Practical Aspects of novel MRI Techniques in Neuroradiology: Part 2 – Acceleration Methods and Implications for Individual Regions

Abstract

Background Recently introduced MRI techniques facilitate accelerated examinations or increased resolution with the same duration. Further techniques offer homogeneous image quality in regions with anatomical transitions. The question arises whether and how these techniques can be adopted for routine diagnostic imaging. Methods Narrative review with an educational focus based on current literature research and practical experiences of different professions involved (physicians, MRI technologists/radiographers, physics/biomedical engineering). Different hardware manufacturers are considered. Results and Conclusions Compressed sensing and simultaneous multi-slice imaging are novel acceleration techniques with different yet complimentary applications. They do not suffer from classical signal-to-noise-ratio penalties. Combining 3 D and acceleration techniques facilitates new broader examination protocols, particularly for clinical brain imaging. In further regions of the nervous systems mainly specific applications appear to benefit from recent technological improvements. Key points: Citation Format

Small Cerebral Infarcts Mimicked by Nuchal Lymph Nodes in Accelerated High-Resolution Diffusion Magnetic Resonance Imaging

“…This can be used to accelerate imaging and obtain higher resolution images with potentially increased sensitivity for small infarcts. 2,3 Signals from simultaneously excited slices are separated by techniques comparable to parallel imaging. Imperfect slice separation leads to (usually minor) signal contributions from distant slices, so-called slice leakage artifacts.…”