MRI Physics Quiz 2 Questions and Answers
100% Solved
Which of the following is true regarding the hydrogen protons in a PT's body when placed in the
magnet of an MR system: ✔️✔️More protons align with the main magnetic field than against
the main magnetic field
T1 relaxation refers to: ✔️✔️Longitudinal relaxation
All parts of an atom are in constant motion with the only exception being the protons, which
are somewhat motionless most of the time. ✔️✔️False
MR research is being performed at 4.0T. At what frequency should the RF pulse be transmitted
in order to disturb protons experiencing a 4T field? ✔️✔️170 MHz
T1 recovery is also commonly referred to as ✔️✔️spin lattice relaxation
An atom is said to be magnetic, which is mainly from what atomic motion? ✔️✔️The spin of
the proton within the nucleus
In a given MR system, the magnetization of protons within a PT precesses at 63.83 MHz.
Without the interference of any other component, what is the expected result if RF energy is
applied at a frequency of 63.83 MHz. ✔️✔️All of the PT's protons within the range of the
transmitting antenna will be disturbed by the external energy
Which of the following parameters controls the amount of contrast seen in an image due to
relaxation: ✔️✔️TR
100% Solved
Which of the following is true regarding the hydrogen protons in a PT's body when placed in the
magnet of an MR system: ✔️✔️More protons align with the main magnetic field than against
the main magnetic field
T1 relaxation refers to: ✔️✔️Longitudinal relaxation
All parts of an atom are in constant motion with the only exception being the protons, which
are somewhat motionless most of the time. ✔️✔️False
MR research is being performed at 4.0T. At what frequency should the RF pulse be transmitted
in order to disturb protons experiencing a 4T field? ✔️✔️170 MHz
T1 recovery is also commonly referred to as ✔️✔️spin lattice relaxation
An atom is said to be magnetic, which is mainly from what atomic motion? ✔️✔️The spin of
the proton within the nucleus
In a given MR system, the magnetization of protons within a PT precesses at 63.83 MHz.
Without the interference of any other component, what is the expected result if RF energy is
applied at a frequency of 63.83 MHz. ✔️✔️All of the PT's protons within the range of the
transmitting antenna will be disturbed by the external energy
Which of the following parameters controls the amount of contrast seen in an image due to
relaxation: ✔️✔️TR
