Radiation Dose and Imaging Protocols
It is appropriate that the first section of this text should address the radiation dose because the risk of radiation exposure is a stochastic risk that may be analyzed statistically but may not be predicted precisely. Therefore, every time a CT scan is ordered and performed, we must remember there is risk to the patient, and we should only perform CT when the risk-benefit ratio supports the exam. In the past CT looked to obtain the most beautiful images with little regard for radiation dose. More recently the pendulum has swung in the opposite direction with radiologists looking to make the dose as low as possible to obtain diagnostic images.
KeywordsRadiation dose Computed tomography dose index (CTDI) Dose length product (DLP) Weighted CTDI (CTDIw) Volume CTDI (CTDIv)
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