TY - JOUR
T1 - Intracranial aneurysms
T2 - Depiction on MR angiograms with a multifeature-extraction, ray-tracing postprocessing algorithm
AU - Atlas, Scott W.
AU - Listerud, John
AU - Chung, Willis
AU - Flamm, Eugene S.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1994/7
Y1 - 1994/7
N2 - PURPOSE: To compare a new method for postprocessing data, soft thresholding and depth cueing of unrestricted techniques (STANDOUT), with maximum intensity projection (MIP) for magnetic resonance (MR) angiograms of intracranial aneurysms. MATERIALS AND METHODS: Eighteen patients with 19 intracranial aneurysms were studied. Images generated with STANDOUT were compared with those of MIP for both three-dimensional (3D) time-of-flight (TOF) and 3D phase-contrast (PC) techniques. Images were assessed for detection of aneurysms, scored for delineation of aneurysmal features and overall MR angiographic characteristics, and compared with catheter angiograms. RESULTS: Both postprocessing techniques demonstrated aneurysms on most TOF and PC MR angiograms. Statistically significant improvement of aneurysmal features, aneurysmal neck definition, and delineation of adjacent arterial anatomy was seen on both TOF and PC MR angiograms with STANDOUT. Feature definition was most improved for smaller aneurysms. TOF and PC MR angiograms with STANDOUT showed improved elimination of artifactual intraluminal signal loss in normal large vessels, reduced artifactual narrowing of vessel caliber, and better small vessel delineation. CONCLUSION: STANDOUT has great benefits for postprocessing of intracranial MR angiograms, regardless of the technique of data acquisition.
AB - PURPOSE: To compare a new method for postprocessing data, soft thresholding and depth cueing of unrestricted techniques (STANDOUT), with maximum intensity projection (MIP) for magnetic resonance (MR) angiograms of intracranial aneurysms. MATERIALS AND METHODS: Eighteen patients with 19 intracranial aneurysms were studied. Images generated with STANDOUT were compared with those of MIP for both three-dimensional (3D) time-of-flight (TOF) and 3D phase-contrast (PC) techniques. Images were assessed for detection of aneurysms, scored for delineation of aneurysmal features and overall MR angiographic characteristics, and compared with catheter angiograms. RESULTS: Both postprocessing techniques demonstrated aneurysms on most TOF and PC MR angiograms. Statistically significant improvement of aneurysmal features, aneurysmal neck definition, and delineation of adjacent arterial anatomy was seen on both TOF and PC MR angiograms with STANDOUT. Feature definition was most improved for smaller aneurysms. TOF and PC MR angiograms with STANDOUT showed improved elimination of artifactual intraluminal signal loss in normal large vessels, reduced artifactual narrowing of vessel caliber, and better small vessel delineation. CONCLUSION: STANDOUT has great benefits for postprocessing of intracranial MR angiograms, regardless of the technique of data acquisition.
KW - Aneurysm, cerebral, 1723.73, 1725.73, 1727.73, 1731.73, 1742.73, 1756.73
KW - Cerebral blood vessels, abnormalities, 17.12142
UR - http://www.scopus.com/inward/record.url?scp=0028275263&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028275263&partnerID=8YFLogxK
U2 - 10.1148/radiology.192.1.8208924
DO - 10.1148/radiology.192.1.8208924
M3 - Article
C2 - 8208924
AN - SCOPUS:0028275263
SN - 0033-8419
VL - 192
SP - 129
EP - 139
JO - RADIOLOGY
JF - RADIOLOGY
IS - 1
ER -