ARRT Magnetic Resonance Imaging (MRI) Registry Practice Test

These questions are part of the practice quiz. Start practicing

• The common carotid artery bifurcates into internal and external carotid arteries at which spinal level?
• What will occur when reducing the FOV (field of view) only?
• What is the result of reducing the number of lines filled in k-space?
• Which factor does NOT influence the characteristics of gradient echo sequences?
• If the TR in a gradient echo sequence is less than the T2 (or T2*), what is the resulting condition called?
• What ethical principle is implied by the statement "the goal is to do no harm" in healthcare practice?
• Which type of blood cell is responsible for phagocytosis?
• On a T2 weighted image, edema appears bright because it has a _________ relaxation time.
• In MRI, the phase encoding gradient is critical in determining:
• What technique is used to create additional images in various planes from a 3D data set?
• What would the scan time be in a 3D volume acquisition with TR 24 ms, TE 7 ms, Flip Angle 15°, FOV 20cm, 2mm slice thickness, 76 slices, 176 x 256 matrix, 1 NEX?
• In a contrast enhanced MR angiography of the abdominal arteries, the IV gadolinium would enhance in which order?
• What role does the echo time (TE) play in MRI imaging?
• The unit of measurement of the magnetic field surrounding the periphery of the MR scanner is expressed as:
• What does the final result of a perfusion study indicate?
• The source of infection where pathogens thrive in numbers sufficient to cause a threat is known as a:
• According to the 2003 FDA revision, what is the RF absorption limit for the head?
• What effect does reducing the TE have on image contrast?
• The energy used to form MRI images is ____________ the patient's tissues.
• The _________ is defined as the resonant frequency, and is equal to the product of the magnetic field and the gyromagnetic ratio.
• The gradient rise time is defined as?
• Which of the following best describes the concept of "spatial resolution" in MRI?
• The primary safety concern when operating an MRI system is:
• In order to acquire an intracranial arterial blood flow sequence, a presaturation pulse would be applied in which location?
• In magnetic resonance imaging, what is the purpose of a STIR sequence?
• Which field strength would require the shortest TI time to suppress the signal from fat in a STIR sequence?
• What is the typical effect of using parallel imaging in MR imaging?
• To increase the voxel volume, which parameters would be adjusted?
• In a superconducting magnet, the magnetic field strength is increased by increasing the:
• Which fissure divides the frontal and parietal lobes from the temporal lobes?
• Which four muscles and tendons are part of the rotator cuff in the shoulder?
• As the TE is increased:
• What step is performed prior to frequency encoding in MRI?
• Contrast in Diffusion Weighted Imaging (DWI) depends on:
• What type of isolation precautions should be used for HIV-positive patients in the MRI suite?
• What is a common factor that impacts the quality of MRI images?
• Another term used for "fever" is:
• In a gradient echo sequence, which option does NOT help yield high signal from fluid?
• Reducing echo time (TE) results in what sort of change to image contrast?
• Which MRI contrast agent is commonly used due to its paramagnetic properties?
• The first major branch of the abdominal aorta is the?
• Which of the following does NOT yield a higher signal-to-noise ratio?
• In a dual contrast spin echo sequence, what characteristic does the second echo image have compared to the first echo image?
• What is the name of the valve located between the left atrium and the left ventricle?
• A disadvantage of TOF MRA is high signal in some background tissues. To minimize signal from background tissues, TE should be selected that enables the signals from fat and water to be:
• Which anatomical structure is NOT part of the shoulder rotator cuff?
• The Ernst angle can be defined as the optimal ___________ that yields the ____________ signal for a particular spin in the least amount of time.
• What anatomical structure is predominantly visualized with T1-weighted images in MRI?
• If a patient has a heart rate of 70 beats per minute, what is the effective TR?
• What effect would using a steep slice select slope and/or narrow bandwidth have on slice thickness?
• What is the main purpose of shimming the magnet in MRI?
• How does fat behave in terms of T1 and T2 relaxation times?
• When imaging the female pelvis, which view is the most optimal for evaluation of the uterus?
• During which process is the readout gradient typically turned on along with the sampling or readout of the peak echo?
• Which of the following is NOT affected by changing the slice thickness?
• Which factor should be decreased to improve signal-to-noise ratio in MRI imaging?
• For magnetic resonance angiography, which type of sequence utilizes velocity-induced phase shifts for vascular signal?
• The medial and lateral rectus muscles can be found in which part of the body?
• What is the approximate difference in chemical shift measured in parts-per-million?
• What is the significance of using gadolinium in MRI?
• If the third ventricle is dilated, but the fourth ventricle is not, what pathology would be associated with?
• What type of surface coils are used with permanent magnets that have a vertical magnetic field?
• The process that digitizes the MR signals is known as:
• The HEIGHT of a peak on an MR spectrum correlates to the _________ of a substance that was detected.
• All of the following are examples of INTRINSIC contrast parameters in tissues EXCEPT:
• What type of flow does single order gradient moment nulling not compensate for?
• What happens to SNR when TR is increased?
• A magnetic vector is characterized by which two attributes?
• Which of the following parameters affects the contrast in a T1-weighted MRI image?
• Which imaging modality is known to provide the best detail for soft tissue resolution in the abdomen?
• To accurately produce an image based on differences in T1, the time interval between 90° excitation pulses should be:
• When is the optimal time to administer gadolinium-based contrast for enhancing MRI visibility?
• Which combination of flip angle and TR produces a T2 weighted gradient echo?
• Which of the following adjustments will shorten scan time in an MR pulse sequence?
• Which parameter combination will yield the best spatial resolution?
• Diseases like malaria that are transmitted via insects are classified as what type of infections?
• T2 weighted FLAIR sequences are typically used for the evaluation of which condition?
• To produce a high quality reformatted image, the:
• What is the main characteristic of inversion recovery imaging in MRI?
• What technique is utilized when a gradient echo sequence is selected for fast, breath hold dynamic contrast-enhanced imaging of the abdomen?
• What percentage of patients reportedly have allergic reactions to gadolinium contrast agents?
• In MRI, what does T1 relaxation primarily correlate with?
• Which adjustments reduce the overall signal-to-noise ratio (SNR) in an MR image?
• What does the gradient slew rate refer to?
• Which MRI sequence is most commonly recommended for evaluating white matter disease?
• Which imaging technique uses a very rapid pulse sequence during patient rest or activity?
• What protocol would be selected to rule out islet cell tumor?
• In an MRA sequence, how is signal removed from vessels?
• A remedy for a Gibbs truncation artifact would be?
• What parameter is primarily adjusted to control the amount of noise in MRI images?
• Which type of fields is documented to cause muscle contractions and visual light flashes?
• What is one of the main benefits of using a larger matrix in MRI?
• RF energy used in MRI is classified as what type of radiation?
• What type of sequences relies on flow-related enhancement to visualize flowing blood?
• During dynamic enhanced imaging for vasculature or visceral structures, contrast is administered and k-space is filled with __________ to ensure that the contrast enhancement is well visualized.
• Which sequence uses T1 gradient echoes and suppresses signal from stationary tissues?
• When performing MRI to rule out brain tumors, which weighted images are typically acquired to evaluate lesion involvement after the injection of gadolinium?
• Active shielding can be defined as:
• Which of the following sequences is the most insensitive to magnetic field inhomogeneity?
• Which parameter adjustments will LENGTHEN scan time in an MR pulse sequence?
• When parallel imaging techniques are utilized, a low resolution __________ is acquired prior to the acquisition.
• A gradient echo sequence in which all the remaining residual transverse magnetization is removed prior to the next excitation pulse is known as:
• What is the smallest object that can be resolved in an image acquired with a 24cm FOV and a 272 x 272 matrix?
• If a 192 phase resolution is required, how many times must the TR be repeated for 1 NEX?
• When imaging a geriatric patient, which imaging parameter is typically adjusted in a PCA MRA sequence?
• An adverse reaction or complication caused by treatment from a healthcare professional is called:
• Which MRI system component is primarily responsible for magnetizing proton spins?
• In MRI, which view is considered most optimal for the evaluation of the ovaries in the female pelvis?
• Which imaging characteristic is maximized with increased TR?
• When imaging a hemorrhagic infarct in the brain, which pulse sequence would demonstrate the magnetic susceptibility effects better?
• The ligamentum flavum can be found in which part of the body?
• Which imaging plane is optimal for evaluating Arnold Chiari Malformation?
• What effect does increasing the number of phase encodings have on image resolution?
• As the TR is increased, which outcomes are expected?
• A narrow receiver bandwidth causes which of the following effects?
• For T1 weighted images, why is contrast enhancement used to rule out metastatic lesions of the spinal cord?
• In MRI, what does the term "echo time" (TE) refer to?
• If the flip angle is doubled, how much does RF deposition increase by?
• On T1 weighted images of the spine, how does cerebrospinal fluid (CSF) appear in relation to the spinal cord?
• In a Fast Spin Echo (FSE) sequence, how can blurring be reduced when T1 or PD weighted images are acquired?
• Reducing the field of view (FOV) by a factor of 2 will reduce the voxel volume by which factor?
• In a cross sectional view of the MR magnet design, which coils are closest to the patient?
• Hemangiomas in the liver are best visualized with which type of imaging?
• What is the primary purpose of using T1 weighted images in MRI for brain evaluations?
• Magnetic field inhomogeneity is expressed in:
• In a Fast Spin Echo (FSE) sequence with a long TE yielding T2 weighted images, how can scan time be reduced?
• What is a potential downside of reducing the slice thickness in MRI?
• Which MRI sequence is best for visualizing edema?
• What is the role of a steep slice selection gradient?
• Which of the following choices represents a disadvantage of increased RF pulse bandwidth?
• Dynamic enhanced MRA sequences of the mesenteric arteries are performed using:
• Which imaging technique is most commonly used to differentiate between various soft tissues in the brain?
• Which of the following adjustments helps to improve SNR in an MR image?
• Which of the following is NOT a type of fomite found in an MRI environment?
• For a patient with a heart rate of 90 beats/min and a trigger window of 15%, what is the available imaging time if the trigger delay is 80ms?
• When transferring patients, where should a urinary collection bag be placed?
• In which orientation can a tear of the collateral ligaments of the knee be best visualized?
• All of the following would aid in reducing scan time EXCEPT:
• If a patient weighs 176 lbs, what is the dosage of contrast (0.1mmol/kg) that should be administered?
• Magnetic susceptibility artifacts are most prominent with which type of sequences?
• When performing MRI, what term describes the time taken for protons to realign with the magnetic field after being disturbed?
• Which of these is a purpose of increasing the NEX in MRI scanning?
• Which of the following best describes an EPI sequence?
• Collecting the low frequency (high amplitude signal) data points in k-space at the start of the scan is known as?
• All of the following comprise the biliary tree EXCEPT?
• Short TAU inversion recovery (STIR) sequences are utilized for evaluating all except which of the following?
• What is a major advantage of using a 2D time of flight sequence in MRI?
• What is the most common rate of oxygen administration in an emergency situation?
• The inversion time (TI) selected to null the signal from a specific tissue should be what percentage of the T1 relaxation time of that tissue?
• Water has a __________ T1 relaxation time and a ________ T2 relaxation time.
• Reducing the flip angle yields images with what change in image contrast?
• What is the primary purpose of a spoiler gradient pulse in MRI?
• Which sequence is best described as a 180° pulse followed by a 90°/180° combination?
• Calculate the voxel volume for the following pulse sequence: TR 2000, TE 85, FOV 24cm, Matrix 272 x 320, 3mm slice thickness, 3 NSA.
• In phase contrast MRA, the signal intensity within the vessel is dependent on what factor?
• The extent to which a material or tissue becomes magnetized in an external magnetic field is called?
• Which material could be used to line the walls and/or floors of the MR magnet room to reduce the fringe field, and is defined as __________ shielding?
• To generate thin slices, which equipment is required?
• In the TMJ's, the articular disc lies between what two anatomical structures?
• How do chemical fat suppression techniques operate?
• What pixel size results from a 3D acquisition using a 260mm FOV and a 320 x 320 matrix?
• Which MRI system component is responsible for producing the B1 magnetic field?
• The final result in a spectroscopy study is:
• What effect does reducing the Phase Matrix have on SNR in an image?
• The slice thickness in MRI can significantly affect which of the following?
• All of the following artifacts except ________ occur along the phase encoding axis.
• What happens to the signal-to-noise ratio (SNR) when the number of phase encodings is increased from 256 to 512?
• Which sequence is typically used for imaging brain tumors due to its high sensitivity to water content?
• Choose the correct slice thickness to create an isotropic voxel for the following: TR 2000, TE 90, Matrix 272 x 272, FOV 24cm.
• A technique utilized to reduce the MRI scan time which requires the use of an array coil is:
• CSF suppression in MRI is performed with which type of technique?
• What is the optimal imaging plane to visualize a TFCC tear?
• The MRI system component that provides the ability to perform spatial encoding is the:
• What happens to SNR when increasing the flip angle in MRI up to the Ernst angle?
• What does the term "B0" refer to in MRI imaging?
• In a medical malpractice lawsuit, who has the burden of proof for medical malpractice?
• Calculate the pixel area for the following sequence: TR 4000, TE 120, FOV 36cm, 408 x 512 matrix, 2 NEX, ETL 12.
• Individuals identified as "Level 2" personnel include:
• In a Fast Spin Echo sequence, the number of shots is calculated by:
• Which MRI sequence is particularly useful in identifying hemorrhage or acute traumatic lesions?
• According to MRI safety standards, "Level 1" personnel are defined as:
• The __________________ runs the length of the falx cerebri.
• In a fast spin echo sequence with a given set of parameters, what is the calculated scan time?
• What term describes the process where only half of the views of k-space are filled in the frequency axis?
• What is the term for the phenomenon that results in the increase in signal-to-noise ratio with increasing magnetic field strength?