Hi @gsd, please read over my experience
https://connect.mayoclinic.org/discussion/tulsa-pro-initial-experience/
When I was at Mayo they were complaining they were having a hard time seeing my lesion as well plus they didn't have Tulsa Pro yet anyway. But my lesion was visible on diffusion weighted images, but at Mayo they always use the contrast enhanced images. I know Dr Woodrum uses heavy loads of contrast. Just in case you may want to try Dr Scionti to see if he can see your lesions. He opts out of medicare, so he is all cash pay, but he knows MRI real well and knows how to use diffusion weighted MRI to see where tumors are. Basically liquid diffuses though tissue and the MRI can pickup the diffusing action, but cancer tends to not diffuse liquids so they can see on the MRI there is an area of low diffusion and that is a tumor. I am sure most places use the contrast enhanced, but when they are doing Tulsa they don't have contrast in you yet, and it is diffusion weighting that plays in. Anyway it is an option for you to check Dr Scionti, he knows how to see lesions not on contrast enhanced MRI.