High signal-to-noise FLASH imaging at 8 Tesla. |
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| Authors: | R E Burgess Y Yu A M Abduljalil A Kangarlu P M Robitaille |
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| Institution: | Department of Radiology, The Ohio State University, Columbus 43210, USA. |
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| Abstract: | A radio frequency (RF) and gradient spoiled fast low angle shot technique was used to acquire images from the human brain at 8 Tesla. The resulting FLASH images, obtained with a 17 degrees nutation, a 70 ms repetition time, and a 17 ms echo time, displayed an average signal-to-noise ratio (SNR) of 220:1 (slice thickness 2.2 mm, field-of-view 24 cm, matrix 256 x 128). These images were compared with images obtained at 1.5 Tesla using identical parameters yielding a signal-to-noise of less than 10:1. As such, the 8 Tesla images display a remarkable improvement in SNR with increasing field strength. The images also show little evidence of susceptibility distortion, chemical shift, or RF penetration limitations. |
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