| Question 1: Which of the following statements about homogeneity testing using the manufacturer's procedure is not correct? |
| Reference: | American College of Radiology 2015 MRI Quality Control Manual |
| Choice A: | Results using the vendor’s testing procedure are most likely to be accepted by the vendor’s field service engineer. |
| Choice B: | ACR accreditation requires homogeneity to be measured using the manufacturer’s testing procedure |
| Choice C: | Homogeneity specified by the manufacturer are established using the manufacturer’s testing procedure. |
| Choice D: | The manufacturer’s testing procedure may require tools that are not readily available to the physicist. |
| Question 2: According to the American College of Radiology 2015 MRI Quality Control Manual, which of the following statements concerning suggested homogeneity performance criteria is not true? |
| Reference: | American College of Radiology 2015 MRI Quality Control Manual |
| Choice A: | Homogeneity criteria should be included in the Annual Performance Evaluation. |
| Choice B: | Homogeneity data are particular to the diametrical spherical volume used. |
| Choice C: | Obtained homogeneity values should agree closely with the manufacturer’s specifications |
| Choice D: | Results will differ based on whether ptp or rms is measured. |
| Choice E: | No specific values for homogeneity are indicated. |
| Question 3: Which method can be used to determine homogeneity in multiple diameters of spherical volume (DSV) in a single uniform fluid-filled phantom? |
| Reference: | American College of Radiology 2015 MRI Quality Control Manual and Chen HH et al, Routine testing of magnetic field homogeneity on clinical MRI systems. Med Phys 2006, 33(11): 4299-4306. |
| Choice A: | Spectral peak |
| Choice B: | Bandwidth difference |
| Choice C: | Phase difference |
| Question 4: True or false: Both peak-to-peak and rms B0 inhomogeneity can be measured with pre-scan spectral peak, bandwidth difference, and phase difference methods. |
| Reference: | American College of Radiology 2015 MRI Quality Control Manual |
| Choice A: | True |
| Choice B: | False |
| Question 5: The bandwidth difference approach to B0 homogeneity testing measures the field homogeneity in the direction of which axis? |
| Reference: | American College of Radiology 2015 MRI Quality Control Manual |
| Choice A: | Frequency encoding |
| Choice B: | Phase encoding |
| Choice C: | Slice selection |
| Question 6: True or false: decreasing the difference between echo times will decrease the number of phase wraps in a phase difference image. |
| Reference: | American College of Radiology 2015 MRI Quality Control Manual |
| Choice A: | True |
| Choice B: | False |
