Symbol | Definition |
---|---|
A | Anterior |
Å | Angstrom (10^{-10} meters) |
BW | Bandwidth |
B_{o} | Static magnetic field |
B_{1} | The radio frequency magnetic field |
B_{1R} | Receive B_{1} magnetic field |
B_{1T} | Transmit B_{1} magnetic field |
C | Contrast |
CW | Continuous wave |
dB | Decibel |
DBM | Doubly Balanced Mixer |
E | Energy |
EPI | Echo Planar Imaging |
ESR | Electron Spin Resonance |
FID | Free induction decay |
fMRI | functional MRI |
FT | Fourier transform |
G_{BP} | Bipolar magnetic field gradient |
G_{f} | Frequency encoding gradient |
G_{i } | Field gradient in the i direction |
G_{φ} | Phase encoding gradient |
G_{φmax} | Maximum value of phase encoding gradient. |
G_{s} | Slice selection gradient |
γ | 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 | kilo (10^{3}) |
k | Proportionality constant |
K | Kelvin temperature |
L | Left |
LUT | Look-up table |
m | milli (10^{-3}) |
μ | micro (10^{-6}) |
M_{o} | Equilibrium magnetization |
M_{X } | X component of magnetization |
M_{X'} | X' component of magnetization |
M_{Y } | Y component of magnetization |
M_{Y'} | Y' component of magnetization |
M_{Z } | Z component of magnetization |
M_{XY } | Transverse component of magnetization |
MRA | Magnetic resonance angiography |
MRI | Magnetic resonance imaging |
ν | Resonance frequency in Hertz |
N^{+} | Spin population in low energy state |
N^{-} | Spin population in high energy state |
Nex | Number of excitations (number of averages) |
NMR | Nuclear magnetic resonance |
ω | Resonance frequency in radians per second |
P | Posterior |
P | Power |
π | 3.14159... |
φ | 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 |
T_{1 } | Spin-lattice relaxation time |
T_{2 } | Spin-spin relaxation time |
T_{2}* | T_{2} star |
T_{2inhomo } | Inhomogeneous T_{2 } |
θ | 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 |
CE | Contrast Enhanced |
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 |
HYPR | HighlY constrained backPRojection |
IDEAL | Iterative Decomposition of water and fat with Echo Asymmetry and Least-squares estimation |
ISIS | Image-selected in vivo spectroscopy |
k-t | k-space and time |
k-t-BLAST | k-space and time Broad-use Linear Acquisition Speed-up Technique |
k-t-SENSE | k-space and time Sensitivity Encoding |
MR | magnetic resonance |
MRS | magnetic resonance spectroscopy |
PC | Phase Contrast |
PR | Projection Reconstruction |
PWI | perfusion weighted imaging |
PRESS | point-resolved spectroscopy |
RARE | rapid acquisition relaxation enhanced |
PROPELLER | Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction |
SENSE | sensitivity encoding for MRI |
SMASH | simultaneous acquisition of spatial harmonics |
SPACE-RIP | sensitivity profiles from an array of coils for encoding and reconstruction in parallel |
SPRITE | single-point ramped imaging with T_{1} enhancement |
STEAM | stimulated echo acquisition mode |
STIR | short T_{1} inversion recovery |
SI | spectroscopic imaging |
TRICKS | Time-Resolved Imaging of Contrast KineticS |
VEST | volume excitation using stimulated echoes |
VIPR | Vastly undersampled isotropic projection imaging |
Copyright © 1996-2017 J.P. Hornak.
All Rights Reserved.