Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.
    

concept

X-ray of tilted pelvis of a dog.

DNA double helix

Crystals of a DNA repair protein

X-ray: a dog's hip joints - severe dysplasia

Calcification, coronary artery

X rays : their origin, dosage, and practical application / by W.E. Schall.

X-rays / by B.L. Worsnop and F.C. Chalklin.

Radiography : X-ray therapeutics and radium therapy / by Robert Knox.

The Röntgen rays in medical work / by David Walsh.

Technique medicale de rayons X / par Abel Buguet.

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X-Rays

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X rays : their origin, dosage, and practical application / by W.E. Schall.

X-rays / by B.L. Worsnop and F.C. Chalklin.

Radiography : X-ray therapeutics and radium therapy / by Robert Knox.

The Röntgen rays in medical work / by David Walsh.

Technique medicale de rayons X / par Abel Buguet.