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[Meer zien]For the following spin-echo protocol: 
FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 
Decreasing TE will: 
a. Decrease the # of allowable slices. 
b. Increase the # of allowable slices. 
c. Increase scan time. 
d. Decrease scan time. - Answer-b. Increase the #...
Voorbeeld 2 van de 7 pagina's
In winkelwagenFor the following spin-echo protocol: 
FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 
Decreasing TE will: 
a. Decrease the # of allowable slices. 
b. Increase the # of allowable slices. 
c. Increase scan time. 
d. Decrease scan time. - Answer-b. Increase the #...
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...
Voorbeeld 1 van de 3 pagina's
In winkelwagenThe 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...
Voorbeeld 1 van de 3 pagina's
In winkelwagenThe 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...
Voorbeeld 3 van de 23 pagina's
In winkelwagenOn 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? ...
Voorbeeld 2 van de 14 pagina's
In winkelwagenA 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...
Voorbeeld 2 van de 15 pagina's
In winkelwagenElectromagnetic 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...
Voorbeeld 2 van de 7 pagina's
In winkelwagenal - 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...
Voorbeeld 3 van de 21 pagina's
In winkelwagenATOMS - 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 
...
Voorbeeld 1 van de 3 pagina's
In winkelwagendifferent 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...
Voorbeeld 3 van de 16 pagina's
In winkelwagenThe 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...
Voorbeeld 1 van de 3 pagina's
In winkelwagenMagnetism 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...
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