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Figure 3 | Radiation Oncology

Figure 3

From: The use of positron emission tomography/computed tomography imaging in radiation therapy: a phantom study for setting internal target volume of biological target volume

Figure 3

Effect of motion amplitude on maximum standard uptake value ratio (SUVr), evaluated with water as the phantom background. (a) The variance of SUVr with slow computed tomography (CT) scanning (SCS) was significantly smaller than that of SUVr with helical CT scanning (HCS) for a 37-mm sphere with 10- and 20-mm amplitudes (F-test: p < 0.05). A significant difference was observed when comparing the mean SUVr of 30- and 20-mm motion amplitudes with stationary conditions (Dunnett’s test: p < 0.05). (b) The variance of SUVr with SCS was significantly smaller than that of SUVr with HCS for a 28-mm sphere with 30-mm amplitude (F-test: p < 0.05). Significant differences were observed when comparing the mean SUVr of 30- and 20-mm motion amplitudes with stationary conditions (Dunnett’s test: p < 0.05).

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Radiation Oncology

ISSN: 1748-717X

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