Short-scan Ct Paired With Beam Tailoring Minimizes Patient Dose In Radiosensitive Tissues.

Abstract

Introduction: While computed tomography (CT) is a well-established noninvasive primary diagnostic imaging modality, ionizing radiation limits its clinical use. Tailoring the x-ray beam to focus on a region-of-interest (e.g. the heart) has been recently shown to reduce patient dose while maintaining image quality inside the ROI. Short-scanning (reconstructing images from 180° + fan angle) is also known to reduce patient dose but using these two approaches in combination for additional dose savings has not been explored. We utilize patient-derived segmentations to assess dose savings from scanning the heart with different dose savings approaches.