Feasibility of T-2-Weighted Turbo Spin Echo Imaging of the Human Prostate at 7 Tesla

作者：Maas Marnix C^*; Vos Eline K; Lagemaat Miriam W; Bitz Andreas K; Orzada Stephan; Kobus Thiele; Kraff Oliver; Maderwald Stefan; Ladd Mark E; Scheenen Tom W J

来源：Magnetic Resonance in Medicine, 2014, 71(5): 1711-1719.

DOI：10.1002/mrm.24818

• prostate
• T-2-weighted imaging
• ultra-high field
• 7 Tesla

PurposeTo demonstrate that high quality T-2-weighted (T2w) turbo spin-echo (TSE) imaging of the complete prostate can be achieved routinely and within safety limits at 7 T, using an external transceive body array coil only. %26lt;br%26gt;MethodsNine healthy volunteers and 12 prostate cancer patients were scanned on a 7 T whole-body system. Preparation consisted of B-0 and radiofrequency shimming and localized flip angle calibration. T-1 and T-2 relaxation times were measured and used to define the T2w-TSE protocol. T2w imaging was performed using a TSE sequence (pulse repetition time/echo time 3000-3640/71 ms) with prolonged excitation and refocusing pulses to reduce specific absorption rate. %26lt;br%26gt;ResultsHigh quality T2w TSE imaging was performed in less than 2 min in all subjects. Tumors of patients with gold-standard tumor localization (MR-guided biopsy or prostatectomy) were well visualized on 7 T imaging (n=3). The number of consecutive slices achievable within a 10-g averaged specific absorption rate limit of 10 W/kg was 28 in all subjects, sufficient for full prostate coverage with 3-mm slices in at least one direction. %26lt;br%26gt;ConclusionHigh quality T2w TSE prostate imaging can be performed routinely and within specific absorption rate limits at 7 T with an external transceive body array. Magn Reson Med 71:1711-1719, 2014.

• 出版日期2014-5