✦ LIBER ✦

Acoustic noise reduction in a 4 T MRI scanner

✍ Scribed by Mechefske, C

Book ID: 104390813
Publisher: Springer
Year: 2002
Tongue: English
Weight: 254 KB
Volume: 13
Category: Article
ISSN: 0968-5243
DOI: 10.1016/s1352-8661(01)00146-6

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✦ Synopsis

High-field, high-speed magnetic resonance imaging (MRI) can generate high levels of noise. There is ongoing concern in the medical and imaging research communities regarding the detrimental effects of high acoustic levels on auditory function, patient anxiety, verbal communication between patients and health care workers and ultimately MR image quality. In order to effectively suppress the noise levels inside MRI scanners, the sound field needs to be accurately measured and characterized. This paper presents the results of measurements of the sound radiation from a gradient coil cylinder within a 4 T MRI scanner under a variety of conditions. These measurement results show: (1) that noise levels can be significantly reduced through the use of an appropriately designed passive acoustic liner; and (2) the true noise levels that are experienced by patients during echo planar imaging.

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