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Di Giuliano F, Minosse S, Picchi E, Ferrazzoli V, Da Ros V, Muto M, Pistolese CA, Garaci F, Floris R. Qualitative and quantitative analysis of 3D T1 Silent imaging. Radiol Med 2021; 126:1207-1215. [PMID: 34131844 DOI: 10.1007/s11547-021-01380-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 05/20/2021] [Indexed: 12/14/2022]
Abstract
PURPOSE To compare brain magnetic resonance imaging (MRI) using T1 3D Silent and fast T1 3D Gradient-Echo (GRE) BRAin VOlume (known as BRAVO) sequences. The primary aim is to assess the quantitative and qualitative analysis of Silent and BRAVO images by the measurement of the contrast (C), the signal-to-noise ratio (SNR) and the contrast-to-noise ratio (CNR). The second aim is to estimate the subjective sound levels and the specific absorption rate (SAR). METHODS Twenty-two subjects had T1 3D Silent and T1 3D BRAVO sequences added to the standard MR examination. The qualitative analysis of the two sequences was performed by two radiologists independently. The quantitative analysis was performed by placing regions of interest on the cerebrospinal fluid, on the white and grey matter. The C, the CNR and the SNR were calculated for each sequence. After each T1-3D sequence, subjects gave a score rating to evaluate the acoustic noise. Finally, the SAR was evaluated by the digital imaging and communications in medicine (DICOM) tags. RESULTS The image quality scores obtained by the two radiologists were higher for BRAVO compared to the Silent. However, qualitatively, the Silent images were similar to BRAVO for diagnostic use. Quantitatively, CNR for GM-CSF was comparable in the two sequences and SNR in CSF was higher in Silent than BRAVO. The acoustic noise of Silent sequence was statistically lower compared with BRAVO. The maximum SAR measured was 1.4 W/kg. CONCLUSIONS 3D T1 Silent can be a valid alternative technique to conventional BRAVO to reduce the acoustic noise preserving the diagnostic accuracy. However, radiologists preferred the conventional sequence to Silent.
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Affiliation(s)
- Francesca Di Giuliano
- Neuroradiology Unit, Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Viale Oxford 81, 00133, Rome, Italy
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy
| | - Silvia Minosse
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy.
| | - Eliseo Picchi
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy
- Diagnostic Imaging Unit, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Viale Oxford 81, 00133, Rome, Italy
| | - Valentina Ferrazzoli
- Neuroradiology Unit, Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Viale Oxford 81, 00133, Rome, Italy
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy
| | - Valerio Da Ros
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy
| | - Massimo Muto
- Department of Neurosciences and Reproductive and Odontostomatological Sciences, University of Naples Federico II, 80100, Naples, Italy
| | - Chiara Adriana Pistolese
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy
- Diagnostic Imaging Unit, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Viale Oxford 81, 00133, Rome, Italy
| | - Francesco Garaci
- Neuroradiology Unit, Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Viale Oxford 81, 00133, Rome, Italy
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy
- San Raffaele Cassino, Cassino, Italy
| | - Roberto Floris
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Viale Oxford 81, 00133, Rome, Italy
- Diagnostic Imaging Unit, Department of Biomedicine and Prevention, University of Rome Tor Vergata, Viale Oxford 81, 00133, Rome, Italy
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Iwadate Y, Nozaki A, Nunokawa Y, Okuda S, Kabasawa H, Jinzaki M. Comparison of Silent Navigator Waveform Generation Methods. Magn Reson Med Sci 2020; 19:154-158. [PMID: 31142703 PMCID: PMC7232032 DOI: 10.2463/mrms.tn.2018-0168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 04/04/2019] [Indexed: 11/13/2022] Open
Abstract
The silent navigator technique utilizes a non-selective excitation and an appropriate respiratory waveform generation method is necessary for an accurate motion detection. We compared three methods for silent navigator waveform generation. The profile generation method with coil selection (prof-selection) resulted in a high cross correlation with bellows signals and a large respiration amplitude. The prof-selection method should be used for silent navigator waveform generation.
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Affiliation(s)
- Yuji Iwadate
- Global MR Applications and Workflow, GE Healthcare Japan, 4-7-127 Asahigaoka, Hino, Tokyo 191-8503, Japan
| | - Atsushi Nozaki
- Global MR Applications and Workflow, GE Healthcare Japan, 4-7-127 Asahigaoka, Hino, Tokyo 191-8503, Japan
| | | | - Shigeo Okuda
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - Hiroyuki Kabasawa
- Global MR Applications and Workflow, GE Healthcare Japan, 4-7-127 Asahigaoka, Hino, Tokyo 191-8503, Japan
| | - Masahiro Jinzaki
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
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