practice test 1 armrit exam questions
with correct answers
different tissues that have signals that appear similar on a mr image are
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described as: - CORRECT ANSWER✔✔-isointense
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In a large main magnetic field such as those employed in MRI, the
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motion of a hydrogen proton has been described as wobbling like a
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spinning top. This motion is called: - CORRECT ANSWER✔✔-Prescession
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Magnetic resonance imaging is derived from the process known as: -
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CORRECT ANSWER✔✔-Nuclear magnetic resonance
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Once the net magnetization vector (nmv) has moved away from
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equilibrium, the following will occur: - CORRECT ANSWER✔✔-The
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transverse component will increase | | |
In MRI, substances respond to a specific radio frequency which is known
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|as: - CORRECT ANSWER✔✔-Resonance Frequency
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The introduction of gadolinum based contrast enhancement agents by
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intra-venous injection can involve passing through as abnormal blood
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, brain barrier. The tissue compartments involved are the: - CORRECT
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ANSWER✔✔-intravascular to interstitial | |
T2 is the measurement of time for the transverse compnent of the nmv
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to decrease what percentage of its maximum value after application of a
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90* radio-frequency pluse? - CORRECT ANSWER✔✔-37%
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In the USA the MRI systems main magnet field and the vector that
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represents it is symbolized - CORRECT ANSWER✔✔-B0 | | | | | |
the resonance frequency of any substance in a magnetic field can be
| | | | | | | | | | | |
calculated by employing the - CORRECT ANSWER✔✔-Larmor equation
| | | | | | |
in a pulse sequence transmitting a initial 90-degree radio frequency
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pulse will cause the nmv to: - CORRECT ANSWER✔✔-shift in both size
| | | | | | | | | | | |
and direction |
which type of electromagnetic coils are designed to stimulate and
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detect an MRI signal - CORRECT ANSWER✔✔-radio frequency coils
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tissues that are less efficient at spin-spin interactions because they
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contain more free water such as cerebral spinal fluid should have -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-High T2 values and produce hyper-intense
| | | | | | |
signals
with correct answers
different tissues that have signals that appear similar on a mr image are
| | | | | | | | | | | | |
described as: - CORRECT ANSWER✔✔-isointense
| | | |
In a large main magnetic field such as those employed in MRI, the
| | | | | | | | | | | | |
motion of a hydrogen proton has been described as wobbling like a
| | | | | | | | | | | |
spinning top. This motion is called: - CORRECT ANSWER✔✔-Prescession
| | | | | | | |
Magnetic resonance imaging is derived from the process known as: -
| | | | | | | | | | |
CORRECT ANSWER✔✔-Nuclear magnetic resonance
| | |
Once the net magnetization vector (nmv) has moved away from
| | | | | | | | | |
equilibrium, the following will occur: - CORRECT ANSWER✔✔-The
| | | | | | | |
transverse component will increase | | |
In MRI, substances respond to a specific radio frequency which is known
| | | | | | | | | | |
|as: - CORRECT ANSWER✔✔-Resonance Frequency
| | | |
The introduction of gadolinum based contrast enhancement agents by
| | | | | | | | |
intra-venous injection can involve passing through as abnormal blood
| | | | | | | | |
, brain barrier. The tissue compartments involved are the: - CORRECT
| | | | | | | | | |
ANSWER✔✔-intravascular to interstitial | |
T2 is the measurement of time for the transverse compnent of the nmv
| | | | | | | | | | | | |
to decrease what percentage of its maximum value after application of a
| | | | | | | | | | |
90* radio-frequency pluse? - CORRECT ANSWER✔✔-37%
| | | | | |
In the USA the MRI systems main magnet field and the vector that
| | | | | | | | | | | | |
represents it is symbolized - CORRECT ANSWER✔✔-B0 | | | | | |
the resonance frequency of any substance in a magnetic field can be
| | | | | | | | | | | |
calculated by employing the - CORRECT ANSWER✔✔-Larmor equation
| | | | | | |
in a pulse sequence transmitting a initial 90-degree radio frequency
| | | | | | | | | |
pulse will cause the nmv to: - CORRECT ANSWER✔✔-shift in both size
| | | | | | | | | | | |
and direction |
which type of electromagnetic coils are designed to stimulate and
| | | | | | | | | |
detect an MRI signal - CORRECT ANSWER✔✔-radio frequency coils
| | | | | | | |
tissues that are less efficient at spin-spin interactions because they
| | | | | | | | | |
contain more free water such as cerebral spinal fluid should have -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-High T2 values and produce hyper-intense
| | | | | | |
signals
