A simplified method to integrate metabolic images in stereotactic procedures using a PET/CT scanner

Area of Science:

• Medical Imaging
• Radiology
• Image Processing

Background:

• Accurate coregistration of positron emission tomography (PET) and computed tomography (CT) images is crucial for integrating functional and anatomical data.
• Existing methods for PET/CT image fusion can be complex and time-consuming.

Observation:

• A novel method utilizes a computed tomography (CT) indicator box for coregistering PET images with CT and magnetic resonance imaging (MRI).
• The procedure involves fixing a stereotactic frame to the patient and positioning them in a PET/CT scanner with the CT indicator box.
• PET images are acquired using [18F]fluorodeoxyglucose or [11C]choline, then exported with CT data in DICOM 3 format.

Findings:

• Homemade software performs multimodal image fusion by overwriting PET image values to corresponding CT points using a threshold algorithm.
• The CT indicator box simplifies the process by eliminating the need for a radioactive solution.
• The localization accuracy of PET images is primarily limited by the slice thickness.

Implications:

• This simplified coregistration method enhances the integration of PET, CT, and MRI data.
• The technique offers improved accuracy for diagnostic imaging and potential applications in image-guided interventions.
• Further validation in diverse clinical scenarios is warranted to fully assess its utility.