MDS PREP
Using "B" film, exposure is 1 R. What is the exposure when "D" film is used
1) 1 R
2) 1/2 R
3) 1/4 R
4) 1/8 R
Radiology
Answer: 3
80 kVp and 15 mA and source film distance of 8 inches exposure time for a film is 1/2 second. Keeping the kilovoltage and miliamperage constant exposure time at 16 inches
1. 1/2 second
2. 1 second
3. 2 second
4. 4 second
Radiology
Answer: 3
What is the function of filtration process while taking radiographs?
1. Remove the short wavelength photons
2. Remove the portion of long wavelength photons
3. To increase the radiation dose to patient
4. None of the above
The Compton effect is seen when
1. X-rays strike on film
2. X-rays strike on skin
3. X-rays interact with matter
4. X-rays interact with emulsion coating on film
Radiology
Answer: 3
A thin radioopaque line running around the curvature of root in IOPA is
1) Lamina dura
2) Lamina propria
3) Lamina limitans
4) Lamina densa
Radiology
Answer: 1
The residual biologic damage tha remains following an exposure to radiation is called
1) Direct effect
2) Indirect effect
3) Cumulative effect
4) Tolerance
Radiology
Answer: 3
Minimum percentage of cortical bone loss that should occur to be demonstrable in radiographic
1. 6.6 %
2. 13 %
3. 20 %
4. 30-40 %