Program including abstracts as pdf available here

P 21
Title
COMPARISON OF FAT SuPPRESSION METHODS ADDING ON DIFFuSION-WEIGHTED MR
IMAGES
Authors
H. SHIMAMOTO 1 , T. TSuJIMOTO 1 , M. KATAOKA 1 , S. TOMITA 1 , I. SuMIDA 1 , N. KAKIMOTO 1 ,
S. MuRAKAMI 1 , S. FuRuKAWA 1
Affiliations
1 Osaka University Graduate School of Dentistry, Suita, JAPAN
Body
Objective
The aim of this study was to compare three different fat suppression methods adding on
diffusion-weighted images (DWI) in the oral and maxillofacial regions.
Methods
Ten patients underwent MRI with Signa HDxt 1.5T (GE Medical Systems, Milwaukee, WI) with
an eight-channel neurovascular array coil. For each patient, three diffusion-weighted imaging
using Water Excitation (WE), Chemical Shift Saturation (CHESS) or Short T1 Inversion Recovery
(STIR) as fat suppression methods were performed in addition to the routine MRI protocol
in our institution. All images were evaluated by two oral and maxillofacial radiologists. The
observers scored the images visually on the diagnostic image quality of lesions, the uniformity
of fat suppression and the degree of susceptibility artifacts using a 4-point scale. Consensus
readings for interpretation discrepancies were performed.
Results
The diagnostic image quality of lesions was lowest on DWI using STIR. The uniformity of fat
suppression was highest on DWI using STIR. The amount of susceptibility artifacts was least
on DWI using STIR.
Conclusion
In the oral and maxillofacial regions, DWI using STIR may be useful in terms of its high uniformity
of fat suppression and little amount of susceptibility artifacts.
Keywords
MRI,Diffusion Weighted images,fat suppression
136