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| Home > Publications database > Fast and accurate multi-channel B1+ mapping based on the TIAMO technique for 7T UHF body MRI. > print |
| 001 | 132460 | ||
| 005 | 20240229105017.0 | ||
| 024 | 7 | _ | |a 10.1002/mrm.26925 |2 doi |
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| 024 | 7 | _ | |a 0740-3194 |2 ISSN |
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| 037 | _ | _ | |a DKFZ-2018-00148 |
| 041 | _ | _ | |a eng |
| 082 | _ | _ | |a 610 |
| 100 | 1 | _ | |a Brunheim, Sascha |b 0 |
| 245 | _ | _ | |a Fast and accurate multi-channel B1+ mapping based on the TIAMO technique for 7T UHF body MRI. |
| 260 | _ | _ | |a New York, NY [u.a.] |c 2018 |b Wiley-Liss |
| 336 | 7 | _ | |a article |2 DRIVER |
| 336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1521452489_14565 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
| 336 | 7 | _ | |a JOURNAL_ARTICLE |2 ORCID |
| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a Current methods for mitigation of transmit field B1+ inhomogeneities at ultrahigh field (UHF) MRI by multi-channel radiofrequency (RF) shimming rely on accurate B1+ mapping. This can be time consuming when many RF channels have to be mapped for in vivo body MRI, where the B1maps should ideally be acquired within a single breath-hold. Therefore, a new B1+ mapping technique (B1TIAMO) is proposed.The performance of this technique is validated against an established method (DREAM) in phantom measurements for a cylindrical head phantom with an 8-channel transmit/receive (Tx/Rx) array. Furthermore, measurements for a 32-channel Tx/Rx remote array are conducted in a large body phantom and the |B1+| map reliability is validated against simulations of the transmit RF field distribution. Finally, in vivo results of this new mapping technique for human abdomen are presented.For the head phantom (8-channel Tx/Rx coil), the single |B1+| comparison between B1TIAMO, the direct DREAM measurements, and simulation data showed good agreement with 10-19% difference. For the large body phantom (32-channel Tx/Rx coil), B1TIAMO matched the RF field simulations well.The results demonstrate the potential to acquire 32 accurate single-channel B1+ maps for large field-of-view body imaging within only a single breath-hold of 16 s at 7T UHF MRI. Magn Reson Med 79:2652-2664, 2018. © 2017 International Society for Magnetic Resonance in Medicine. |
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| 700 | 1 | _ | |a Gratz, Marcel |b 1 |
| 700 | 1 | _ | |a Johst, Sören |b 2 |
| 700 | 1 | _ | |a Bitz, Andreas |0 P:(DE-He78)4444ba69faa9240d7ec86ed09e6ca04e |b 3 |u dkfz |
| 700 | 1 | _ | |a Fiedler, Thomas |0 P:(DE-He78)bcbe9862276365dd99a98b48449fd046 |b 4 |u dkfz |
| 700 | 1 | _ | |a Ladd, Mark |0 P:(DE-He78)022611a2317e4de40fd912e0a72293a8 |b 5 |u dkfz |
| 700 | 1 | _ | |a Quick, Harald H |b 6 |
| 700 | 1 | _ | |a Orzada, Stephan |b 7 |
| 773 | _ | _ | |a 10.1002/mrm.26925 |g Vol. 79, no. 5, p. 2652 - 2664 |0 PERI:(DE-600)1493786-4 |n 5 |p 2652 - 2664 |t Magnetic resonance in medicine |v 79 |y 2018 |x 0740-3194 |
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