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I doser 2018 doses download8/10/2023 However, despite the clear evidence that CT provides invaluable information for diagnosis and patient management, a potential risk of radiation-induced malignancy exists. It is estimated that 67 million CT examinations were performed in 2006 in the USA, up from 3 million in 1980. It is because of this tremendous value of CT that its use is now pervasive in modern medical practice. CT imaging also plays a major role in the staging, treatment planning and follow-up of cancer. With its fast scanning speed and isotropic spatial resolution at 0.3–0.4 mm, CT allows physicians to diagnose injuries and disease more quickly, safely and accurately than alternative more invasive or less sensitive imaging techniques. Subsequent to the introduction of helical scanning technique in the late 1980s and the advent of multidetector-row technology in the late 1990s, the number and impact of clinical applications of CT have continued to grow. Since its introduction in 1973, x-ray computed tomography (CT) has established itself as a primary diagnostic imaging modality.
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