2019 AAPM Annual Meeting
Back to session list

Session Title: Reducing Sedation and Anesthesia in Pediatric Radiology
Question 1: The FDA has issued a warning regarding the lengthy or repeated use of general anesthesia agents in which populations?
Reference:Bjur KA, et al. Anesthetic-Related Neurotoxicity and Neuroimaging in Children: A Call for Conversation. Journal of Child Neurology 2017, Vol. 32(6) 594-602.
Choice A:Children under 18 years of age
Choice B:Children under six years of age
Choice C:Pregnant women during the first trimester
Choice D:Pregnant women during the third trimester and children under three years of age
Question 2: Which modality most commonly requires sedation in children?
Reference:Huang YY, et al. Use of Anesthesia for Imaging Studies and Interventional Procedures in Children. J Neurosurg Anesthesiol 2016;28:400–404.
Choice A:CT
Choice B:Fluoroscopy
Choice C:MRI
Choice D:Ultrasound
Question 3: Sedation use for MRI is most commonly used in which of the following age groups?
Reference:Sum MY, et al. Using a checklist to assess if a child undergoing MRI needs general anaesthesia. Clin Radiol. 2019 Apr 3. pii: S0009-9260(19)30130-8.
Choice A:Neonates (0-1 years)
Choice B:3 to 5-year-olds
Choice C:6 to 8-year-olds
Choice D:9 to 11-year-olds
Question 4: For a detector collimation of 96 x 0.6, what is the scan speed with a 0.28 second rotation time and pitch of 2.9 for a dual source scanner?
Reference:The Essential Physics of Medical Imaging, Third Edition. Third, North American Edition edition. Philadelphia: LWW; 2011.
Choice A:59.6 cm/s
Choice B:43.7 cm/s
Choice C:72 cm/s
Choice D:5.96 cm/s
Question 5: For wide collimation (cone-beam) scanning, the main trade-off to scanning speed is increased:
Reference:Weir VJ, Zhang J. Radiation Dose Measurements in a 256-Slice Computed Tomography Scanner. J Med Phys. 2018;43(2):85–92. doi:10.4103/jmp.JMP_129_17
Choice A:Blur from motion
Choice B:Scatter
Choice C:Field of view
Choice D:Audible noise from scanner rotation
Question 6: A sparse matrix is defined as
Reference:Geethanath, et al. Critical Reviews in Biomed Eng, 2013 41(3): 183-204
Choice A:Most of the elements are empty
Choice B:Most of the elements are = 0
Choice C:Most of the elements are = 1
Choice D:The conjugate of the matrix
Question 7: Compressed Sensing MR techniques allow for decreased acquisition time because
Reference:Geethanath, et al. Critical Reviews in Biomed Eng, 2013 41(3): 183-204
Choice A:The k-space matrix is sparse.
Choice B:The reconstruction process is iterative.
Choice C:They are applied to information sparse anatomical regions of the body
Choice D:K-space is under-sampled.
Question 8: Compressed Sensing works on principle because:
Reference:Geethanath, et al. Critical Reviews in Biomed Eng, 2013 41(3): 183-204
Choice A:MR images are information dense.
Choice B:MR images contain a lot of redundant information.
Choice C:MR images are inherently high in contrast.
Choice D:MR images are inherently high in resolution.
Question 9: How does TOF-PET improve PET image quality?
Reference:“Improvement in Lesion Detection with Whole–Body Oncologic TOF – PET”. El Fakhri G., Surti S., Trott C.M., Scheuermann J., Karp J.S. J. Nucl. Med. 2011; 52: 347-353.
Choice A:Improve spatial resolution
Choice B:Increase contrast
Choice C:Increase count rates
Choice D:Reduce noise especially in large patients or at low contrast
Choice E:Increase noise
Question 10: Motion compensation in PET-MR yields promising results in improved lesion detection as compared to gated PET-CT because:
Reference:MRI-Based Nonrigid Motion Correction in Simultaneous PET/MRI. Chun S., Reese T., Ouyang J., Guerin B., Catana C., Zhu X, Alpert N., El Fakhri G. J. Nucl. Med. 2012; 53: 1-9.
Choice A:MR yields better spatial resolution than CT.
Choice B:MR acquisitions are faster than CT.
Choice C:MR is a non ionizing imaging modality.
Choice D:MR is more sensitive to motion than CT.
Choice E:MR allows to correct for motion while incorporating all counts detected hence greater SNR.
Back to session list