General 2.3

Question 1

What are the components of a cathode? (FITB)

Answer 1

focusing cup
filament

Question 2

What image processing modification was used on this radiograph?

Answer 2

automated image analysis: measurement ruler

Question 3

Select what is true of Characteristic radiation
a. It is the most common radiation produced
b. It is an electron to nucleus interaction
c. Only comprised 30% of diagnostic x-rays
d. Etc…

Answer 3

c. Only comprised 30% of diagnostic x-rays

Question 4

In comparison to CCD sensors, which of the following is the correct statement regarding CMOS sensors?
a. Utilizes less radiation to generate an image
b. Digitizes the x-ray signal faster
c. Requires a separate analog to voltage converter prior to digitization

Answer 4

b. Digitizes the x-ray signal faster

Question 5

Question about the Line-focusing principle

Answer 5

a. The effective focal spot is ALWAYS smaller than the actual focal spot

Question 6

Which of the following requires the use of chemical interactions to produce a radiographic image?
a. CMOS b. PSP
c. Film d. CCD

Answer 6

c. Film

Question 7

Which of the following is used with PSP?

Answer 7

a. Laser scanners

Question 8

Which of the following is an advantage of using a CMOS sensor?
a. Ese of sensor placement
b. Patient comfort
c. Ability to modify image properties in a viewer
d. Retrieval of images from laser scanner

Answer 8

c. Ability to modify image properties in a viewer

Question 9

(Short answer) What system is utilized to make Digital modifications (1 point)? and list 2 specific examples (2 points).

Answer 9

The system used is the MIPACs system
i. Edge enhancement
ii. Noise reduction
iii. brightness/contrast
iv. Inversion of gray scale
v. Magnification
vi. Emboss
vii. Etc…

Question 10

(Fill in the blank) What image modification was made to this radiograph?

Answer 10

edge enhancement

Question 11

(Fill in the blank) Who was the 1st to produce dental radiographs?

Answer 11

Otto Walkoff

Question 12

(Fill in the blank) What was the significance of Wilhelm Conrad von roetgen?

Answer 12

1st to discover X-radiation

Question 13

Who modified the x-ray tube for portability?

Answer 13

William David Coolidge

Question 14

According to the inverse square law, if we change from a 16” cone to an 8” cone, the intensity of the beam will be:

Answer 14

increased 4x the original intensity

Question 15

question asking about the properties of an xray

Answer 15

-ionize matter
-have no charge
-and some other stuff

Question 16

The atomic mass is equal to
a. Protons
b. Protons + neutrons
c. Protons + electrons
d. Neutrons

Answer 16

b. Protons + neutrons

Question 17

How does the particulate radiation of alpha particles compare to those of photons?
a. Higher
b. Lower
c. Positive d. Negative

Answer 17

a. Higher

Question 18

know the order of this

Question 19

ID

Answer 19

radio waves

Question 20

ID

Answer 20

microwaves

Question 21

ID

Answer 21

visible light

Question 22

ID

Answer 22

infrared radiation

Question 23

ID

Answer 23

UV radiation

Question 24

ID

Answer 24

xrays

Question 25

ID

Answer 25

gamma rays

Question 26

(Fill in the blank) What are 2 examples of Ionizing radiation?

Answer 26

xrays
gamma rays

Question 27

Which of the following is required for CCDs?

Answer 27

Analog-to-digital conversion

Question 28

What is the point of rectification?

Answer 28

Changing alternative current into direct current

Question 29

The step down transformer is associated with what?

Answer 29

Low voltage, Cathode, heating the filament

Question 30

What is true regarding density?

Answer 30

It is the amount of blackness in an image

Question 31

Which has the best spacial resolution?
a. Film
b. CCD
c. PSP
d. CMOS

Answer 31

a. Film

Question 32

A Cesium scintillator is used for what?
a. PSP sensor
b. Solid state sensors

Answer 32

b. Solid state sensors

Question 33

Which sized solid-state sensors are primarily used?

Answer 33

We think it is size 1 and 2, but not sure. Not mentioned in the slides or in lecture