Before revision:  Despite having only two parameters, the model can reconstruct clinical scans quite accurately  .
After revision:  Despite having only two parameters, the model can reconstruct clinical scans quite accurately . We discovered that small time intervals between scans and the presence of background noise create difficulties. Our reconstructed model fits the data well, yet the study on clinical data also reveals shortcomings of the simplistic model. Interestingly, the parameters show significant variability across patients, an indication that these parameters could be useful biomarkers .