Magnetization vector - Study guides, Class notes & Summaries

ARMRIT PHYSICS PRACTICE TEST - ANSWERED The tissue characteristic that depends heavily on the relative content of fat molecules and free water is: - Ans ️️ -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 application of a 90 degree radio-frequency pulse? - Ans ️️ -63% Immediately after an initial 90 degree radio-frequency pulse is turned off, the hydrogen ...

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? - Answer To navigate the seas Which of the following people named the ends of the magnet north and south poles? - Answer Petrus peregtinus de Maricourt In 1825, the British scientist, William Surgeon,...

ARMRIT Physics Exam Guide [Reviewed Study Set] 100% Correct Answers The tissue characteristic that depends heavily on the relative content of fat molecules and free water is: *Ans* T1 effects An equation derived to predict the MR signal intensity of a particular tissue as a result of a spin-echo pulse sequence is the: *Ans* Larmor equation Which equation is true of the relaxation process? *Ans* Without the effects of T2 star, T2 decay continues The Process of relaxation begins when.....

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 application of a 90 degree radio-frequency pulse? - ANSWER 63% Immediately after an initial 90 degree radio-frequency pulse is turned off, the hydrogen protons will begin to: - ANSWER Dephase A 90 de...

MRI ARMRIT physics UPDATED Exam Questions and CORRECT Answers T2 is the measurement of time for the transverse component of the net magnetization vector to decrease what percentage of its maximum value after the application of a 90 degree radio frequency pulse - CORRECT ANSWER- 37% The NMV is rotated to the physical negative Z axis by applying a...? - CORRECT ANSWERC)180 pulse Increasing which parameter is considered the "best" technique for improving image quality? - CORRECT ANSWER...

ARMRIT PHYSICS PRACTICE TEST 100% correct! 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 application of a 90 degree radio-frequency pulse? - ANSWER 63% Immediately after an initial 90 degree radio-frequency pulse is turned off, the hydrogen prot...

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 to be performed? - Answer-Gradient coils Which type of MRI magnet requires cryogen to cool magnetic coils to 4 degrees Kelvin? - AnswerSuperconductive T2 is the measurement of time for the transverse...

practice test 1 armrit| 30 Questiondifferent 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 Magnetic resonance imaging is derived from the process known as: - ANSWER Nuclear magnetic resonance Once the net magnetization vector (nmv) has moved away fr...

The NMV is rotated to the physical negative Z axis by applying a...? - C)180 pulse Increasing which parameter is considered the "best" technique for improving image quality? - C)NEX Studies have concluded that static magnetic fields up to what tesla produce no substantial harmful biological effects. - C)2.0 Tissues that have low (short) relaxation times have: - Higher relaxation rates Nuclei in their natural enviroment ( in the absence of a significant magnetic field) are aligned... - Ra...

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 to be performed? - ANSWER Gradient coils Which type of MRI magnet requires cryogen to cool magnetic coils to 4 degrees Kelvin? - ANSWER Superconductive T2 is the measurement of time for the tr...