What are the disadvantages to this method in comparison to traditional CT/MRI scans? The only negative mentioned was the sheer amount of data produced (they di

What are the disadvantages to this method in comparison to traditional CT/MRI scans? The only negative mentioned was the sheer amount of data produced (they didn't say anything about processing that data into an image which I assume is also taxing). The necessity of a contrast agent is also an (insignificant, comparatively, but worth mentioning) limitation