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<jats:sec><jats:title>Background and purpose</jats:title><jats:p> The purpose of this article is to estimate the distribution of superselective intra-arterial chemotherapy (IAC) delivery to ocular target tissue using quantitative digital subtraction angiography (qDSA). </jats:p></jats:sec><jats:sec><jats:title>Materials and methods</jats:title><jats:p> From March 2010 to January 2016, 50 ophthalmic artery contrast DSAs obtained immediately prior to IAC infusions in 22 patients were analyzed. This study was conducted under a retrospective review IRB (no. 10-01862). Parametric color-coded DSAs (iFlow, Siemens Medical) were post-processed (MATLAB, The Mathworks Inc.) using two methods: two box regions of interest (pre-retina and globe) and four custom regions of interest (ROIs—ophthalmic artery, choroid, supraclinoid internal carotid artery (ICA), cavernous ICA). Mean interobserver reliability of custom ROI selection is presented as a 95% confidence interval of interclass correlation, and fractional chemotherapy delivery to selected ROIs as means ± standard deviation in this study. </jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p> The estimated fraction of chemotherapy delivered to the globe with the first method was 79.5%. Percentage regional delivery using the second method was as follows: ophthalmic artery, 85.8%; choroid, 60.5%; supraclinoid ICA, 14.2%. The cavernous ICA ROI (encompassing distal catheter and potential reflux) gave a signal equivalent to 9.3% of total delivery. </jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p> Parametric color-coded qDSA can estimate the fraction of IAC delivered to the retina and other orbital structures in ocular retinoblastoma patients. This information can inform delivery location and dosing strategies on a patient-specific basis. </jats:p></jats:sec>

Original publication

DOI

10.1177/1591019917749825

Type

Journal article

Journal

Interventional Neuroradiology

Publisher

SAGE Publications

Publication Date

04/2018

Volume

24

Pages

214 - 219