P160 Innovative reduction in radiation dose for diagnostic cerebral angiography: the efficacy of OPTIQ with IQ36

<h3>Introduction</h3> 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 evaluates the efficacy of OPTIQ in diminishing radiation exposure without compromising image quality in low-dose diagnostic cerebral angiography. <h3>Methods</h3> We conducted a retrospective analysis of 2D diagnostic cerebral angiography data from 100 patients (68 female, 32 male; median age 58, range 31–80 years) assessed for intracranial aneurysms. Image quality was compared between 50 patients using conventional settings and 50 using OPTIQ with an Image Quality level of 36 (IQ36), evaluated by two blinded neurointerventionists on a four-point scale across four regions. Noninferiority in image quality and reductions in radiation dose were statistically analyzed using dose-area product (DAP) and air kerma (AK) measurements. <h3>Results</h3> The OPTIQ group demonstrated noninferior image quality (Reader 1: 3.50 ± 0.38; Reader 2: 3.70 ± 0.26) compared to the conventional group (Reader 1: 3.53 ± 0.37; Reader 2: 3.78 ± 0.19). Interrater reliability was established with a Cronbach’s alpha of 0.835. DAP and AK for 2D DSA in anteroposterior and lateral views were significantly lower in the OPTIQ group (1.94 Gy-cm² and 0.012 Gy, respectively) compared to the conventional group (5.28 Gy-cm² and 0.031 Gy, respectively), marking a dose reduction of 63.26% for DAP and 60.25% for AK. <h3>Conclusion</h3> OPTIQ with IQ36 significantly reduces radiation exposure by approximately 60-63% during 2D diagnostic cerebral angiography without compromising image quality, enhancing procedural safety. <h3>Disclosure of Interest</h3> no.