Question 1: How does the radiation dose of tomosynthesis compare to mammography? |
Reference: | H. Machida, T Yuhara, et al. Radiation Dose of Digital Tomosynthesis for Sinonasal Examination: Comparison with Multi-Detector CT, Eur J Radiol 81, 1140-1145, 2012
|
Choice A: | Slightly less than mammography. |
Choice B: | Equal to mammography. |
Choice C: | Slightly more than mammography. |
Question 2: CT and tomosynthesis images are acquired as a series of projections. How does a projection image sample the Fourier domain of an object |
Reference: | J. Zhang, C. Yu, A Novel Solid-Angle Tomosynthesis (SAT) Scanning Scheme, Medical Physics, 37(8), 2010
|
Choice A: | A line in the Fourier domain. |
Choice B: | A plane in the Fourier domain. |
Choice C: | A double-napped cone. |
Choice D: | It fully samples the Fourier domain. |
Question 3: How does spatial resolution of tomosynthesis compare to CT? |
Reference: | Acciavatti RJ, Maidment ADA. Observation of Super-Resolution in Digital Breast Tomosynthesis. Med Phys. 2012;39(12):7518-39.
|
Choice A: | Poorer x, y, and z resolution. |
Choice B: | Poorer x & y resolution; better z resolution. |
Choice C: | Better x, y, and z resolution. |
Choice D: | Better x & y resolution; poorer z resolution. |
Choice E: | Same x, y, and z resolution. |
Question 4: The radiation dose in tomosynthesis is determinedly primarily by which factor? |
Reference: | T. Olgar, T Kahn, and D. Gosch, Average Glandular Dose in Digital Mammography and Breast Tomosynthesis, Rofo, 2012
|
Choice A: | Body part thickness. |
Choice B: | Angular range. |
Choice C: | Number of projections. |
Choice D: | Number of reconstructed images. |
Choice E: | Angular range AND number of projections. |
Question 5: What is the dependence of out-of-plane artifacts in tomosynthesis with increasing angular range? |
Reference: | Sechopoulos, C. Ghetti. Optimization of the acquisition geometry in digital tomosynthesis of the breast. Med. Phys. 36(4), 1199-1207, 2009.
|
Choice A: | Independent of angular range. |
Choice B: | Increases with increasing angular range. |
Choice C: | Decreases with increasing angular range. |
Question 6: When imaging a large circular disk, how does in-plane image contrast depend on angular range? |
Reference: | Sechopoulos, C. Ghetti. Optimization of the acquisition geometry in digital tomosynthesis of the breast. Med. Phys. 36(4), 1199-1207, 2009.
|
Choice A: | Independent of angular range. |
Choice B: | Increases with increasing angular range. |
Choice C: | Decreases with increasing angular range. |
Question 7: In breast x-ray imaging, what dose are we primarily concerned with? |
Reference: | Wu, X., Barnes, G. T., & Tucker, D. M. (1991). Spectral dependence of glandular tissue dose in screen-film mammography. Radiology, 179(1), 143-148.
|
Choice A: | Absorbed dose to the whole breast. |
Choice B: | Effective dose to the whole body. |
Choice C: | Absorbed dose to the glandular tissue. |
Choice D: | Equivalent dose from x-ray scatter. |
Question 8: What is the federal dose limit to a patient for a breast screening exam? |
Reference: | Jerrold T. Bushberg, J. Anthony Seibert, Edwin M. Leidholdt Jr., John M. Boone. "The Essential Physics of Medical Imaging" Third Edition.
|
Choice A: | 50 mSv per screening exam. |
Choice B: | 3 mGy per view. |
Choice C: | 1 mGy per view. |
Choice D: | There is no limit of dose to a patient. |
Question 9: What is the impact on breast dose of acquiring a breast tomosynthesis image in addition to a mammogram? |
Reference: | Feng, S. S. J., & Sechopoulos, I. (2012). Clinical digital breast tomosynthesis system: dosimetric characterization. Radiology, 263(1), 35-42.
|
Choice A: | No additional dose to the breast. |
Choice B: | An increase of dose of about 100%. |
Choice C: | An increase of dose of about 50%. |
Choice D: | An increase of dose of about 10%. |
Question 10: What is the impact on breast dose of replacing the mammogram with a synthetic image created from the breast tomosynthesis image? |
Reference: | Feng, S. S. J., & Sechopoulos, I. (2012). Clinical digital breast tomosynthesis system: dosimetric characterization. Radiology, 263(1), 35-42 |
Choice A: | There is no reduction in dose to the breast. |
Choice B: | The synthetic image requires a higher tomosynthesis dose. |
Choice C: | The synthetic image reduces the total dose by about half. |
Choice D: | The dose savings is minimal, given how much higher the tomosynthesis dose is compared to the mammo dose. |