FIGURE 7. (A) Time course of radioactivity concentration in blood, prostate cancer, and urine after intravenous injection of 18F-FECh to untreated prostate cancer patient. SUV was calculated from PET data. (B) PET images of prostate cancer with 18F-FECh and 11C-choline and pathologic specimen of resected prostate (patient 5). 18F-FECh and 11C-choline images were taken at 60 and 20 min after injection, respectively. Red represents SUV of 
4.0. Under diagnosis of stage B2, total prostatectomy and bilateral pelvic lymph node dissection were performed. Pathologic examination indicated adenocarcinoma of prostate in both lobes (Gleason score, 7) and no metastasis in pelvic lymph nodes (pathologic stage, pT2b, pN0). Largest tumor mass, 1.2 cm in diameter, was located in peripheral zone of left lobe.
