Reduced-dose CT protocol for the assessment of cerebral vasospasm

Neuroradiology
N BricoutX Leclerc

Abstract

Despite the increased radiation dose, multimodal CT including noncontrast CT (NCT), CT angiography (CTA), and perfusion CT (PCT) remains a useful tool for the diagnosis of delayed cerebral ischemia (DCI) after aneurysmal subarachnoid hemorrhage (aSAH). The aim of this study was to assess the radiation dose and the image quality between a standard-dose and a reduced-dose multimodal CT protocol. The study group consisted of 26 aSAH patients with a suspicion of DCI on clinical examination and transcranial doppler. Two different CT protocols were used: a standard-dose protocol (NCT 120 kV, 350 mAs; CTA 100 kV, 250 mAs; PCT 80 kV, 200 mAs) from August 2011 to October 2013 (n = 13) and a reduced-dose protocol (NCT 100 kV, 400 mAs; CTA 100 kV, 220 mAs; PCT 80 kV, 180 mAs) from November 2013 to May 2014 (n = 13). Dose-length product (DLP), effective dose, volume CT dose index (CTDI), signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and overall image quality were determined for each examination. The overall image quality was judged as good or excellent in all cases. The reduced-dose protocol allowed a 15 % decrease in both the median total DLP (2438 vs 2898 mGy cm, p < 0.0001) and the effective dose as well as a significant d...Continue Reading

References

Sep 2, 2004·Radiology·Stephan P KloskaWalter Heindel
Oct 21, 2005·Physics in Medicine and Biology·Kenya MuraseTeruhito Mochizuki
Nov 30, 2007·The New England Journal of Medicine·David J Brenner, Eric J Hall
Apr 11, 2009·Stroke; a Journal of Cerebral Circulation·Jennifer A FronteraStephan A Mayer
Jun 10, 2009·Neuroradiology·Anisa MnyusiwallaSean P Symons
Sep 19, 2009·Stroke; a Journal of Cerebral Circulation·Jan Willem DankbaarIrene C van der Schaaf
Nov 7, 2009·AJNR. American Journal of Neuroradiology·M Wintermark, M H Lev
Oct 5, 2010·AJNR. American Journal of Neuroradiology·E D GreenbergP Sanelli
Jul 13, 2011·Neurocritical Care·Chad W WashingtonUNKNOWN Participants in the International Multi-disciplinary Consensus Conference on the Critical Care Management of Subarachnoid He
Aug 6, 2011·AJNR. American Journal of Neuroradiology·B AbelsM M Lell
Apr 6, 2013·AJNR. American Journal of Neuroradiology·K JuluruP C Sanelli
Sep 26, 2013·AJR. American Journal of Roentgenology·Jenny K HoangTerry T Yoshizumi
Oct 16, 2013·European Radiology·Joris M NiestenBirgitta K Velthuis
May 23, 2014·Journal of Neurology, Neurosurgery, and Psychiatry·Karol P BudohoskiPeter J Kirkpatrick

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