<br><font size=2 face="sans-serif">Hi,</font>
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<br><font size=2 face="sans-serif">I am using the MOBY phantom to do some simulation for quite a while. However, I </font>
<br><font size=2 face="sans-serif">have some question about the SUV values in this phantom. I hope someone may give</font>
<br><font size=2 face="sans-serif">me some advises.</font>
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<br><font size=2 face="sans-serif">I concern is about how to setup the activity in different organs. Because I don't</font>
<br><font size=2 face="sans-serif">know the SUV value of these organs, so I just use the default value provided by</font>
<br><font size=2 face="sans-serif">the general.samp.par from the MOBY developer. Some of the value are listed here:</font>
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<br><font size=2 face="sans-serif"> Body = 2.0000</font>
<br><font size=2 face="sans-serif"> Liver = 75.0000</font>
<br><font size=2 face="sans-serif"> Lung = 4.0000</font>
<br><font size=2 face="sans-serif"> Stomach Wall = 2.0000</font>
<br><font size=2 face="sans-serif"> Stomach Contents = 2.0000</font>
<br><font size=2 face="sans-serif"> Kidney = 75.0000</font>
<br><font size=2 face="sans-serif"> Spleen = 75.0000</font>
<br><font size=2 face="sans-serif"> Small Intestine = 2.0000</font>
<br><font size=2 face="sans-serif"> Bladder = 20.0000</font>
<br><font size=2 face="sans-serif"> Vas deferens = 10.0000</font>
<br><font size=2 face="sans-serif"> Testes = 15.0000</font>
<br><font size=2 face="sans-serif"> Wet Spine Bone = 2.0000</font>
<br><font size=2 face="sans-serif"> Wet Rib Bone = 2.0000</font>
<br><font size=2 face="sans-serif"> Skull = 2.0000</font>
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<br><font size=2 face="sans-serif"> Brain (backgrnd) = 5.0000</font>
<br><font size=2 face="sans-serif"> Neocortical white = 25.0000</font>
<br><font size=2 face="sans-serif"> Neocortical gray = 20.0000</font>
<br><font size=2 face="sans-serif"> Cerebellar white = 15.0000</font>
<br><font size=2 face="sans-serif"> Cerebellar gray = 10.0000</font>
<br><font size=2 face="sans-serif"> Cerebellar nuclei = 30.0000</font>
<br><font size=2 face="sans-serif"> Thalamus = 35.0000</font>
<br><font size=2 face="sans-serif"> Hippocampus = 40.0000</font>
<br><font size=2 face="sans-serif"> Thyroid = 47.0000</font>
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<br><font size=2 face="sans-serif"> LV Myocardium = 75.0000</font>
<br><font size=2 face="sans-serif"> LA Myocardium = 75.0000</font>
<br><font size=2 face="sans-serif"> RV Myocardium = 75.0000</font>
<br><font size=2 face="sans-serif"> RA Myocardium = 75.0000</font>
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<br><font size=2 face="sans-serif"> LV Blood pool = 2.0000</font>
<br><font size=2 face="sans-serif"> LA Blood pool = 2.0000</font>
<br><font size=2 face="sans-serif"> RV Blood pool = 2.0000</font>
<br><font size=2 face="sans-serif"> RA Blood pool = 2.0000</font>
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<br><font size=2 face="sans-serif">From the data above, we can see that the background value is 2, and the values of liver, kidney, spleen </font>
<br><font size=2 face="sans-serif">are 75, which means a suv value of ~37.5. Is this number reasonable or it's a little bit high.</font>
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<br><font size=2 face="sans-serif">Also in the sample file there were definitions as follow:</font>
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<br><font size=2 face="sans-serif">55.0 : large intestine air activity;</font>
<br><font size=2 face="sans-serif">69.0 : small intestine air activity;</font>
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<br><font size=2 face="sans-serif">which mean the large intestine air has a suv of 25.5, and small intestine air has the suv 34.5. </font>
<br><font size=2 face="sans-serif">First, what are the intestine air? From the attenuation map those parts has the same attenuation coefficient as</font>
<br><font size=2 face="sans-serif">the lung, are they some kind of gas in the intestine? Second, why they has such big suv value? </font>
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<br><font size=2 face="sans-serif">If someone has some experience with the real animal, could you make some comments on this issue? Thank you.</font>
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<br><font size=2 face="sans-serif">Yuxuan</font>
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