This is the first article in a series on imaging. An overview of principles involved in imaging by survey radiography, contrast radiography, and fluoroscopy is presented. Anatomic and functional information available by these imaging modes are compared. Survey radiography is convenient and relatively inexpensive but often provides limited anatomic and functional information. Contrast radiography often increases anatomic information and, when used with sequential exposures, enhances functional assessment of various organs. Fluoroscopy provides a continuous but non‐permanent image used in evaluation of organ motion or as a localizing tool. Permanent records are obtained by spot radiographs, spot film cameras, cine fluorography, and/or video tape/ disc systems.
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