Pediatric radiology · 2025
Clinical evaluation of scout accelerated motion estimation and reduction (SAMER) for brain MRI in non-sedated children: initial clinical experience.
СтатьяПоддержка исследования: вне правительства СШАПоддержка NIH: внешняя программаНазвание и аннотация: Перевод пока не подготовлен
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Tabari Azadeh, Manzoor Komal, Lang Min, Polak Daniel, Splitthoff Daniel Nicolas, Clifford Bryan, Lo Wei-Ching, Cauley Stephen, Conklin John, Gee Michael S, Huang Susie Y
Аннотация
BACKGROUND: The scout accelerated motion estimation and reduction (SAMER) method has been developed to achieve rapid retrospective motion correction and may be advantageous in pediatric imaging to mitigate motion artifacts.
OBJECTIVE: To evaluate the efficacy of SAMER for motion correction of brain imaging in awake pediatric patients.
METHODS: In this institutional review board (IRB) approved and Health Insurance Portability and Accountability Act (HIPAA) compliant prospective study, 33 pediatric patients were scanned on a 3-T MRI system in the outpatient setting. The imaging protocol included an accelerated 3D T1-weighted SAMER MPRAGE research sequence acquired in 2 min 37 s. Retrospective reconstructions of the T1-weighted MPRAGE data were performed with and without SAMER motion correction. Reconstructed image pairs were reviewed side-by-side by two board-certified neuroradiologists in a blinded manner and graded for motion artifacts using a 5-point scale. The improvement in motion score was calculated by subtracting the post-correction score from the pre-correction score.
RESULTS: Without SAMER motion correction, 24 out of 33 cases (73%) showed motion artifact (21% (7/33) minimal, 27%(9/33) mild, 9% (3/33) moderate, and 15% (5/33) severe). SAMER motion correction improved motion artifacts in 79% (19/24) of cases, improving the motion score by median of 3 vs. 2 for motion-corrected examinations using SAMER. After applying SAMER motion correction, 50% (4/8) of cases considered nondiagnostic due to motion were reclassified as diagnostic.
CONCLUSION: SAMER demonstrates potential for reducing motion artifacts in 3D T1-weighted MPRAGE brain MR images, with the most notable improvements occurring in cases of moderate to severe motion.
OBJECTIVE: To evaluate the efficacy of SAMER for motion correction of brain imaging in awake pediatric patients.
METHODS: In this institutional review board (IRB) approved and Health Insurance Portability and Accountability Act (HIPAA) compliant prospective study, 33 pediatric patients were scanned on a 3-T MRI system in the outpatient setting. The imaging protocol included an accelerated 3D T1-weighted SAMER MPRAGE research sequence acquired in 2 min 37 s. Retrospective reconstructions of the T1-weighted MPRAGE data were performed with and without SAMER motion correction. Reconstructed image pairs were reviewed side-by-side by two board-certified neuroradiologists in a blinded manner and graded for motion artifacts using a 5-point scale. The improvement in motion score was calculated by subtracting the post-correction score from the pre-correction score.
RESULTS: Without SAMER motion correction, 24 out of 33 cases (73%) showed motion artifact (21% (7/33) minimal, 27%(9/33) mild, 9% (3/33) moderate, and 15% (5/33) severe). SAMER motion correction improved motion artifacts in 79% (19/24) of cases, improving the motion score by median of 3 vs. 2 for motion-corrected examinations using SAMER. After applying SAMER motion correction, 50% (4/8) of cases considered nondiagnostic due to motion were reclassified as diagnostic.
CONCLUSION: SAMER demonstrates potential for reducing motion artifacts in 3D T1-weighted MPRAGE brain MR images, with the most notable improvements occurring in cases of moderate to severe motion.