Demographic changes in brain CT and MR imaging between 1990 and 2010

Area of Science:

• Neuroimaging
• Radiology
• Medical Imaging Analysis

Background:

• Computed tomography (CT) and magnetic resonance imaging (MRI) have transformed neuroimaging.
• The utilization patterns and variations in cranial CT and MRI scans remain under-investigated.

Purpose of the Study:

• To retrospectively analyze the evolution of demographic variables and indications for cranial CT and MRI scans.
• To examine changes in scan usage at a single hospital across three time points: 1993, 2000, and 2009.

Main Methods:

• Retrospective study of in- and outpatients undergoing cranial CT or MRI.
• Data collection included demographic variables and patient characteristics.

Main Results:

• A modest increase in the average patient age was observed.
• Significant increases in the total number of cranial CT examinations, MRI confirmation studies, and repeat examinations were noted.
• Indications such as metastatic disease, head injury, and headache showed a more rapid increase in CT utilization compared to other indications.

Conclusions:

• All analyzed factors (examination volume, age, indication, MR confirmation, repeat scans) demonstrated significant variation over the 16-year study period.
• The findings underscore the need for strict regulations and guidelines for the rational utilization of brain CT and MRI to manage costs and radiation exposure.