Near‐isotropic noncontrast MRA of the renal and peripheral arteries using a thin‐slab stack‐of‐stars quiescent interval slice‐selective acquisition
| Autor: | Ioannis Koktzoglou, Nondas Leloudas, Emily A. Aherne, Jianing Pang, Robert R. Edelman |
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| Rok vydání: | 2019 |
| Předmět: |
medicine.diagnostic_test
business.industry Vascular disease Image quality media_common.quotation_subject Isotropy Magnetic resonance imaging medicine.disease 030218 nuclear medicine & medical imaging Peripheral 03 medical and health sciences 0302 clinical medicine Coronal plane medicine Contrast (vision) Radiology Nuclear Medicine and imaging Nuclear medicine business Image resolution 030217 neurology & neurosurgery Geology media_common |
| Zdroj: | Magnetic Resonance in Medicine. 83:1711-1720 |
| ISSN: | 1522-2594 0740-3194 |
| DOI: | 10.1002/mrm.28032 |
| Popis: | PURPOSE Noncontrast MRA avoids potential risks from gadolinium-based contrast agents. A 2D noncontrast technique, quiescent interval slice-selective (QISS), accurately evaluates the peripheral arteries but has limited spatial resolution along the slice direction. We therefore implemented a prototype thin-slab stack-of-stars version (tsSOS-QISS) with nearly isotropic spatial resolution and tested it in the renal and peripheral arteries of healthy subjects and patients with vascular disease. METHODS The study was approved by the hospital institutional review board. A total of 16 subjects were scanned at 1.5 T: 7 for imaging of the renal arteries and 9 for imaging of the peripheral arteries. For tsSOS-QISS of the renal arteries, each slab consisted of about sixteen 1.3-mm-thick or 2.0-mm-thick slices (interpolated to thirty-two 0.65-mm-thick or 1.0-mm-thick 3D partitions) oriented in an oblique axial or oblique coronal view along the length of the target vessel and was acquired in a breath-hold. For tsSOS-QISS of the peripheral arteries, 20 axial overlapping thin slabs were typically acquired, each with twelve 1.3-mm-thick slices (interpolated to twenty-four 0.65-mm-thick 3D partitions). Image quality, vessel sharpness in multiplanar reconstructions, and normalized SNR were measured. RESULTS Image quality and normalized SNR in the renal and peripheral arteries were significantly better compared with 2D QISS acquired at the same spatial resolution, while vessel sharpness was improved in multiplanar reconstructions of the renal arteries. CONCLUSION The tsSOS-QISS technique overcomes a significant limitation of 2D QISS by providing nearly isotropic spatial resolution with improved image quality, normalized SNR, and vessel sharpness in multiplanar reconstructions. |
| Databáze: | OpenAIRE |
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