Ionizing radiation hazard symbol<unk>  photons carry enough energy to ionize atoms and disrupt molecular bonds. This makes it a type of ionizing radiation, and therefore harmful to living tissue. A very high radiation dose over a short period of time causes radiation sickness, while lower doses can give an increased risk of radiation-induced cancer. In medical imaging, this increased cancer risk is generally greatly outweighed by the benefits of the examination. The ionizing capability of<unk> s can be utilized in cancer treatment to kill malignant cells using radiation therapy. It is also used for material characterization using<unk>  spectroscopy. Hard<unk> s can traverse relatively thick objects without being much absorbed or scattered. For this reason,<unk> s are widely used to image the inside of visually opaque objects. The most often seen applications are in medical radiography and airport security scanners, but similar techniques are also important in industry (e.g., industrial radiography and industrial CT scanning) and research (e.g., small animal CT). The penetration depth varies with several orders of magnitude over the<unk>  spectrum. This allows the photon energy to be adjusted for the application so as to give sufficient transmission through the object and at the same time provide good contrast in the image.<unk> s have much shorter wavelengths than visible light, which makes it possible to probe structures much smaller than can be seen using a normal microscope. This property is used in<unk>  microscopy to acquire high-resolution images, and also in<unk>  crystallography to determine the positions of atoms in crystals.
X-ray
Scan
Medicine chest 
Medicine chest
Radiography
Radiochemistry
Hip examination
Radiology