Does anyone know the physical difference between X-ray used in radiotherapy and X-ray photography? Like radiation dose? Thank you very much ! ! !

The wavelength of x-rays ranges from about 0.0 1 angstrom to 100 angstrom. Radiotherapy generally uses 0.0 1 ~ 0. 1 angstrom, and diagnosis (generally divided into photography and fluoroscopy) is about 0. 1 ~ 1 angstrom.

According to the simple man-hour P=hv (frequency), the shorter the wavelength, the shorter the X-ray energy.

Physically, radiotherapy destroys abnormal human cells, especially cancer cells that grow out of control, so it needs more energy.

Therefore, the wavelength of light used in radiotherapy is not limited to X-rays, but also includes R-rays and so on.

Diagnosis only needs to be able to cross the human body, and too much energy will destroy normal cells.

The radiation dose depends on the working mode and the position of radiotherapy (diagnosis). Generally speaking, the radiation dose is much greater than the diagnostic dose.