Final Study Guide

Question 1

In a radiograph, border of max sinus appears ____. and maxillary sinus lumen appears ____

Answer 1

Radiopaque; radiolucent

Question 2

What does focusing cup do?

Answer 2

Negative charged- directs electrons

Question 3

What type of radiograph will take an anterior posterior view?

Answer 3

Lateral-cephalometric

Question 4

What is this?

Answer 4

PA cephalometric

Question 5

cephalometric

Answer 5

Lateral cephalometric

Question 6

What is the error in this blurry pano?

Answer 6

Too far back

Question 7

What happens the most often?

Answer 7

Compton scatter

Question 8

What causes the deleterious affect from radiation?

Answer 8

Hydrolysis of water

Question 9

Correct statement of orbital shell?

Answer 9

L has a larger binding energy to M

Question 10

Components that are associated with deterministic risk:

Answer 10

erythema and xerostomia

Question 11

Components associated with stochastic risk:

Answer 11

Leukemia and cancer

Question 12

Smaller voxel size will have ___ storage and ___ resolution

Answer 12

high & high

Question 13

Smaller voxel size affect on radiation:

Answer 13

high (higher exposure)

Question 14

Correct sequence of CBCT:

Answer 14

Basis image –> Projection image —> volumetric data set

Question 15

What combo gives you the lowest radiation exposure?

Answer 15

CMOS rectangle, long distance

Question 16

Smaller voxel yields:

Answer 16

high resolution, high radiation

Question 17

What is affected by basis image data and the most important factor in CBCT:

Answer 17

Time

Question 18

If you decrease mA, you:

Answer 18

decrease density

Question 19

T/F: CCD compared to CMOS and PSP has lower radiation

Answer 19

true

Question 20

When on sagittal view of CBCT it scrolls:

Answer 20

right to left

Question 21

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

Answer 21

E- All of the above

Question 22

Increasing magnification =

Answer 22

Long object-receptor distance

Question 23

Lateral fossa is located by:

Answer 23

lateral incisors (maxilary) & canine

Question 24

In a pano, the horizontal plan aligns with:

Answer 24

focal trough