Welcome to your MRI - A Name [The first oral MRI contrast agent used in a human subject was known as] Niobium-Titanium Ferric Chloride Ferric Nitrate Gadopentetate dimeglumine None . [Which of the following logical gradients is known as the phase encoding gradient?] X gradient Y gradient Z gradient None . [In clinical MRI, which of the following is an advantage of using a superconducting magnet?] High field strength Shorter scan times Low power consumption All of the above None . [Motion artifact on an MR image caused by flowing blood or CSF can be decreased by which of the following methods?] Respiratory compensation Patient education Gradient moment nulling Respiratory gating None . [The process of adjusting coils to improve the homogeneity of the external magnetic field is known as _____.] Strengthening Fringing Shielding Shimming None . [The series of 180 degree rephasing pulses in a fast spin echo pulse sequence is known as ______. ] Echo train Inversion train Echo plane None of the above None . [At a field strength of 1.0 tesla, the approximate Tl relaxation time for CSF is ______.] 800ms 1000 ms 2000 ms 2500 ms None . [During the acquisition of sagittal images with the phase direction A/P, frequency encoding is performed by which physical gradient?] X gradient Y gradient Z gradient None of the above None . [Which of the following TOF MRA sequences is most likely to saturate slow flow?] 3D TOF 2D TOF None . [Phase mismapping artifact caused by respiratory motion can be decreased by which method?] Presaturation pulse Swapping phase and frequency direction Respiratory compensation All of the above None . [Proper patient screening should include which of the following?] The elimination of any loose metal objects and personal items The identification of any possible contraindications The identification of any biomedical implants All of the above None . [At a field strength of 1.0 tesla, the approximate Tl relaxation time for renal medulla tissue is ______.] 520ms 600ms 680ms 800 ms None . [The method that is most commonly used to reduce artifact produced by cardiac motion when scanning the chest is known as ______.] Respiratory gating Respiratory compensation Cardiac gating None of the above None . [At a field strength of 1.0 tesla, the approximate T2 relaxation time for blood is ______.] 140ms 180 ms 240ms 300ms None . [In an echo planar pulse sequence, using a long TE produces what type of weighting?] Tl weighting T2 weighting Proton density weighting None of the above None . [When the number of excitations is decreased, acquisition time _______.] Increases Decreases Stays the same None . [The rule that is used to determine the direction of the magnetic field in an electromagnet is known as _____.] Ohm'sLaw Right hand thumb rule Left hand thumb rule None of the above None . [When slice spacing increases, signal to noise ratio _______.] Increases Decreases Stays the same None . [The direction of blood flow is an important factor in determining the effects of entry slice phenomenon.] True False None . [Which of the following is a contraindication for the use of gadolinium?] Patients with history of metastatic cancer Patients with history of asthma Patients with history of metal implants No known contraindications None . Time's up
