pictorial representation, picturing - visual representation as by photography or painting

X-raying, X-radiation - obtaining images by the use of X rays

sonography, ultrasonography, ultrasound - using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs

positron emission tomography, PET - using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain)

magnetic resonance imaging, MRI - the use of nuclear magnetic resonance of protons to produce proton density images

radioscopy, radiology - (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation

medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques