Welcome to your CT Scan NAME: EMAIL: [After initiation of rapid bolus administration of an iodinated contrast agent, the arterial phase of hepatic contrast enhancement occurs at approximately:] 15-20 seconds 25-35 seconds 60-70 seconds 120-180 seconds None . [The range of serum iodine concentration for ade- quate tissue opacification during contrast-enhanced CT examinations is:] 2-8 mg/mL 12-20 mg/mL 30-42 mg/mL 75-105 mg/mL None . [First-generation CT scanners used a method of data acquisition based on a ________ principle.] multiplanar rotation-only translate-rotate transaxial None . [The ability of an MSCT system to freeze motion and provide an image free of blurring is called:] in-plane spatial resolution longitudinal spatial resolution temporal resolution contrast resolution None . [Which of the following is NOT a portion of the small bowel?] duodenum jejunum ileum cecum None . [When choosing a scan field of view (SFOV), the CT technologist is controlling the: 1. diameter of data acquisition 2. number of activated detectors within the array 3. correction factors for the specific area of anatomic interest] 2 only 1 and 2 only 1 and 3 only 1 and 2 only None . [The average density of a mass within the kidney measures 75 Hounsfield units (HU). The mass is most likely a:] cyst lipoma stone hydrocele 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 . [A common area for inflammation, the primary drainage opening within the sinus cavities is referred to as the:] mucosal fossa adenovestibular complex external olfactory canal mucosal fossa None . [First-generation CT scanners possess which of the following characteristics?] pencil-thin x-ray beam silver halide detectors rotate-rotate geometry nutating detector array None . [MSCT systems typically employ which of the following types of detectors?] tungsten ring solid-state scintillation charged-coupled device (CCD) gas ionization None . [Number 1 on the figure corresponds to which of the following? Fig.] trachea piriform sinus aryepiglottic fold vocal cord None Comment . [The imaging plane that is parallel to the foot’s plan- tar surface is called the:] coronal plane sagittal plane axial plane oblique axial plane None . [Which of the following would serve to increase spa- tial resolution of a CT exam using a large focal spot size, 5-mm sections, and a 5122 matrix? 1. change to small focal spot size 2. acquire 2.5-mm sections 3. reconstruct images in a 3202 matrix] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None . [A _____ is a benign, highly vascular mass commonly found in the liver.] hematoid vasculoma hemogenic carcinoma hemangioma None . [Which of the following protocols would provide the best image quality for a 3D disarticulation study of the hip?] 10 mm 15 mm sections, standard algorithm 10 mm 10 mm sections, bone algorithm 1.5 mm 1.0 mm sections, bone algorithm 5 mm 7 mm sections, standard algorithm None . [The potentially serious decline in renal function following the IV administration of contrast material is called:] anaphylaxis bronchospasm contrast-induced nephrotoxicity (CIN) urticaria None . [The abdominal space indicated by number 7 in the figure is commonly referred to as: Fig. ] Morison’s pouch cul-de-sac splenorenal recess subphrenic space None Comment . [Reduction of the type of artifact seen in the figure on a coronal MDCT view of the sinuses may be accomplished through:] an increase in the mA a decrease in the kVp coronal MPR images built from an axial acquisition a reduction in the scan field of view (SFOV) None Comment . [Which number in the figure corresponds to the trapezius muscle? Use Fig.] 4 3 6 5 None Comment . Time's up
