TY - JOUR
T1 - Fast angiography using selective inversion recovery
AU - Wang, Samuel J.
AU - Nishimura, Dwight G.
AU - Macovski, Albert
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1992/1
Y1 - 1992/1
N2 - We have developed an enhancement of selective inversion recovery that allows us to obtain high‐resolution angiograms in reduced Scan time. By applying several read pulses following each tagging inversion pulse, we can obtain several phase encodes in each cardiac cycle, thereby reducing the total scan time required for a complete image. Using this technique, high‐resolution angiograms can be obtained in as little as 15 s. Because the phase encodes are collected in short bursts separated by long pauses, care must be taken to maintain uniform signal weighting across phase‐encoding views and avoid ghosting. We use an increasing flip‐angle sequence to equalize signal level weighting across the readouts. The phase encodes are collected in a special order to minimize ghosting. A postprocessing technique is used to further reduce signal nonuniformity between phase encodes. This fast angiography technique can significantly reduce artifacts due to patient motion during scanning and is especially useful for imaging vasculature in regions of the body where respiratory motion is a problem. © 1992 Academic Press, Inc.
AB - We have developed an enhancement of selective inversion recovery that allows us to obtain high‐resolution angiograms in reduced Scan time. By applying several read pulses following each tagging inversion pulse, we can obtain several phase encodes in each cardiac cycle, thereby reducing the total scan time required for a complete image. Using this technique, high‐resolution angiograms can be obtained in as little as 15 s. Because the phase encodes are collected in short bursts separated by long pauses, care must be taken to maintain uniform signal weighting across phase‐encoding views and avoid ghosting. We use an increasing flip‐angle sequence to equalize signal level weighting across the readouts. The phase encodes are collected in a special order to minimize ghosting. A postprocessing technique is used to further reduce signal nonuniformity between phase encodes. This fast angiography technique can significantly reduce artifacts due to patient motion during scanning and is especially useful for imaging vasculature in regions of the body where respiratory motion is a problem. © 1992 Academic Press, Inc.
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U2 - 10.1002/mrm.1910230112
DO - 10.1002/mrm.1910230112
M3 - Article
C2 - 1734172
AN - SCOPUS:0026500088
SN - 0740-3194
VL - 23
SP - 109
EP - 121
JO - Magnetic Resonance in Medicine
JF - Magnetic Resonance in Medicine
IS - 1
ER -