Body Cavities
1. Pelvic Cavity – contains the rectum, urinary bladder and parts of the urinary system.
2. Abdominal Cavity – contains the peritoneum, liver, gallbladder, pancreas, spleen, stomach, intestines, kidneys, and major blood vessels.
3. Thoracic cavity – includes the pleural membrane, lungs, trachea, esophagus, pericardium, heart and great vessels.
a. abdominal cavity and thoracic cavity – are major cavities.
Body Cavities July 11, 2009
Collimation of X-ray Beam July 11, 2009
General Rule for Replacement of Tube
Adjust the tube so that the CR is right angles to the structures in the focal spot at a distance that will project the best definition of the structures
Collimation of the x-ray beam
2 reasons why you must collimate the x-ray beam
1. To minimize the amount of radiation to patients and reduce scatter radiation.
2. Allows radiograph that show clear structural delineation and increased contrast by:
a. preventing secondary rad’n from unnecessary exposing surrounding tissues so that the film fog may be avoided.
b. reducing scatter rad’n thereby producing a short-scale radiograph.
