SAR Calculations in MRI Scanning Systems [Health Effects]

Author

Wang, Zhangwei ; Lin, James C.

Author_Institution

GE Healthcare, Aurora, OH, USA

Volume

13

Issue

5

fYear

2012

Firstpage

22

Lastpage

29

Abstract

The benefits of magnetic resonance imaging (MRI) have made it the radiological method of choice for a great number of diagnostic procedures. Aside from some acute potential risks such as those from aneurysm clips or certain metal objects in the patient´s body or scanner environment, no adverse health effects have been associated with clinical MRI. To form images, radio frequency (RF) magnetic fields are used to excite and detect MR signals from body tissues. For the common 1.5 tesla (T) and increasingly 3.0 T clinical MRI scanners, the associated RF frequencies for proton imaging at 1.5 and 3.0 T are about 64 and 128 MHz, respectively.

Keywords

biological tissues; biomedical MRI; cellular biophysics; radiology; MR signals; MRI scanning systems; RF frequencies; SAR calculations; adverse health effects; aneurysm clips; body tissues; certain metal objects; magnetic resonance imaging; proton imaging; radiofrequency magnetic fields; radiological method; Biomedical image processing; Magnetic resonance imaging; Medical image processing; Radiology; Specific absorption rate;

fLanguage

English

Journal_Title

Microwave Magazine, IEEE

Publisher

ieee

ISSN

1527-3342

Type

jour

DOI

10.1109/MMM.2012.2197140

Filename

6238537