Welcome to your CT Scan NAME: EMAIL: [Number 6 on the figure corresponds to which of the following?] duodenum terminal ileum appendix pancreas None Comment . [The prone position may be used for a post- myelogram CT examination of the lumbar spine in an effort to:] reduce the lordotic curve decrease patient gonadal radiation dose reduce metrizamide pooling increase the lordotic curve None . [Number 3 on the figure corresponds to which of the following?] left posterior cerebral artery left middle cerebral artery left anterior cerebral artery left posterior communicating artery None Comment . [Number 2 on the figure corresponds to which of the following?] aortic arch pulmonary trunk superior vena cava left anterior descending artery None Comment . [The mediastinum includes which of the following anatomic structures? 1. superior vena cava 2. stomach 3. ascending aorta] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None . [Number 3 on the figure corresponds to which of the following? Use Fig.] pineal gland middle cerebral artery fourth ventricle aqueduct of Sylvius None Comment . [The major disadvantage of the back-projection method of image reconstruction is the appearance of the:] partial volume effect ring artifact Gibb phenomenon star artifact None . [Number 2 on the figure corresponds to which of the following? Fig.] superior facet pedicle transverse process lamina None Comment . [Which of the following is used to archive a hard copy of a CT image?] laser film PACS CD-ROM laser film None . [Which of the following may be considered one of the high-osmolar contrast media (HOCM)? 1. iothalamate meglumine 2. diatrizoate sodium 3. iohexol] 1 only 3 only 1 and 2 only 1, 2, and 3 None . [Number 2 on the figure corresponds to which of the following?] superior mesenteric vein superior mesenteric artery renal artery superior mesenteric vein None Comment . [Daily air or water calibration of the CT system is performed to evaluate which of the following components of image quality?] contrast resolution temporal resolution uniformity linearity None . [Which number on the figure corresponds to the anterior horn of the lateral ventricle?] 1 5 3 2 None Comment . [For single-slice CT (SSCT) systems, which of the following statements regarding retrospective image reconstruction is FALSE?] The algorithm, matrix size, and DFOV may all be changed. The slice thickness and SFOV may be changed. Scan (raw) data must be available. Retrospective image reconstruction may be used to adjust the centre of the image. None . [The region of interest (ROI) measurement in the figure provides an average density of þ1.9 HU. This material is most likely:] fat blood tumor water 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 . [Reformatted CT image planes that lie perpendicular to the original plane of acquisition may be described as:] oblique orthogonal obtuse orthographic None . [Which of the following technical maneuvers may be used to remove unwanted pulsation artifacts from cardiac motion during a CTA of the chest for pul- monary embolism?] automated bolus tracking automatic tube current modulation retrospective ECG gating saline flush None . [Which of the following units is used to express the total patient dose from a helically acquired CT examination?] roentgens (R) curies (Ci) R-cm (roentgens per centimeter) mGy-cm (milligrays per centimeter) None . [Which of the following would serve to reduce the image artifact present in the figure? increase in filtration(2) increase in kVp (3) increase in section width] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None Comment . Time's up
