New Quiz 19 Dec Welcome to your CT Scan NAME: EMAIL: [During the use of CT fluoroscopy for guided interven- tional procedures, which of the following technical considerations may be used to reduce occupational radiation exposure? 1. increased kVp 2. lead shielding 3. use of a needle holder] 2 only 1 and 2 only 1 and 3 only 2 only None . [Number 2 corresponds to which of the following?] carotid canal incus cochlea vestibule None Comment . [The image in the figure was most likely displayed with the use of which of the following window widths?] 70 400 1300 3800 None Comment . [Pixels representing tissues with average attenuation coefficients greater than that of water have which of the following types of values?] extremely small positive negative low contrast None . [Number 1 on the figure corresponds to which of the following? Fig. ] inferior rectus muscle optic chiasm inferior oblique muscle None Comment . [Which number on the figure corresponds to the septum pellucidum?] 2 3 4 5 None Comment . [Which of the following 3D imaging techniques is utilized to provide “fly-through” images during CT colonography?] orthographic volume rendering shaded surface display (SSD) perspective volume rendering minimum intensity projection (min-IP) 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 . [Vital components of a CT urogram (CT-IVP) protocol include: 1. administration of 1200 to 1500 mL of a positive oral contrast agent 90 minutes prior to examination 2. thin-section excretory phase imaging of the entire urinary tract 3. volume-rendered 3D and maximum intensity projection (MIP) imaging of the urinary tract] 2 only 1 and 2 only 2 and 3 only 1, 2, and 3 None . [Which of the following is a manifestation of the partial volume artifact?] cupping Hounsfield bar aliasing streaking 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 . [The reduction in number of infectious organisms without a complete elimination is termed:] medical asepsis sterilization surgical asepsis immunization None . [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 . [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 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 . [As related to the cardiac cycle, the term refers to the relaxation of heart muscle.] diastole equilibrium systole a-fib None . [Number 4 in the figure corresponds to which of the following? Fig.] spleen duodenum left adrenal gland large colon None Comment . [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 . [Third-generation CT scanners use which of the following scan geometries?] translate-rotate Rotate stationary transaxial rotate-rotate None . [Percutaneous drainage under CT guidance may be used for the aspiration of which of the following processes] chronic subdural hematoma hydrocephalus abdominal abscess dissecting aortic aneurysm None . Time's up
