Category: S

A radiation dose to the skin including secondary radiation from backscatter. The skin dose, also known as the surface dose, represents the amount of radiation received by the skin surface. In the context of conventional x-ray therapy units, it comprises the cumulative value of the air dose at the specific location along with the contribution…

In radiography, the distance from the x-ray tube to the radiographical film or the image digitizer.  

In radiologic sciences, the distance from a radiation source to a patient’s skin.  

The distance between a source of radiation and the object that it images or radiates.  

In surgical procedures, gaining access to tissues by incising them with some sort of sharp instrument, such as a scalpel.  

One of several operations used for staging and treatment of neck cancers. In the most commonly used approach, the tissues above the omohyoid, including the submandibular gland and lymphatics, are removed.  

In aerospace medicine, a term used to describe a variety of incidents occurring in flight, when the pilot fails to sense correctly the position, motion, or attitude of the aircraft or himself or herself within the coordinate system provided by the surface of the earth and gravitation.  

A dislocation with the head of the humerus resting below the spine of the scapula and medial to the acromion process.  

Separation of the calcaneum and the scaphoid from the talus.  

A disease in which symptoms are less pronounced but more prolonged than in an acute disease; this type is intermediate between acute and chronic disease.