If you are a patient, you would like to know if the treatment used for the colorectal carcinoma is likely to be effective. On the other hand, the selection of patients for an individual treatment protocol can safe money. I also presumed that the upgrade would require the purchase of expensive new equipment by the hospital, and such expenses do tend to be spread across all patients. MRI is a widely used method, available in all major centers, and most other clinical facilities than can provide state of the art imaging. Spectroscopy can be done readily with any clinical unit that is 1.5T or higher.
Spectroscopy is different from imaging.
The above comment on resolution appears to be related to an imaging concept, not applicable here. That is the central issue. Spectroscopy allows for a noninvasive and dynamic chemical analysis of the drugs and their metabolites in human and animal tumors. That is NOT possible by any other means, at this time. This assumption is incorrect.