questions

Question 1

hesitation to switch to digital

Answer 1

cost and image quality

Question 2

showed two lines place on tooth

Answer 2

multi-line ruler

Question 3

4. What did Wilhelm Von Roetengen do?

Answer 3

discovered x-radiation

Question 4

5. Name 2 positives of tungsten as a target metal

Answer 4

high melting point
high atomic number

Question 5

6. Who was the first person to utilize radiographs for teeth?

Answer 5

otto walkoff
(Dr. kelly first in US)

Question 6

7. Who was the person who made the x-ray portable?

Answer 6

coolidge

Question 7

8. Question that gave multiple options and asked about thermionic emission.

Answer 7

electrons boil off filament

Question 8

9. Does the x-ray have high or low LET compared to alpha waves?

Answer 8

a. Alpha waves are an example of particulate radiation (contain mass) – things with mass have a high LET. X-rays are low LET bc no mass, travel at the speed of light, and have no charge!!

Question 9

13. In comparison to CMOS with radiation, CCD has

Answer 9

less radiation

Question 10

atomic number measure?

Answer 10

protons

Question 11

list two sources of ionizing radiation

Answer 11

xray and gamma

Question 12

higher spatial resolution is found in

Answer 12

film- since better quality image

Question 13

17. Smaller focal spot ______ and bigger focal spot ______

Answer 13

better resolution

worse resolution

Question 14

benefits of CMOS

Answer 14

digital manupulation

Question 15

what does PSP use

Answer 15

laser lights

Question 16

metal found in film

Answer 16

Ag-silver

Question 17

21. What type of radiation occurs when the electron strikes the nucleus?

Answer 17

bremsstrahlung

Question 18

22. What does the insulating oil do and where is it located?

Answer 18

insulating oil dissipates heat and it is located in tubehead (NOT XRAY TUBE)

Question 19

23. What happens when you change from alternating current to direct current?

Answer 19

decrease exposure and radiation dose

Question 20

24. Short answer question: What is qualitative imaging and what are examples of it?

Answer 20

mathematical alteration of the pixels. [uses mathematical manipulations of image data. examples are gray scale, contrast and brightness

Question 21

short answer: what is analytical imaging and examples

Answer 21

measures lengths(ex:# of pixels for length, area and circumference) and pixel values(ex. bone, enamel, dentin)

Question 22

28. What is found in the cathode?

Answer 22

focusing cup and filament

Question 23

where are x-rays produced

Answer 23

at the tungsten target