American Registry of Magnetic Resonance Imaging Technologists (ARMRIT) Practice Test

These questions are part of the practice quiz. Start practicing

• Decreasing the field of view increases spatial resolution but decreases which of the following?
• What does combining a metal ion with a ligand indicate about their tendency to bind to proteins or membranes?
• Which technique can NOT help reduce artifacts caused by blood flow?
• Aliasing artifacts are caused by which of the following?
• What is the artery on the left side listed after the anterior tibial artery?
• What happens to the signal-to-noise ratio (SNR) when the field of view (FOV) is decreased?
• What effect does smaller slice thickness tend to have on SNR?
• What is the location of the first bottom term in the anatomical context described?
• In a detailed cardiac imaging view, which structure is located to the right of the descending aorta?
• What is a common occurrence when there is motion during an MRI scan?
• What is the limit of SAR for whole body exposure?
• What is the effect of a higher or longer echo train length (ETL) on scan time?
• What role does the papillary muscle play in cardiac anatomy?
• Which aspect does not improve with smaller voxel size?
• In MRI, spatial resolution is primarily defined by which characteristic?
• What is the first structure listed in the sequence of cardiovascular terms?
• What occurs to voxels when the number of phase encoding steps increases?
• As voxel size decreases, how is image quality affected?
• How does increasing the repetition time (TR) influence the SNR?
• Which artery is NOT mentioned in the sequence describing the pelvic and lower limb arteries?
• Which muscle is associated with the flexor hallucis in the right side anatomical description?
• Which imaging technique uses accelerated k-space filling to reduce scan time?
• What is the primary effect of increasing the number of frequency encoding steps?
• What is the significance of the azygos vein in cardiovascular anatomy?
• The complete elimination of all pathogens and microorganisms is referred to as which of the following terms?
• Which of the following field strengths has the highest inherent SNR?
• Cryogen levels in an MRI system should never fall below what percentage?
• What is the effect on SNR when the receiver bandwidth of a pulse sequence is reduced?
• What is the correct dosage of gadolinium-based contrast agent for a patient weighing 100lbs?
• Which term is part of the right side structures in the anatomy provided?
• Which approach is most effective at improving the signal-to-noise ratio in MRI?
• Which MRI sequence is most affected by the chemical shift artifact?
• What causes a corresponding increase in Partial Volume artifacts?
• Which structure correlates with the attachment of muscles involved in elbow flexion?
• What type of artifact is caused by anatomical motion during imaging?
• How can gradient coils best be described?
• Which of the following parameters has a direct effect on scanning times?
• What implication does a long inversion time have on T1 relaxation in MRI?
• What is the purpose of using a surface coil in MRI?
• How many pairs of gradient coils are utilized to provide spatial information within the MR signal?
• Which factor impacts the signal strength and patient safety in MRI?
• RF pulses are identified according to which of the following parameters?
• In anatomical diagrams, which structure is located at the bottom left position in ventricular imaging?
• Which characteristic does NOT affect voxel size in MRI?
• Which parameter is typically adjusted to enhance the contrast of MRI images?
• In MRI, what does SNR stand for?
• To increase spatial resolution without affecting scan time, and all other parameters remaining the same, an MRI technologist can do which of the following?
• What muscle is associated with the triceps brachii tendon according to the anatomical description?
• In MRI, which coil is responsible for transmitting the RF pulse to the patient's body?
• What does the posterior fat pad in the right side anatomical description indicate?
• What does increasing the field of view (FOV) affect in MRI imaging?
• Which structure is identified as the top right position in a cardiac imaging interpretation?
• What does gradient slew rate measure?
• Slice excitation pulses that excite protons in an adjacent slice causing artifactual contrast changes are known as?
• What do tissues with low (short) relaxation times demonstrate?
• How does changing the receiver bandwidth (rBw) affect SNR according to MRI principles?
• What effect does decreasing the FOV of a scan have on the SNR?
• The artifact known as cross-talk can be corrected by adjusting which parameter?
• What does the Specific Absorption Rate (SAR) measure in an MRI context?
• Large voxels produce a higher SNR than small voxels due to which of the following reasons?
• In a T2 weighted pulse sequence, how does the appearance of white matter compare to gray matter?
• Which structure is noted as the first bottom term related to the elbow?
• What is the significance of the olecranon of the ulna in the anatomical context?
• What is the effect on image quality if voxel size decreases?
• In the anatomical description, what does the term "scaphoid" refer to?
• How is the medial side characterized in the provided anatomical description?
• Why does a 3.0T magnet have inherently higher SNR than a 1.5T magnet?
• The dimension of a voxel used in acquisition to obtain matrix is also known as which of the following?
• What value of echo train length would theoretically produce the shortest scan time?
• What class of gadolinium-based contrast agents does the ACR indicate does not require obtaining a patient's eGFR?
• What is the immediate decay of the RF signal in the transverse plane after excitation referred to as?
• The receiver bandwidth is related to the slope of which gradient?
• Of the following anatomical structures, which is considered to be normally enhancing post gadolinium injection?
• What type of coils are RF receive only surface coils classified as?
• What artery is associated with the popliteal region?
• Increasing the number of phase encoding steps will produce an image with what characteristic?
• What effect does reducing receiver bandwidth have on SNR?
• What impact does increasing the matrix size have on imaging time?
• Which artifact is most prevalent during MRI scans?
• What anatomical component is associated with the distal radioulnar joint?
• Which of the following is NOT an advantage of using permanent magnets?
• In which direction is k-space typically filled?
• Which parameter can significantly affect the timing of a spin echo pulse sequence?
• How are spatial resolution and voxel size related?
• What factors are known to increase contrast to noise ratio (CNR)?
• How can motion artifacts be identified in images?
• Which artery is typically located below the internal iliac artery in descending order?
• How is homogeneity in the main magnetic field typically measured?
• Which of the following is most likely to cause zipper artifacts?
• Which factor does not contribute to an increase in Specific Absorption Rate (SAR) during a pulse sequence?
• What is the effect of increasing the matrix size on SNR, assuming other parameters are constant?
• What is the primary purpose of diffusion-weighted imaging (DWI)?
• Which methods can help reduce artifacts caused by blood flow?
• It is recommended that gloves and gowns be worn by MRI staff if a patient displays which of the following?
• In which direction do motion artifacts primarily appear?
• What happens to spatial resolution as slice thickness increases?
• MR Perfusion imaging primarily examines blood dynamics through which type of circulation?
• The inversion time in an inversion recovery pulse sequence is the time interval between what?
• Which MRI area is designated as a general public area?
• Which structure is identified as the ulnar styloid process?
• What is an alternative term for phase mismapping artifact?
• What is being examined if the image presented is of the heart?
• What is MR neurography primarily used to scan?
• Which type of resolution allows for distinguishing between two time points as separate and distinct?
• On a T1 weighted image, sub-acute hemorrhage will typically appear as what?
• Which anatomical structure is known to connect the right and left ventricles?
• What is the process of cooling the electromagnetic coil windings to the point of superconductivity and then inducing electric current called?
• What is the second structure listed in the ordered sequence of arterial terms?
• What is the primary characteristic of a permanent magnet MRI?
• What is the in-plane resolution calculated with a Matrix of 256 x 256 and Slice thickness of 2mm?
• Which artery is indicated as the lateral circumflex artery?
• Which tissue characteristic depends on the strength of the main magnetic field and temperature?
• For a standard pulse sequence, what is the correct order to switch on and off the gradients?
• Which of the following provides the greatest signal-to-noise ratio?
• Following the excitation pulse, how does the FID decay?
• At what stage of gestation can a pregnant patient safely undergo MRI according to the American College of Radiology?
• What is the effect on SNR when decreasing the matrix size in an MRI scan from 512 x 512 to 320 x 320?
• As slice thickness increases, which phenomenon occurs in MRI?
• What does a high flip angle during MRI scanning result in?
• How is spatial resolution defined in MRI?
• Which of the following best describes temporal resolution?
• How is voxel size affected by changing the FOV from 30cm x 30cm to 30cm x 20cm, keeping other parameters the same?
• What is the main risk associated with an uncontrolled magnet quench?
• What is another name for functional magnetic resonance imaging (fMRI)?
• Cardiac motion can be significantly reduced by which of the following techniques?
• Which of the following parameters would NOT increase SNR?
• In a permanent magnet design, how is the direction of the main magnetic field best described?
• What is the primary cause of thermal injuries in the MR suite?
• Which RF pulse is consistently absent in a gradient echo sequence?
• How does increasing the number of excitations (NEX) affect scan time?
• Which of the following effects is associated with higher receiver bandwidth in MRI?
• How does increasing slice thickness influence SNR?
• What is an example of a dipole?
• What is one major consequence of anatomical motion during MRI scanning?
• Which technique is most effective for reducing chemical shift artifacts?
• Which joint is described as fishtail-like in form and part of the radial support structure?
• What type of concern is Peripheral Nerve Stimulation categorized as in MRI?
• Which term refers to the anatomical structure at the bottom of the left side?
• What happens to voxel size when the field of view (FOV) is increased?
• What is the term for the extension of breast tissue into the axilla?
• What is the approximate Larmor precessional frequency of a hydrogen proton in a static magnetic field of 0.5T?
• Which term describes the difference in signal-to-noise ratio (SNR) between two adjacent areas?
• Which element has the highest ferromagnetic susceptibility?
• What are the arrows pointing to in the knee region?
• If the number of excitations (NEX) is doubled, what will happen to the signal-to-noise ratio (SNR) and scan time?
• What is the inferior vena cava's function as illustrated in cardiac imaging?
• When discussing image quality in MRI, what does voxel size influence?
• Which structure is found in the yellow circle?
• What happens to scan time as the field of view (FOV) increases while other parameters remain constant?
• Which of the following image parameters can affect scan time?
• The electromagnetic coil responsible for producing the strong magnetic field of a superconducting magnet is embedded in what material?
• In anatomical imaging, what structures are included from top to bottom in a specific image?
• How can susceptibility artifacts be minimized during MRI?
• What is the final structure mentioned in the sequence of palmar arteries?
• Which of the following sets of parameters will provide the highest SNR, if all other parameters remain the same?
• From the left to the right in the described structure, which term is NOT included in the listing?
• What anatomical structure is indicated by an arrow in a cardiac imaging study?
• Why does decreasing the field of view negatively affect SNR?
• As phase encoding steps increase, spatial resolution will increase due to which of the following?
• In MRI terminology, what does FID stand for?
• Which imaging application requires knowledge of temporal resolution?
• What is the primary objective of the MR receiver system?
• In a fast (turbo) spin echo pulse sequence, what follows the initial slice excitation pulse?
• Increasing the time of repetition (TR) results in which of the following effects on scan time?
• How is SNR affected by increasing the number of averages in an MRI scan?
• What does a higher bandwidth setting generally result in?
• What is the effect of increasing the number of frequency encoding steps on the SNR?
• What phenomenon occurs when there is overlap of slices in a multi-slice acquisition?
• What is a common consequence of high frequencies in RF pulses?
• How does increasing the number of frequency (read out) encoding steps affect the SNR?
• What structure is known to separate the left and right ventricles of the heart?
• Given the parameters TE: 120 msec, TR: 3000 sec, and a matrix of 192 x 320, what is the calculated voxel size?
• What is the significance of using gadolinium-based contrast agents in imaging?
• What structure is indicated by the arrow pointing to the elbow region?
• As magnetic field strength increases, what happens to the precessional frequency?
• Which tissue characteristic has only a 10-15% variation and does not significantly contribute to contrast resolution?
• Decreasing the FOV of a scan will have what effect on the SNR?
• At temperatures near absolute zero, superconducting magnet coils exhibit which type of resistance?
• What is the formula for calculating the scan time in a basic spin echo pulse sequence?
• What does temporal resolution refer to in MRI?
• What is the primary benefit of using a higher receiver bandwidth in MRI?
• Increasing NEX/NSA yields which of the following effects?
• Which term describes the bone found on the left side in the context of the medial cuneiform anatomy?
• What artery is located at the top center of the described sequence?
• What type of artifact occurs due to a patient moving during an MRI scan?
• As slice thickness increases, how does spatial resolution change?
• In a diffusion-weighted imaging (DWI) post-sequence, which parameter best differentiates normal tissue from abnormal tissue?
• Which of the following three parameters control the size of a voxel and image spatial resolution?
• In a DWI sequence, which factor will primarily distinguish between different types of brain tissue?
• Which parameter in a DWI pulse sequence best differentiates normal tissue from abnormal tissue?
• What factor does not improve SNR during MRI scans?
• Which of the following does not decrease SAR?
• What imaging modality is specially noted for evaluating blood flow in tissues?
• What advantage do phase array coils offer in MRI imaging?