Welcome to your CT Scan NAME: EMAIL: [Which of the following technical factors has a direct effect on patient dose?] matrix size algorithm mAs window level None . [A quality control procedure determines that the low- contrast resolution of a CT scanner is extremely poor. Likely causes are: 1. tube arcing 2. increased electronic noise 3. decreased tube output] 1 only 1 and 3 only 2 and 3 only 1, 2, and 3 None . [Number 6 on the figure corresponds to which of the following?] duodenum terminal ileum appendix pancreas None Comment . [An increase in the sampling rate during CT data acquisition corresponds to an increase in:] views per rotation patient radiation dose mage noise None . [The pathologic process indicated by number 3 on the figure most likely corresponds to:] atelectasis lymphadenopathy pleural effusion ground-glass opacity None Comment . [Risk factors for contrast-induced nephrotoxicity (CIN) include: 1. pheochromocytoma 2. allergy to shellfish 3. dehydration] 2 only 3 only 1 and 2 only 1, 2, and 3 None . [Number 2 in the figure corresponds to which of the following? Fig. ] inferior vena cava common bile duct portal vein superior mesenteric vein None Comment . [Advantages of a saline flush immediately following the IV administration of iodinated contrast material include: 1. reduction in required contrast agent dose 2. reduction in the incidence of contrast-induced nephrotoxicity (CIN) 3. reduction of streaking artifact from dense contrast agent in the vasculature] 1 only 3 only 2 and 3 only 1, 2, and 3 None . [Which of the following is NOT a portion of the small bowel?] duodenum jejunum ileum cecum None . [Number 6 on the figure corresponds to which of the following? Fig.] renal cortex renal pelvis renal calyx renal pyramid None Comment . [Number 5 on the figure corresponds to which of the following?] right brachiocephalic vein left subclavian artery left brachiocephalic vein brachiocephalic artery None Comment . [On an ECG of the complete cardiac cycle, at which portion of the R-R interval is the heart muscle in diastole?] 10%-20% 35%-50% 55%-75% 85%-95% None . [Which of the following sets of section width and spacing would be most suitable for a general survey CT of the neck?] 0.75 mm thick every 0.75 mm 3 mm thick every 5 mm 3 mm thick every 3 mm 10 mm thick every 10 mm None Comment . [The continuous gantry rotation required by helical CT acquisition is made possible by the application of:] electromagnetic bushings titanium bearings slip-rings oil-cooled couplings None . [Which of the following statements comparing the efficiency of scintillation and gas ionization detectors is correct?] Both have approximately the same capture efficiency. The scintillation detector has a higher capture efficiency. Unlike the scintillation detector, the gas ionization detector has a problem with afterglow. Gas ionization detectors have a higher conversion efficiency. None . [The section thickness that would demonstrate the greatest detail of the paranasal sinuses is:] 3 mm 5 mm 7 mm 10 mm None Comment . [Which of the following abbreviations is used to identify a computerized network that stores, retrieves, communicates, and displays digital medical images?] WORM PACS DICOM HIPAA None . [When one is viewing a multiplanar reformation (MPR) image, each pixel represents:] the maximum attentuation occurring within the voxel the average attenuation occurring within the voxel the minimum attenuation occurring within the voxel all attenuation occurring within the voxel None . [Number 1 on the figure corresponds to which of the following? Fig] capitate lunate hamate scaphoid None Comment . [Which of the following radiation dose indices is a measure of the total radiation exposure for an entire series of CT images? Check powers in options below] CTDI100 dose length product (DLP) CTDIvol multiple scan average dose (MSAD) None . Time's up
