What is a proton therapy?
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What is a proton therapy?
Imagine a 196 - ton kill tumour of the machine, the monster can target tumor patients with submillimeter accuracy and not damage the surrounding healthy tissue, but also can be side effects to a minimum.In short, this is the proton therapy.
Over the years, the conventional radiotherapy continuous development and improvement, can effectively control many cancer.However, owing to the X-ray beam is the primary of secondary electrons and photons, they release energy along the beam path to tumor target area and outside area, and radiation to the tumor site before and after the healthy tissue.This "shoot dosage irradiation damage of normal tissue near the tumor or areas of interest or organ, may lead to health problems in the future.
Proton therapy has the advantage that the doctor can control the proton release the energy enough to kill tumor cells.The protons through the human body, will slow down and interact with electronic, releasing energy.The highest point of the energy release called "Bragg peak".The doctor can specify the location of the Bragg peak, cause the biggest blow to target cancer cells.Proton beam with conformal shape and depth of the tumor, while protecting the healthy tissue and organs.
It is a mechanism of action?
The best way to understand the proton therapy mechanism is to understand the proton accelerator or synchrotron and beam transmission system of the internal physics and engineering.
- Proton's journey began in the ion source.In less than a second time, hydrogen atoms are separated into negatively charged electrons and positively charged protons.
- Proton via vacuum tube into the linear accelerator, in just a few microseconds, proton energy can reach 7 million electron volts.
- Proton beam into the synchrotron, will stay in vacuum tubes, due to the speed, the energy will rise to 70 million - 250 million electron volts, it is enough to put the beams at any depth of the patient's body.
- After leaving the synchrotron, proton passes through beam delivery system composed of a series of magnet, conformal, aggregation and guide users to proton beam therapy.
- In order to ensure that each patient can accept safely and efficiently the doctor prescription treatment, treatment facilities is composed of computer and security system of network control.Frame can rotate 360 degrees, can send proton beam from any Angle.
- Protons through the nose when, after a special device (collimator) was carried out on the proton beam shaping, then through a special device (compensator) for proton 3-d shape and sent to the tumor in depth.
- The energy, the largest moving 125000 miles per second, a proton beam is equivalent to two-thirds of the speed of light.
- Proton from hydrogen to patients usually move to 313000 miles.
Pencil beam and intensity-modulated proton therapy
MD Anderson proton therapy center team innovation way of proton therapy, benefit the patients.Team take the lead in research and development to use the pencil beam proton therapy, also known as scanning beam, and intensity-modulated proton therapy (IMPT).We are one of the few worldwide can provide patients with one of these types of proton therapy center.
Pencil beam technology and IMPT according to the advantage of proton therapy and research and development.Due to a proton beam is only a few millimeters wide, the advanced proton therapy combined with the advantages of accurate and efficient, treatment of patients with tumor able, to minimize impact on patients quality of life, including during and after treatment.Complex treatment planning systems and a large number of magnets can guide will narrow proton beam radiation dose one layer of perfect "picture".
Pencil beam can very effectively in the treatment of most complicated tumors, such as prostate, brain, eye, and the children's cancer, not harm health organization and other important parts at the same time.IMPT to strong and precise doses of protons to complex tumor site and adjacent to the spinal cord or embedded concave type of head and neck or skull base tumor, including nasal and sinus cavity, oral cavity, salivary glands, the tongue, tonsils, and throat.
Who will benefit from proton therapy?
Proton therapy is suitable for there is a clear boundary of solid tumors, which did not spread to other parts of the tumor.Proton therapy without surgery, is the ideal treatment of tumor surgery.
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