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Optimized Management of Endovascular Treatment for Acute Ischemic Stroke

Optimized Management of Endovascular Treatment for Acute Ischemic Stroke

Published on: January 18, 2018

Radiation dose from multidetector row CT imaging for acute stroke.

Anisa Mnyusiwalla¹, Richard I Aviv, Sean P Symons

¹Department of Medical Imaging, Division of Neuroradiology, Sunnybrook Health Sciences Center, University of Toronto, Toronto, ON, Canada.

|June 10, 2009

Summary

Comprehensive computed tomography (CT) imaging for acute stroke delivers a mean effective radiation dose of 16.4 mSv. This high dose necessitates dose reduction strategies and consideration of MRI as an alternative.

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Area of Science:

Radiology
Medical Imaging
Radiation Dosimetry

Background:

Acute stroke management relies on advanced imaging techniques.
Computed tomography (CT) plays a crucial role in diagnosing and characterizing stroke.
Assessing radiation exposure from comprehensive CT protocols is vital for patient safety.

Purpose of the Study:

To quantify the radiation dose delivered by a comprehensive CT imaging protocol for acute stroke.
To evaluate the effective dose and dose-length product (DLP) for each component of the protocol.

Main Methods:

Retrospective analysis of 95 CT examinations over 18 months using an acute stroke protocol.
Protocol included unenhanced head CT, CT angiography (CTA), and CT perfusion/permeability.
Effective doses were calculated from dose-length products (DLP) using region-specific conversion factors.

Main Results:

The mean effective dose for the comprehensive CT acute stroke protocol was 16.4 mSv.
This dose is approximately six times higher than that of an unenhanced CT head scan (2.7 mSv).
CT angiography (CTA) contributed the most to the effective dose (mean 5.4 mSv), followed by CT perfusion (mean 4.9 mSv).

Conclusions:

Comprehensive CT protocols for acute stroke result in significant radiation exposure.
The detailed anatomical and physiological data obtained must be weighed against radiation risks.
Implementing aggressive dose reduction strategies and considering MRI as an alternative are recommended.