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Accelerated contrast-enhanced whole-heart coronary MRI using low-dimensional-structure self-learning and thresholding
| Content Provider | Scilit |
|---|---|
| Author | Akçakaya, Mehmet Basha, Tamer A. Chan, Raymond H. Rayatzadeh, Hussein Kissinger, Kraig V. Goddu, Beth Goepfert, Lois A. Manning, Warren J. Nezafat, Reza |
| Copyright Year | 2012 |
| Description | Journal: Magnetic Resonance in Medicine We sought to evaluate the efficacy of prospective random undersampling and low-dimensional-structure self-learning and thresholding reconstruction for highly accelerated contrast-enhanced whole-heart coronary MRI. A prospective random undersampling scheme was implemented using phase ordering to minimize artifacts due to gradient switching and was compared to a randomly undersampled acquisition with no profile ordering. This profile-ordering technique was then used to acquire contrast-enhanced whole-heart coronary MRI in 10 healthy subjects with 4-fold acceleration. Reconstructed images and the acquired zero-filled images were compared for depicted vessel length, vessel sharpness, and subjective image quality on a scale of 1 (poor) to 4 (excellent). In a pilot study, contrast-enhanced whole-heart coronary MRI was also acquired in four patients with suspected coronary artery disease with 3-fold acceleration. The undersampled images were reconstructed using low-dimensional-structure self-learning and thresholding, which showed significant improvement over the zero-filled images in both objective and subjective measures, with an overall score of 3.6 ± 0.5. Reconstructed images in patients were all diagnostic. Low-dimensional-structure self-learning and thresholding reconstruction allows contrast-enhanced whole-heart coronary MRI with acceleration as high as 4-fold using clinically available five-channel phased-array coil. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3323762/pdf |
| Ending Page | 1443 |
| Page Count | 10 |
| Starting Page | 1434 |
| e-ISSN | 15222594 |
| DOI | 10.1002/mrm.24242 |
| Journal | Magnetic Resonance in Medicine |
| Issue Number | 5 |
| Volume Number | 67 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2012-03-05 |
| Access Restriction | Open |
| Subject Keyword | Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Compressed Sensing Accelerated Imaging Image Reconstruction Whole-heart Coronary Mri Contrast-enhanced |
| Content Type | Text |
| Resource Type | Article |
