Optimization for PET Imaging Based on Phantom Study and NECdensity

概要

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In consideration of the requirement for global standardization and quality control of PET imaging, the present studies gave an outline of phantom study to decide both scan and reconstruction parameters based on FDG-PET/CT procedure guideline in Japan, and optimization of scan duration based on NECdensity was performed continuously. In the phantom study, scan and reconstruction parameters were decided by visual assessment and physical indexes (N10mm, NECphantom, QH,10mm/N10mm) to visualize hot spot of 10mm diameter with SUV=4 explicitly. Simultaneously, RC was evaluated to recognize that PET images had enough quantifiably. Scan durations were optimized by Body Mass Index (BMI) based on retrospective analysis of NECdensity. Correlation between visual score in clinical FDG-PET images and NECdensity fell after the optimization of scan duration. Both Inter-institution and inter-patient variability were decreased by performing the phantom study based on the procedure guideline and the optimization of scan duration based on NECdensity which seem finally useful to practice highly precise examination and promote high-quality controlled study.