RT Journal Article SR Electronic T1 Cumulative Radiation Dose during Hospitalization for Aneurysmal Subarachnoid Hemorrhage JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1377 OP 1382 DO 10.3174/ajnr.A2132 VO 31 IS 8 A1 S.I. Moskowitz A1 W.J. Davros A1 M.E. Kelly A1 D. Fiorella A1 P.A. Rasmussen A1 T.J. Masaryk YR 2010 UL http://www.ajnr.org/content/31/8/1377.abstract AB BACKGROUND AND PURPOSE: Radiation exposure from neurointerventional procedures and diagnostic neuroimaging can be substantial, with many recommendations offered to guide the interventionalist in the conscientious use of ionizing radiation. Patients presenting with an aneurysmal subarachnoid hemorrhage can undergo multiple imaging procedures during a prolonged hospital course. Therefore, we reviewed a cohort of such patients to identify the sources and quantify the cumulative radiation exposure seen during their hospitalization. MATERIALS AND METHODS: We retrospectively reviewed a single-center experience with these patients to define the potential for short-term skin injury and long-term oncologic risk due to absorbed radiation dose and sources of ionizing radiation and their contribution to the cumulative absorbed dose to the cranial tissues. RESULTS: We demonstrated that substantial cumulative doses can be seen, with 87% of the cumulative absorbed dose occurring during neurointerventional procedures and 7% from CT. Mathematic modeling was performed identifying potential techniques to further reduce the cumulative radiation absorbed dose to these patients. CONCLUSIONS: We conclude that repetitive irradiation during the care of patients with aneurysmal subarachnoid hemorrhage can result in significant cumulative doses and a variety of techniques can be applied to reduce this absorbed dose. Use of radiation for diagnostic and therapeutic purposes during prolonged procedures of patients with subarachnoid hemorrhage demands diligence throughout the hospitalization. CTACT angiographyCTDICT dose indexDSAdigital-subtraction angiographyICRUInternational Commission on Radiation Units and MeasurementsMRIMR imagingNSnot significant