Final Study Guide Flashcards
In a radiograph, border of max sinus appears ____. and maxillary sinus lumen appears ____
Radiopaque; radiolucent
What does focusing cup do?
Negative charged- directs electrons
What type of radiograph will take an anterior posterior view?
Lateral-cephalometric
What is this?
PA cephalometric
cephalometric
Lateral cephalometric
What is the error in this blurry pano?
Too far back
What happens the most often?
Compton scatter
What causes the deleterious affect from radiation?
Hydrolysis of water
Correct statement of orbital shell?
L has a larger binding energy to M
Components that are associated with deterministic risk:
erythema and xerostomia
Components associated with stochastic risk:
Leukemia and cancer
Smaller voxel size will have ___ storage and ___ resolution
high & high
Smaller voxel size affect on radiation:
high (higher exposure)
Correct sequence of CBCT:
Basis image –> Projection image —> volumetric data set
What combo gives you the lowest radiation exposure?
CMOS rectangle, long distance
Smaller voxel yields:
high resolution, high radiation
What is affected by basis image data and the most important factor in CBCT:
Time
If you decrease mA, you:
decrease density
T/F: CCD compared to CMOS and PSP has lower radiation
true
When on sagittal view of CBCT it scrolls:
right to left
Factors that affect sharpness:
A: Source to object
B: Object to receptor
C: Focal spot size
D: Source to object, Object to receptor
E: all of the above
E- All of the above
Increasing magnification =
Long object-receptor distance
Lateral fossa is located by:
lateral incisors (maxilary) & canine
In a pano, the horizontal plan aligns with:
focal trough
