The analysis of this research is based on the comparative technical efficiency processes of computed tomography (CT) and magnetic resonance imaging (MRI) service delivery in the seven corresponding regions of the National Health Service (NHS) in England. Two inputs—estimated numbers of radiographers and scanner systems—and one output—the volume of exams performed (2022/23)—were used in a Data Envelopment Analysis (DEA). Four distinct DEA models: CCR, BCC Input-Oriented, BCC Output-Oriented, and the Additive model were used to compute the efficiency. The outcome of the analysis was that the majority of the NHS regions witnessed the relative technical efficiency of a high level. For the MRI services, London and the East of England turned out to be the most efficient decision-making units (DMUs). The East of England and the Midlands scored the highest in efficiency for CT services. This implies that there might be certain factors like economies of scale, specialized high-throughput centers, and optimal resource allocation strategies that substantially contribute to such performance. The identified benchmarks, although performance is overall strong, provide health policy with insights. The results point out specific regions whose operational practices can act as a model for others, implying that targeted efficiency improvement is possible without the need for increasing the resource levels but rather through better use of existing assets.