WorksheetsMRI - Reviewer 3
Total questions: 46
Worksheet time: 23mins
Name
Class
Date
1.
What is the bore of an MRI machine?
a)
A tube-like structure that houses components
b)
The outer casing of the MRI
c)
The cooling system of the MRI
d)
A part of the patient table
2.
What are the basic components of an MRI machine?
a)
Magnet, Coils, Computer
b)
X-ray Tube, Detector, Monitor
c)
Gamma Camera, Photomultiplier, Display
d)
Cathode Ray Tube, Film, Processor
3.
What is a major disadvantage of a closed MRI scanner?
a)
Can cause claustrophobia
b)
Lower image quality
c)
Limited scanning capabilities
d)
Uses ionizing radiation
4.
Which type of MRI scanner is open on all four sides?
a)
Open MRI Scanner
b)
Closed MRI Scanner
c)
High-Field MRI Scanner
d)
Mobile MRI Scanner
5.
What is a disadvantage of an open MRI scanner?
a)
Lower image quality
b)
Higher patient dose
c)
Increases claustrophobia
d)
Requires contrast for all scans
6.
What is the primary function of the MRI magnet?
a)
To create a stable magnetic field
b)
To produce X-rays
c)
To generate sound waves
d)
To capture images directly
7.
Which of the following is NOT a type of MRI magnet?
a)
Gamma magnet
b)
Permanent magnet
c)
Resistive magnet
d)
Superconducting magnet
8.
What is a primary advantage of a superconducting magnet?
a)
Produces a stable and strong magnetic field
b)
Uses no electricity
c)
Requires no cooling system
d)
Produces weak magnetic fields
9.
What is the function of gradient coils in an MRI?
a)
Produces variations in the magnetic field
b)
Detects patient movement
c)
Reduces noise in images
d)
Maintains room temperature
10.
Which gradient coil is responsible for slice selection?
a)
Z Coil
b)
X Coil
c)
Y Coil
d)
Surface Coil
11.
What is the function of the Y gradient coil?
a)
Phase encoding
b)
Frequency encoding
c)
Slice selection
d)
Noise reduction
12.
What is the role of the X gradient coil?
a)
Frequency encoding
b)
Phase encoding
c)
Image contrast adjustment
d)
Producing radiofrequency signals
13.
How do gradient coils contribute to image formation?
a)
They create different slices for imaging
b)
They improve the cooling system
c)
They enhance RF signal strength
d)
They protect the patient from radiation
14.
What is the purpose of shimming in MRI?
a)
To homogenize the magnetic field
b)
To cool the superconducting magnet
c)
To amplify the RF signal
d)
To increase gradient strength
15.
Which type of shimming uses loops of current-carrying wires?
a)
Active shimming
b)
Passive shimming
c)
Mechanical shimming
d)
Static shimming
16.
What type of shimming involves adding pieces of metal to the magnet?
a)
Passive shimming
b)
Active shimming
c)
Gradient shimming
d)
Superconducting shimming
17.
What is the function of RF coils in MRI?
a)
Transmit and receive signals
b)
Control magnet strength
c)
Maintain room temperature
d)
Increase scan speed
18.
How do RF coils work?
a)
They send and receive RF pulses
b)
They generate X-ray radiation
c)
They measure body temperature
d)
They amplify magnetic fields
19.
Which RF coil is used for whole-body imaging?
a)
Body coil
b)
Surface coil
c)
Head coil
d)
Gradient coil
20.
Which RF coil is specifically designed for brain imaging?
a)
Head coil
b)
Surface coil
c)
Shim coil
d)
Resistive coil
21.
What is the purpose of a surface coil in MRI?
a)
Provides high-resolution imaging for small body parts
b)
Scans the entire body
c)
Increases field homogeneity
d)
Produces contrast images
22.
What is the function of the MRI computer?
a)
Controls imaging parameters and processes data
b)
Generates the magnetic field
c)
Transmits radiation
d)
Reduces image contrast
23.
Which component of the MRI computer is responsible for transforming signals into images?
a)
Fourier transformer
b)
Magnet controller
c)
RF amplifier
d)
Shim processor
24.
What is the role of the signal converter in MRI?
a)
Converts received signals into digital images
b)
Cools the magnet
c)
Adjusts patient positioning
d)
Controls gradient coil activation
25.
Which component of the MRI system is responsible for amplifying weak signals?
a)
Preamplifier
b)
Magnet
c)
RF Coil
d)
Gradient Coil
26.
What is a major advantage of MRI over X-ray?
a)
Uses non-ionizing radiation
b)
Produces high radiation exposure
c)
Only works with contrast agents
d)
Requires a higher radiation dose
27.
Which tissue type is best visualized using MRI?
a)
Soft tissue
b)
Bone
c)
Air-filled cavities
d)
Metal implants
28.
What is an important application of MRI in pathology?
a)
Detecting blood circulation issues
b)
Measuring bone density
c)
Diagnosing fractures
d)
Viewing lung inflation
29.
Which of the following is an advantage of MRI?
a)
Produces detailed 3D images
b)
Uses ionizing radiation
c)
Requires radioactive tracers
d)
Limited to detecting fractures
30.
What is Magnetoencephalography (MEG) used for?
a)
Measuring brain activity
b)
Imaging soft tissues
c)
Detecting tumors
d)
Measuring blood pressure
31.
How does MEG work?
a)
Detects areas of brain activity
b)
Uses X-rays to scan the brain
c)
Measures blood oxygen levels
d)
Produces high-energy gamma rays
32.
What condition is commonly assessed using MEG?
a)
Epilepsy
b)
Osteoporosis
c)
Lung cancer
d)
Kidney stones
33.
What does functional MRI (fMRI) measure?
a)
Blood flow changes in the brain
b)
Bone mineral density
c)
Electrical conductivity in muscles
d)
Radiation absorption levels
34.
How does fMRI detect brain activity?
a)
It measures changes in blood flow
b)
It tracks movement of white blood cells
c)
It captures heat signatures
d)
It records electrical signals
35.
What process is observed in fMRI scans?
a)
Cerebral blood flow and neuronal activation
b)
Bone regeneration
c)
Muscle contractions
d)
Organ elasticity
36.
What happens when a brain region is active in fMRI?
a)
Blood flow increases to that area
b)
Blood flow decreases to that area
c)
Magnetic fields weaken
d)
The area emits radiation
37.
What is a major benefit of fMRI?
a)
Allows real-time imaging of brain function
b)
Uses low-dose X-rays
c)
Requires no patient movement
d)
Provides higher bone contrast
38.
Why is MRI preferred for brain imaging?
a)
It provides high soft tissue contrast
b)
It exposes the brain to high radiation
c)
It uses contrast agents in every scan
d)
It is the fastest imaging method
39.
How do MRI scanners produce images?
a)
By manipulating hydrogen protons with magnetic fields
b)
By emitting X-ray radiation
c)
By measuring temperature changes
d)
By detecting ultrasound waves
40.
What is a limitation of MRI?
a)
It takes longer to scan than X-ray
b)
It cannot differentiate soft tissues
c)
It is harmful due to ionizing radiation
d)
It produces lower resolution images than CT
41.
Which patients may have difficulty with MRI scans?
a)
Those with metal implants
b)
Those with fractures
c)
Those with viral infections
d)
Those with high blood sugar
42.
Open MRI scanners have lower image quality than closed MRI scanners.
a)
True
b)
False
43.
Functional MRI (fMRI) measures changes in electrical conductivity of tissues.
a)
False
b)
True
44.
RF coils are responsible for transmitting and receiving MRI signals.
a)
True
b)
False
45.
Active shimming uses metal plates to adjust the magnetic field.
a)
False
b)
True
46.
MRI uses ionizing radiation to create detailed images.
a)
False
b)
True
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