Ionizing Radiation in Medical Diagnosis and Treatment
Overview: “The dose makes the poison,” Paracelsus said some 500 years ago. Paracelsus was a 16th century Renaissance physician who is often credited as the father of toxicology. A doctor’s duty is to diagnose and treat but, if mishandled; the treatment can often do as much damage as the disease. Nowhere is this truer than in the field of ionizing radiation, particularly in medical procedures that use of x-rays, as in computed tomography (CT) scans, or in interventional procedures such as cardiac catheterization for angioplasty. What happens if a patient receives a very high dose of radiation during a radiological procedure? There are two general types of risks he/she might face the first one is readily visible and the symptoms can come relatively early, such as skin reddening, or erythematic and hair loss. The second effect might manifest itself slowly and take years to appear, such as an increased risk of cancer. Radiation effects on skin have been reported primarily in patients unde...