Many developments were made in the area of endovascular treatment of intracranial aneurysms,
but this procedure also requires a good assessment of vascular anatomy prior to intervention.
Seventy-six cases with brain aneurysms were selected and 1:1 scale 3D printed models were
created. We asked three interventional neurosurgeons with different degrees of experience (ten
years, four years, and a fourth-year resident) to review the cases using CTA (computed tomography
angiogram) with MPR (multiplanar reconstructions) and VRT (volume rendering technique) and
make a decision: coil embolization or stent-assisted coil embolization. After we provided them with
the 3D printed models, they were asked to review their treatment plan. Statistical analysis was performed
and the endovascular approach changed in 11.84% of cases for ten-year experienced neurosurgeons,
13.15% for four years experienced neurosurgeon, and 21.05% for residents. The interobserver
agreement was very good between the ten years experienced interventionist and four years
experienced interventionist when they analyzed the data set that included the 3D printed model.
The agreement was higher between all physicians after they examined the printed model. 3D patient-
specific printed models may be useful in choosing between two different endovascular techniques
and also help the residents to better understand the vascular anatomy and the overall procedure.
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