Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CT Scan > Computed Tomography Scan Parameters > Flashcards

Computed Tomography Scan Parameters Flashcards

1
Q

is a set of user selectable factors that determines the resultant CT image, the scan length, orientation, image size, thickness and increment, noise etc.

A

Scan parameters

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

To change a specific scan parameter is also to change

A

the resultant images

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

This is the position of the patient relative to the gantry and the patient couch

A

SUPINE
PRONE
LEFT OR RIGHT LATERAL DECUBITUS

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

Where must the body part of interest be placed for CT scans

A

Isocenter

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

Are specific points in the body that will determine the scan area

A

Anatomical landmarks in CT

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

Anatomical landmark for Heat CT

A

glabella

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

Anatomical landmark for Neck CT

A

thyroid cartilage

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

Anatomical landmark for chest and neck CT

A

Sternal notch

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

Anatomical landmark for Abdominal CT

A

Xiphoid Process

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

the scanned projection radiograph, acquired by the CT system to allow the user to prescribe the start and end locations of the scan range

A

Scout image or the CT localizer radiograph

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

These images are not cross-sectional in nature; rather they are very similar to images acquired with conventional radiographic projection techniques

A

Scout Image

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

What does GE call scout imaging?

A

Scout

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

What does Philips call scout imaging?

A

Surview

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

What does Siemens call scout imaging?

A

Topogram

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

What does Toshiba call scout imaging?

A

Scanogram

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

What does Hitachi call scout imaging?

A

Scanogram

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Where is tube suspended during scout generation

A

above patient

18
Q

How is the tube positioned for Lat Scout?

A

90 degree angles to patient

19
Q

basically the length of the scan (hence the word scan length technologist sometimes refer to) measured in millimeters

A

Range

20
Q

This is planned on the scout image, also varies depending on the protocol selected and patient size

A

scan range

21
Q

Also called calibration field of view

A

Scan Field of View (SFOV)

22
Q

Diameter of the circular region within the scan plane over which projection data are collected

A

Scan Field of View

23
Q

It depends on the number of detectors activated to collect the data.

A

Scan Field of View

24
Q

How is scan field of view determined?

A

Number of detectors activated

25
Q

For best resolution, what is the best scan field of view size?

A

Smallest possible

26
Q

Directional coordinate systems have been called

A

RAS systems (Right-left, Anterior-posterior, Superior-inferior. )

27
Q

The body part included in the region of interest but outside the scan field of view will not have any data and not included in the scan

A

OUT OF FIELD artifact

28
Q

Determines how much raw data is used in displaying the acquired image

A

Display Field of View

29
Q

Display Field of View is also called

A

zoom or target

30
Q

Relationship of Display field of view with scan field of view

A

DFOV CAN BE EQUAL OR LESS OF SFOV

31
Q

Relationship of DFOV size and pixel, resolution and detail

A

Large DFOV, Large Pixels, = Low Spatial Resolution, Low visibility of detail

32
Q

Mode where the table stops at the scanning position and the tube rotates around the patient

A

Conventional/Axial/Regular Mode

33
Q

Patient continuously moving in the z-axis direction while the tube rotates around

A

Spiral/Helical

34
Q

Alternative name for reconstruction algorithms

A

Convolution kernels

35
Q

Various filters applied in filtered back projection reconstruction

A

Reconstruction Algorithm

36
Q

Various Types of Filter for soft tissue (abdomen , stonogram, muscles)
Head – for the brain
Bone – For osseous parts of the body
Detail – for body parts that requires high spatial resolution (eg. Neck)

A

Standard

37
Q

Various Types of Filter for the brain
Bone – For osseous parts of the body
Detail – for body parts that requires high spatial resolution (eg. Neck)

A

Head

38
Q

Various Types of Filter for osseous parts of the body

Detail – for body parts that requires high spatial resolution (eg. Neck)

A

Bone

39
Q

Various Types of Filter for body parts that requires high spatial resolution (eg. Neck)

A

Detail

40
Q

Depending on the examination, the gantry housing can be tilted.
This is mostly done in the axial scanning.
The range of tilt depends on the position of the organs to be scan on the scout image

A

Gantry Angle

41
Q

What does lower kV do to the resultant CT image

A

Lower kV

42
Q

What happens to kV as it is lowered and how it affects noise?

A

Lower kV=more noise

CT Scan (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions