Final answer:
Markers for a lateral oblique tympanic bulla and TMJ skull radiograph are placed following veterinary radiographic positioning guidelines, with the beam angled specifically for each area and markers placed on the cassette edge to indicate orientation without obscuring anatomy.
Step-by-step explanation:
To place the markers for a lateral oblique tympanic bulla and TMJ (temporomandibular joint) skull radiograph, you'll want to follow specific veterinary radiographic positioning guidelines. The animal should be placed in lateral recumbency with the side of interest facing up. Then, for the tympanic bulla, the beam is directed caudoventrally to rostrodorsally at roughly a 20-25 degree angle. The tympanic bulla should be centered in the beam. For the TMJ, the skull is positioned so that the beam passes through the TMJ at a 10-15 degree angle from the vertical plane, with the cassette positioned under the skull perpendicular to the beam.
Markers are crucial because they indicate the proper orientation and side of the specimen on the radiographs. They should be placed on the edge of the cassette closest to the area of interest to avoid obscuring any anatomical structures. It is essential to use the right technique and positioning to ensure high-quality diagnostic images.