CGMH is going to be the first proton treatment center in Taiwan. Proton therapy is an advanced form of radiation therapy that uses high-energy particles (protons) instead of X-rays (photons) to deliver dose to a target volume. Protons have an excellent physical property (Bragg peak), which released large amount energy at desired depth, but has fewer doses before the target and no dose after target. This property can protect normal organ after the target and reduce the integral dose to the normal tissue.

• The advantage of proton therapy

  The energy of proton beam is selected so that the Bragg peak coincides with the treatment depth. Since nearly all the tumors in the clinics are larger than the width of one Bragg peak, a Spread-Out Bragg Peak (SOBP) by superimposing multiple beams with different energies is required. The Bragg peak or SOBP ensures a limited dose deposition in the entrance region and no exit dose behind the target volume. This greatly improves dose conformity and the ability to spare healthy tissue and allows clinicians to treat tumors close to vital organs.
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