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[Dosimetry with Imatron]

B Aubert1

  • 1Institut Gustave-Roussy, Service de Physique, Villejuif.

Journal De Radiologie
|December 1, 1994
PubMed
Summary
This summary is machine-generated.

This study measured radiation doses from the Imatron, a unique CT scanner. Doses varied by scan type, with head scans receiving the highest radiation exposure, while cardiac scans had the lowest.

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Area of Science:

  • Medical Physics
  • Radiological Imaging
  • Radiation Dosimetry

Background:

  • Conventional CT scanners and the Imatron utilize different technologies, but share comparable physical principles.
  • Understanding radiation dose is crucial for patient safety in all medical imaging procedures.

Purpose of the Study:

  • To quantify the radiation doses delivered by the Imatron using thermoluminescent dosimeters.
  • To compare surface and slice doses across different scanning protocols on the Imatron.

Main Methods:

  • Dosimetric studies were conducted using small thermoluminescent dosimeters.
  • Measurements were performed for four specific scanning protocols on the Imatron.

Main Results:

  • Surface doses ranged from 0.7 to 15.7 centiGray (cGy).

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  • Doses at the surface of the slice ranged from 0.1 to 7.2 cGy.
  • Cardiac exams, the intended use, showed the weakest doses, while head scans exhibited the highest.

    • Conclusions:

    • The Imatron delivers variable radiation doses depending on the protocol.
    • Head region scans result in the highest radiation exposure from the Imatron.
    • Radiation dose optimization for specific protocols may be necessary.