A lesion is any abnormal damage or change in the tissue of an organism, usually caused by disease or trauma. Lesion is derived from the Latin word laesio meaning injury. Lesions may occur in plants as well as animals.
These first six months are known as the length-of-stay demonstration period. After maintaining a Medicare ALOS of 25 days for six months, Landmark Hospital applies to CMS for a change in provider status and receives a LTAC-hospital Medicare provider number.
Normally, neutron therapy patients receive 12 treatments over a period of three to four weeks, compared with 30 to 40 photon treatments over six to eight weeks. Linac operation must be a dependable constant for patients to receive scheduled treatments without interruption.