Computerized tomography angiography of ruptured cerebral aneurysms: factors affecting time to maximum contrast concentration

Journal of Neurosurgery
Y NakajimaT Hayakawa

Abstract

This study was conducted to assess the diagnostic value of three-dimensional computerized tomography (3-D CT) angiography in demonstrating cerebral aneurysms in 42 consecutive patients presenting with acute subarachnoid hemorrhage (SAH). To obtain the volume data for selective visualization of the cerebral arteries without enhancement of the venous system, the time delay was established between the injection of contrast medium and the start of scanning by using two different methods. The circulation time was calculated with Schad's formula in the first 13 cases, but the results were not satisfactory. In the 29 subsequent cases the time delay was established using a single-level dynamic CT prescan. The dynamic prescan demonstrated the statistical differences in peak time with regard to patient age, SAH grade, and the postresuscitation state after cardiopulmonary arrest. The 3-D CT angiograms were generated from the volume data by using a voxel transmission method. Computerized tomography angiography obtained after optimally adjusted time delay demonstrated the contour of the cerebral arteries in 97% of cases, and aneurysms were detected in 93%. Enhancement of the cavernous sinus and major cortical veins was avoided. Even in pati...Continue Reading

References

Oct 1, 1977·Journal of Computer Assisted Tomography·H Hacker, H Becker
Apr 1, 1990·Journal of Neurosurgery·J E BailesH Z Baldwin
Jan 1, 1981·Cardiovascular and Interventional Radiology·N SchadA Breit

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Citations

Sep 2, 2010·Neurologia Medico-chirurgica·Mutsumi Nagai, Eiju Watanabe
Apr 12, 2003·Fukushima Journal of Medical Science·Masato MatsumotoFumio Shishido
May 16, 2009·European Journal of Radiology·Shuji SakaiHiroshi Honda
Apr 21, 2007·Surgical Neurology·Reza DashtiJuha E Jääskeläinen
Sep 10, 2002·Journal of Computer Assisted Tomography·Filippo CademartiriGabriel P Krestin
Dec 22, 2002·Interventional Neuroradiology : Journal of Peritherapeutic Neuroradiology, Surgical Procedures and Related Neurosciences·C H Castaño-DuqueP Clavel Laria
Dec 22, 2001·Interventional Neuroradiology : Journal of Peritherapeutic Neuroradiology, Surgical Procedures and Related Neurosciences·F IshidaW Taki
Nov 30, 1999·Interventional Neuroradiology : Journal of Peritherapeutic Neuroradiology, Surgical Procedures and Related Neurosciences·M NomuraO Matsui

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