Hi Abhinay,
I'm not sure how I've managed to give you the impression that I know
anything about nuclear medicine -- but I don't! So I've CCed this to
the list instead. Hopefully someone can help, sorry I can't,
Ged.
Abhinay Joshi wrote:
> Hello Ged,
>
> I am getting weird values for SUV. Here is what I am trying to do,
>
>
>
> The formula of SUV = mean counts per voxel / (wt*dose) = mean counts per
> voxel/ (BMI*dose)
>
> Calculation of mean counts per voxel= overlaying the VOI (created for
> different voulmes of intereset) on the image and extracting those counts
> in Excel Spreadsheet using MRIcro and then
> calculating the mean/counts.
>
> Suppose I have 10 frames or bins (some are of 30 seconds and some are of
> 5 minutes). If I time correct the values to 30sec, say I divided the
> mean counts per voxel for 5 minutes bins 10 to make them equivalent( i
> mean time correction) to 30 sec mean counts per voxel values. Now If I
> calculate the SUV based on the above formula then the values which I am
> getting for the frames of 30 sec are nearly in the range of 30 instead
> of 1.2 to 5 for 5 minute data. So I don't know where I am going wrong.
> Are the SUV ratios calculated for some standard time point say 1 minute
> or 5 minutes and not for 30 sec or is there any problem in my calculation?
>
> Hope you will advice me.
>
> Thank you
>
> Abhinay D. Joshi
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