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The factor which determines the calculated SAR average is: - Answer-The Patient weight in kilograms The maximum exposure to the head and trunk from the main magnetic field (Bo) is: - Answer-3T The force that can cause a ferromagnetic object such as an oxygen tank to become a projectile in the fri...

The T1 process is also known as: - Answer-Spin Lattice Which type of electromagnetic coils produce smaller magnetic field which allow spatial localization to be performed? - Answer-Gradient coils The component Mxy is most associated with: - Answer-Transverse to Bo; T2 relaxation; Transverse magn...

On T1-weighted pulse sequences the spinal cord will exhibit _______ signal intensity relative to the surrounding cerebral spinal fluid. - Answer-higher When employing a surface coil the signal intensity: - Answer-decreases as anatomy gets farther from the coil On T1-weighted images of the cervic...

A technique to avoid "cross-talk"? - Answer-Interleaving Combining a metal ion with ligand reduces tendency to bind to proteins, enzymes or membranes. The degree to which they dissociate is a measure of their? - Answer-Toxicity The "best" technique for improving image quality is to increase? ...

Electromagnetic energy is symbolized by a sine wave that has two components of measurements, they are: - Answer-Wavelength and frequency Of the following techniques which one is applied to prevent "crosstalk" between multi-slices with little or no interslice "gap" - Answer-Interleaving The a...

al - Answer-Current induced iby receiver coil. Also comes from the procession of protons in the patient. 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 de...

ATOMS - FUNDAMENTAL SUBMICROSCOPIC UNIT OF ALL MASS. SIZE OF THE ATOM AND ITS WEIGHT HAVE INTERESTED SCIENTISTS FOR A LONG PERIOD. SUBSEQUENTLY, EXPERIMENTS WERE DEVISED TO DETERMINE THE SIZE AND WEIGHT OF THE VARIOUS ATOMS. THE LIGHTEST OF ALL ATOMS IS HYDROGEN. PROTON - A SUBATOMIC PARTICLE HA...

different tissues that have signals that appear similar on a mr image are described as: - Answerisointense 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: - Answer-Prescession ...

The 2 types of enhancement media described by Lauffer, the mechanism of T1 agents is - Answer-to decrease T1 relaxation time, thus emitting high signal An analogy for the decoding of the MR signal through Fourier Transform - Answer-Basilar membrane processing sound Logically each line of phase e...

Magnetism can be defined as the ability of certain substances to attract: - Answer-Iron, Cobalt, Nickel 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 t...