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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 26:2569-2572, November-December 2005
© 2005 American Society of Neuroradiology

Technical Note
INTERVENTIONAL

Volume Measurement of Intracranial Aneurysms from 3D Rotational Angiography: Improvement of Accuracy by Gradient Edge Detection

Javier Oliván Bescós^a, Marjan J. Slob^b, Cornelis H. Slump^a, Menno Sluzewski^b and Willem Jan van Rooij^b

^a Department of Electrical Engineering, Mathematics and Computer Sciences, Technical University Twente, Enschede, the Netherlands
^b Department of Radiology, St. Elisabeth Ziekenhuis, Tilburg, the Netherlands

Address correspondence to Willem Jan van Rooij, MD, PhD, Department of Radiology, St. Elisabeth Ziekenhuis, Hilvarenbeekseweg 60, 5022 GC Tilburg, the Netherlands

Summary: Manual volume measurement of intracranial aneurysms from 3D rotational angiography varies on different threshold settings and, therefore, is operator-dependent. We developed and validated a method based on automatic gradient edge detection that is independent on threshold settings and provides an accurate and reproducible volume measurement. This method was compared with manual volume calculation in 13 aneurysm phantoms, and the results were significantly more accurate.

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