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Dual-Energy X-Ray Absorptiometry (DEXA): A method of measuring your body fat that also determines where the fat is located on your body, a more relevant health indicator.

X-Ray Spectrum: A set of characteristic x-ray frequencies or wavelengths produced by a substance used as a target in an x-ray tube. Each element has a characteristic x-ray spectrum, and there is a strong co . . . View Full Definition

X-Ray Tube: A cathode ray tube that focuses energetic streams of electrons on a metal target, causing the metal to emit x-rays.

X-Rays: The portion of the electromagnetic spectrum that has a very short wave length. It has a wave length longer than gamma rays, yet shorter than visible light. X-rays can penetrate various thick . . . View Full Definition

X-Ray Diffraction Pattern: Interference patterns created by x-rays as they pass through a solid material. Studying x-ray diffraction patterns gives detailed information on the three-dimensional structure of crystals, . . . View Full Definition

X-Ray Crystallography: Determination of three dimensional arrangement of atoms in a crystal by analysis of x-ray diffraction patterns.

Occlusal X-Ray: An intraoral x-ray taken with the film held between the teeth in biting position.

X-Ray: A very high energy form of electromagnetic radiation (though not as high energy as gamma rays). X-rays typically have wavelengths from a few picometers up to 20 nanometers. X-rays easily pen . . . View Full Definition

Bitewing X-Rays: X-rays taken of the crowns of teeth to check for decay.

X-Ray Diffraction: Technique utilized to study atomic structure of crystalline substances by noting the patterns produced by x-rays shot through the crystal.