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In page X-ray:

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X-ray photons carry enough energy to ionize atoms and disrupt molecular bonds.[1] 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 burns and 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.[2] The ionizing capability of X-rays can be used in cancer treatment to kill malignant cells using radiation therapy. It is also used for material characterization using X-ray spectroscopy.[citation needed]