Single point imaging with suppressed sound pressure levels through gradient-shape adjustment.
Acoustic noise produced during single point imaging (SPI) experiments was modulated by changes in the spatial encoding gradients. Parameters of both linear and sine-shaped gradient ramps were modified to minimize the acoustic noise levels. Acoustic noise measurements during SPI were measured on three different gradient systems and revealed that for small gradient-bore systems a considerable acoustic noise reduction of more than 20 dB can easily be achieved. SPI in conjunction with an optimized gradient waveform can be a superb alternative to the previously introduced single point ramped imaging with T(1) enhancement (SPRITE) method when sound levels and overheating of gradients are a concern.
Latta
Peter
P
Institute for Biodiagnostics, National Research Council of Canada, 435 Ellice Avenue, Winnipeg, Manitoba, Canada R3B 1Y6. peter.latta@nrc-cnrc.gc.ca
Gruwel
Marco L H
ML
Edie
Earle
E
Srámek
Milos
M
Tomanek
Boguslaw
B
D000162:Acoustics; D016477:Artifacts; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009622:Noise; D019047:Phantoms, Imaging