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COMPUTED TOMOGRAPHY QUESTIONS AND ANSWERS 100%.
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COMPUTED TOMOGRAPHY QUESTIONS AND ANSWERS 100%.
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COMPUTED TOMOGRAPHY QUESTIONSAND ANSWERS 100%.
What are the Fundamental Principle of CT ? ANS - Image of an object is reconstructed on the basis of
the attenuation that occurs as x-radiation is transmitted through it.
What are the Fundamental Principle of CT ? (Data Acquisition) ANS - X-ray beam is rotated around the
patient, exposing a given volume of tissue form all direction. Detector measures radiation as it
transmitted through PT.
What are the Fundamental Principle of CT ?(Image Reconstruction) ANS - Image reconstruction is define
as the magnitude of x-ray attenuation that occurs at spatially distributed points within the patient.
(Spatially-of or relating to space.)
What is the general process of CT imaging and the steps involved ? (Data Acquisition) ANS -
Measurement of the attenuation that occurs along each path through the patient form x-ray tube to
detector.
What is the general process of CT imaging and the steps involved ? (Data Reconstruction) ANS -
Computerized processing of the transmission measurements into the CT image.
What is the general process of CT imaging and the steps involved ? (Multidimensional Image Display)
ANS - Display of recon gray-scale image in 2D or 3D format; a representation of attenuation that
occurred across the scanned volume of tissue.
What is the general process of CT imaging and the steps involved ? (Image Archival and Communication)
ANS - Display as well as storage, both short-term and long term of images on computer workstations.
SCAN MODE ANS - SCAN MODE
What is the most basic scan mode ? ANS - Scout Image (Localizer,Topogram,Scanogram,Survey Scan)
, What is a Scout Image in CT ? ANS - Digital radiograph obtained by keeping the x-ray tube and detector
array in a fixed position while the pt bed translated (moved) through the gantry.
List the different views a scout image can be done. ANS - AP, PA, Lateral, and Oblique
What is Azimuth ? ANS - The angle of the tube and detectors in relationships the patient positioned
during scout acquisition.
What is the purpose of an scout image in CT ? ANS - A preliminary scan taken of a body region before a
definitive imaging study and serve to establish a baseline.
What is another name for Conventional CT ? ANS - Step-and-Shot
List the steps involved in Conventional CT form Start to Finish. (Once Slice) ANS - Complete revolution of
x-ray tube and acquiring a SINGLE DATA AT A PRECISE ANATOMIC LOCATION.--Data is
MATHEMATICALLY RECON INTO A SINGLE IMAGE. (Thickness is controlled by collocation)--Table moves
(index) for next predetermined anatomic position.
List the component involved in a CT system. ANS - 1. Powerful Computer
2. Display system
3. PT Bed
4. Gantry Components.
What does the CT Gantry houses? ANS - 1.Generator
2.X-ray tube
3.Various type of collimators
4.Data Acquisition system (DAS)
5.Slip-Rings
6.Detectors.
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