MRI Glossary



ADC - Apparent Diffusion Coefficient CHESS - CHEmical shift Selective Saturation CSI - Chemical Shift Imaging DCE - Dynamic Contrast Enhanced DNR - Diffusion to Noise Ratio DTI - Diffusion Tensor Imaging DWMRI - Diffusion Weighted MRI EPI - Echo Planar Imaging ETL - Echo Train Length FBPR - Filtered BackProjection Reconstruction FID - Free Induction Decay FLAIR - FLuid Attenuated Inversion Recovery FA - Fractional Anisotropy fMRI - functional Magnetic Resonance Imaging FOV - Field Of View FRFSE - Fast Recovery Fast Spin Echo FSE - Fast Spin Echo IR - Inversion Recovery IRP-SPGR - Inversion Recovery Prepared - SPoiled GRadient echo LCModel - Linear Combination of Model spectra (MRS Baseline) MRA - Magnetic Resonance Angiography MRI - Magnetic Resonance Imaging MRS - Magnetic Resonance Spectroscopy NEX - Number of EXcitations PR - Projection Reconstruction PRESS - Point REsolved SpectroScopy PROPELLER - Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction rCBV - relative Cerebral Blood Volume RFSE - Radial Fast Spin Echo ROI - Region of Interest SE - Spin Echo SPGR - SPoiled Gradient Recall Echo SPM - Statistical Parametric Mapping SNR - Signal to Noise Ratio SSEPI - Single Shot Echo Planar Imaging SSFSE - Single Shot Fast Spin Echo T1 - Longitudinal Relaxation Time (in general T1 > T2) T2 - Transverse Relaxation Time (in general T2 < T1) T2* - T2 Star - Total Decay (»2T2) Equals Sum of Decay due to other macro-molecular fields (T2) and susceptibility tissue variation. TE - Echo Delay Time TR - Repetition Time TSE - Turbo Spin Echo VOI - Volume Of Interest