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Feasibility of T 2 ‐weighted turbo spin echo imaging of the human prostate at 7 tesla
Author(s) -
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.
Publication year - 2014
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.24818
Subject(s) - flip angle , specific absorption rate , fast spin echo , prostate , nuclear medicine , echo time , radiofrequency coil , prostate cancer , image quality , prostatectomy , magnetic resonance imaging , medicine , nuclear magnetic resonance , radiology , physics , cancer , computer science , image (mathematics) , telecommunications , artificial intelligence , antenna (radio)
Purpose To 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. Methods Nine 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. Results High 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. Conclusion High 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. © 2013 Wiley Periodicals, Inc .