| Symbol | Definition |
|---|---|
| A | Anterior |
| Å | Angstrom (10-10 meters) |
| BW | Bandwidth |
| Bo | Static magnetic field |
| B1 | The radio frequency magnetic field |
| B1R | Receive B1 magnetic field |
| B1T | Transmit B1 magnetic field |
| C | Contrast |
| CW | Continuous wave |
| dB | Decibel |
| DBM | Doubly Balanced Mixer |
| E | Energy |
| FID | Free induction decay |
| FT | Fourier transform |
| GBP | Bipolar magnetic field gradient |
| Gf | Frequency encoding gradient |
| Gi | Field gradient in the i direction |
| Gf | Phase encoding gradient |
| Gfmax | Maximum value of phase encoding gradient. |
| Gs | Slice selection gradient |
| g | Gyromagnetic ratio |
| h | Planck's constant |
| IFT | Inverse Fourier transform |
| IM | Imaginary part of a complex number |
| I | Inferior |
| J | Joule |
| k | Boltzmann constant |
| k | killo (103) |
| k | Proportionality constant |
| K | Kelvin temperature |
| L | Left |
| LUT | Look-up table |
| m | milli (10-3) |
| m | micro (10-6) |
| Mo | Equilibrium magnetization |
| MX | X component of magnetization |
| MX' | X' component of magnetization |
| MY | Y component of magnetization |
| MY' | Y' component of magnetization |
| MZ | Z component of magnetization |
| MXY | Transverse component of magnetization |
| MRA | Magnetic resonance angiography |
| MRI | Magnetic resonance imaging |
| n | Resonance frequency in Hertz |
| N+ | Spin population in low energy state |
| N- | Spin population in high energy state |
| Nex | Number of excitations (number of averaes) |
| NMR | Nuclear magnetic resonance |
| w | Resonance frequency in radians per second |
| P | Posterior |
| P | Power |
| p | 3.14159... |
| f | Phase angle |
| ppm | Parts per million |
| Q | RF coil quality factor |
| R | Right |
| RE | Real part of a complex number |
| RF | Radio frequency |
| S | Superior |
| s | Second |
| SNR | Signal-to-Noise Ratio |
| STS | Single-turn solenoid |
| SAR | Specific absorption rate |
| Sinc | Sin(x)/x |
| T | Temperature |
| T | Tesla |
| T1 | Spin-lattice relaxation time |
| T2 | Spin-spin relaxation time |
| T2* | T2 star |
| T2inhomo | Inhomogeneous T2 |
| q | Rotation angle |
| Thk | Slice thickness |
| TE | Echo Time |
| TI | Inversion Time |
| TR | Repetition Time |
| X | Axis in laboratory coordinate system |
| X' | Rotating frame X axis |
| Y | Axis in laboratory coordinate system |
| Y' | Rotating frame Y axis |
| Z | Axis in laboratory coordinate system |
| ADC | apparent diffusion coefficient |
| AST | arterial spin trapping |
| BOLD | blood oxygenation level-dependent contrast |
| CSI | chemical shift imaging |
| DRESS | depth-resolved surface spectroscopy |
| DWI | diffusion weighted imaging |
| EPR | electron paramagnetic resonance |
| EPS | echo planar spectroscopy |
| ESR | electron spin resonance |
| FLAIR | fluid-attenuated inversion recovery |
| ISIS | Image-selected in vivo spectroscopy |
| MR | magnetic resonance |
| MRS | magnetic resonance spectroscopy |
| DWI | perfusion weighted imaging |
| PRESS | point-resolved spectroscopy |
| SENSE | sensitivity encoding |
| SPRITE | single-point ramped imaging with T1 enhancement |
| STEAM | stimulated echo acquisition mode |
| STIR | short T1 inversion recovery |
| SI | spectroscopic imaging |
| VEST | volume excitation using stimulated echoes |
Copyright © 1996-99 J.P. Hornak.
All Rights Reserved.