In the next study, it would be desirable to use a more objective method, such as MRI, to provide the reference data. To prevent observational bias, it would be preferable for the next study to be blinded and other possible confounders have to be researched. A novel optical imaging device that assesses multiple joints at once, based on the measurement principle that was employed for a single joint in this study, is expected to provide measurement results that can be validated using accepted methods, such as Doppler ultrasound and MRI, as a reference. Including multiple joints would allow correlating the results with disease activity, as observed with existing tools, such as DAS28. Having the inflammation measurements on a relevant set of joints, such as all joints in hands and wrists, would provide rheumatologists with an objective tool to help in making treatment decisions.