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EJNMMI Physics
Fig. 5 | EJNMMI Physics

Fig. 5

From: The effects of various penalty parameter values in Q.Clear algorithm for rectal cancer detection on 18F-FDG images using a BGO-based PET/CT scanner: a phantom and clinical study

Fig. 5

Cross-sectional view of a 58-year-old rectal cancer patient (68 kg, 155 cm), receiving 4 MBq/kg of 18F-FDG intravenously. The OSEM reconstruction was utilized with four iterations and 24 subsets with 4.8 mm Gaussian post-filtering. Twenty-five iterations with β value of 100, 200, 300, 400, and 500 were used in Q.Clear reconstruction. In each image, the blue arrow points to a lung metastasis with diameter ⩽ 10 mm (small lesion), while the red arrow indicates a primary rectal tumor with diameter > 10 mm (large lesion). The SUVmax of the lesions and the noise in the liver are displayed for each reconstruction

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