Welcome to your CT Scan NAME: EMAIL: [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 . [Which of the following corresponds to the low- attenuation area indicated by Number 3 on the figure?] renal cortex renal pelvis renal calyx renal pyramid None Comment . [The mathematical manipulations required during the reconstruction of a CT image are accomplished using a(n): 1. algorithm 2. kernel 3. mathematical filter function] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None . [Abnormalities of the middle and inner ear may be best demonstrated with CT utilizing sections.] 1- to 2-mm 3- to 4-mm 5-mm 10-mm None . [Number 2 on the figure corresponds to which of the following? Fig.] medial rectus muscle optic nerve lateral rectus muscle superior oblique muscle None Comment . [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 . [A patient’s blood pressure is measured as 140/70 mm Hg. The number 140 represents:] the pressure within the arterial vessels during contraction of the heart the pressure exerted on the chambers of the heart while it is relaxed the pressure within the arterial vessels while the heart is relaxed the pressure exerted on the chambers of the heart during a contraction None . [The International Normalized Ratio (INR) is calcu- lated to standardize which of the following labora- tory values?] prothrombin time (PT) partial thromboplastin time (PTT) blood urea nitrogen (BUN) glomerular filtration rate (GFR) None . [The acquisition of a series of CT images at a single anatomic location over a set period is referred to as:] ultrafast CT cine CT conventional CT temporal CT None . [Number 2 on the figure corresponds to which of the following? Fig ] left ovary bladder sigmoid colon uterus None Comment . [The amount of x-ray energy absorbed in a quantity of air is termed:] dose profile kerma becquerel MSAD None . [Complete CT examinations of the chest for investi- gation of bronchogenic carcinoma should include sections from the:] mandible through the liver apices to the diaphragm top of the apices through the liver clavicles through the adrenals None . [The maximum number of simultaneous sections an MSCT system can acquire per gantry rotation is controlled by the number of:] detector rows data channels focal spots x-ray tubes None . [The reduction in intensity of an x-ray beam as it interacts with matter is called:] scatter attenuation transmission luminescence None . [When one is viewing a minimum intensity projection (min-IP) image, each pixel represents] the maximum attenuation occurring within the voxel the average attenuation occurring within the voxel the minimum attenuation occurring within the voxel all attenuation occurring within the voxel above a set threshold value None . [Arterial phase CT imaging of the liver is used to optimally demonstrate which of the following?] fatty infiltration hepatic cysts portal vein thrombosis hepatocellular carcinoma (HCC) None . [Which of the following contrast agent administra- tion techniques should be used for a general CT sur- vey of the abdomen? 1. 400-600 mL oral contrast agent 45-90 minutes prior to the exam 2. 250 mL oral contrast agent immediately before the exam 3. 700-900 mL contrast agent administered as an enema immediately before the exam] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None . [The major disadvantage of the fan- or cone-shaped x-ray beams used in modern CT units in comparison with the “pencil-thin” beams of older units is:] increased transmission measurements greater patient radiation dose decreased transmission measurements excess tube wear None . [In multislice CT (MSCT), the combined thicknesses of all of the sections simultaneously acquired with each gantry rotation are called the:] detector configuration beam pitch detector pitch total collimation None . [The Stanford type A dissecting aneurysm affects which portion of the aorta?] ascending thoracic descending thoracic abdominal bifurcation None . Time's up
