2017年11月
Clinical evaluation of time-of-flight MR angiography with sparse undersampling and iterative reconstruction for cerebral aneurysms
NMR IN BIOMEDICINE
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 30
- 号
- 11
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/nbm.3774
- 出版者・発行元
- WILEY
Compressed sensing (CS) MRI has just been introduced to research areas as an innovative approach to accelerate MRI. CS is expected to achieve higher k-space undersampling by exploiting the underlying sparsity in an appropriate transform domain. MR angiography (MRA) provides high spatial resolution information on arteries; however, a relatively long acquisition time is necessary to cover a wide volume. Reduction of acquisition time by CS for time-of-flight (TOF) MR angiography (Sparse-TOF) is beneficial in clinical examinations; therefore, the clinical validity of Sparse-TOF needs to be investigated. The aim of this study was to compare the diagnostic capability of TOF MRA between parallel imaging (PI)-TOF with an acceleration factor of 3 (annotated as 3x) and Sparse-TOF (3x and 5x) in patients with cerebral aneurysms. PI-TOF (3x) and Sparse-TOF (3x and 5x) imaging were performed in 20 patients using a 3 T MRI system. Aneurysms in PI-TOF (3x) and Sparse-TOF (3x and 5x) were blindly rated as visible or scarcely visible by neuroradiologists. The neck, height and width of aneurysms were also measured. Twenty-six aneurysms were visualized and rated as visible in PI-TOF (3x) and Sparse-TOF (3x and 5x), with excellent agreement between two raters. No significant differences were found in measured neck, height or width of aneurysms among them. Sparse-TOF (3x and 5x) were acquired and reconstructed within 6 min, and cerebral aneurysms were visible in both of them with equivalent quality to PI-TOF (3x). Sparse-TOF (5x) is a good alternative to PI-TOF (3x) to visualize cerebral aneurysms.
- リンク情報
- ID情報
-
- DOI : 10.1002/nbm.3774
- ISSN : 0952-3480
- eISSN : 1099-1492
- PubMed ID : 28796397
- Web of Science ID : WOS:000417914100008