Chapter 3 Assignment Flashcards

1
Q

A high SNR will produce what type of spatial resolution on an image?

a.) high
b.) low

A

a.) high

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A large matrix will offer what type of spatial resolution?

a.) greater
b.) less

A

a.) greater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

If an imaging system operated with a DQE of 1, patient dose may potentially be:

a.) increased
b.) reduced

A

b.) reduced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

If the bit depth of a magnetic resonance imaging scanner is 14 bits, how many gray shades can be present in the image?

a.) 2048
b.) 4096
c.) 8192
d.) 16384

A

d.) 16384

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What unit is spatial resolution measured in?

A

lp/mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which of the following describes the type of contrast that is caused by variations in the tissue density within the anatomic part to be imaged?

a.) image contrast
b.) inherent contrast
c.) subject contrast
d.) none of the answers are correct

A

c.) subject contrast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The window level setting in a digital imaging system is used to manupulate which of the following values?

a.) temporal resolution
b.) image brightness
c.) image contrast
d.) spatial resolution

A

b.) image brightness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The window width setting in a digital imaging system is used to manipulate which of the following values?

a.) image brightness
b.) temporal resolution
c.) image contrast
d.) spatial resolution

A

c.) image contrast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which of the following does not affect patient dose during diagnostic radiography?

a.) inherent filtration
b.) added filtration
c.) source to image distance
d.) focal spot size

A

d.) focal spot size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which of the following is known as low contrast resolution?

a.) contrast resolution
b.) spatial resolution
c.) matrix resolution
d.) none of the above

A

a.) contrast resolution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

An artifact thats created by too few xray photons striking the IR is termed:

A

noise/quantam mottle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which of the following modalities generally displays the greatest spatial resolution?

a.) computed radiography
b.) nuclear medicine
c.) digital radiography
d.) digital mammography

A

d.) digital mammography

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which of the following terms best describes the ability of an imaging system to create seperate images of closely spaced high contrast objects?

a.) spatial resolution
b.) contrast resolution
c.) screen speed
d.) quantam mottle

A

a.) spatial resolution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which of the following best describes the ability of an imaging system to tell structures with similar thickness or density apart?

a.) spatial resolution
b.) contrast resolution
c.) temporal resolution
d.) inherent resolution

A

b.) contrast resolution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following is known as high contrast resolution?

a.) spatial resolition
b.) contrast resolution
c.) temporal resolution
d.) inherent resolution

A

a.) spatial resolution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which of the following is known as low contrast resolution?

a.) contrast resolution
b.) spatial resolution
c.) matrix resolution
d.) none of the above

A

a.) contrast resolution

17
Q

This type of contrast is dependent on what the system is capable of (film screen, digital, etc…)

a.) contrast resolution
b.) image contrast
c.) inherent contrast
d.) subject contrast

A

c.) inherent contrast

18
Q

Which term describes the range of exposure over which a detector can acquire data?

a.) LUT
b.) dynamic range
c.) rescaling
d.) DQE

A

b.) dynamic range

19
Q

Which of the following is part of a systems software that adjust the image to the desired contrast?

a.) LUT
b.) dynamic range
c.) rescaling
d.) DQE

A

a.) LUT

20
Q

A patient scheduled for a left foot amputation accidentally receives a rhinectomy. This scenario is an example of:

a.) adverse event indicator
b.) sentinel event indicator
c.) risk indicator
d.) an “I found it like that” indicator

A

b.) sentinel event indicator

21
Q

While performing a routine arthrogram a surgeon accidentally perforates a vessel. This scenario is an example of what:

a.) adverse event indicator
b.) sentinel event indicator
c.) risk indicator
d.) an I found it like that indicator

A

a.) adverse event indicator

22
Q

A patient recieved injected contrast media and had a severe reaction resulting in death.

a.) adverse event indicator
b.) sentinel event indicator
c.) risk indicator
d.) an i found it like that indicator

A

b.) sentinel event indicator

23
Q

While performing a routine l spine xray the tech gives the customary request blow all your breath out and hold but the patient mistakenly hears roll all the way on your stomach which results in the patient falling to the floor.

a.) adverse event indicator
b.) senteinel event indicator
c.) risk indicator
d.) an i found it like that indicator

A

a.) adverse event indicator

24
Q

A generator that produces 100% ripple is most efficent type of generator used in diagnostic imaging.

a.) true
b.) false

A

b.) false