Geographical variations and potential low-value neuroimaging examinations in Norway from 2013 to 2022

Area of Science:

• Radiology and Medical Imaging
• Health Services Research
• Healthcare Economics

Background:

• Neuroimaging utilization varies significantly across healthcare systems.
• Identifying and reducing low-value diagnostic imaging is crucial for healthcare efficiency.
• Understanding temporal and geographical trends in neuroimaging is essential for resource allocation.

Purpose of the Study:

• To analyze temporal and geographical variations in neuroimaging use in Norway (2013-2022).
• To investigate the utilization of Brain Magnetic Resonance Imaging (MRI) and Head Computed Tomography (CT) as potentially low-value examinations.
• To estimate the economic impact of low-value neuroimaging in Norway.

Main Methods:

• Data collected from the Norwegian Health Economics Administration (outpatients) and Hospital Trusts (inpatients).
• Descriptive statistical analysis employed to examine trends and variations.
• Inclusion of all inpatient and outpatient neuroimaging services nationwide.

Main Results:

• Average annual neuroimaging examinations: 413,303 (786 per 10,000 inhabitants).
• Overall neuroimaging use increased by 16% during the study period.
• Significant geographical disparities observed in general neuroimaging and specifically for Brain MRI and Head CT, with highest-use regions performing 2-3 times more examinations than lowest-use regions.

Conclusions:

• Temporal and geographical variations exist in the use of general neuroimaging and potentially low-value Brain MRI and Head CT.
• Estimated annual cost of low-value neuroimaging in Norway is approximately EUR 4.0 million.
• Reducing low-value imaging can reallocate resources towards high-value diagnostic procedures.