Computed tomography quality control

  • Reference books

    The ultimate goal of QA is to improve patient care.
    Quality Control (QC) refers to the specific test required to ensure effective and safe equipment performance.
    QC tests check the performance of the equipment under routine clinical conditions, following established protocols for facilities, equipment and procedures..

  • What determines CT resolution?

    Spatial resolution at CT depends on several factors including x-ray focal spot size, number of projection views per rotation of the x-ray tube, detector cell size, and reconstruction algorithms..

  • What is CT image quality?

    Image quality in CT is determined by whether the images produced are a true representation of the attenuation values of the x-ray beam by the body tissue as displayed on the CT image.
    Image quality is the accurate reproduction of fine detail (SR) and small differences in attenuation (CR) in the image..

  • What is image quality in computed tomography?

    Image quality in CT is determined by whether the images produced are a true representation of the attenuation values of the x-ray beam by the body tissue as displayed on the CT image.
    Image quality is the accurate reproduction of fine detail (SR) and small differences in attenuation (CR) in the image..

  • Why is image quality important in CT?

    Evaluation of image quality (IQ) in Computed Tomography (CT) is important to ensure that diagnostic questions are correctly answered, whilst keeping radiation dose to the patient as low as is reasonably possible..

  • Why is QA important in CT scan?

    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.
    Quality assurance testing is done for the safety of both patients and staff..

  • Contrast in CT images can be controlled by the window level and window width settings used to display the image.
    These settings dictate how the actual measurements of tissue attenuation are translated into a gray-scale image.
  • The image quality is mainly determined by 3 factors: Resolution.
    Noise.
    Contrast.
Description. This publication presents a harmonized approach to quality assurance in the field of computed tomography applied to both diagnostics and therapy.
Past events related to excessive CT dose that have been reported in the lay media point to the critical need for ongoing QC and careful attention to dose and image quality. Routine QC can help ensure the equipment is operating appropriately so that dose is optimized for the necessary image quality.
Possible parameters are: water and air values, pixel noise/contrast resolution, spatial resolution, artifacts, homogeneity, contrast scale/tube voltage, slice 
This publication presents a harmonized approach to quality assurance in the field of computed tomography applied to both diagnostics and therapy. Google BooksOriginally published: 2012

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