Radiology PPJ

Home > Preview

The flashcards below were created by user haitianwifey on FreezingBlue Flashcards.


  1. The paralleling technique is also known as
    • Extension Cone Paralleling (XCP) Technique
    • Right Angle Technique
    • Long Cone Technique
  2. What are the principles of the paralleling technique
    • Receptor placed parallel to long axis of tooth (must be in center of palate to achieve parallelism)
    • Central Ray is directed perpendicular to receptor and long axis of tooth
    • Beam alignment device must be used to maintain position (maintain parallelism)
  3. What are the advantages of the paralleling technique
    • Accuracy-provides image with minimal dimensional distortion
    • Simplicity-easy to learn, film holders and beam alignment devices eliminate need to determine vertical and horizontal angulation
    • Duplication-standardized technique that can be accurately duplicated
  4. The only advantage of bisecting over parallel method is
    shorter distance from tooth to receptor; thus less magnification
  5. To minimize magnification that occurs due to increased tooth to receptor distance , the _________ and This is accomplished by
    • distance between the source of x-rays and the receptor must be increased
    • Increasing PID length (“Long Cone”) OR: Increasing the distance of the target (source of xrays) within the tubehead
  6. Short PID=
    More divergent rays exposing a larger area than necessary
  7. Long PID=
    Less divergent rays (more parallel), exposing a smaller area
  8. _______ inch PID produces less magnification and increased definition
    16-inch
  9. Long axis of the tooth is an
    imaginary line that divides the tooth longitudinally into two equal halves
  10. What are the three principles of the paralleling technique
    • 1. Receptor is placed in the mouth parallel to the long axis of the tooth
    • 2. PID or CR (central ray) is directed perpendicular (at a right angle) to the film and to the long axis of the tooth
    • 3. Film holders must be used to keep the film parallel with the long axis of the tooth
  11. 29

Card Set Information

Author:
haitianwifey
ID:
329022
Filename:
Radiology PPJ
Updated:
2017-03-15 14:51:31
Tags:
Radiology PPJ
Folders:
Radiology
Description:
Radiology PPJ
Show Answers:

Home > Flashcards > Print Preview