Early single-photon emission computed tomography in mild head trauma. A controlled study

Area of Science:

• Neuroimaging
• Neurology
• Radiology

Background:

• Mild head trauma often results in cognitive deficits not detectable by standard neuroimaging.
• Neuropsychological testing can be limited without a baseline for comparison.
• Computed tomography (CT) and magnetic resonance imaging (MRI) scans may appear normal post-mild head injury.

Purpose of the Study:

• To evaluate the sensitivity of single-photon emission computed tomography (SPECT) in detecting brain injury following mild head trauma.
• To compare SPECT findings in mild head trauma patients with normal controls and patients with HIV encephalopathy.

Main Methods:

• 14 patients with mild head trauma and normal CT scans underwent SPECT imaging within 2 days of injury.
• SPECT results were compared to 15 normal control subjects and 12 patients with mild HIV encephalopathy.
• Two independent, blinded readers assessed the SPECT scans for evidence of trauma.

Main Results:

• SPECT successfully differentiated 10 out of 14 mild head trauma patients from normal controls.
• Normal control subjects' SPECT scans were not misidentified as trauma.
• SPECT could not differentiate between mild head trauma and mild HIV encephalopathy.
• High inter-rater reliability was observed (kappa = 0.72).

Conclusions:

• Single-photon emission computed tomography (SPECT) demonstrates higher sensitivity than CT in detecting brain injury after mild head trauma.
• SPECT may be a valuable tool for diagnosing subtle brain abnormalities in mild head trauma patients.
• Further research is needed to differentiate SPECT findings between mild head trauma and HIV encephalopathy.