Radiation dose from multidetector row CT imaging for acute stroke

Abstract

A comprehensive CT acute stroke protocol delivered a mean effective dose of 16.4 mSv, which is approximately six times the dose of an unenhanced CT head. These high-dose results must be balanced with the benefits of the detailed anatomic and physiologic data obtained. Centers should implement aggressive dose reduction strategies and freely use MR as a substitute.

CT Angiography as a Screening Tool for Dural Arteriovenous Fistula in Patients with Pulsatile Tinnitus: Feasibility and Test Characteristics

“…38 The additional radiation associated with CT angiography in comparison with noncontrast CT of the head has been recently investigated. 39 Standard parameters yield mean effective doses of 2.7 mSv for nonenhanced CT, while CTA delivers 5.4 mSv. As a comparison, however, both studies fall below the relatively commonplace 8-to 9-mSv dosage of an abdominal CT.…”

Adult Horner’s syndrome: a combined clinical, pharmacological, and imaging algorithm

“…25 The limitations include the use of iodinated contrast and ionising radiation, the latter of the order of 4-6 mSv. 26 In cases where there is a contraindication to iodinated contrast, then fat-suppressed MRI and arterial phase contrast enhanced MR angiography (CEMRA) is a suitable but lengthier and less available alternative. Estimation of the degree of increased lifetime risk of cancer from a single-exposure examination is highly technical and dependent on several factors including age of exposure, but may be estimated at between 20 and 30 per 100 000.…”

Dynamic Angiography and Perfusion Imaging Using Flat Detector CT in the Angiography Suite: A Pilot Study in Patients with Acute Middle Cerebral Artery Occlusions

“…Additionally, as a second acquisition, a 3-to 5.5-mSv dose for angiographic MS-CT imaging is necessary, resulting in a total dose of approximately 8 -9 mSv for the entire MS-CT evaluation. [20][21][22] We believe that the new FD-CT application providing perfusion and angiographic evaluation with a single simultaneous acquisition and contrast is advantageous because contrast material volume and dose are less than those in MS-CT imaging.…”