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Proton Therapy

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mermaid View Drop Down
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    Posted: Nov 06 2017 at 10:56pm
Has anyone done proton therapy rather than conventional (photon) radiation?
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123Donna View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote 123Donna Quote  Post ReplyReply Direct Link To This Post Posted: Nov 07 2017 at 8:28am
Mermaid,

This type of therapy looks very promising and more precise.

[Radiation energy causes changes in the cells that injure or destroy them. That's true for both normal cells and cancer cells. The difference between X-rays and protons is that proton therapy deposits much less radiation in the normal tissues that are not being targeted.

As illustration, Mendenhall compares X-rays to a bullet that passes through a person leaving a track of damage. With X-rays, there is an entrance dose, a target dose and an exit dose. As an X-ray passes through the patient, it does most of the damage right under the skin's surface, and by the time it exits, there is less dose. Complications come from radiation that is inadvertently desposited in the normal tissue.

Because doctors can better control where proton therapy releases its highest concentration of energy, proton therapy is believed to affect less healthy tissue and have fewer side effects than traditional radiation therapy. 

"With X-rays, Cyberknife, IMRT, or radialtherapy, it's always the case that the majority of the dose is outside the target," Mendenhall said. "With proton therapy, most of the radiation is deposted inside the cancer — the target.

"The key in oncology is getting the radiation dose in the tumor and keeping it out of the normal tissues. Proton therapy takes us a huge step forward in improving that basic dose distribution. It helps us put most of the radition energy in the tumor instead of the normal tissues. We can leverage that damage."]

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