Quiet MR sequences in clinical routine: initial experience in abdominal imaging

Fischer, Sebastian; Grodzki, David; Domschke, Markus; Albrecht, Moritz H.; Bodelle, Boris; Eichler, Katrin; Hammerstingl, Renate; Vogl, Thomas J.; Zangos, Stephan

doi:10.1007/s11547-016-0710-x

Cited by 10 publications

(15 citation statements)

References 14 publications

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“…For example, Kenkel et al utilized a “lesion conspicuity” metric, scored on the 5‐point Likert scale . In another study, Fischer et al measured quality by grading artifacts, ease of abdominal organ delineation, and diagnostic confidence . Such methodologies, although routinely used, are labor‐intensive, requiring availability of trained radiologists.…”

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confidence: 99%

“…9 In another study, Fischer et al measured quality by grading artifacts, ease of abdominal organ delineation, and diagnostic confidence. 10 Such methodologies, although routinely used, are labor-intensive, requiring availability of trained radiologists. Furthermore, there is interreader variability between radiologists, 11 which can make it challenging to qualitatively assess MRI quality consistently.…”

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confidence: 99%

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Automated image quality evaluation of T₂‐weighted liver MRI utilizing deep learning architecture

Esses

Zhao

et al. 2017

Magnetic Resonance Imaging

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confidence: 99%

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confidence: 99%

Automated image quality evaluation of T₂‐weighted liver MRI utilizing deep learning architecture

Esses

Zhao

et al. 2017

Magnetic Resonance Imaging

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“…Similar subjective ratings have been shown in other studies, where ANR-imaging is perceived as quieter and more comfortable than conventional scanning. 22,25,27,36 ANR may be particularly valuable for certain patient groups. For example, among children, claustrophobic and non-cooperative patients, but also among patients with tinnitus, hyperacusis, or other sensitive hearing, loud noise can trigger fear and discomfort.…”

Section: Discussionmentioning

confidence: 99%

“…Several authors have studied gradient waveform optimization for noise reduction and its effect on image quality, 4,13,14,[22][23][24][25] yet, there is limited knowledge about gradient field exposure in this context. 18 Previous ANR research has been focused on head MRI.…”

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confidence: 99%

Maintaining Image Quality While Reducing Acoustic Noise and Switched Gradient Field Exposure During Lumbar MRI

Glans

Wilén

Lindgren

2021

Magnetic Resonance Imaging

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Background: MR-generated acoustic noise can contribute to patient discomfort and potentially be harmful. One way to reduce this noise is by altering the gradient output and/or waveform using software optimization. Such modifications might influence image quality and switched gradient field exposure, and different techniques appear to affect sound pressure levels (SPLs) to various degrees. Purpose: To evaluate SPLs, image quality, switched gradient field exposure, and participants' perceived noise levels during two different acoustic noise reduction (ANR) techniques, Quiet Suite (QS) and Whisper Mode (WM), and to compare them with conventional T2-weighted turbo spin echo (T2W TSE) of the lumbar spine. Design: Prospective. Subjects: Forty adults referred for lumbar MRI. Field Strength/Sequence: Conventional T2W TSE, T2W TSE with QS, and T2W TSE with WM were acquired at 1.5 T. Assessment: Peak SPL (A-weighted decibels, dBA), perceived noise levels (Borg CR10 ® -scale), signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), three radiologists' qualitative assessments in image quality on an ordinal scale 1-4, switched gradient field exposure (% general public), and gradient currents were measured. Interobserver reliability was reported as percentage agreement. Statistical Tests: Repeated measures ANOVA, Friedman's ANOVA, and Wilcoxon's Signed-Rank Test for acoustic noise measurements and image quality assessments. Results: Mean peak SPLs were 89.9 dBA, 74.3 dBA, and 78.8 dBA for conventional, QS, and WM, respectively (P < 0.05). Participants perceived QS as the quietest and conventional as the loudest sequence (P < 0.05). No qualitative differences in image quality were seen (P > 0.05), although QS showed significantly improved SNR and CNR (P < 0.05). Switched gradient field exposure was reduced by 66% and 48% for QS and WM, respectively. Data Conclusion: Without degrading image quality, both QS and WM are viable ANR techniques in lumbar T2W TSE. QS provided the lowest SPL, the lowest gradient field exposure and was perceived as the most silent among the three sequences. Level of Evidence: 1 Technical Efficacy Stage: 5

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“…However, it is not feasible in patients with contraindications to gadolinium-contrast MR imaging, such as patients with renal insufficiency with an estimated glomerular filtration rate<30, pregnant women, those with a history of allergic reaction to gadolinium-based contrast material, critically ill patients who cannot tolerate MR scanning, claustrophobic patients or those unable to establish venous access, which is necessary for contrast-enhanced MRV (35). Moreover, compared with duplex sonography, MR examination has a relatively higher cost with the use of contrast material and a higher acoustic noise, and the main reason for the noise is related to mechanical vibrations of gradient coil during rapid switching of gradients (36).…”

Section: Discussionmentioning

confidence: 99%

Fat‑suppressed magnetic resonance volume interpolated examination for deep venous thrombosis compared with duplex sonography

Cheng

et al. 2020

Exp Ther Med

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The aim of the present study was to evaluate magnetic resonance venography (MRV) scanned by breath-hold volume interpolated body examination with spectral fat saturation (VIBE-fs), combined with Dixon fat-suppressed VIBE (VIBE-Dixon) by using a 1.5T MR scanner for detecting deep venous thrombosis (DVT) compared with duplex sonography. A total of 31 patients with DVT were identified using duplex sonography and were enrolled in the present study for MRV examination, from the inferior vena cava to the ankle level after injection of gadopentetate dimeglumine. Venous segment-to-segment comparison was assessed for DVT detection between MRV and duplex sonography. A total of two radiologists separately performed subjective image quality assessment using a 5-point scale. Cohen's κ coefficient, Wilcoxon rank sum test and intraclass correlation coefficient values were used for statistical analysis. Of the 303 evaluated vein segments, duplex sonography identified 119 (39.3%; 119/303) venous segments with thrombus, while MRV detected 170 (56.1%; 170/303) venous segments with thrombus. The diagnostic agreement rate of DVT between duplex sonography and MRV was poor in the deep femoral vein and anterior tibial veins, while it was excellent in the inferior vena cava (IVC), common iliac vein, external iliac vein, femoral vein, popliteal vein, posterior tibial veins and peroneal veins. In addition, poor reliability was detected in the deep femoral vein, anterior tibial veins and peroneal veins, but good to excellent reliability was observed in IVC, common iliac vein, external iliac vein, femoral vein, popliteal vein and posterior tibial veins. Furthermore, image quality scores of each venous segment between the two radiologists indicated no statistical difference. Therefore, MRV scanned using VIBE-fs for the suprainguinal and VIBE-Dixon for the infrainguinal region may be a useful method for detecting DVT compared with duplex sonography. The results of present study proved this MR protocol to be a beneficial alternative imaging modality for the detection of DVT when duplex sonography is inadequate or not able to be performed.

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Quiet MR sequences in clinical routine: initial experience in abdominal imaging

Abstract: Although sequence-based noise optimizations faces problems in T1 FLASH and DIXON sequences, there is an important acoustic benefit in T2 TSE and T2 HASTE sequences, which goes along with a maintained image quality and diagnostic confidence.

Cited by 10 publications

References 14 publications

Automated image quality evaluation of T₂‐weighted liver MRI utilizing deep learning architecture

Automated image quality evaluation of T₂‐weighted liver MRI utilizing deep learning architecture

Maintaining Image Quality While Reducing Acoustic Noise and Switched Gradient Field Exposure During Lumbar MRI

Fat‑suppressed magnetic resonance volume interpolated examination for deep venous thrombosis compared with duplex sonography

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Quiet MR sequences in clinical routine: initial experience in abdominal imaging

Abstract: Although sequence-based noise optimizations faces problems in T1 FLASH and DIXON sequences, there is an important acoustic benefit in T2 TSE and T2 HASTE sequences, which goes along with a maintained image quality and diagnostic confidence.

Cited by 10 publications

References 14 publications

Automated image quality evaluation of T2‐weighted liver MRI utilizing deep learning architecture

Automated image quality evaluation of T2‐weighted liver MRI utilizing deep learning architecture

Maintaining Image Quality While Reducing Acoustic Noise and Switched Gradient Field Exposure During Lumbar MRI

Fat‑suppressed magnetic resonance volume interpolated examination for deep venous thrombosis compared with duplex sonography

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Automated image quality evaluation of T₂‐weighted liver MRI utilizing deep learning architecture

Automated image quality evaluation of T₂‐weighted liver MRI utilizing deep learning architecture