Increased image quality and reduced radiation dose and contrast media volume: A holistic approach to intracranial CTA

C. Saade, G. Al-Fout, A. Mayat, P. C. Brennan, Ferdinand Hui, G. Maroun, R. N. Kikano, L. Naffaa

Research output: Contribution to journalArticle

Abstract

Aim: To investigate the dose-length product (DLP) during intracranial computed tomography angiography (CTA) using a patient-specific contrast formula. Materials and methods: Intracranial CTA was performed on 120 patients using 64-channel CT. Patients were subjected in equal numbers to one of two acquisitions/contrast medium protocols. Protocol A, consisted of 80 ml contrast medium and protocol B, involved a novel contrast medium formula. In each protocol, contrast medium and saline were injected at a flow rate of 4.5 ml/s. The DLP and contrast volume (CV) were measured between each protocol and the data obtained were compared using two-tailed independent t-test. Results: Mean arterial vessel attenuation was up to 56% (p<0.01) higher using protocol B compared with A. In the venous system, the mean vessel attenuation was significantly lower in protocol B than A with a maximum reduction of 93% (p<0.001). The mean CV was significantly lower in protocol B (53±10 ml) compared to A (80±1 ml, p<0.001). The scan time was equal in each protocol (B, 4.22±1.2 seconds; A, 4.01±1.3 seconds). A significant reduction in mean DLP was demonstrated in protocol B (3.99±0.22 mSv) compared to A (4.74±0.22 mSv; p=0.02). Conclusion: A significant reduction in CV and DLP during intracranial CTA can be achieved when employing a patient-specific contrast medium formula.

Original languageEnglish (US)
JournalClinical Radiology
DOIs
StateAccepted/In press - Jul 19 2016

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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