In medical diagnostic applications, the low energy (soft) X-rays are unwanted, since they are totally absorbed by the body, increasing the dose.

This study will be looking at the effects of radiation therapy, high energy X-rays to destroy cancer cells, on erectile dysfunction.

High energy X-rays, short wavelength photons which can penetrate matter and interact with atoms.

In addition, dual energy X-ray absorptiometry scanning should be considered to evaluate bone density.

Many economical sources of such low energy X-rays were available for delivering quite large fluxes to target samples of modest dimensions.

Low energy X-rays are more likely to be absorbed by the patient's soft tissues.

Only the higher energy X-Rays pass through the filter, appearing as if the Bremsstrahlung continuum had been pinched.

There are many types of sources for high energy X-ray and gamma photons.

Devices of this type create images of high energy X-rays (or other radiations that cast shadows).

Since high energy X-rays are not easily focused, such optics have found applications in various instruments.