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practice test 1 ARMRIT Questions and Answers

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  • ARMRIT

practice test 1 ARMRIT

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  • August 17, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ARMRIT
  • ARMRIT
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practice test 1 ARMRIT


different tissues that have signals that appear similar on a mr image are described as: -
answerisointense

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: -
answerPrescession

Magnetic resonance imaging is derived from the process known as: - answerNuclear
magnetic resonance

Once the net magnetization vector (nmv) has moved away from equilibrium, the
following will occur: - answerThe transverse component will increase

In MRI, substances respond to a specific radio frequency which is known as: -
answerResonance 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: - answerintravascular 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?
- answer37%

In the USA the MRI systems main magnet field and the vector that represents it is
symbolized - answerB0

the resonance frequency of any substance in a magnetic field can be calculated by
employing the - answerLarmor equation

in a pulse sequence transmitting a initial 90-degree radio frequency pulse will cause the
nmv to: - answershift in both size and direction

which type of electromagnetic coils are designed to stimulate and detect an MRI signal -
answerradio frequency coils

tissues that are less efficient at spin-spin interactions because they contain more free
water such as cerebral spinal fluid should have - answerHigh T2 values and produce
hyper-intense signals

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