10 Panoramic principles and theory

Question 1

panoramic anatomic accuracy

Answer 1

the relationship between unit’s imaging layer and patient positioning

Question 2

linear tomography

Answer 2

the source and the film move in a straight line in opposite directions at a constant speed around a stationary patient, everything between source and film will be in the image but only a small distance will be focused

Question 3

panoramic radiography

Answer 3

modification of linear tomography, source and film rotate using a narrow beam to an image of a curved layer

Question 4

focal trough

Answer 4

9-11mm wide, corresponds to the location of the teeth in 95% of population

Question 5

real image

Answer 5

formed when the object is between center of rotation of beam and film

Question 6

ghost image

Answer 6

formed when the object is between the source and the center of rotation of beam, appear contralateral, superior, blurred and magnified

Question 7

light lines

Answer 7

incorporated in some units to help position patients