Computerized angiographic evaluation of coil density and occlusion rate in embolized cerebral aneurysms
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The recently published article by Kang et al.  is a timely and important contribution to our understanding of the mechanisms of rebleeding in cerebral aneurysms. We nonetheless wish to add the following comments:
To determine the success of embolization, Kang et al. calculate angiographic “coil density” (CD) as according to methods earlier described by Tamatani et al., and which we and others have previously employed [5, 7, 8]. Simplistically, the aneurysm's total volume is first calculated assuming an ellipsoid aneurysm shape; coil volume is calculated as a summation of cylindrical coil shapes (calculated angiographic coil density thus expressed as a percentage of all coil volumes within the estimated aneurysm volume). While recognizing several limitations and drawbacks of this mathematical approximation, Kang et al. nevertheless concluded that calculated CD was the only available objective measurement to estimate acceptable coil embolization at the time of their data...
KeywordsCerebral Aneurysm Aneurysm Neck Occlusion Rate Aneurysm Occlusion Coil Volume
Conflicts of interest
- 4.Plenk H (1986) The microscopic evaluation of hard tissue implants. In: Williams D (ed) Techniques of biocompatibility testing. CRC-Press Inc., Boca Raton Florida, pp 35–81Google Scholar
- 6.Sherif C, Plenk H Jr, Grossschmidt K, Kanz F, Bavinzski G (2006) Computer-assisted quantification of occlusion and coil densities on angiographic and histological images of experimental aneurysms. Neurosurg 58:559–566Google Scholar