Question 1

The ability of the MR system to differentiate between adjacent tissues having minimal differences in signal intensities is known as

Accepted Answer

A) signal-to-noise ratio. 
B) high-contrast resolution. 
C) low-contrast resolution. 
D) spatial linearity. 
A) signal-to-noise ratio. 
B) high-contrast resolution. 
C) low-contrast resolution. 
D) spatial linearity. C

Question 2

What is the resonant frequency in a unit with a 1.0-T magnet and a gyromagnetic ratio of 42.57 MHz/T?

Accepted Answer

A) 12.77 MHz 
B) 21.29 MHz 
C) 42.57 MHz 
D) 63.86 MHz 
A) 12.77 MHz 
B) 21.29 MHz 
C) 42.57 MHz 
D) 63.86 MHz C

Question 3

Nonuniformity in the magnetic field can be caused by

Accepted Answer

A) a homogenous main magnetic field. 
B) uniformity in the RF coil. 
C) the presence of ferromagnetic material within the bore of the magnet. 
D) all of the above. 
A) a homogenous main magnetic field. 
B) uniformity in the RF coil. 
C) the presence of ferromagnetic material within the bore of the magnet. 
D) all of the above. C

Question 4

What is the maximum luminance for soft-copy display devices as suggested by the ACR?

Accepted Answer

A) Less than 1.2 nit 
B) Greater than 50 nit 
C) Greater than 90 nit 
D) Less than 150 nit 
A) Less than 1.2 nit 
B) Greater than 50 nit 
C) Greater than 90 nit 
D) Less than 150 nit

Question 5

The ability of an MR scanner to resolve small objects is known as

Accepted Answer

A) signal-to-noise ratio. 
B) high-contrast resolution. 
C) spatial resolution. 
D) spatial linearity. 
A) signal-to-noise ratio. 
B) high-contrast resolution. 
C) spatial resolution. 
D) spatial linearity.

Question 6

The ACR slice position deviation in MR scanners should not exceed ____ mm.

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
A) 1 
B) 2 
C) 3 
D) 5

Question 7

The amount of geometric distortion in the image is the

Accepted Answer

A) signal-to-noise ratio. 
B) image uniformity. 
C) spatial resolution. 
D) spatial linearity. 
A) signal-to-noise ratio. 
B) image uniformity. 
C) spatial resolution. 
D) spatial linearity.

Question 8

An acquisition with a 200-mm field of view and 256 x and y encodes yields a pixel size of ____ mm².

Accepted Answer

A) 0.78 
B) 1.56 
C) 2.08 
D) none of the above 
A) 0.78 
B) 1.56 
C) 2.08 
D) none of the above

Question 9

Luminance uniformity of soft-copy displays used in MRI systems should be within ____ of the maximum brightness measured in the center of the screen.

Accepted Answer

A) 10% 
B) 20% 
C) 30% 
D) 50% 
A) 10% 
B) 20% 
C) 30% 
D) 50%

Question 10

A change in the strength of the main magnetic field can be caused by

Accepted Answer

A) cryogen boiloff. 
B) external ferromagnetic materials. 
C) shim coil failure. 
D) all of the above. 
A) cryogen boiloff. 
B) external ferromagnetic materials. 
C) shim coil failure. 
D) all of the above.

The ability of the MR system to differentiate between adjacent tissues having minimal differences in signal intensities is known as

What is the resonant frequency in a unit with a 1.0-T magnet and a gyromagnetic ratio of 42.57 MHz/T?

Nonuniformity in the magnetic field can be caused by

What is the maximum luminance for soft-copy display devices as suggested by the ACR?

The ability of an MR scanner to resolve small objects is known as

The ACR slice position deviation in MR scanners should not exceed ____ mm.

The amount of geometric distortion in the image is the

An acquisition with a 200-mm field of view and 256 x and y encodes yields a pixel size of ____ mm².

Luminance uniformity of soft-copy displays used in MRI systems should be within ____ of the maximum brightness measured in the center of the screen.

A change in the strength of the main magnetic field can be caused by

Introduction to Quality Management

Quality Management Tools and Procedures

Filmscreen Image Receptors, Darkrooms, and Viewing Conditions

Film Processing

Processor Quality Control

Silver Recovery

Quality Control of X-Ray Generators and Ancillary Radiographic Equipment

Quality Control of Fluoroscopic Equipment

Digital and Advanced Imaging Equipment

Outcomes Assessment of Radiographic Images

Mammographic Quality Standards

Quality Control in Computed Tomography

Ultrasound Equipment Quality Assurance

Quality Assurance in Nuclear Medicine

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Exam 13: Quality Control for Magnetic Resonance Imaging Equipment

The ability of the MR system to differentiate between adjacent tissues having minimal differences in signal intensities is known as

What is the resonant frequency in a unit with a 1.0-T magnet and a gyromagnetic ratio of 42.57 MHz/T?

Nonuniformity in the magnetic field can be caused by

What is the maximum luminance for soft-copy display devices as suggested by the ACR?

The ability of an MR scanner to resolve small objects is known as

The ACR slice position deviation in MR scanners should not exceed ____ mm.

The amount of geometric distortion in the image is the

An acquisition with a 200-mm field of view and 256 x and y encodes yields a pixel size of ____ mm².

Luminance uniformity of soft-copy displays used in MRI systems should be within ____ of the maximum brightness measured in the center of the screen.

A change in the strength of the main magnetic field can be caused by

Introduction to Quality Management

Quality Management Tools and Procedures

Filmscreen Image Receptors, Darkrooms, and Viewing Conditions

Film Processing

Processor Quality Control

Silver Recovery

Quality Control of X-Ray Generators and Ancillary Radiographic Equipment

Quality Control of Fluoroscopic Equipment

Digital and Advanced Imaging Equipment

Outcomes Assessment of Radiographic Images

Mammographic Quality Standards

Quality Control in Computed Tomography

Ultrasound Equipment Quality Assurance

Quality Assurance in Nuclear Medicine

Filters