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Coincidence Imaging Using 2 Dual-Head {gamma}-Camera Systems, With and Without Attenuation Correction

Einat Even-Sapir, MD, DSc1, Bella Yuzefovich, DSc2, Elka Miller, MD3, Jean-Paul Bouhnik, PhD2, Osnat Zak, MSc2, Hedva Lerman, MD1, Genady Lievshitz, MD1 and Charles Levin, MD3

1 Department of Nuclear Medicine, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel;
2 Division of Functional Imaging, General Electric Medical System, Haifa, Israel;
3 Department of Radiology, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel



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  		FIGURE 1. A 64-y-old patient with known colorectal cancer. 18F-FDG study was performed for restaging before surgical removal of solitary liver metastasis originally observed on CT. (A) 3-Di-mensional maximum-intensity-projection (MIP) images of CoDe5 without attenuation correction detected single lesion in liver. (B) 3-Dimensional MIP images of CoDe8 with attenuation correction detected multiple liver lesions in both liver lobes. Patient’s management was altered by planned surgery being canceled and patient being referred for chemotherapy and radiofrequency treatment.

 


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  		FIGURE 2. A 57-y-old patient with known colorectal cancer was referred for 18F-FDG study because of rising carcinoembryonic antigen levels. Coincidence images detected increased uptake in anterior abdomen. Fusion of coincidence data with low-resolution CT image localized uptake in dilated collecting system of right ectopic kidney. Patient was disease free on clinical follow-up.

 




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