MF RADIOLOGY

Question 1

Used to assess the potential for biochemical changes in specific tissues. “Energy absorbed in tissue.”
milliGrays

Answer 1

Absorbed dose

Question 2

Used to assess how much biological damage is expected from the absorbed dose. (Different types of radiation have different damaging properties)
“Impact radiation has on tissue”
milliseiverts

Answer 2

Equivalent dose

Question 3

Used to assess the potential for long term effects that might occur in the future. Tissue sensitivity/damage from radiation to exposed population RISK! Takes into account the tissue or organ weighting factor.
*milliseiverts *

Answer 3

Effective dose

Question 4

Dosimetry unit used by the international commission on radiological protection to estimate damage from radiation to the exposed population is called ________. Units?

Answer 4

Effective dose
milliseiverts

Question 5

Increased photons, radiation, and exposure

Answer 5

Smaller voxel (<0.4)
CBCT assess buccal bone thickness if correct voxel size

Question 6

Standard of care for CBCT except:
- Smallest possible field of view
- Smaller voxel size
- Smaller MA setting
- Shorter exposure time
- Risk is the same for all patients

Answer 6

Risk is the same for all patients - FALSE
- Radiation levels differ between patients
- Higher radiation is still a risk for some patients

Question 7

CBCT advantages

Answer 7

• Secured storage
• Improved data
• Lower operating cost
• Decreased exposure
• NOT higher resolution

Question 8

Imaging for Degenerative TMJ

Answer 8

CBCT (if not there…CT)

Question 9

Imaging for Condylar Hyperplasia

Answer 9

TC99 (most radiation)

Question 10

Imaging for Disc Perforation

Answer 10

Arthrography

Question 11

Imaging for Internal Derangement

Answer 11

MRI

Question 12

Digital vs Silver Halide

Answer 12

Digital better than silver halide: price difference (more expensive), less radiation, NOT better resolution

Question 13

X-ray filter is made of _______.

Answer 13

Aluminum

Question 14

Purpose of filter is to __________.

Answer 14

Remove lower energy x-rays

Question 15

High density vs low density

Answer 15

Black (high:dark), White (low:light)

Question 16

Contrast

Answer 16

Gray scale (high - less grays, low - more grays)

Question 17

What is the minimum total filtration required?

Answer 17

2.5mm of aluminum for 70kVp
1.5mm of aluminum if less than 70 kVp

Question 18

2x mA = ______ exposure time

Answer 18

1/2

Question 19

Increase kVp = ______ density = _______ contrast

Answer 19

• Increase
• Decrease

Question 20

Decrease kVp = ________ contrast

Answer 20

Increase (more distinct differentiation)

Question 21

________ side structures are ahead and below its counterparts and more magnified. When tracing use the ________ side teeth.

Answer 21

• Right
• Left