CT Scan 19 Dec Welcome to your CT Scan NAME: EMAIL: [Which of the following window settings was used to display the image in the figure? Fig.] WL 400, WW 1500 WL 0, WW 150 WL þ50, WW 400 WL þ275, WW 2500 None Comment . [During which of the following CT procedures is the patient required to give informed consent?] non-contrast CT of the chest renal stone survey 3D reconstruction of the hip abdomen scan after IV contrast agent admini- stration None . [The implementation of corrective actions to improve any identified performance inadequacies of the CT system is referred to as:] quality control uniformity quality assurance linearity None . [Which of the following devices is used to measure the patient dose from a CT examination?] Geiger counter proportional counter ionization chamber film badge None . [An MDCT image is reconstructed using a 5122 matrix and a DFOV of 38 cm. If the detector collimation is set to a section width of 1.25 mm, what is the volume of each voxel?] 0.69 mm3 0.93 mm3 1.26 mm3 0.69 mm3 None . [A standard CT image reconstructed on a 5122 matrix has a digital size of approximately:] 0.5 MB 3.0 MB 5.0 MB 10.0 MB None . [During CT x-ray exposure, the product of the selected mA setting and the scan time is called the:] effective mAs peak mAs absorbed mAs constant mAs None . [Compared with conventional radiography, computed tomography produces diagnostic images with better:] low-contrast resolution spatial resolution minute detail patient radiation dose reduction None . [Number 6 on the figure corresponds to which of the following? Use Fig.] uterus rectum bladder sigmoid colon None Comment . [Number 7 on the figure corresponds to which of the following?] duodenum pancreatic head jejunum gallbladder None Comment . [The type of MSCT detector array that contains multiple rows of detector elements, each of the same length, is called a(n):] uniform matrix array adaptive array hybrid array stationary array None . [Which of the following statements comparing the efficiency of scintillation and gas ionization detectors is correct?] Both have approximately the same capture efficiency. The scintillation detector has a higher capture efficiency. Unlike the scintillation detector, the gas ionization detector has a problem with afterglow. Gas ionization detectors have a higher conversion efficiency. None . [Which of the following refers to the surgical resection of the pancreas and duodenum for treatment of pancreatic carcinoma?] endoscopic retrograde cholangio pancreatography(ERCP) cholecystectomy Roux-en-Y anastomosis Whipple procedure None . [A focused, thin-section axial CT acquisition through just the region of the vocal cords should extend:] from the external auditory meatus inferiorly to the mandible from the hard palate inferiorly to the hyoid bone from just above the hyoid bone inferiorly through the cricoid cartilage from the cricoid cartilage inferiorly through ster- noclavicular joint None . [Number 6 on the figure corresponds to which of the following? Use Fig. ] anterior cerebral artery falx cerebri callosal marginal artery middle cerebral artery None Comment . [Number 4 on the figure corresponds to which of the following?] descending colon spleen adrenal gland renal vein None Comment . [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 5 on the figure corresponds to which of the following?] transverse colon stomach duodenum hepatic flexure None Comment . [Which of the following window settings was most likely used to display the image in the figure? Fig. ] WL þ300, WW 1000 WL þ50, WW 50 WL þ50, WW 150 WL þ400, WW 3000 None Comment . [Number 4 in the figure corresponds to which of the following? Fig.] spleen duodenum left adrenal gland large colon None Comment . Time's up
