[Imaging properties of SAR-reduced sequences in 3T-MR system].
Reduction of the specific absorption ratio (SAR) is essential in MR systems with high magnetic fields. Therefore, a variety of SAR-reduced sequences are available on modern 3T-MR systems, and some sequences can be applied under the same conditions as conventional sequences. The purpose of this study was to compare the imaging properties of a phantom acquired by SAR-reduced sequences with those of conventional sequences. Our data showed that effective relaxation time differed in each of the sequences, because the echo space and RF pulse of the SAR-reduced sequences varied from those of the conventional sequences. Further, the image contrast of the SAR-reduced sequences differed from the image contrast of the conventional ones.
Uchida
Koji
K
Department of Radiology, Shimane University Faculty of Medicine, and Shimane University Hospital.
Ozaki
Shiro
S
Hara
Shinji
S
Matsumura
Akihiko
A
Komatsu
Akio
A
Kitagaki
Hajime
H
D017352:Echo-Planar Imaging; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D019047:Phantoms, Imaging