Background: Paraclinoid aneurysms (carotid-ophthalmic aneurysms) are surgical challenge, and have been one of the most common indications for endovascular treatment. Nevertheless, coil embolisation continues to be associated with a high rate of residual/recurrent aneurysm. The aim of the study was to find radiological marker for recanalisation in order to facilitate decision process, which would result in fewer treatment-related complications. Methods: Fifty-five patients with saccular ruptured and unruptured paraclinoid intracranial aneurysms treated with coil embolisation were analysed retrospectively. Morphometric measurements were performed in CTA 3D aneurysm models before embolisation. The aneurysm size and volume were measured based on digital subtraction angiography images. The effectiveness of the initial endovascular treatment was determined visually using modified Raymond Roy classification after embolisation and during follow-up digital subtraction angiography. Recanalisation was diagnosed when compaction and filling of the aneurysm occurred, compared to the primary embolisation. Statistical analysis was carried out using Statistica 12.5 software. Results: Statistical analysis has shown that aneurysm height, neck size, packing density and parent artery diameter are risk factors for recanalisation. In addition, we have demonstrated statistically significant independent predictors of recanalisation volume (aneurysm volume, size ratio, aspect ratio, maximal perpendicular height to neck size ration and also aneurysm depth to neck size ratio), which are not themselves risk factors for recanalisation. Conclusions: If the above-mentioned predictors of recanalisation are present preoperatively, microsurgical clipping can be considered.