New Quiz 19 Dec Welcome to your CT Scan NAME: EMAIL: [When one is assessing an MTF graph such as the figure, the limiting resolution is determined at a point where the signal frequency corresponding to a particular object has reached:] 10% 20% 50% 100% None Comment . [Which of the following laboratory values is the most dependable measure of renal function?] BUN creatinine PT PTT None . [Which of the following paranasal sinuses is usually the last to fully develop?] frontal ethmoidal sphenoidal maxillary None . [Accurate demonstration of would most likely require the intravenous injection of an iodinated contrast agent during a CT study of the chest.] pneumonia asbestosis a dissecting aortic aneurysm a solitary pulmonary nodule 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 . [Which of the following terms is used to describe a patient who is having difficulty breathing?] dyslexia dyspnea dysphagia dysphasia None . [Number 3 on the figure corresponds to which of the following? Use Fig.] esophagus left pulmonary vein trachea left primary bronchus None Comment . [Number 4 on the figure corresponds to which of the following?] descending colon spleen adrenal gland renal vein None Comment . [Power output for a modern MDCT x-ray tube has an approximate range of:] 3-5 kilowatts (kW) 15-20 kilowatts (kW) 40-48 kilowatts (kW) 60-100 kilowatts (kW) None . [Number 3 on the figure corresponds to which of the following? Fig.] superior rectus muscle lateral rectus muscle medial rectus muscle inferior rectus muscle None Comment . [Which of the following radiation dose indices is a measure of the total radiation exposure for an entire series of CT images? Check powers in options below] CTDI100 dose length product (DLP) CTDIvol multiple scan average dose (MSAD) None . [This HRCT image of the chest was most likely acquired with a section width of:] 1 mm 5 mm 7 mm 10 mm None Comment . [The degenerative pathologic process involving the forward slipping of an upper vertebral body over a lower vertebral body is called:] spondylolisthesis spondylolysis herniated nucleus pulposus spondylolisthesis None . [The mathematical process that allows MDCT images to be reconstructed at any point along the acquired volume is commonly referred to as:] iteration filtered back-projection Fourier reconstruction z-filtering None . [The relative accuracy between calculated CT numbers and their respective linear attenuation coefficients is referred to as:] linearity calibration uniformity linearity None . [Which of the following contrast media may be utilized during the CT evaluation of the gastrointes- tinal tract? 1. diatrizoate meglumine (Gastrografin) 2. effervescent agents 3. iopamidol (Isovue)] 1 only 1 and 3 only 2 and 3 only 1, 2, and 3 None . [As related to the cardiac cycle, the term refers to the relaxation of heart muscle.] diastole equilibrium systole a-fib None . [MSCT systems are typically capable of differentiating adjacent objects with attenuation differences as small as:] 3 HU 10 HU 25 HU 60 HU None . [An entero vesical fistula is an abnormal communication between the bowel and the:] uterus bladder vagina umbilicus None . [Which of the following most likely describes the patient position during the formation of the image in the figure?] supine prone left lateral decubitus right lateral decubitus None Comment . Time's up
