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Tag: radiation dose limits

Radiation Dose in Modern Diagnostic Radiology

radiation dose control

Over the past several decades, the use of ionizing radiation in medical imaging has increased dramatically. This has resulted in a substantial increase in the radiation dose humans are exposed to. In 1950, approximately 25 million radiographic and fluoroscopic exams were performed. This number skyrocketed to nearly 300 million by the mid-2000s. In the 1980s, only 15 percent of all artificial radiation exposure was on account of medical imaging; by the mid-2000s, this figure had risen to almost 50 percent.

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Patient Radiation Dose Measurement in Fluoroscopy and CT Examinations

Fluoroscopy and patient radiation dose

Radiation dose represents the energy deposited per unit mass of tissue. It is typically measured in Gray (Joules/kg). This deposition of energy may cause damage the tissues, and therefore, patient radiation dose must be measured and monitored. Patients are exposed to some of the largest doses of radiation during fluoroscopically-guided procedures and computed tomography examinations. Radiologic technologists play a key role in limiting this dose, based on the ALARA principle, by using the correct imaging techniques.

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