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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 localizatio...
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 localizatio...
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Different tissues that have signals that appear similar on an MR image are described as: A) hypointense B) hyperintense C) isointense D) isodense - Answer isointense in a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton has been described as wobbling li...
Voorbeeld 4 van de 55 pagina's
In winkelwagenDifferent tissues that have signals that appear similar on an MR image are described as: A) hypointense B) hyperintense C) isointense D) isodense - Answer isointense in a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton has been described as wobbling li...
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...
Voorbeeld 3 van de 18 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...
different tissues that have signals that appear similar on a mr image are described as: - Answer isointense 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: - Answer isointense 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 exact middle of the bore of the magnet is termed: - Answer Isocenter 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...
Voorbeeld 4 van de 35 pagina's
In winkelwagenThe exact middle of the bore of the magnet is termed: - Answer Isocenter 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...
Tissues that have low (short) relaxation times have: - Answer High (long) relaxation rates 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 be...
Voorbeeld 1 van de 3 pagina's
In winkelwagenTissues that have low (short) relaxation times have: - Answer High (long) relaxation rates 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 be...
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 8 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 tissue characteristic that depends heavily on the relative content of fat molecules and free water is: - Answer Hydrogen concentration. 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 appli...
Voorbeeld 1 van de 3 pagina's
In winkelwagenThe tissue characteristic that depends heavily on the relative content of fat molecules and free water is: - Answer Hydrogen concentration. 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 appli...
ATOMS - Answer 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 - Answer A SUBATOMI...
Voorbeeld 3 van de 23 pagina's
In winkelwagenATOMS - Answer 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 - Answer A SUBATOMI...
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 ma...
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 ma...
Signal - 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...
Voorbeeld 2 van de 8 pagina's
In winkelwagenSignal - 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...
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 ...
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 ...
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...
Voorbeeld 3 van de 16 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...
The area in Asia that first discovered magnets is known as? - Answer Magnesia The first magnets were called magnetites because the people that lived in the area where they were found were known as? - Answer Magnetes For centuries, sailors use magnets for which of the following purposes? - Answ...
Voorbeeld 3 van de 26 pagina's
In winkelwagenThe area in Asia that first discovered magnets is known as? - Answer Magnesia The first magnets were called magnetites because the people that lived in the area where they were found were known as? - Answer Magnetes For centuries, sailors use magnets for which of the following purposes? - Answ...
Different tissues that have signals that appear similar on an MR image are described as: - Answer isointense 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 precession...
Voorbeeld 3 van de 24 pagina's
In winkelwagenDifferent tissues that have signals that appear similar on an MR image are described as: - Answer isointense 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 precession...
Nuclear magnetic resonance. - Answer Magnetic Resonance Imaging is derived from the process known as: Magnetic field, proton, radio-wave - Answer On a very basic level, the three basic components required to attain MR signals are: Superior soft-tissue contrast resolution. - Answer In compariso...
Voorbeeld 2 van de 9 pagina's
In winkelwagenNuclear magnetic resonance. - Answer Magnetic Resonance Imaging is derived from the process known as: Magnetic field, proton, radio-wave - Answer On a very basic level, the three basic components required to attain MR signals are: Superior soft-tissue contrast resolution. - Answer In compariso...
Studies have demonstrated that persons with suspected intraocular metallic bodies must be screened prior to entering the static magnetic field. This can be adequately accomplished by obtaining: - Answer plain film x-rays of the orbits Orbital screening for suspected intraocular metallic bodies sh...
Voorbeeld 2 van de 8 pagina's
In winkelwagenStudies have demonstrated that persons with suspected intraocular metallic bodies must be screened prior to entering the static magnetic field. This can be adequately accomplished by obtaining: - Answer plain film x-rays of the orbits Orbital screening for suspected intraocular metallic bodies sh...
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