Question 1

Slices of anatomy that are reformatted to go from side to side are

Accepted Answer

A) coronal 
B) sagittal 
C) axial 
A) coronal 
B) sagittal 
C) axial

Question 2

To visualize tissues that are very similar to each other,the

Accepted Answer

A) WW should be narrow 
B) WW should be wide 
C) WL should be low 
D) WL should be high 
A) WW should be narrow 
B) WW should be wide 
C) WL should be low 
D) WL should be high

Question 3

The collimator found between the patient and the detectors is the

Accepted Answer

A) prepatient collimator 
B) postpatient collimator 
C) bowtie filter 
D) A and B 
A) prepatient collimator 
B) postpatient collimator 
C) bowtie filter 
D) A and B

Question 4

The small amount of tissue represented by a pixel is the

Accepted Answer

A) matrix 
B) pixel 
C) voxel 
D) voxel volume 
A) matrix 
B) pixel 
C) voxel 
D) voxel volume

Question 5

Each major development in beam and detector geometry is called a

Accepted Answer

A) generation 
B) gantry 
C) detector 
D) upgrade 
A) generation 
B) gantry 
C) detector 
D) upgrade

Question 6

As the WL changes,the CT image's

Accepted Answer

A) contrast changes 
B) brightness changes 
C) spatial resolution changes 
A) contrast changes 
B) brightness changes 
C) spatial resolution changes

Question 7

This is calculated by knowing the dimensions of the pixel and the slice thickness

Accepted Answer

A) Matrix 
B) Pixel 
C) Voxel 
D) Voxel volume 
A) Matrix 
B) Pixel 
C) Voxel 
D) Voxel volume

Question 8

Adding a printed comment or label to the image is

Accepted Answer

A) annotation 
B) windowing 
C) ROI 
D) MPR 
A) annotation 
B) windowing 
C) ROI 
D) MPR

Question 9

The dose report

Accepted Answer

A) displays the CTDIvol and DLP indices before and after the CT study is performed 
B) is sent to PACS with the rest of the patient's CT study 
C) is a federal requirement since 2002 
D) All of the above 
A) displays the CTDIvol and DLP indices before and after the CT study is performed 
B) is sent to PACS with the rest of the patient's CT study 
C) is a federal requirement since 2002 
D) All of the above

Question 10

Which of the following is correct concerning shielding in CT?

Accepted Answer

A) Shielding may have limited value because of very tight collimation and minimal scatter 
B) Conventional lead shielding of radiosensitive tissues such as gonads or thyroid can be done when they are located outside of the SFOV 
C) The shield must completely surround the patient because the tube travels in a circular motion 
D) All of the above 
A) Shielding may have limited value because of very tight collimation and minimal scatter 
B) Conventional lead shielding of radiosensitive tissues such as gonads or thyroid can be done when they are located outside of the SFOV 
C) The shield must completely surround the patient because the tube travels in a circular motion 
D) All of the above

Question 11

Longitudinal automatic tube current modulation is

Accepted Answer

A) in-plane 
B) through-plane 
C) automatically controls tube current along the X-Y axis 
D) automatically controls tube current along the Z axis 
E) A and C
F)B and D 
A) in-plane 
B) through-plane 
C) automatically controls tube current along the X-Y axis 
D) automatically controls tube current along the Z axis 
E) A and C
F)B and D

Question 12

Electron-beam computed tomography (EBCT)was developed to be fast enough to image the

Accepted Answer

A) lungs 
B) heart 
C) diaphragm 
D) skull 
A) lungs 
B) heart 
C) diaphragm 
D) skull

Question 13

The CT gantry is stationary and cannot be tilted.

Accepted Answer

A) True 
 B)False

Question 14

The DAS is located

Accepted Answer

A) just below the couch 
B) inside the x-ray tube 
C) within the gantry 
D) in the central processing unit 
A) just below the couch 
B) inside the x-ray tube 
C) within the gantry 
D) in the central processing unit

Question 15

The image data is the

Accepted Answer

A) linear attenuation coefficients 
B) matrix of CT numbers 
C) same as the raw data 
D) None of the above 
A) linear attenuation coefficients 
B) matrix of CT numbers 
C) same as the raw data 
D) None of the above

Question 16

With spiral CT imaging,the relationship between slice thickness and table travel during one tube rotation is the

Accepted Answer

A) protocol 
B) scan field of view (SFOV) 
C) display field of view (DFOV) 
D) pitch 
A) protocol 
B) scan field of view (SFOV) 
C) display field of view (DFOV) 
D) pitch

Question 17

The edge enhancement and smoothing filters change the visibility of noise and the spatial resolution.

Accepted Answer

A) True 
 B)False

Question 18

The WL should be set

Accepted Answer

A) at 0 
B) above 0 
C) below 0 
D) near the CT number of the anatomy to be visualized 
A) at 0 
B) above 0 
C) below 0 
D) near the CT number of the anatomy to be visualized

Question 19

Noise can be reduced by using a

Accepted Answer

A) lower pitch 
B) higher pitch 
C) shorter rotation time 
D) None of the above 
A) lower pitch 
B) higher pitch 
C) shorter rotation time 
D) None of the above

Question 20

Determining the CT numbers that will be visible in the image is

Accepted Answer

A) annotation 
B) windowing 
C) region of interest (ROI) 
D) multiplanar reformation (MPR) 
A) annotation 
B) windowing 
C) region of interest (ROI) 
D) multiplanar reformation (MPR)

Slices of anatomy that are reformatted to go from side to side are

To visualize tissues that are very similar to each other,the

The collimator found between the patient and the detectors is the

The small amount of tissue represented by a pixel is the

Each major development in beam and detector geometry is called a

As the WL changes,the CT image's

This is calculated by knowing the dimensions of the pixel and the slice thickness

Adding a printed comment or label to the image is

The dose report

Which of the following is correct concerning shielding in CT?

Longitudinal automatic tube current modulation is

Electron-beam computed tomography (EBCT)was developed to be fast enough to image the

The CT gantry is stationary and cannot be tilted.

The DAS is located

The image data is the

With spiral CT imaging,the relationship between slice thickness and table travel during one tube rotation is the

The edge enhancement and smoothing filters change the visibility of noise and the spatial resolution.

The WL should be set

Noise can be reduced by using a

Determining the CT numbers that will be visible in the image is

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

The X-Ray Circuit

The X-Ray Tube

X-Ray Production

X-Ray Interactions With Matter

Image Production

Image Quality and Characteristics

Radiographic Exposure Technique

Scatter Control

Image Receptors

Exposure Technique Selection

Image Intensified Fluoroscopy

Additional Equipment

Filters

Exam 16: Computed Tomography

Slices of anatomy that are reformatted to go from side to side are

To visualize tissues that are very similar to each other,the

The collimator found between the patient and the detectors is the

The small amount of tissue represented by a pixel is the

Each major development in beam and detector geometry is called a

As the WL changes,the CT image's

This is calculated by knowing the dimensions of the pixel and the slice thickness

Adding a printed comment or label to the image is

The dose report

Which of the following is correct concerning shielding in CT?

Longitudinal automatic tube current modulation is

Electron-beam computed tomography (EBCT)was developed to be fast enough to image the

The CT gantry is stationary and cannot be tilted.

The DAS is located

The image data is the

With spiral CT imaging,the relationship between slice thickness and table travel during one tube rotation is the

The edge enhancement and smoothing filters change the visibility of noise and the spatial resolution.

The WL should be set

Noise can be reduced by using a

Determining the CT numbers that will be visible in the image is

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

The X-Ray Circuit

The X-Ray Tube

X-Ray Production

X-Ray Interactions With Matter

Image Production

Image Quality and Characteristics

Radiographic Exposure Technique

Scatter Control

Image Receptors

Exposure Technique Selection

Image Intensified Fluoroscopy

Additional Equipment

Filters