; Signal to noise ratio; Silicon compounds; Tellurium;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995 and 14th Conference of the Biomedical Engineering Society of India. An International Meeting, Proceedings of the First Regional Conference., IEEE
Conference_Location :
New Delhi
Print_ISBN :
0-7803-2711-X
DOI :
10.1109/RCEMBS.1995.511707
