ARRT PRINCIPLES OF MRI FINAL EXAM REVIEW

ARRT PRINCIPLES OF MRI FINAL EXAM REVIEW

COMPLETE ANSWERS 100% CORRECT (LATEST 2024 / 2025 )

• How can we correct for a Gibb's artifact?: Increase number of phase encodings or

decrease FOV

• Fat and water precess at different frequencies, causing a arti- fact.: chemical shift
• What can be done to the receiver bandwidth to compensate for chemical shift?: Increase

receiver bandwidth

• Artifacts from motion will appear in which direction?: Phase encoding direction
• Energy given to nuclei in adjacent slices due to spin lattice relaxation can cause adjacent

slices in an acquisition to have different image contrast. What type of artifact is this?: Cross Talk

• An artifact seen in a GRADIENT ECHO image that appears as black and white banding

on the edges of the FOV: Moire

• Diseases, such as Malaria, in which microorganisms are transferred via an insect are

classified as: vector borne

• A complication or illness caused by the treatment from a healthcare professional is

termed: latrogenic

• In a medical malpractice lawsuit, the must be able to prove medical

malpractice: plaintiff / patient

• During transport of the patient, the urinary collection bag should be placed: below the

bladder

• The stray magnetic field outside the bore of the magnet is termed: fringe field
• FDA revision in 2003 on RF absorption limits the absorption to for the head: 3 w/kg -

10 min

• Which of the following has been documented to cause muscle contractions, alterations in

vision and biochemistry of cells?: time varying magnetic fields

• What is the RF absorption limit for the whole body based off the 2003 FDA revision?: 4

w/kg - 15 min

• When a sudden loss in temperature occurs which causes the coils to no longer be

superconducting, resulting in helium escaping from the cryogenic bath is termed:: a quench

• Force of an object in a magnetic environment depends on the following:: -

mass of the object, strength of the magnet, ferromagnetic properties of the object 1 / 2

17. The medial and lateral rectus muscles are located where?: The eye

• The first major branch of the abdominal aorta is the:: celiac trunk

19. The largest ventricle in the heart: left ventricle

• In what plane would a tear of the collateral ligaments of the knee be best evaluated?:

coronal

• The valve lies between the left atrium and left ventricle: bicuspid / mitral

22. Which fissure divides the frontal lobe from the temporal lobes?: Sylvian

• The common carotid bifurcates into the internal and external carotid artery at the level of

: C3 / C4

• What three branches come off the aorta?: brachiocephalic, left subclavian, left carotid

25. Which veins transport oxygenated blood?: pulmonary

26. Which valve lies between the right atrium and right ventricle?: tricuspid

• Water has a T1 relaxation time and a T2 relaxation

time: -

long / long

• The transmit bandwidth of the RF pulse effects:: spatial resolution, SNR, slice thickness
• The process the digitizes the MR signal is known as:: Fourier / Fast Fourier
• Reducing the TE results in images with what change in contrast?: de- creased T2

information

31. The phase encoding step is performed prior to the step:

frequen- cy encoding

32. What element in the body is the principle nucleus used in MR?: hydrogen

• In a super conducting magnet, the magnetic field strength is increased by increasing the: #

of turns in the wires

• Which parameter adjustments would shorten scan time?: Decrease TR Increase echo train

length Decrease NEX

35. Reducing the FOV will result in: decreased SNR

36. How can thin slices be selected?: Steep slice gradient narrow bandwidth

• All the following result in increased SNR: Parameter adjustments that in- crease SNR are:

Increase TR

• / 2