Quiet T1-Weighted Pointwise Encoding Time Reduction with Radial Acquisition for Assessing Myelination in the Pediatric Brain

Aida, Noriko; Niwa, Tesu; Fujii, Yuta; Nozawa, Kumiko; Enokizono, Mikako; Murata, Katsutoshi; Obata, Takayuki

doi:10.3174/ajnr.a4747

Cited by 23 publications

(18 citation statements)

References 21 publications

(24 reference statements)

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“…Recently, Aida et al 13 reported quiet T 1 W sequence for pediatric myelination evaluation. Their quiet T 1 W sequence was 4.8 dB higher than that of ambient sound and the interrater agreement for myelination degree between quiet sequence and conventional T 1 W images were excellent.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Silent and Conventional MR Imaging for the Evaluation of Myelination in Children

et al. 2017

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Purpose:Silent magnetic resonance imaging (MRI) scans produce reduced acoustic noise and are considered more gentle for sedated children. The aim of this study was to compare the validity of T1- (T1W) and T2-weighted (T2W) silent sequences for myelination assessment in children with conventional spin-echo sequences.Materials and Methods:A total of 30 children (21 boys, 9 girls; age range: 1–83 months, mean age: 35.5 months, median age: 28.5 months) were examined using both silent and spin-echo sequences. Acoustic noise levels were analyzed and compared. The degree of myelination was qualitatively assessed via consensus, and T1W and T2W signal intensities were quantitatively measured by percent contrast.Results:Acoustic noise levels were significantly lower during silent sequences than during conventional sequences (P < 0.0001 for both T1W and T2W). Inter-method comparison indicated overall good to excellent agreement (T1W and T2W images, κ = 0.76 and 0.80, respectively); however, agreement was poor for cerebellar myelination on T1W images (κ = 0.14). The percent contrast of silent and conventional MRI sequences had a strong correlation (T1W, correlation coefficient [CC] = 0.76; T1W excluding the middle cerebellar peduncle, CC = 0.82; T2W, CC = 0.91).Conclusions:For brain MRI, silent sequences significantly reduced acoustic noise and provided diagnostic image quality for myelination evaluations; however, the two methods differed with respect to cerebellar delineation on T1W sequences.

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Section: Discussionmentioning

confidence: 99%

Comparison of Silent and Conventional MR Imaging for the Evaluation of Myelination in Children

et al. 2017

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“…PETRA keeps the gradient constant for almost the entire repetition and it only slightly changes at the end of each repetition . Accordingly, acoustic noise is only slightly higher compared to the baseline level . Although this effect was not assessed in this study, we believe that the silent scan might have caused less stress for the infants during scanning.…”

Section: Discussionmentioning

confidence: 80%

Visualization of the airway in infants with MRI using pointwise encoding time reduction with radial acquisition (PETRA)

Niwa

Nozawa

Aida

2016

Magnetic Resonance Imaging

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“…The recently introduced silent MRI technique can dramatically reduce acoustic noise by employing fewer changes in gradient excitation levels. Several reports suggest that silent MRI sequences significantly reduced acoustic noise and provided diagnostic image quality for myelination evaluations in the pediatric brain …”

Section: Techniques To Minimize Sedation For Pediatric Mri Examinationsmentioning

confidence: 99%

“…Several reports suggest that silent MRI sequences significantly reduced acoustic noise and provided diagnostic image quality for myelination evaluations in the pediatric brain. 30,31 Fast Sequences Fast MRI sequences are routinely used on all fetal MRI protocols to overcome various fetal and maternal motion artifacts. These sequences can "freeze" motion and allow for a rapid anatomical survey within 1 minute.…”

Section: Noise Reductionmentioning

confidence: 99%

Techniques for minimizing sedation in pediatric MRI

Dong

Zhu

Bulas

2019

Magnetic Resonance Imaging

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MRI is used widely in infants and young children. However, in these young cases deep sedation or general anesthesia is often required to minimize motion artifacts during MRI examinations. Although the benefits of MR typically outweigh the potential risks of sedation when delivered by an experienced team, there are increasing concerns regarding the affect of sedation on young children. There continues to be a push to develop various strategies that can minimize the need for sedation. The present review summarizes several technical and clinical approaches that can help decrease the need for sedation in the pediatric patient. Optimization of the MRI environment, the role of child life specialists, feed‐and‐bundle and distraction techniques, noise‐reduction methods, artificial intelligence, and MRI advances to decrease both scan times and motion artifacts will be discussed. Level of Evidence: 5 Technical Efficacy Stage: 1 J. Magn. Reson. Imaging 2019.

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Quiet T1-Weighted Pointwise Encoding Time Reduction with Radial Acquisition for Assessing Myelination in the Pediatric Brain

Abstract: BACKGROUND AND PURPOSE: T1-weighted pointwise encoding time reduction with radial acquisition (PETRA) sequences require limited gradient activity and allow quiet scanning. We aimed to assess the usefulness of PETRA in pediatric brain imaging.

Cited by 23 publications

References 21 publications

Comparison of Silent and Conventional MR Imaging for the Evaluation of Myelination in Children

Comparison of Silent and Conventional MR Imaging for the Evaluation of Myelination in Children

Visualization of the airway in infants with MRI using pointwise encoding time reduction with radial acquisition (PETRA)

Techniques for minimizing sedation in pediatric MRI

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