A 2012 poll in the British Medical Journal (BMJ) indicated that 56 percent of readers believed spending on the therapy was going “too far, too fast”.
The accelerators used in the treatment were called the worlds “most costly medical devices” by some.
This shouldn’t be taken to mean that the therapy does not have uses, but organisations such as Cancer Research UK have warned that only one percent of cancer cases would actually benefit from the treatment over conventional X-ray therapy.
A review of studies on Proton Therapy in Clinical and Translational Radiation Oncology noted that research on the efficacy compared to X-rays is limited in many cases.
The researchers found that only 10 percent of studies were randomised, indicating a high risk of bias in how the technology is reported on.