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The time required to gather a complete set of image data. The total time for performing a scan must take into consideration the additional image reconstruction time when determining how quickly the image(s) may be viewed.
IMAGE (DATA) ACQUISITION TIME
The mathematical process of converting the composite signals obtained during the data acquisition phase into an image.
Lack of homogeneity or uniformity in the main magnetic field.
An imaging sequence that involves successive 180É and 90É pulses, after which a heavily T1-weighted signal is obtained. The inversion recovery sequence is specified in terms of three parameters, inversion time (TI), repetition time (TR) and echo time (TE).
INVERSION RECOVERY (IR)
The time period between the 180° inversion pulse and the 90° excitation pulse in an Inversion Recovery pulse sequence. ISOTOPE - Atomic nuclei that contain the same number of protons, but differ in the number of neutrons in the nucleus of the atom for the element concerned. K-SPACE - a data acquisition matrix containing raw image data prior to image processing. In 2DFT, a line of data corresponds to the digitized NMR signal at a particular phase-encoding level.
INVERSION TIME (TI)