NMTCB CT Board Exam Questions With 100% Correct Answers 2024, Exams of Advanced Education

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NMTCB CT Board Exam Questions With

100% Correct Answers 2024

CBF - Correct Answer-cerebral blood flow 50-60 mL / 100 g / min CBV - Correct Answer-cerebral blood volume 4-5 mL / 100 g platelet count - Correct Answer-140k-440k per uL of blood INR - Correct Answer-International Normalized Ratio 0.8-1. PTT - Correct Answer-partial thromboplastin time 25-35 seconds BUN - Correct Answer-7-25 mg / dL creatinine - Correct Answer-0.5-1.5 mg / dL

GFR (men) - Correct Answer-70 +/- 14 GFR (women) - Correct Answer-60 +/- 10 PT - Correct Answer-prothrombin time 12-15 seconds max IV contrast for a child shouldn't exceed - Correct Answer- 3 mL / kg of body weight excretion half-life of IV contrast - Correct Answer-1-2 hours barium sulfate concentration - Correct Answer-1-3% water-soluble oral contrast for abdomen/pelvis should contain ________% iodine - Correct Answer-2- high-osmolar contrast = _________ mOsm / kg of water - Correct Answer-1000-

risk factors for contrast-induced nephrotoxicity (CIN) - Correct Answer-diabetes myoloma cardiac disease advanced age hepatic contrast enhancement phases - Correct Answer- arterial phase portal/hepatic venous phase equilibrium phase delayed phase arterial phase of hepatic contrast enhancement - Correct Answer-25-35 seconds hypervascular tumors portal/hepatic venous phase of hepatic contrast enhancement

• Correct Answer-60-70 seconds hypovascular lesions & masses

equilibrium phase of hepatic contrast enhancement - Correct Answer-2-3 minutes delayed phase of hepatic contrast enhancement - Correct Answer-5-20 minutes hemangioma kidney contrast enhancement phases - Correct Answer- corticomedullary phase nephrographic phase excretory phase corticomedullary phase of kidney contrast enhancement - Correct Answer-30-40 seconds renal cortex & renal veins nephrographic phase of kidney contrast enhancement - Correct Answer-70-90 seconds parenchymal lesions excretory phase of kidney contrast enhancement - Correct Answer-3-5 minutes

renal pelvis, ureters, bladder disc soft center - Correct Answer-nucleus pulposus disc firm outer - Correct Answer-annulus fibrosus normal liver = ______ HU greater than spleen - Correct Answer- retroperitoneal organs - Correct Answer-duodenum pancreas adrenal glands kidneys ureters bladder CBF = - Correct Answer-CBV x MTT iliac arteries bifurcate at - Correct Answer-L5-S

a solitary pulmonary nodule is - Correct Answer-less than 3 cm Stanford type A dissecting aneurysm affects the - Correct Answer-ascending aorta Stanford type B dissecting aneurysm affects the - Correct Answer-descending aorta max blood glucose for PET/CT = - Correct Answer-150 mg / dL atrial systole on EKG - Correct Answer-P-wave ventricular systole on EKG - Correct Answer-QRS diastole on EKG - Correct Answer-T-wave parenteral routes of administration - Correct Answer- intramuscular intravenous intradermal subcutaneous

enteral routes of administration - Correct Answer-oral rectal articulation between inferior articular process of one vertebra with the superior articular process of another - Correct Answer-zygapophyseal joint forefoot - Correct Answer-metatarsals midfoot - Correct Answer-navicular cuboid cuneiforms hindfoot - Correct Answer-talus calcaneus excessive nitrogen in blood & is a symptom of - Correct Answer-azotemia renal failure

portion of small intestine that collapses in on itself - Correct Answer-intussusception the Agatston system quantifies coronary artery calcium as minimal if - Correct Answer-1- the Agatston system quantifies coronary artery calcium as mild if - Correct Answer-11- the Agatston system quantifies coronary artery calcium as moderate if - Correct Answer-101- the Agatston system quantifies coronary artery calcium as extensive if - Correct Answer-> 400 dysphagia - Correct Answer-difficulty swallowing stages of infection in order - Correct Answer-incubation prodromal active convalescence

hypertrophy of the facets that can lead to spinal stenosis - Correct Answer-spondylosis narrowing of the bony canals that contain the spinal cord, nerve roots, or both - Correct Answer-spinal stenosis a defect in the pars inarticularis commonly caused by osteophyte formation - Correct Answer-spondylolysis forward slipping of an upper vertebral body over the lower due to degenerative changes of the facet joints - Correct Answer-spondylolisthesis filtration in CT tube varies from - Correct Answer-6-9 mm Alumunum ability of detector to capture transmitted x-ray quanta & produce the appropriate response - Correct Answer-inherent absorption efficiency MSCT uses _____-shaped beams - Correct Answer-cone

beam pitch = - Correct Answer-table feed per rotation / total collimation FDG dose = - Correct Answer-10-15 mCi typical range for pixel values - Correct Answer--1024 HU - +3071 HU iterative methods of reconstruction include - Correct Answer- simultaneous reconstruction ray-by-ray correction point-by-point correction Fourier Transform is a(n) _______ method of reconstruction - Correct Answer-analytic the approximate inherent filtration of the CT x-ray amounts to the aluminum equivalent of - Correct Answer-3 mm longitudinal dimension of voxel - Correct Answer-z-axis

coronal imaging through the paranasal sinuses is typically performed with the plane of imaging - Correct Answer- perpendicular to the hard plate absorbed dose unit - Correct Answer-Gray effective dose unit - Correct Answer-Sievert the dose profile is always ______ than the slice sensitivity profile - Correct Answer-wider ________ is used in gas ionization chambers - Correct Answer- xenon decreasing quantum noise = _______ in mAs & section width - Correct Answer-increase increase in noise increases ______ & _____ but decreases _____ - Correct Answer-matrix size & collimation aperture size

+1500 - +2000 HU - Correct Answer-dense bone +50 - +65 HU - Correct Answer-muscle +30 - +35 HU - Correct Answer-blood 15 HU - Correct Answer-CSF 0 HU - Correct Answer-water -50 - -100 HU - Correct Answer-fat -550 - -950 HU - Correct Answer-lungs -1000 HU - Correct Answer-air temperature - Correct Answer-97.7 - 99.5 degrees Farenheight pulse (child) - Correct Answer-70-120 bpm

pulse (adult) - Correct Answer-60-100 bpm respiratory rate (child) - Correct Answer-20- respiratory rate (adult) - Correct Answer-12- What method of IV contrast agent administrations provides the greatest overall plasma iodine concentration? - Correct Answer-bolus technique Example of am iso-osmolar contrast media - Correct Answer- iodixanol (Visipaque) Advantages of a saline flush immediately following the IV administration of iodinated contrast include - Correct Answer- reduction in required contrast dose reduction in incidence of CIN reduction in streaking artifact from dense contrast in vasculature

Radiation exposure and its potentially harmful effects have a relationship that is termed _____ in nature - Correct Answer- stochastic Which isolation technique protects against infection transmitted through fecal material? - Correct Answer-enteric precautions What is an example of an ionic radiopaque contrast media? - Correct Answer-iothalamate-meglumine Components of a comprehensive CT stroke management protocol typically include: - Correct Answer-pre-contrast of brain CTA of brain & carotids CTP of brain On an EKG of the complete cardiac cycle, at which portion of the R-R interval is the heart muscle at diastole? - Correct Answer-55-75%

What study of the head is typically performed without contrast? - Correct Answer-CT of brain to r/o subdural hematoma Complex fractures of the wrist are most common in which carpal bone? - Correct Answer-scaphoid diffuse fatty infiltration of the hepatic parenchyma may be referred to as - Correct Answer-steatosis the adult spinal cord ends at the level of - Correct Answer-L1- L during a complete CT scan of the pelvis, sections should be obtained from the - Correct Answer-iliac crests to the pubic symphysis the recommended SFOV for a CT exam of the cervical spine is - Correct Answer-50 cm air trapping within the trachea and bronchial tree may be optimally demonstrated with multiplanar volume

reconstructions of the thorax known as - Correct Answer- minimum intensity projections portions of the small bowel include - Correct Answer- duodenum jejunum ileum collimation of the x-ray beam occurs - Correct Answer-at the x-ray tube, regulating slice thickness before the detectors, limiting the amount of scatter radiation absorbed the mathematical technique allowing the reconstruction of motion-free images from helically acquired CT data is called - Correct Answer-interpolation abbreviation used to identify a computerized network that stores, retrieves, communicates, and displays digital images - Correct Answer-PACS

a CT image is formed in part by projecting back all of the attenuation values recorded during data acquisition onto a - Correct Answer-matrix the acquisition of a series of CT images at single anatomic location over a set period is referred to as - Correct Answer- cine CT a standard CT image reconstructed on a 512x512 matrix has a digital size of approximately - Correct Answer-0.5 MB the term used to describe the relationship between the linear attenuation coefficient of an object and the calculated CT numbers is - Correct Answer-linearity quality control measurements to test the accuracy of the CT scanner's calibration should be performed - Correct Answer- daily the 3D technique that includes all of the acquired voxel information in the reconstructed model with adjustments to its opacity is termed - Correct Answer-volume rendering

the process of applying a mathematical filter to remove blurring from the reconstructed CT image is termed - Correct Answer-convolution the average photon energy of the CT x-ray beam can be increased by - Correct Answer-increasing filtration a solid-state device used to record the light flashes given off by a scintillation crystal - Correct Answer-photodiode the type of MSCT detector array that contains multiple rows of detector elements, each of the same length, is called a(n) - Correct Answer-uniform matrix array Segmenting the data acquisition process into separate components of smaller rotation angles may improve what component of CT image quality? - Correct Answer-temporal resolution the information included during the 3D reconstruction of a CT scan is controlled by the - Correct Answer-threshold setting

Which cranial nerve would an acoustic neuroma be found on?

• Correct Answer-8th (Vestibulocochlear nerve) Intrathecal injection of contrast places contrast directly into the - Correct Answer-Subarachnoid space Serum iodine concentration for adequate tissue opacification is - Correct Answer-2-8 mg/mL The Lisfranc joint is the articulation between the - Correct Answer-Tarsals and metatarsals Components of adnexal area of uterus - Correct Answer- Ovaries and Fallopian tubes At what percentage of overlap should CT sections be reconstructed to improve the quality of MPR images? - Correct Answer-50% Which of the paranasal sinuses is usually the last to develop? - Correct Answer-Frontal

Bowel obstruction due to loss of normal contractile motion in an area of the intestine is termed - Correct Answer-Ileus CTA of the renal arteries should be performed using a section width of - Correct Answer-1.25mm or less The kidneys are located in the retroperitoneum and are bound by a band of fibrous connective tissue called - Correct Answer- Gerota's fascia The prone position may be used for a post myelogram CT exam of the lumbar spine in an effort to - Correct Answer- Reduce metrizamide (contrast) pooling Pancreatic phase of contrast enhancement - Correct Answer- 35-45 seconds Filament sizes for modern CT X-ray tubes range between - Correct Answer-0.5-1.2mm The mathematical process that allows MDCT images to be reconstructed at any point along the acquired volume is commonly referred to as - Correct Answer-Z-filtering

Fourth generation CT scanners use a ____ tube-detector configuration - Correct Answer-Rotate-stationary Which mathematical reconstruction methods is used by most modern CT scanners? - Correct Answer-Filtered back- projection Power output for a modern MDCT X-ray tube has an approximate range of - Correct Answer-60-100 kW The mathematical technique that involves that estimation of an unknown value from values on either side of it is known as

• Correct Answer-Interpolation Bow-tie filters are employed in a CT x-ray system to reduce - Correct Answer-Patient radiation dose An error occurring in the superior portion of the skull, where dense bone averages with the low-attenuating brain tissue (partial volume artifact) - Correct Answer-Cupping artifact