rad 2 Flashcards
(44 cards)
what does PID stand for
position Indicating Device
what does XCP stand for
Extension cone paralleling
what does OFD stand for
object to film distance
what does TFD stand for
Target film distance
What does SID stand for
source image distance
what does AFD stand for
anode film distance
what does FFD stand
focal film distance
which acronyms are synonymous
TFD, SID, AFD, and FFD
TFD is most common though
what are rules for paralleling technique
Sensor placement, sensor position, Vertical angulation, horizontal angulation, and sensor exposure
T/F: the sensor should be placed parallel to long axis of tooth
true
T/F: the central ray of the X-ray beam is directed parallel to the sensor
false; the central ray should be perpendicular to the sensor ——ray—– lsensorl
what should be used to keep the film holder parallel with the long axis of the tooth
a sensor/film holder
what size sensor is used in the anterior region of adults
size 1
which size sensor is used in the posterior of adults and adolescence in a horizontal direcrtions
size 2
how can you ensure that only the most parallel rays will be directed at the tooth
increase the target-sensor(or film) distance
cone placement in an up and down direction
Vertical angulation
cone placement in a side to side direction
horizontal angulation
what is horizontal angulation especially important for
bitewing, keeping contacts open
what is the correct order of steps:
- film/sensor placement
- equipment preparation
- exposure sequence for film/ sensor placements
- patient preparation
4, 2, 3, 1
how should you prep the patient
- explain the procedure
- adjust chair
- adjust headrest
- place and secure the lead apron *
- remove all objects from mouth (i.e. lip or tongue ring)
how should you prep the equipment
- set exposure factors
- prepare sensor
- open sterilized package contains beam alignment device
should you start with anterior or posteriors first
anteriors
defined as the specific area where the film/sensor must be positioned before exposure; what is this dictated by?
film placement; teeth and surrounding structures (i.e. tori)
what can be used for paralleling technique when the pt has a shallow palate
cotton rolls: 2, one on each side of bite block
vertical angulation: can be increased by 5-15 degrees
