O30 Effective radiation dose reduction in diagnostic cerebral angiography using OPTIQ and disease-specific protocols

<h3>Introduction</h3> We have continuously tried various protocol adjustments, including the adoption of low-dose 2D and 3D rotational digital subtraction angiography (DSA), aimed at minimizing radiation exposure during cerebral angiography procedures. And recently used the OPTIQ, an advanced 2D imaging pipeline, automatically adjusts exposure parameters to maintain predefined image quality during cerebral angiography while aiming to reduce radiation dose. <h3>Aim of Study</h3> This study assesses the effectiveness of OPTIQ and customized angiographic protocols for different cerebral vascular pathologies. <h3>Methods</h3> A review was conducted on 465 diagnostic cerebral angiographies performed between August 2023 and January 2024. Angiography was done with utilization of three dose level of angiographic protocols (low-, mid-, and high-dose), customized for indication including aneurysm-diagnostic, treated aneurysm-follow-up, stenoocclusive disease, AVM/AVF. We analyzed radiation metrics such as dose-area product (DAP), air-kerma (AK), and examined imaging parameters tailored to each vascular condition. (Table 1) <h3>Results</h3> The results demonstrated significant radiation reductions across all procedures, with the lowest radiation exposures observed in aneurysm diagnostics (DAP 19.7 ± 10.1 Gy*cm², AK 0.188 ± 0.092 Gy). Although conditions like arteriovenous malformations (AVM) and arteriovenous fistulas (AVF) recorded higher metrics, they were considerably lower than historical averages for these procedures. (Table 2) <h3>Conclusion</h3> The strategic application of OPTIQ and disease-specific protocols has effectively reduced radiation doses for diagnostic cerebral angiography. <h3>Disclosure of Interest</h3> no.