Yawning redirects here. For the fish species, see Yawning (fish) . A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath.Yawning (oscitation) most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality. yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath. Yawning (oscitation) most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality.
A radiological emergency is an emergency in which there is, or is perceived to be, a hazard due to radiation exposure from a source. As sources of radiation are used in various fields, including industry, medicine and research, radiological emergencies may occur anywhere. These are examples of radiological emergency situations and associated conditions that a first responder may face: 1  Medical Symptoms of Radiation Exposure. 2  Loss or Theft of Dangerous Radioactive Source. 3  Public Radioactive Contamination/Exposure.
Radiological exams are absolute necessities in the medical evaluation of any patient and the radiologist is the one that interprets these after ensuring the are made to the highest levels of quality and standards. All radiologists are well trained in the expert use of the various radiological modalities and equipment.These include MRI (magnetic Resonance Imaging), ultrasound (Diagnostic sonography), interventional radiology, fluoroscopy, digital radiography, angiography, nuclear medicine, mammography, and computed tomography.he radiologist is also trained in nuclear medicine and uses that to look into pulmonary embolism, heart disease, signs of stroke, obstructed gall bladder, spread of cancer, bone density, and kidney function among many others.