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ARRT MRI MOCK REGISTRY EXAM STUDY MATERIALS QUESTION AND ANSWERS (VERIFIED ANSWERS)
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ARRT MRI MOCK REGISTRY EXAM STUDY MATERIALS QUESTION AND ANSWERS (VERIFIED ANSWERS)
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ESTUDYARRT MRI MOCK REGISTRY EXAM STUDY
MATERIALS QUESTION AND ANSWERS (VERIFIED
ANSWERS)
1. **When imaging a geriatric patient, while performing a PCA MRA sequence, which imaging parameter
might the operator adjust?**
- A. Field of view
- B. Presaturation band location
- C. Slice thickness
- D. VENC
- E. Contrast injection rate
- **Answer: D. VENC**
2. **As the number of phase encodings is increased from 256 to 512, what happens to the SNR (signal-
to-noise ratio)?**
- A. Increases
- B. Decreases
- C. Doubles
- D. Does not change
- E. Quadruples
- **Answer: B. Decreases**
3. **A magnetic vector has attributes of both __________ and _____________.**
- A. Strength; magnitude
- B. Direction; purpose
,ESTUDY
- C. Strength; flow
- D. Magnitude; direction
- **Answer: D. Magnitude; direction**
4. **What element in the body is primarily used in clinical MR imaging?**
- A. Helium
- B. Hydrogen
- C. Oxygen
- D. Calcium
- **Answer: B. Hydrogen**
5. **Which of the following best describes an IR sequence?**
- A. A 180° pulse followed by a 90°/180° combination
- B. A 90° pulse followed by a 180° pulse
- C. A train of gradient echoes
- D. A train of spin echoes
- **Answer: A. A 180° pulse followed by a 90°/180° combination**
6. **Gradient echo sequences requiring high signal from fluid are known as all of the following
EXCEPT:**
- A. T2* gradient echo
- B. Steady-state gradient echo
- C. Coherent gradient echo
- D. Incoherent gradient echo
- **Answer: D. Incoherent gradient echo**
,ESTUDY
7. **The medial and lateral rectus muscles are located in the:**
- A. Ears
- B. Posterior pelvic region
- C. Proximal calves
- D. Eyes
- E. Superior shoulder regions
- F. Soft tissues of the neck
- **Answer: D. Eyes**
8. **Reducing the number of lines filled in k-space will produce an image:**
- A. With a decrease in spatial resolution
- B. With an increase in spatial resolution
- C. With a decrease in overall SNR
- D. With an increase in overall SNR
- E. With a reduced overall scan time
- F. B, C and E only
- G. A, D and E only
- **Answer: G. A, D and E only**
9. **The smallest object that can be resolved in an image acquired with a 24cm FOV and a 272 x 272
matrix is _________ mm.**
- A. 0.76mm
- B. 0.88mm
- C. 0.93mm
- D. 1.13mm
- E. 1.24mm
, ESTUDY
- **Answer: B. 0.88mm**
10. **To produce an image based on differences in T1, the time interval between 90° excitation pulses
should be:**
- A. Long
- B. Short
- C. Refocussed
- D. Inverted
- **Answer: B. Short**
11. **The energy used to form MRI images is ____________ the patient's tissues.**
- A. Emitted from
- B. Attenuated by
- C. Amplified from
- D. Reflected off
- **Answer: A. Emitted from**
12. **According to the CDC, what type of isolation precautions should be used for HIV-positive patients
in the MRI suite?**
- A. Respiratory
- B. Droplet
- C. Standard (universal)
- D. Enteric
- E. Contact
- **Answer: C. Standard (universal)**
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