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A combined PET/CT scanner: the path to true image fusion

¹ University of Pittsburgh, Pittsburgh, Pennsylvania, USA and ² CPS Innovations, Knoxville, Tennessee, USA

View larger version (53K): [in a new window]   Figure 1. Schematic diagram of the combined PET/CT prototype design that was based on a Siemens Somatom AR.SP CT scanner and an ECAT ART PET scanner.

View larger version (50K): [in a new window]   Figure 2. The biograph commercial combined PET/CT scanner (Siemens Medical Solutions).

View larger version (39K): [in a new window]   Figure 3. A typical combined PET/CT protocol for a patient study acquired on the biograph. For the CT scan, the pitch is 1.1.

View larger version (39K): [in a new window]   Figure 4. A frontal section from a PET/CT scan of a 54-year-old female with a history of cervical cancer; the coronal sections show (a) the CT, (b) the FDG-PET and (c) the fused PET/CT image.

View larger version (75K): [in a new window]   Figure 5. A 74-year-old male with a history of colorectal cancer: (a) a coronal PET image showing focal FDG uptake in a right anterior para-aortic lymph node, (b) the transaxial CT image (upper) and fused PET/CT image (lower) taken at the level indicated by the line in (a), and (c) the fused PET/CT image corresponding to the PET image in (a). The patient was also found to have a lesion in the liver as shown in (d) the coronal PET image, (e) the CT image (upper) and fused PET/CT image (lower) taken at the level indicated by the line in (d), and (f) the fused PET/CT image corresponding to the PET image in (d).