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eLearning

SINAPSE experts from around Scotland have developed ten online modules designed to explain medical imaging. They are freely available and are intended for non-specialists.


Edinburgh Imaging Academy at the University of Edinburgh offers the following online programmes through a virtual learning environment:

Neuroimaging for Research MSc/Dip/Cert

Imaging MSc/Dip/Cert

PET-MR Principles & Applications Cert

Applied Medical Image Analysis Cert

Online Short Courses

Power transcranial Doppler ultrasound in the detection of intracranial aneurysms

Author(s): P. M. White, J. M. Wardlaw, E. Teasdale, S. Sloss, J. Cannon, V. Easton

Abstract:
Background and Purpose - We sought to perform a large, prospective, multicenter, blinded study comparing power transcranial color duplex sonography (power TCDS) with intra-arterial digital subtraction angiography (IADSA) in the detection of intracranial aneurysms, Methods-Contemporaneous TCDS and IADSA examinations were performed in 171 subjects with suspected intracranial aneurysm. Via the temporal bone window, a 2-dimensional hand-held noncontrast transcranial duplex ultrasound imaging system was used operating in power and spectral modes. Sonographers were blinded to clinical history and results of brain CT and IADSA. Results - We found that 157 subjects (92%) had an adequate bone window. Sensitivity per patient was 0.78 (95% CI, 0.66 to 0.87) and 0.46 (95% CI, 0.36 to 0.56) for any anterior circulation aneurysms. Sensitivity was 0.35 (95% CT, 0.24 to 0.46) for aneurysms less than or equal to5 mm and 0.81 (95% CI, 0.62 to 0.94) for aneurysms >5 mm, Accuracy was lower for aneurysms on the cavernous and terminal internal carotid arteries, including posterior communicating artery origin (0.71; 95% CI, 0.63 to 0.79), than for those on the anterior (0.82; 95% CI, 0.74 to 0.89) or the middle cerebral arteries (0.79; 95% CI, 0.71 to 0.86). Conclusions-power TCDS is a promising, inexpensive, noninvasive test for anterior circulation intracranial aneurysms but is less sensitive per aneurysm than alternatives such as CT angiography or MR angiography. Sensitivity is poor for aneurysms less than or equal to5 mm in diameter. The internal carotid artery is the most difficult segment to interpret.

Full version: Available here

Click the link to go to an external website with the full version of the paper


ISBN: 0039-2499
Publication Year: 2001
Periodical: Stroke
Periodical Number: 6
Volume: 32
Pages: 1291-1297
Author Address: