Welcome to your CT Scan NAME: EMAIL: [If all other technical factors remain constant, which of the following would serve to decrease patient radiation dose during a helical SSCT examination?] decreased scan field of view (SFOV) decreased filtration increased pitch increased matrix size None . [Which of the following is considered an analytic form of image reconstruction? 1. iterative technique 2. Fourier reconstruction 3. filtered back-projection] 1 only 1 and 2 only 2 and 3 only 1, 2, and 3 None . [A region of interest (ROI) measurement placed over a portion of a CT image provides which of the following?] distance (mm) diameter (mm) linear attenuation coefficient (m) average CT number (HU) None . [Number 1 on the figure corresponds to which of the following?] psoas muscle gluteus medius muscle liacus muscle rectus abdominis muscle None . [Axial CT images of the knee may be acquired in four separate series with gantry angulations of 0, 30, 45, and 60 degrees in order to demonstrate the:] tibial plateau patellofemoral joint medial and lateral menisci patellofemoral joint None . [The measurement of CT system performance through quality testing procedures and evaluation of the test results is referred to as:] calibration uniformity quality assurance linearity None . [Number 1 on the figure corresponds to which of the following? Use Fig.] splenium of the corpus callosum internal capsule body of the corpus callosum genu of the corpus callosum None Comment . [The average photon energy of the CT x-ray beam can be increased by:] increasing mAs increasing filtration increasing collimation all of the above None . [The injection rate of an automatic injector is set at 1.5 mL/sec. What is the injection time for a contrast agent volume of 150 mL?] 60 seconds 90 seconds 100 seconds 120 seconds None . [Which of the following phases of renal contrast enhancement best demonstrates transitional cell carcinoma (TCC) of the bladder?] early arterial corticomedullary nephrographic early arterial None . [Number 3 on the figure corresponds to which of the following? Fig. ] coracoid process acromion glenoid process clavicle None Comment . [During volumetric CT acquisition, the slice sensitivity profile (SSP) graphically represents the:] effective section width dose profile beam width detector collimation None . [An entero vesical fistula is an abnormal communication between the bowel and the:] uterus bladder vagina umbilicus None . [The full width at half maximum (FWHM) of a CT scanner is used to describe:] spatial resolution contrast resolution noise calibration accuracy None . [The angiographic assessment known as a “CT run- off” evaluates the peripheral arterial tree from the renal arteries through the:] aortic arch superior mesenteric artery aortic bifurcation distal lower extremity None . [Effective dose is a relative radiation dose measurement term that accounts for the:] beam pitch tissue radiosensitivity detector pitch collimation None . [Which of the following is/are severe adverse reaction(s) to iodinated intravenous contrast media? 1. anaphylaxis 2. urticaria 3. vomiting] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None . [The use of water as an oral contrast material for CT of the abdomen and/or pelvis has several potential advantages, including: 1. increased palatability and improved patient comfort 2. better demonstration of enhancing bowel wall 3. no interference with 3D applications] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None . [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 . [Number 1 on the figure corresponds to which of the following?] right brachiocephalic artery right pulmonary artery right pericardiacophrenic artery right subclavian artery None Comment . Time's up
