Acoustic noise reduction in MRI using Silent Scan: an initial experience
PURPOSEAcoustic noise during magnetic resonance imaging (MRI) is the main source for patient discomfort and leads to verbal communication problems, difficulties in sedation, and hearing impairment. Silent Scan technology uses less changes in gradient excitation levels, which is directly related to n...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Galenos Publishing House
2014-07-01
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| Series: | Diagnostic and Interventional Radiology |
| Online Access: |
http://www.dirjournal.org/archives/archive-detail/article-preview/acoustic-noise-reduction-in-mr-using-silent-scan-a/56215
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| _version_ | 1797691408237199360 |
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| author | Sedat Alibek Mika Vogel Wei Sun David Winkler Christopher A. Baker Michael Burke Hubertus Gloger |
| author_facet | Sedat Alibek Mika Vogel Wei Sun David Winkler Christopher A. Baker Michael Burke Hubertus Gloger |
| author_sort | Sedat Alibek |
| collection | DOAJ |
| description | PURPOSEAcoustic noise during magnetic resonance imaging (MRI) is the main source for patient discomfort and leads to verbal communication problems, difficulties in sedation, and hearing impairment. Silent Scan technology uses less changes in gradient excitation levels, which is directly related to noise levels. Here, we report our preliminary experience with this technique in neuroimaging with regard to subjective and objective noise levels and image quality.MATERIALS AND METHODSTen patients underwent routine brain MRI with 3 Tesla MR750w system and 12-channel head coil. T1-weighted gradient echo (BRAVO) and Silenz pulse sequence (TE=0, 3D radial center-out k-space filling and data sampling with relatively small gradient steps) were performed. Patients rated subjective sound impression for both sequences on a 6-point scale. Objective sound level measurements were performed with a dedicated device in gantry at different operation modes. Image quality was subjectively assessed in consensus by two radiologists on a 3-point scale.RESULTSReaders rated image quality as fully diagnostic in all patients. Measured mean noise was reduced significantly with Silenz sequence (68.8 dB vs. 104.65 dB with BRAVO, P = 0.024) corresponding to 34.3% reduction in sound intensity and 99.97% reduction in sound pressure. No significant difference was observed between Silenz sound levels and ambient sounds (i.e., background noise in the scanner room, 68.8 dB vs. 68.73 dB, P = 0.5). The patients’ subjective sound level score was lower for Silenz compared with conventional sequence (1.1 vs. 2.3, P = 0.003).CONCLUSIONT1-weighted Silent Scan is a promising technique for acoustic noise reduction and improved patient comfort. |
| first_indexed | 2024-03-12T02:12:52Z |
| format | Article |
| id | doaj.art-18320447e51146f8bdaec5ee6978f8e6 |
| institution | Directory Open Access Journal |
| issn | 1305-3825 1305-3612 |
| language | English |
| last_indexed | 2024-03-12T02:12:52Z |
| publishDate | 2014-07-01 |
| publisher | Galenos Publishing House |
| record_format | Article |
| series | Diagnostic and Interventional Radiology |
| spelling | doaj.art-18320447e51146f8bdaec5ee6978f8e62023-09-06T11:24:04ZengGalenos Publishing HouseDiagnostic and Interventional Radiology1305-38251305-36122014-07-0120436036310.5152/dir.2014.1345813049054Acoustic noise reduction in MRI using Silent Scan: an initial experienceSedat Alibek0Mika VogelWei SunDavid WinklerChristopher A. BakerMichael BurkeHubertus Gloger MVZ Radiologie & Nuklearmedizin, Fürth, Germany PURPOSEAcoustic noise during magnetic resonance imaging (MRI) is the main source for patient discomfort and leads to verbal communication problems, difficulties in sedation, and hearing impairment. Silent Scan technology uses less changes in gradient excitation levels, which is directly related to noise levels. Here, we report our preliminary experience with this technique in neuroimaging with regard to subjective and objective noise levels and image quality.MATERIALS AND METHODSTen patients underwent routine brain MRI with 3 Tesla MR750w system and 12-channel head coil. T1-weighted gradient echo (BRAVO) and Silenz pulse sequence (TE=0, 3D radial center-out k-space filling and data sampling with relatively small gradient steps) were performed. Patients rated subjective sound impression for both sequences on a 6-point scale. Objective sound level measurements were performed with a dedicated device in gantry at different operation modes. Image quality was subjectively assessed in consensus by two radiologists on a 3-point scale.RESULTSReaders rated image quality as fully diagnostic in all patients. Measured mean noise was reduced significantly with Silenz sequence (68.8 dB vs. 104.65 dB with BRAVO, P = 0.024) corresponding to 34.3% reduction in sound intensity and 99.97% reduction in sound pressure. No significant difference was observed between Silenz sound levels and ambient sounds (i.e., background noise in the scanner room, 68.8 dB vs. 68.73 dB, P = 0.5). The patients’ subjective sound level score was lower for Silenz compared with conventional sequence (1.1 vs. 2.3, P = 0.003).CONCLUSIONT1-weighted Silent Scan is a promising technique for acoustic noise reduction and improved patient comfort. http://www.dirjournal.org/archives/archive-detail/article-preview/acoustic-noise-reduction-in-mr-using-silent-scan-a/56215 |
| spellingShingle | Sedat Alibek Mika Vogel Wei Sun David Winkler Christopher A. Baker Michael Burke Hubertus Gloger Acoustic noise reduction in MRI using Silent Scan: an initial experience Diagnostic and Interventional Radiology |
| title | Acoustic noise reduction in MRI using Silent Scan: an initial experience |
| title_full | Acoustic noise reduction in MRI using Silent Scan: an initial experience |
| title_fullStr | Acoustic noise reduction in MRI using Silent Scan: an initial experience |
| title_full_unstemmed | Acoustic noise reduction in MRI using Silent Scan: an initial experience |
| title_short | Acoustic noise reduction in MRI using Silent Scan: an initial experience |
| title_sort | acoustic noise reduction in mri using silent scan an initial experience |
| url |
http://www.dirjournal.org/archives/archive-detail/article-preview/acoustic-noise-reduction-in-mr-using-silent-scan-a/56215
|
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