Image Quality of Low-Dose Cerebral Angiography and Effectiveness of Clinical Implementation on Diagnostic and Neurointerventional Procedures for Intracranial Aneurysms

Overview

Journal AJNR Am J Neuroradiol

Specialty Neurology

Date 2019 Apr 6

PMID 30948380

Citations 5

Authors

J Choi

B Kim

Y Choi

N Y Shin

J Jang

H S Choi

S L Jung

K J Ahn

Affiliations

Soon will be listed here.

Abstract

Background And Purpose: Awareness of the potential for exposure to high doses of radiation from interventional radiologic procedures has increased. The purpose of this study was to evaluate image quality and dose reduction of low-dose cerebral angiography during diagnostic and therapeutic procedures for intracranial aneurysms.

Materials And Methods: A retrospective review of 1137 prospectively collected patients between January 2012 and June 2014 was performed. Beginning in April 2013, a dose-reduction strategy was implemented. Subjective image-quality assessment of 506 standard and 540 low-dose cerebral angiography images was performed by 2 neuroradiologists using a 5-point scale and was tested using noninferiority statistics. Radiation dose-area product and air kerma of 1046 diagnostic and 317 therapeutic procedures for intracranial aneurysms were analyzed and compared between groups before (group 1) and after (group 2) clinical implementation of a dose-reduction strategy.

Results: The image quality of the low-dose cerebral angiography was not inferior on the basis of results from the 2 readers. For diagnostic cerebral angiography, the mean dose-area product and air kerma were 140.8 Gy×cm and 1.0 Gy, respectively, in group 1 and 82.0 Gy×cm and 0.6 Gy in group 2 ( < .001, < .001). For the neurointerventional procedure, the mean dose-area product and air kerma were 246.0 Gy×cm and 3.7 Gy, respectively, in group 1 and 169.8 Gy×cm and 3.3 Gy in group 2 ( < .001, = .291).

Conclusions: With low-dose cerebral angiography, image quality was maintained, and implementation of dose-reduction strategies reduced radiation doses in patients undergoing diagnostic and neurointerventional procedures for intracranial aneurysms.

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