ARMRIT QUESTIONS WITH
SOLUTIONS
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 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: - Answer-37%
Which cryogenic material can produce temperature as low as 4 degrees Kelvin? -
Answer-Liquid Helium
The T1 process is also known as - Answer-Spin-Lattice
a 90 degree radio-frequency pulse will alter the net magnetization vector. Another effect
is: - Answer-The hydrogen protons will have phase coherence.
Which type of MRI magnet requires no electricity to maintain its magnetic field and can
weigh from 18,000 lb. to 200,000 lb.? - Answer-Permanent
To describe the uniformity of the MRI system's main magnetic field, the term employed
is - Answer-Homogeneity
The purpose of magnetic resonance angiography is to image the - Answer-Blood Flow
Magnetic Resonance Imaging is derived from the process known as: - Answer-Nuclear
Magnetic resonance
The introduction of gadolinium based contrast enhancement agents by Intra-venous
injection can involve passing through an abnormal blood brain barrier. The tissue
compartments involved are the: - Answer-Intravascular to interstitial
In a pulse sequence, transmitting an initial 90 degree radio-frequency pulse will cause
the net magnetization vector to: - Answer-Shift in both size and direction.
