Introduction: Medical imaging (MI) is a critical service that underpins the care journey for many who enter the healthcare system. The subspecialty of Breast Imaging (BI) represents a complex and multimodality MI setting with a well-defined role in the healthcare system. BI holds great potential as a setting to consider opportunities for a medical radiation technologist's (MRT) current role to be modified and leveraged to fulfill novel and advanced roles to optimize patientcentered service.Methods: This study was conducted in three interrelated BI clinics, all at large urban academic hospitals with a common operational infrastructure. It involved three phases; (i) mapping processes and workflows in BI (ii) identification and characterization of care delivery problems (CDPs) within these process maps, and prioritization of opportunities where task shifting might leverage enhanced knowledge, skills, and judgement of MRTs to optimize care. The PEPPA framework -a systematic planning tool for the development and implementation of advanced practice nursing (APN) roles 5 -was used, with the first five of nine steps considered in scope for this pilot project.Results: Twelve distinct BI processes were identified and mapped as swimlane charts; a single clerical workflow leading up to patient checkin to the BI department, and 11 subsequent clinical processes. Each map included swimlanes for MRTs, radiologists, and clerical staff, as relevant, and included processes ranging from routine mammogram and ultrasound orders to stereotactic-guided core biopsies and rapid diagnostic workflows. Across the maps, 9 CDPs were identified; scheduling, radiologist availability, incorrect orders, and coordination of externally-acquired imaging and consults. The inpatient process