BIO 11 Lecture Notes - Lecture 2: Barium Sulfate, Myelography, Barium
Document Summary
Several imaging techniques are used as diagnostic methods for studying the structures and functions of the body, as well as its organs and systems. X-rays are produced in a vacuum tube that has a cathode and an anode component. It has a sensitive film and is not good to use with pregnant women. The tissues with higher density (bones) will absorb more x-ray, and on a negative film they appear white. Softer tissues that are less dense (muscles) will appear gray, and objects with no density at all and with almost no resistance toward x-ray (air surrounding object or fluid) will appear black. It is an imaging technique used to visualize internal structures. There are five types: myelography: injected around spinal cord and nerve roots, barium swallow/ingestion: drinking barium sulfate contrast medium to study the internal covering layer (mucous membrane) of the digestive tract (intestines). Common names: follow up transcript, buddy on swallow, etc.
