Advantages of high mA photography

It can reduce the pipe flow, reduce the heat generated by the X-ray tube, improve the photo contrast and equipment efficiency, and prolong the life of the X-ray tube.

The amount of X-rays is reduced, and the amount of tissue absorption is reduced, which is beneficial to patient protection.

It is especially suitable for taking pictures of the elderly and can detect lung cancer early.

principle

When high-energy X-rays pass through limbs, their absorption attenuation mode and absorption coefficient are different from those of ordinary energy X-rays, which leads to different contrast changes and thus obtains different effects from ordinary X-rays.

The X-ray produced by the diagnostic X-ray machine is a continuous spectrum. Under a certain nominal tube voltage, photoelectric absorption and Compton Wu Xun You absorption each account for a certain proportion.

In the photon energy range of 10 ~ 100 kev, with the increase of photon energy, the X-ray absorption of limbs is decreasing, while Compton-Wu Xun You absorption is increasing.

When the photon energy is 10keV, the photoelectric absorption is above 95%, and Compton-Wu Xun You absorption is 5%. When the photon energy rises to 100keV, Compton Wu Xun You absorbs more than 95%.