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Image quality at synthetic brain magnetic resonance imaging in children
So Mi Lee1, Young Hun Choi2, Jung-Eun Cheon3
1Department of Radiology, Kyungpook National University Hospital, Daegu, South Korea.
Insights
Synthetic T1- and T2-weighted MRI scans offer diagnostically acceptable image quality in children, comparable to conventional methods. However, synthetic FLAIR images showed reduced quality, impacting diagnostic utility in pediatric brain imaging.
Area of Science:
- Radiology
- Medical Imaging
- Pediatric Imaging
Background:
- Multi-echo, multi-delay synthetic magnetic resonance imaging (MRI) generates multiple sequences in one acquisition.
- Clinical use of synthetic MRI has primarily been in adult populations.
Purpose of the Study:
- To assess and compare the image quality of synthetic brain MRI in pediatric patients against conventional MRI techniques.
- Evaluate diagnostic acceptability of synthetic MRI sequences in children.
Main Methods:
- Twenty-nine children (0-16 years) underwent both synthetic and conventional brain MRI scans.
- Synthetic T1-weighted, T2-weighted, and fluid-attenuated inversion recovery (FLAIR) images were generated to match conventional settings.
- Image quality, gray/white matter differentiation, lesion conspicuity, and image degradations were rated on a 5-point scale; relative contrasts and acquisition times were compared.
Main Results:
- Synthetic T1- and T2-weighted images demonstrated diagnostically acceptable quality, with comparable or better gray/white matter differentiation than conventional scans.
- Synthetic FLAIR images exhibited significantly reduced quality and poorer gray/white matter differentiation.
- No significant differences in lesion conspicuity were observed across synthetic and conventional sequences.
- Synthetic imaging resulted in approximately two-thirds the acquisition time of conventional MRI.
Conclusions:
- Synthetic T1- and T2-weighted MRI are diagnostically acceptable for pediatric brain imaging, offering comparable lesion conspicuity and gray/white matter differentiation to conventional MRI.
- Synthetic FLAIR images are not diagnostically acceptable in children due to image quality limitations.
- Synthetic MRI offers reduced acquisition times, a significant advantage in pediatric imaging.
Background:
The clinical application of the multi-echo, multi-delay technique of synthetic magnetic resonance imaging (MRI) generates multiple sequences in a single acquisition but has mainly been used in adults.
Objective:
To evaluate the image quality of synthetic brain MR in children compared with that of conventional images.
Materials And Methods:
Twenty-nine children (median age: 6 years, range: 0-16 years) underwent synthetic and conventional imaging. Synthetic (T2-weighted, T1-weighted and fluid-attenuated inversion recovery [FLAIR]) images with settings matching those of the conventional images were generated. The overall image quality, gray/white matter differentiation, lesion conspicuity and image degradations were rated on a 5-point scale. The relative contrasts were assessed quantitatively and acquisition times for the two imaging techniques were compared.
Results:
Synthetic images were inferior due to more pronounced image degradations; however, there were no significant differences for T1- and T2-weighted images in children <2 years old. The quality of T1- and T2-weighted images were within the diagnostically acceptable range. FLAIR images showed greatly reduced quality. Gray/white matter differentiation was comparable or better in synthetic T1- and T2-weighted images, but poorer in FLAIR images. There was no effect on lesion conspicuity. Synthetic images had equal or greater relative contrast. Acquisition time was approximately two-thirds of that for conventional sequences.
Conclusion:
Synthetic T1- and T2-weighted images were diagnostically acceptable, but synthetic FLAIR images were not. Lesion conspicuity and gray/white matter differentiation were comparable to conventional MRI.
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