Computed Tomography Questions and Correct Answers/ Latest Update / Already Graded

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Computed Tomography Questions and
Correct Answers/ Latest Update /
Already Graded
CT was developed in


Ans: 1970s




Pioneer of CT and also Nobel Prize winner?


Ans: Godfrey Hounsfield




A collimated x-ray beam is directed on the patient and it detected

by a


Ans: Solid state image receptor




3 possible Types of image planes shown on the CT monitors?


Ans: Transverse, Sagittal, Coronal




Conventional Tomography is also called? and why?

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Ans: Axial Tomography: the plane of the image is parallel with the long

axis of the body




Type of image planes done with conventional tomography?


Ans: Sagittal and coronal plane




Types of image planes done on CT?


Ans: Transaxial (through Axial) and transverse




In CT, the internal structures of the body attenuate the x-ray

according to


Ans: mass density of tissues and effective atomic number




Projection formation


Ans: the detector makes a single sweep across the patient




Translation

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Ans: a single complete rotation of source-detector assembly




1st Generation CT


Ans: Single Detector, A pencil beam x-ray, 5 min to image time




2nd Generation CT


Ans: translate-rotate system, multiple detectors, a fan shaped X-ray

beam, bow-tie filter reduce and conform to patient's body, 30 seconds to

image time




3rd Generation CT


Ans: source-detector unit rotates around the patient, rotate only system,

less than 1 second image time, curvilinear detector array for better image

quality, ring artifacts caused by false detector bank




4th Generation CT