Welcome to your MRI - A Name [MRI images that are based on the differences in the transverse relaxation characteristics of tissues are known as ______.] TI weighted images T2 weighted images Proton density weighted images Spin density weighted images None . [At 1.5 tesla, to reduce chemical misregistration artifact, the TE should be a multiple of what time?] 3.1 ms 4.2 ms 6.6ms 7.3 ms None . [Which of the following is an advantage of gradient echo pulse sequences?] Decreased scan time Increased sensitivity to flow Volume acquisitions possible All of the above None . [During the acquisition of axial images of the body 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 . [The time between two successive 90 degree RF pulses is known as _______.] Echo time Repetition time Inversion time Relaxation time None . [Mutual induction between the RF transmitter and the RF receiver is known as _____.] Isolation Deisolation Coupling Decoupling None . [Which of the following is a method used in MRA to suppress stationary tissue?] Tissue subtraction Tissue saturation Gradient moment nulling Both A and B None . [The QRS wave of the ECG represents which phase of the cardiac cycle?] Atrial systole Ventricular systole Ventricular diastole Atrial diastole None . [The first use of a paramagnetic agent on a human subject was in what year?] 1976 1981 1946 1973 None . [To exist, magnets must have two poles, therefore they are commonly called_______.] Vectors Dipoles Axis Both A and C None . [In a gradient echo pulse sequence, transverse magnetization that is leftover from a previous excitation pulse is known as ______. ] Residual transverse magnetization Magnetization transfer Chemical misregistration None of the above None . [At a field strength of 1.0 tesla, the approximate T1 relaxation time for spleen tissue is ______.] 360ms 380ms 400ms 480ms None . [Figure displays which type of relaxation curve?] T 1 relaxation curve Inversion recovery curve T2 relaxation curve T2* relaxation curve None Comment . [In conventional spin echo sequences, how many phase encoding steps must be selected to fill2561ines of K space?] 64 128 192 256 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 . [Which of the following pieces of equipment should be used and or available when sedating patients for an MRI examination?] PuIse oximeter Blood pressure monitor Crash cart All of the above None . [Coils used to correct imperfections in the magnetic field are known as _____.] RF coils Surface coils Gradient coils Shim coils None . [During peak systolic phase of the cardiac cycle, blood flow velocities are dependent upon what factor(s)?] Patient age Cardiac output Anatomical site All of the above None . [The image parameter that primarily affects T2 weighting is ______.] Echo time Inversion time Repetition time None of the above None . [The inversion recovery pulse sequence that is used to suppress fat in a T1 weighted image is known as ______.] FLAIR STIR SSFP FLASH None . Time's up
