Principles Of Panoramic Radiography

Principles Of Panoramic Radiography

Question 1. Discuss the principles, indications and contraindications of panoramic radiography.
or
Write short note on indications and contraindiacations of panoramic radiography.
Answer.

“Steps to explain key principles of panoramic radiography: Rotation center vs focal trough: Q&A guide”

Panoramic Contraindications

• Younger children are on risk while taking panoramic radiographs.
• Where fie anatomic details are recorded.
• For detecting small carious lesions
• For detecting fie structures of marginal periodontium
• In periapical diseases
• For equal magnification

“Understanding the role of panoramic radiography in dental diagnostics: Q&A explained”

Question 2. Write various principles of panoramic radiography.
Answer.

• If the film moves at the speed, which follows the moving projection of a certain point, this point will always be projected on the same spot on film and will not appear unsharp.
• In OPG, the film is attached to a rotating system and moves in opposite direction to the beam. The fim is given correct speed by apposing this movement with contrary movement relative to the beam.

focal trough in OPG

“Importance of studying panoramic radiography principles for better imaging outcomes: Questions explained”

• During the exposure, the X-ray tube and the cassett carrier rotate around the patient in opposite direction and produce a section or an image layer which conforms to the shape of dental arches.
• Pivotal point or the axis around which X-ray tube and the cassett carrier rotate is known as rotational center.

OPG radiography

• Depending on manufacturer of X-ray machine, rotational center can be double, triple or moving.
• There is difference in the number and location of the rotational centers which influence the size as well as shape of focal trough.

“Common challenges in applying panoramic radiography principles effectively: FAQs provided”

• Focal trough is a three-dimensional curved zone which is designed in panoramic machine to accommodate patient’s jaw for structures to appear well defied on the resultant radiograph.