[Respiratory motion correction in positron emission tomography imaging using elastic registration based on sinogram...

Area of Science:

• Medical Imaging
• Nuclear Medicine
• Image Processing

Background:

• Respiratory motion during positron emission tomography (PET) data acquisition degrades image quality.
• Motion artifacts obscure important diagnostic information in PET scans.

Purpose of the Study:

• To develop and evaluate a novel respiratory motion correction method for PET imaging.
• To improve the quality and diagnostic accuracy of PET scans affected by respiratory motion.

Main Methods:

• A three-level grids B-spline elastic method was applied to correct denoised and reorganized sinograms.
• Simulated data using the GATE toolkit and the NCAT respiratory motion model were utilized for experimental validation.

Main Results:

• The proposed method significantly improved the quality of respiratory-gated PET images.
• Motion blur was effectively reduced, and structural information in the images was restored.
• Experimental results demonstrated the efficacy of the B-spline elastic registration for motion correction.

Conclusions:

• The B-spline elastic registration method is effective for correcting respiratory motion artifacts in PET imaging.
• This technique offers a valuable tool for enhancing the diagnostic performance of PET scans.