Abstract #4689

Accuracy & Precision in Quantitative Rotating Frame Relaxometry at High & Ultra-High Magnetic Fields

Irtiza Ali Gilani¹, Raimo Sepponen²

¹Advanced Magnetic Resonance Imaging Centre, Low Temperature Laboratory, Aalto University, Espoo, Uusima, Finland; ²Department of Electronics, Aalto University, Espoo, Uusima, Finland

Rotating frame relaxation rates, T1ρ and T2ρ, are noninvasive and sensitive markers of the neurodegeneration processes in diseases, such as, Alzheimer's and Parkinson's. A comprehensive review of contemporary MRI methods, that can be employed to probe the biophysical mechanisms affecting the T1ρ and T2ρ relaxations of the human tissue, is presented. Spin-Locking and adiabatic radiofrequency irradiation schemes are compared. Additionally, different MRI acquisition strategies for accurate and precise quantitative imaging at the high and ultra-high magnetic field are reviewed.