| Zugriffsnummer | 39451 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Evaluation of a thermal dose based safety concept for 7T pTx coils |
| Autor(in); Institution |
Seifert, Frank; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
Ittermann, Bernd; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
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| Quelle/Jahr | ISMRM 25th annual meeting & exhibition: 22 - 27 April 2017, Honolulu : IN: Proceedings of the Society of Magnetic Resonance in Medicine: 25 (2017), 2624-1 - 2624-3 |
| Availability | [online only] |
| Verlag | Berkeley, Calif.: ISMRM |
| Konferenzangaben | ISMRM 25th Annual Meeting & Exhibition, Honolulu, Hawaii, 22 April – 27 April , 2017, Honolulu |
| Zusammenfassung | A simple procedure is proposed to calculate thermal dose values (CEM43) from upper-limit values of tissue temperatures utilizing a T-matrix formalism. In case of equal maximum forward power for each RF channel this calculation scheme is independent of actual RF phase settings providing a robust safety measure. The procedure is evaluated for an extended neuroscience MR session and a pTx scenario when heating of eye tissue is worst, i.e. the steady-state eye temperature is just below the corresponding upper limit value. The proposed approach, as a generalization of the thermal dose concept, is capable to determine reliably the risk of excessive tissue heating when using pTx coils. |
