The PA (posterior-anterior) film is obtained with the patient facing the cassette and the x-ray tube 6 feet away. This distance diminishes the magnification of structures closer to the x-ray tube. Heart is close to normal size as possible.
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Bradawl or Pricker. This carpentry awl has a beveled tip and is used to make pilot holes in wood for brads and screws. Bridle or Harness Awl. Used by leatherworkers to make holes in leather prior to stitching, this type has a diamond-shaped point and comes with a range of diameters to suit the work.Saddlerâs Awl.his carpentry awl has a beveled tip and is used to make pilot holes in wood for brads and screws. Bridle or Harness Awl. Used by leatherworkers to make holes in leather prior to stitching, this type has a diamond-shaped point and comes with a range of diameters to suit the work. Saddlerâs Awl.