Patient position detection, for SAR optimization in magnetic resonance imaging

Andreas Keil, Christian Wachinger, Gerhard Brinker, Stefan Thesen, Nassir Navab

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

4 Zitate (Scopus)

Abstract

Although magnetic resonance imaging is considered to be non-invasive, there is at least one effect on the patient which has to be monitored: The heating which is generated by absorbed radio frequency (RF) power. It is described using the specific absorption rate (SAR). In order to obey legal limits for these SAR values, the scanner's duty cycle has to be adjusted. The limiting factor depends on the patient's position with respect to the scanner. Detection of this position allows a better adjustment of the RF power resulting in an improved scan performance and image quality. In this paper, we propose real-time methods for accurately detecting the patient's position with respect to the scanner. MR data of thirteen test persons acquired using a new "move during scan" protocol which provides low resolution MR data during the initial movement of the patient bed into the scanner, is used to validate the detection algorithm. When being integrated, our results would enable automatic SAR optimization within the usual acquisition workflow at no extra cost.

OriginalspracheEnglisch
TitelMedical Image Computing and Computer-Assisted Intervention, MICCAI 2006 - 9th International Conference, Proceedings
Herausgeber (Verlag)Springer Verlag
Seiten49-57
Seitenumfang9
ISBN (Print)354044727X, 9783540447276
DOIs
PublikationsstatusVeröffentlicht - 2006
Veranstaltung9th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2006 - Copenhagen, Dänemark
Dauer: 1 Okt. 20066 Okt. 2006

Publikationsreihe

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Band4191 LNCS - II
ISSN (Print)0302-9743
ISSN (elektronisch)1611-3349

Konferenz

Konferenz9th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2006
Land/GebietDänemark
OrtCopenhagen
Zeitraum1/10/066/10/06

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