Improved Arterial Visualization in Cerebral CT Perfusion-Derived Arteriograms Compared with Standard CT Angiography: A Visual Assessment Study
Publication year
2012Source
AJNR American Journal of Neuroradiology, 33, (2012), pp. 2171-2177ISSN
Publication type
Article / Letter to editor
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Organization
Radiology
Journal title
AJNR American Journal of Neuroradiology
Volume
vol. 33
Page start
p. 2171
Page end
p. 2177
Subject
N4i 3: Poverty-related infectious diseases ONCOL 5: Aetiology, screening and detection; ONCOL 5: Aetiology, screening and detection; NCEBP 14: Cardiovascular diseases ONCOL 5: Aetiology, screening and detectionAbstract
BACKGROUND AND PURPOSE:Invasive cerebral DSA has largely been replaced by CTA, which is noninvasive but has a compromised arterial view due to superimposed bone and veins. The purpose of this study was to evaluate whether arterial visualization in CTPa is superior to standard CTA, which would eliminate the need for an additional CTA scan to assess arterial diseases and therefore reduce radiation dose.MATERIALS AND METHODS:In this study, we included 24 patients with subarachnoid hemorrhage for whom CTA and CTP were available. Arterial quality and presence of superimposed veins and bone in CTPa were compared with CTA and scored by 2 radiologists by using a VAS (0\%-100\%). Average VAS scores were determined and VAS scores per patient were converted to a 10-point NRS. Arterial visualization was considered to be improved when the highest rate (NRS 10, VAS > 90\%) was scored for arterial quality, and the lowest rate (NRS 1, VAS < 10\%), for the presence of superimposed veins and bone. A sign test with continuity correction was used to test whether the number of cases with these rates was significant.RESULTS:Average VAS scores in the proximal area were 94\% (arterial quality), 4\% (presence of bone), and 7\% (presence of veins). In this area, the sign test showed that a significant number of cases scored NRS 10 for arterial quality (P < .02) and NRS 1 for the presence of superimposed veins and bone (P < .01).CONCLUSIONS:Cerebral CTPa shows improved arterial visualization in the proximal area compared with CTA, with similar arterial quality but no superimposed bone and veins.
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- Academic publications [238441]
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- Faculty of Medical Sciences [90373]
- Open Access publications [97504]
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