Basic Principles of CT Imaging



CT uses X-rays to generate cross-sectional, two-dimensional images of the body. Images are acquired by rapid rotation of the X-ray tube 360° around the patient. The transmitted radiation is then measured by a ring of sensitive radiation detectors located on the gantry around the patient. The final image is generated from these measurements utilizing the basic principle that the internal structure of the body can be reconstructed from multiple X-ray projections.


Aortic Disease Transmitted Radiation Rapid Rotation Lead Apron Gray Shadow 

For Further Reading

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    Goldman LW. Principles of CT: multislice CT. J Nucl Med Technol. 2008;36:57–68.PubMedCrossRefGoogle Scholar
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    Hendee WR. Cross sectional medical imaging: a history. Radiographics. 1989;9(6):1155–80.PubMedCrossRefGoogle Scholar
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    Hounsfield GN. Computed medical imaging. Med Phys. 1980;7:277–82.CrossRefGoogle Scholar
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    Ledley RS, Wilson JB, Golab T, Rotolo LS. The ACTA scanner: the whole body computerized transaxial tomograph. Comput Biol Med. 1974;4:145–55.PubMedCrossRefGoogle Scholar

Copyright information

© Springer India 2015

Authors and Affiliations

  1. 1.Nuclear MedicineUtkal Institute of Medical SciencesBhubaneswarIndia

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