Computed tomography mistakes

  • What can mess up a CT scan?

    Metal objects including jewelry, eyeglasses, dentures and hairpins may affect the CT images and should be left at home or removed prior to your exam.
    You may also be asked to remove hearing aids and removable dental work..

  • A CT scan can be wrong: it can't tell the difference between cancerous tissue and non-cancerous tissue.
    CT scans can be misread or misinterpreted.
    Imaging tests usually can't tell if a change has been caused by cancer.
    CT scans can produce false negatives and false positives.
  • It often shows beam hardening artifacts.
    If the sample is too lightly absorbing for the X-ray energy used to scan it, the projection images will be all bright, and the CT image will be dark with little-to-no contrast.
    Therefore, this problem is caused by a mismatch of the sample absorption rate and the X-ray energy.
Feb 1, 2016Researchers at FAU's Pattern Recognition Lab have now developed a new algorithm to reduce the occurrence of these errors, known as motionĀ 
Most of these arise during image interpretation but, differently from other radiological techniques, the awareness of radiologists regarding technical CT aspects and pathologies substantially contribute in generating errors, in particular because CT technology expands rapidly and radiologists do not routinely receive


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