Matrix array detector - Samenvattingen, Aantekeningen en Examens

CT Registry Review (MIC) Questions and Answers Rated 100% In order for an x-ray photon to be measured it must: 1. enter the detector chamber 2. be absorbed by the detector material 3. be converted to a measurable event *ANS* 1,2,3 Which system component converts the projection attenuation data into the proper digital form for the array processor? *ANS* analog-to-digital converter Which of the following is NOT a function of a PACS system? a. reconstruction of the image from the raw d...

CT TEST REVIEW (TEST Q'S AND A'S FOR CT REGISTRY PREP. THIS IS FROM THE BOOK "COMPUTED TOMOGRAPHY FOR TECHNOLOGISTS: EXAM REVIEW" BY LOIS E ROMANS. PUBLISHED BY WOLTERS KLUWER, LIPPINCOTT WILLIAMS AND WILKINS.) Which is NOT a synonym for the preliminary/localizer image taken at the start of a CT examination? A. Topogram B. Scout C. Scanogram D. Spiral - Correct Answer D. Spiral The ability of a system to differentiate, on the image, objects with similar densities is known as: A. Hig...

Absorbed dose correct answers the amount of energy absorbed per unit mass (grays or rads) back projection correct answers - 3rd step in IR loop of iterative reconstruction algorithm - ray sum data are projected back onto a matrix. blood urea nitrogen (BUN) correct answers renal function (nitrogen in blood) (7-25mg/dl) bow-tie filter correct answers Filter compensating for a cylindrical shape (body) -filter is thicker at the ends contiguous images correct answers images with equal...

Mosby's Exam Review for CT 180-dgree linear interpolation (180 LI) - Answer-Type of algorith used for MSCT image reconstruction in which data acquired from a shorter distance (180 degrees) away from the reconstructed slice location are interpolated. absorbed dose - Answer-the amount of x-ray energy absorbed in a unit of mass. It is measured in grays. (Gy) 360-degree linear interpolation (360 LI) - Answer-type of algorithm used for MSCT image reconstruction in which two sets of projection...

How to calculate signal to noise - Answer-S/N = mean/STDEV -inverse of RSD -STDEV: 5 (#STDEV gaussian curve) -STDEV: peak-to-peak noise/5 S/N relationships - Answer--increase S/N, increase run time -decrease noise, increase S/N Beer's Law - AnswerBeer's Law Calculations - AnswerHard ionization vs soft ionization - Answer--hard: no M+ peak (or small) -soft: M+ peak is visible MS: hard ionization sources - Answer--impart high quantities of residual energy in the subject molecule invokin...

the assigned number that is related to the linear attenuation coefficient of the tissue within each voxel correct answers ct number opening in the center of the gantry correct answers aperture ct number of water correct answers zero t or f A pt with a pacemaker can have a CT scan correct answers true circular device that houses the xray tube correct answers gantry single square or picture element within a matrix correct answers pixel amount of blurring detail and sharpness corr...

Absorbed dose the amount of energy absorbed per unit mass (grays or rads) back projection - 3rd step in IR loop of iterative reconstruction algorithm - ray sum data are projected back onto a matrix. blood urea nitrogen (BUN) renal function (nitrogen in blood) (7-25mg/dl) bow-tie filter Filter compensating for a cylindrical shape (body) -filter is thicker at the ends contiguous images images with equal section thicknesses & reconstruction intervals Alia...

CT Final exam Questions with 100% Correct Answers | Verified | Updated CT scanning provides a _____ view of the body - answertransaxial the gantry of a spiral CT scanner contains - answerthe tube, the detectors, high voltage current the x-ray beam in a CT scanner is shaped into a ____ beam - answerfan the ratio of the amount of table advance per revolution to the section thickness defines - answerpitch the CT number of water is - answer0 when the field of view increases and the matrix s...

CT Final exam Questions with 100% Correct Answers | Verified | Updated CT scanning provides a _____ view of the body - answertransaxial the gantry of a spiral CT scanner contains - answerthe tube, the detectors, high voltage current the x-ray beam in a CT scanner is shaped into a ____ beam - answerfan the ratio of the amount of table advance per revolution to the section thickness defines - answerpitch the CT number of water is - answer0 when the field of view increases and the matrix s...

Each sweep of the source-detector around the body during CT is called a _____. correct answers translation Each CT projection records variations in ____. correct answers mass density and effective atomic number Each CT projection is ____. 1. printed on film 2. stored on the computer 3. displayed on the monitor correct answers stored on the computer The cross-sectional anatomy is translated into ____ during CT reconstruction. correct answers a matrix of values The first generation ...