General 2.3 Flashcards
What are the components of a cathode? (FITB)
focusing cup
filament
What image processing modification was used on this radiograph?
automated image analysis: measurement ruler
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…
c. Only comprised 30% of diagnostic x-rays
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
b. Digitizes the x-ray signal faster
Question about the Line-focusing principle
a. The effective focal spot is ALWAYS smaller than the actual focal spot
Which of the following requires the use of chemical interactions to produce a radiographic image?
a. CMOS b. PSP
c. Film d. CCD
c. Film
Which of the following is used with PSP?
a. Laser scanners
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
c. Ability to modify image properties in a viewer
(Short answer) What system is utilized to make Digital modifications (1 point)? and list 2 specific examples (2 points).
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…
(Fill in the blank) What image modification was made to this radiograph?
edge enhancement
(Fill in the blank) Who was the 1st to produce dental radiographs?
Otto Walkoff
(Fill in the blank) What was the significance of Wilhelm Conrad von roetgen?
1st to discover X-radiation
Who modified the x-ray tube for portability?
William David Coolidge
According to the inverse square law, if we change from a 16” cone to an 8” cone, the intensity of the beam will be:
increased 4x the original intensity
question asking about the properties of an xray
-ionize matter
-have no charge
-and some other stuff
The atomic mass is equal to
a. Protons
b. Protons + neutrons
c. Protons + electrons
d. Neutrons
b. Protons + neutrons
How does the particulate radiation of alpha particles compare to those of photons?
a. Higher
b. Lower
c. Positive d. Negative
a. Higher
know the order of this
ID
radio waves
ID
microwaves
ID
visible light
ID
infrared radiation
ID
UV radiation
ID
xrays
ID
gamma rays
(Fill in the blank) What are 2 examples of Ionizing radiation?
xrays
gamma rays
Which of the following is required for CCDs?
Analog-to-digital conversion
What is the point of rectification?
Changing alternative current into direct current
The step down transformer is associated with what?
Low voltage, Cathode, heating the filament
What is true regarding density?
It is the amount of blackness in an image
Which has the best spacial resolution?
a. Film
b. CCD
c. PSP
d. CMOS
a. Film
A Cesium scintillator is used for what?
a. PSP sensor
b. Solid state sensors
b. Solid state sensors
Which sized solid-state sensors are primarily used?
We think it is size 1 and 2, but not sure. Not mentioned in the slides or in lecture
