Welcome to your CT Scan NAME: EMAIL: [The volume and density of calcium measured in the coronary arteries on MDCT examination are quan- tified with use of a value called the:] Euler constant Hounsfield number Agatston score Lambert-Beer value None . [Number 4 on the figure corresponds to which of the following? Fig.] superior facet pedicle transverse process lamina None Comment . [During CT examination of the chest, the administration of a saline flush following the bolus injection of iodinated IV contrast media helps alleviate artifact from dense contrast in the:] ascending aorta superior vena cava descending aorta inferior vena cava None . [The kidneys are located in the retroperitoneum and are bound by a band of fibrous connective tissue called:] Cooper’s ligament Camper’s fascia linea alba Camper’s fascia None . [The intrathecal administration of an iodinated contrast agent in the patient in the figure would allow for greater visualization of the:1. spinal cord2. nerve roots3. anulus fibrosis Use Fig.] 1 only 1 and 2 only 1 and 3 only 1, 2, and 3 None Comment . [Number 6 on the figure corresponds to which of the following? Fig.] renal cortex renal pelvis renal calyx renal pyramid None Comment . [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 . [A total volume of 125 mL of an iodinated contrast agent is administered intravenously via automatic injector in 50 seconds. The flow rate for this injection is:] 0.75 mL/sec 1.25 mL/sec 1.75 mL/sec 2.5 mL/sec None . [A CT image is formed in part by projecting back all of the attenuation values recorded during data acquisition onto a:] pixel voxel matrix reformat None . [The anatomic plane of the image in the figure can be best described as the: Fig.] coronal plane sagittal plane axial plane oblique axial plane None Comment . [The most common indication for CT-guided percu- taneous biopsy is the:] identification of foreign bodies quantification of bone mineral density confirmation of a malignancy measurement of tissue perfusion None . [The areas of image quality degradation indicated by number 3 on the figure are an example of:] aliasing artifact windmill artifact pulsation artifact beam-hardening artifact None Comment . [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 . [Which of the following must be included when one is obtaining informed consent for an invasive procedure? 1. explanation of the examination techniques 2. the possible risks and benefits of the exam 3. alternatives to the procedure involved] 1 only 1 and 2 only 1 and 3 only 1, 2 and 3 None . [During CT examinations, the patient’s body should be shielded above and below because of:] the rotational nature of the x-raytube extremely high kVp techniques lack of filtration of the CT beam reduced collimation of the CT beam None . [Pixels whose average attenuation coefficients are less than the coefficient of water have which of the following types of CT number values?] extremely large high positive negative high contrast None . [A complete CT study of the orbits should include:] 5 mm 5 mm axial sections only 10 mm 10 mm axial and coronal sections 3 mm 3 mm coronal sections only 2.5 mm 2.5 mm axial and coronal sections 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 in the figure corresponds to which of the following? Fig.] coracoid process acromion glenoid process clavicle None Comment . [Which of the following pathologic processes may be considered an interstitial disease of the lungs?] bronchiectasis Mediastinal lymph adenopathy pulmonary metastasis bronchogenic carcinoma None . Time's up
