ASL (Arterial Spin Labeling) is an MR technique using the water in arterial blood as an endogenous contrast agent to evaluate perfusion non-invasively. ASL is available as a 2D EPI sequence (ASL 2D) and as a 3D GRASE sequence (ASL 3D). ASL 2D includes inline calculation of relCBF maps for an evaluation of perfusion. Improvements in 3D ASL and 3D PCASL with syngo MR XA31A, ASL 3D also includes and inline estimation of relCBF and BAT (bolus arrival time). Additionally, multi-TI 3D ASL measurements can be performed.
From syngo MR XA20 onwards the use of pseudo continuous Arterial Spin Labeling (PCASL) significantly improves both 2D or 3D brain perfusion imaging with over 30% more slices for larger coverage and at shorter acquisition time1.
- Acute stroke
- Evaluation of TIA (Transient Ischemic Cerebral Attack) and chronic cerebrovascular disease
- Degenerative diseases like Alzheimer’s disease and frontotemporal dementia
- Evaluation of brain tumors
- Functional evaluation of the brain with BOLD techniques
- Intervention planning