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FIGURE 5. (A) Axial HCT and PET data (corrected by HCT) for tumor 10 (patient 5). (B) Corresponding axial ACT and PET data (corrected by ACT). To augment interpretation, both HCT and ACT images are shown with CT level of –700 and window width of 1,000. SUV for HCT PET and ACT PET were 4.3 and 7.4, respectively. SUV increased 70.1% from HCT PET to ACT PET. (C) Coronal HCT, HCT PET, and maximum-intensity projection (MIP) of HCT PET data. (D) Coronal ACT, ACT PET, and MIP of ACT PET data. With ACT, there was a significant reduction in breathing artifacts caused by different breathing states during HCT and PET. Note that ACT did not cover whole lung and was still able to correct for breathing artifacts. On each image, crosshair or arrow indicates tumor location.
