Brain scanning with the Anger multiplane tomographic scanner as a second examination evaluation by the ROC method

Area of Science:

• Nuclear Medicine
• Diagnostic Imaging
• Neurology

Background:

• Brain scintigraphy is a common diagnostic tool for intracranial lesions.
• Distinguishing intracranial lesions from superficial activity can be challenging with standard camera scintigraphy alone.
• Multiplane tomographic scanners offer potential for improved spatial resolution and lesion localization.

Purpose of the Study:

• To evaluate the diagnostic performance of a commercial prototype Anger multiplane tomographic scanner when used in conjunction with brain scintigraphy.
• To compare observer performance interpreting tomographic scans alone, camera scintigrams alone, and combined data.
• To assess the impact of tomographic re-examination on the accuracy of brain scintigraphy.

Main Methods:

• One hundred and one patients underwent brain scintigraphy followed by re-examination with a tomographic scanner.
• Studies were interpreted independently by four observers with varying experience levels.
• Receiver Operating Characteristic (ROC) curves were used to quantify observer performance.

Main Results:

• Observer performance was significantly better when interpreting tomographic brain scans and camera scintigrams together compared to camera images alone.
• Interpreting tomographic scans alone also yielded superior performance compared to camera images alone.
• The tomographic scanner improved accuracy in differentiating intracranial lesions from superficial activity.

Conclusions:

• Re-examination with the Anger multiplane tomographic scanner enhances the diagnostic accuracy of brain scintigraphy.
• The tomographic scanner is particularly beneficial in cases where camera scintigraphy alone struggles to distinguish intracranial from superficial findings.
• Combined interpretation of tomographic scans and scintigrams offers the highest diagnostic performance.