ARMRIT (MRI PHYSICS AND INS) PRACTICE TEST
QUESTIONS AND ANSWERS
The T1 process is also known as: - ANSWER Spin Lattice
Which type of electromagnetic coils produce gradient magnetic field which
allow spatial localization to be obtained? - ANSWER Gradient coils
The Mxy component is most associated with: - ANSWER Transverse to Bo; T2
relaxation; Transverse magnetization
The resonant frequency of any substance in a magnetic field can be calculated
using the: - ANSWER Larmor equation
When the patient's area of interest is placed in the main magnetic field of the
MRI system, the hydrogen protons will: - ANSWER Precess parallel to Bo
The longitudinal component of the NMV is designated: - ANSWER Mz
What type of MRI magnet requires no electricity to maintain it's magnetic field
and can weigh anywhere from 18,000 lb. to 200,000 lb.? - ANSWER
Permanent
Most relevant component Mz is: - ANSWER Parallel to Bo; T1 relaxation;
Longitudinal magnetization
Which statement is true for the relaxation process? - ANSWER T2 decay
remains in the absence of T2* (star) effects
To describe the primary magnetic field uniformity of the Mri system, the term
that is used is: - ANSWER Homogeneity
QUESTIONS AND ANSWERS
The T1 process is also known as: - ANSWER Spin Lattice
Which type of electromagnetic coils produce gradient magnetic field which
allow spatial localization to be obtained? - ANSWER Gradient coils
The Mxy component is most associated with: - ANSWER Transverse to Bo; T2
relaxation; Transverse magnetization
The resonant frequency of any substance in a magnetic field can be calculated
using the: - ANSWER Larmor equation
When the patient's area of interest is placed in the main magnetic field of the
MRI system, the hydrogen protons will: - ANSWER Precess parallel to Bo
The longitudinal component of the NMV is designated: - ANSWER Mz
What type of MRI magnet requires no electricity to maintain it's magnetic field
and can weigh anywhere from 18,000 lb. to 200,000 lb.? - ANSWER
Permanent
Most relevant component Mz is: - ANSWER Parallel to Bo; T1 relaxation;
Longitudinal magnetization
Which statement is true for the relaxation process? - ANSWER T2 decay
remains in the absence of T2* (star) effects
To describe the primary magnetic field uniformity of the Mri system, the term
that is used is: - ANSWER Homogeneity
