Introduction to Positron Emission Tomography (PET) Imaging

I posted this link to ask if there are any startups or academics doing innovative work with the data currently collected from PET scanners.

The imaging I see, and that my oncologist sees as interpreted by a radiologist, shows a 3d spinning liver (and associated organs) where the tumors light up brightly. Their relative brightness is read by the radiologist to determine their size.

What I'm wondering is if the data that was captured can be re-interpreted to provide more accurate tumor location automatically.

The linked article gives a good (IMHO) layman's explanation of the system - but I don't understand if the final result is the image, or if somewhere in the DICOM files there exists a machine readable data set, perhaps an XYZ scatterplot with the gamma ray pairs represented such that you could in effect do ray tracing to precisely place tumors and their exact size relative to features of the relevant organ. (eg, portal vein in the liver)

Last year, this came out:

http://makezine.com/2015/01/14/hands-on-health-care/

Its relevancy to my case is that I while I have metastasis to both lobes, one mass in particular seems to be straddling between the two, making resection unlikely.

I'm wondering if having this information would make a surgeon's job easier? Or if they even care? Is it pointless to pursue this because obviously smarter people will have already thought about this?