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ARMRIT MRI Practice Exam 2026: Study Guide & Test Questions

HEAL100 Health Care — exam and revision material · Other

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Health Care exam material, 8 pages. Originally published on StudyMerit.

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8
Academic year
2025/2026
Language
English

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ARMRIT Practice Exam Students also studied Science Medicine Radiology Save armrit study guide - pdf file 194 terms lexyyleon Preview ARMRIT 240 terms juan_carlos_navarro7 Preview ARMRIT FIRST TRY QUESTIONS 168 terms arios1776 Preview ARRT M Teacher rho Practice questions for this set Learn 1 / 6 Study with Learn Combining a metal ion with a ligand reduces their tendency to bind to proteins, enzymes, or membranes. The degree to which they dissociate is a measure of their: The T2 process is also known as: Spin-Spin The tissue characteristic that provides more tissue contrast and pathological information is: T2 effects The basic process of MR signal generation contains two basic steps, they are: Stimulation & Relaxation Choose an answer 1 Viscosity 2 Efficacy 3 Toxicity 4 Specific Absorption Rate Don't know?

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Which statement is true of the relaxation process? Without the effects of T2* (star), T2 decay continues 3 multiple choice options Which type of MRI magnet requires cryogen to cool magnetic coils to 4 degrees Kelvin? Superconductive Tissues that are very efficient at spin-lattice interactions near the Larmor frequency, such as fatty tissues, should have Low T1 values and produces hyperintense signals Which type of electromagnetic coils are employed as a transmitter, receiver or both? Radio-frequency coils The process of relaxation begins when: B1 is turned off To symbolize the flow and area of a magnetic field, lines are used which are called: Field or flux Which molecule precesses closer to the Larmor frequency? Fat Which cryogenic material can produce temperature as low as 4 degrees Kelvin? Liquid helium Magnetism can be defined as the ability of certain substances to attract: Iron Cobalt Nickel 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: Precession In comparison to Computed Axial Tomography, a disadvantage of MRI is: Special and costly site planning & shielding 3 multiple choice options The tissue characteristic which depends more on the state (solid, liquid, gas) of a tissue than any other factor is: T2 effects The T1 process is also known as: Spin-Lattice To describe the uniformity of the MRI system's main magnetic field, the term employed is: Homogeneity The main magnetic field of MRI systems in clinical use must meet an acceptable specification of: 20-30 PPM PPM: parts-per-million A 90 degree radio-frequency pulse will alter the net magnetization vector. Another effect is: The hydrogen protons will have phase coherence

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Which type of electromagnetic coils produce smaller magnetic fields which allow spatial localization to be performed? Gradient coils The mechanism of T2 contrast enhancement agents is to: Decrease T2 relaxation time, therefore producing low signal 3 multiple choice options MRI systems require rooms that provide specific shielding requirements. These rooms are lined with what type of materials? Copper or galvanized steel when is the net magnetization vector at its maximum magnitude? At equilibrium The tissue characteristic that depends heavily on the relative content of fat molecules and free water is: T1 effects In the USA, the MRI system's main magnetic field and the vector that represents it is symbolized: Bo After a 90 degree radio-frequency pulse, the net magnetization vector begins to return to equilibrium. When the NMV is half-way between transverse and equilibrium, what are the magnitudes of the longitudinal component and the transverse component? Longitudinal component = greater than zero Transverse component = greater than zero Which type of electromagnetic coils can be found both inside and outside of the housing of the MRI magnet? Radio-frequency coils (body coils & main coil) During the relaxation process, the MR signal grows weaker. The single loss is known as: Free Induction Decay The FID is a damped oscillation at the resonance frequency recorded when the net magnetization is tipped into the transverse plane FID is elicited by a single RF pulse (e.g., 90 degrees). The FID decays with the time constant T2*. The decay of the NMR signal can be recovered by applying a second RF pulse, a 180-degree pulse Which type of MRI magnet requires a steady current of electricity in coils of conductor wrapped around an air or iron core? Resistive (air core)

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