Cited by 56Advanced Image Processing TechniquesAdvanced MRI Techniques and ApplicationsMedical Image Segmentation Techniques

7T-guided super-resolution of 3T MRI

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Bahrami, Khosro, Shi, Feng, Rekik, Islem, Gao, Yaozong, Shen, Dinggang·2017·Medical Physics

Abstract

PURPOSE: High-resolution MR images can depict rich details of brain anatomical structures and show subtle changes in longitudinal data. 7T MRI scanners can acquire MR images with higher resolution and better tissue contrast than the routine 3T MRI scanners. However, 7T MRI scanners are currently more expensive and less available in clinical and research centers. To this end, we propose a method to generate super-resolution 3T MRI that resembles 7T MRI, which is called as 7T-like MR image in this paper. METHODS: First, we propose a mapping from 3T MRI to 7T MRI space, using regression random forest. The mapped 3T MR images serve as intermediate results with similar appearance as 7T MR images. Second, we predict the final higher resolution 7T-like MR images based on sparse representation, using paired local dictionaries for both the mapped 3T MR images and 7T MR images. RESULTS: Based on 15 subjects with both 3T and 7T MR images, the predicted 7T-like MR images by our method can best match the ground-truth 7T MR images, compared to other methods. Meanwhile, the experiment on brain tissue segmentation shows that our 7T-like MR images lead to the highest accuracy in the segmentation of WM, GM, and CSF brain tissues, compared to segmentations of 3T MR images as well as the reconstructed 7T-like MR images by other methods. CONCLUSIONS: We propose a novel method for prediction of high-resolution 7T-like MR images from low-resolution 3T MR images. Our predicted 7T-like MR images demonstrate better spatial resolution compared to 3T MR images, as well as prediction results by other comparison methods. Such high-quality 7T-like MR images could better facilitate disease diagnosis and intervention.

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  • Super-resolution for MRI can be used to improve the trade-off between resolution, SNR, and acquisition time, generate 7T-like MR images on 3T MRI scanners, or obtain super-resolution T1 maps from a set of low resolution T1 weighted images.

    “Super-resolution for MRI have been around for almost 10 years [192, 193] and can be used to improve the trade-off between resolution, SNR, and acquisition time [194], generate 7T-like MR images on 3T MRI scanners [195], or obtain super-resolution T 1 maps from a set of low resolution T 1 weighted images [196].”
  • Super-resolution for MRI can be used to improve the trade-off between resolution, SNR, and acquisition time, generate 7T-like MR images on 3T MRI scanners, or obtain super-resolution T1 maps from a set of low resolution T1 weighted images.

    “Super-resolution for MRI have been around for almost 10 years [192, 193] and can be used to improve the trade-off between resolution, SNR, and acquisition time [194], generate 7T-like MR images on 3T MRI scanners [195], or obtain super-resolution T 1 maps from a set of low resolution T 1 weighted images [196].”

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  1. [9]Rabinson MD Chiu SJ Toth JA Izatt JA Lo JY Farsiu S New Applications of Super-Resolution in Medical Imaging, Book Chapter in Super-Resolution Imaging Farnham Taylor and Francis Group 2010 383 412

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Authors
Bahrami, K., Shi, F., Rekik, I., Gao, Y., & Shen, D.
Affiliations
University of North Carolina at Chapel Hill (US)
Corresponding author
Shen, Dinggang
Venue
Medical Physics
Publisher
Wiley
Published
2017-04-22
Volume
44
Issue
5
Pages
1661-1677
ISSN
  • 0094-2405 (ISSN-L)
  • 2473-4209
OpenAlex
W2587341032
Cited by
56
References
56
Citations by year
2026: 3 · 2025: 6 · 2024: 4 · 2023: 4 · 2022: 10 · 2021: 10 · 2020: 8 · 2019: 6 · 2018: 5
FWCI
2.13
Type
journal article
Language
en
Open access
Locations
  • Medical Physics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
National Institute of Biomedical Imaging and Bioengineering (R01EB008374)
Topics
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Image Processing Techniques
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Medical Image Segmentation Techniques
Keywords
7T MRI, MRI super-resolution, 3T MRI, sparse representation, brain tissue segmentation, white matter, gray matter, cerebrospinal fluid, high-resolution MRI
MeSH terms
Brain, Humans, Magnetic Resonance Imaging, Sensitivity and Specificity

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