ARMRIT Exam Bundle Questions and Answers 100% Correct

The components of the Gyro-magnetic ratio are: - ANSWER-Magnetic moment to angular momentum Which type of electromagnetic coils produce smaller magnetic field which allow spatial localization to be performed? - ANSWER-Gradient coils Which type of MRI magnet requires cryogen to cool magnetic co...

An analogy for the decoding of the MR signal through Fourier Transform - ANSWER-Basilar membrane processing sound Logically each line of phase encoding data is combined to allow the FT to determine the position along the y-axis. The number of phase encoding steps determines - ANSWER-the number of...

Magnetic resonance imaging is derived from the process known as: - ANSWER-Nuclear magnetic resonance Once the net magnetization vector (nmv) has moved away from equilibrium, the following will occur: - ANSWER-The transverse component will increase In MRI, substances respond to a specific radio...

Without proper safety limits on the MR system exposure to the time-varying magnetic fields created by the rapid switching of the gradient could create a potential environment for: - ANSWER-Including electrical current in the patient's tissues Faraday's Law deals with induction of a current by a...

For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Increasing the FOV will: a. Increase SNR. b. Decrease SNR. c. Decrease Matrix. - ANSWER-a. Increase SNR A gradient is employed exposing the patient's body to a series ...

T1 is the measurement of time for the longitudinal component of the net magnetization vector to recover what percentage of its original value after the application of a 90 degree radio-frequency pulse? - ANSWER-63% Immediately after an initial 90 degree radio-frequency pulse is turned off, the hy...

The component Mxy is most associated with: - ANSWERTransverse to Bo; T2 relaxation; Transverse magnetization The resonance frequency of any substance in a magnetic field can be calculated by employing the: - ANSWERLarmor equation Once the patient's area of interest is placed in the main magne...

Spatial resolution is an image quality factor determined by ________ and ________. - ANSWER-Slice thickness and pixel size Inversion time, In an inversion recovery pulse sequence, is the time interval between the: - ANSWER-180 and 90 degree pulses A complicated equation for predicting the MR s...

in a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton has been described as wobbling like a spinning top. this motion is called A) precession B) resonance C) frequency D) angular momentum - ANSWER-precession magnetic resonance imaging is derived from th...

Orbital screening for suspected intraocular metallic bodies should be done prior to admitting patients and personnel into an MR system: - ANSWER-at or above 0.01 Tesla strength Patients with tattooed eyeliner and / or eye makeup containing ferrous pigment should be screened and advised of what po...

Proton - answer-a subatomic particle having a positvie charge identical in magnitude to the negative charge of an electron and, together with the neutron, a component of all atomic nuclei. The proton forms, by itslef, the nucleus of the hydrogen atom. The mass of a proton is approximately 1836 times...

Chemical pre saturation - ANSWER-Selectively apply 90 degree pulse at frequency of tissue to be saturated. Moves fat or HBO 90 degrees. 2nd puse wider bandwidth moves both fat and water 90 degrees. One will be saturated so will not be read. Saturating out normal anatomy, pathology is often seen more...