Faculty Collaboration Database

[Temperature stress for patients in routine magnetic resonance examinations]. Rofo 1998 Dec;169(6):639-44

Date

02/04/1999

Pubmed ID

9930219

DOI

10.1055/s-2007-1015355

Scopus ID

2-s2.0-0032411764 (requires institutional sign-in at Scopus site)   1 Citation

Abstract

PURPOSE: To determine energy exposure and temperature changes in routine magnetic resonance imaging practice.

MATERIALS AND METHODS: Body core and skin temperatures were compared in 155 persons (143 patients, 12 volunteers) undergoing routine magnetic resonance examinations with a 1.5 T field-strength magnetic resonance tomography unit using a fluoroptic temperature measurement system.

RESULTS: Average applied energy was 0.3 W/kg for whole body and 1.92 W/kg for spatially localized SAR. The maximum whole-body SAR was 1.43 W/kg spatially localized. Body core temperatures differed from those of the control group by a median 0.1 degree C and only a few patients (16.8%) exceeded the limit (+/- 0.5%) at which regulatory mechanisms set in. All patients remained within the normal physiological circadian temperature range (+/- 1 degree C). Skin temperature rose a median 0.49 degree C, with a maximal increase of 5.31 degrees C, which may be considered to be within the limits of physiological temperature change.

CONCLUSIONS: Clinically relevant warming of the body is unlikely in routine magnetic resonance imaging practice.

Author List

Tomczak R, Staneczek O, Wunderlich A, Wang Y, Blasche M, Rilinger N, Rieber A, Brambs HJ

Author

Yang Wang MD Professor in the Radiology department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Adolescent
Adult
Aged
Aged, 80 and over
Body Temperature Regulation
Child
Child, Preschool
Female
Humans
Infant
Magnetic Resonance Imaging
Male
Middle Aged
Reference Values
Skin Temperature