(Downloading may take up to 30 seconds. If the slide opens in your browser, select File -> Save As to save it.)
Terms and Conditions for Use
Click on image to view larger version.
View larger version (205K)
Figure 4: Adequacy of CT-based attenuation correction in the torso phantom. A, Transverse CT scan for 80 kVp, 10 mA, 0.5 second per rotation, and 1.5:1 pitch. B, Transverse CT scan for 140 kVp, 160 mA, 0.8 second per rotation, and 1.5:1 pitch. C, Transverse PET scan reconstructed by using the CT scan in A for CT-based attenuation correction. D, Transverse PET scan reconstructed by using the CT scan in B for CT-based attenuation correction. Note that the use of very low–dose CT with the larger phantom leads to undercorrection with CT-based attenuation correction.
