1. A brief history of proton therapy oncology:
Wilson first proposed the application of high-energy proton beams to treat diseases in 1946.
Tobias performed the first case of proton therapy in 1954.
Clinical studies of proton therapy were conducted in the United States and the former Soviet Union from 1955 to 1975.
Massachusetts General Hospital played a very important role in the development of proton therapy since 1976.
In 1991, the University of Loma Linda in the United States was the first to use a proton gas pedal for medical purposes, which was of epoch-making significance.
In 2004, China Wanjie installed and commissioned the proton therapy system, with a total value of 600 million yuan, the only one in China.
At present, there are only four proton therapy facilities officially operating in the world, i.e., Loma Linda University in the United States (1991), Massachusetts General Hospital (1999), National Cancer Center in Japan (2000), and Wanjie in China (2004). More than 50,000 high-end patients have received proton therapy.
2. Characteristics of proton rays:
Proton is an integral part of the atomic nucleus, weighing 1,835 times that of an electron (photon), positively charged, accelerated by the cyclotron, its energy can reach up to 230 MeV, and enter the muscle body as a low platform operation, arriving at a certain depth of energy to form a sudden outbreak of the Bragg Peak, the peak of the energy is zero. Proton therapy system is a set of huge, complex and extremely precise high-tech equipment, the total length of 70 meters, the cyclotron accelerator weighs 220 tons, high-energy proton beam is a precise and sharp weapon for the treatment of diseases. Proton therapy is the current radiation therapy method with the best efficacy and the least side effects. Proton therapy system is currently the world's most advanced, but also the most expensive ultra-large cutting-edge medical equipment.
3. The technical superiority of proton therapy:
1. High cure rate
2. Minimal side effects
3. High precision
4. Making up for the shortcomings of other treatments
For tumors encircled by important tissues and organs, other treatments are at a standstill, and proton therapy shows its great superiority. It is reported that there is no case of recurrence in the target area of glioma after proton therapy.
Strong penetration performance.
Good dose distribution. Less side scattering, small penumbra.