Acr computed tomography quality control manual

  • What is the importance of quality control in CT scan?

    Computed Tomography (CT) plays an important role in diagnosis and localization.
    The increase in access to CT and the need for safe use and high-quality performance requires the establishment and implementation of effective quality control.
    Poor quality imaging can result in unnecessary radiation exposure..

  • Quality assurance measurements ensure that the machine generates just as much X-ray as needed to keep radiation exposure as low as possible to achieve good quality imaging and avoid repeated procedures.
  • The uniformity (the deviation in mean CT-number between central and peripheral regions) must not be greater than 4 HU at acceptance [3], [4].
    In addition, the difference in uniformity should not vary by more than 2 HU from baseline values [4].
The purpose of the ACR QC manual is to help guide facilities in establishing and maintaining an effective CT quality control program and to provide a reasonably uniform approach to testing.

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