TY - JOUR
T1 - Multiple‐readout selective inversion recovery angiography
AU - Wang, Samuel J.
AU - Nishimura, Dwight G.
AU - Macovski, Albert
PY - 1991/1
Y1 - 1991/1
N2 - We have developed a variation of selective inversion recovery (SIR) angiography that allows us to obtain a collection of several angiograms within the same acquisition time previously required to obtain a single image. In basic SIR, a single readout is performed after the tagging inversion pulse. In multiple‐readout SIR, a succession of readout pulses is applied following the inversion pulse. By varying the gradients appropriately during the successive readouts, we can obtain a set of multiple projection‐angle angiograms, or, by appropriately spacing the readouts throughout the cardiac cycle, we can obtain a set of time‐resolved angiograms. This technique allows us to obtain additional spatial or temporal information without increasing total scan time. A sequence of increasing flip‐angle read pulses is used to maintain a constant signal level across the images. A trade‐off exists between SNR and the number of images acquired. © 1991 Academic Press, Inc.
AB - We have developed a variation of selective inversion recovery (SIR) angiography that allows us to obtain a collection of several angiograms within the same acquisition time previously required to obtain a single image. In basic SIR, a single readout is performed after the tagging inversion pulse. In multiple‐readout SIR, a succession of readout pulses is applied following the inversion pulse. By varying the gradients appropriately during the successive readouts, we can obtain a set of multiple projection‐angle angiograms, or, by appropriately spacing the readouts throughout the cardiac cycle, we can obtain a set of time‐resolved angiograms. This technique allows us to obtain additional spatial or temporal information without increasing total scan time. A sequence of increasing flip‐angle read pulses is used to maintain a constant signal level across the images. A trade‐off exists between SNR and the number of images acquired. © 1991 Academic Press, Inc.
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U2 - 10.1002/mrm.1910170127
DO - 10.1002/mrm.1910170127
M3 - Article
C2 - 2067399
AN - SCOPUS:0025966642
SN - 0740-3194
VL - 17
SP - 244
EP - 251
JO - Magnetic Resonance in Medicine
JF - Magnetic Resonance in Medicine
IS - 1
ER -