Biomaterial Database

Spherical lead shields for megavoltage teletherapy. 1978

R A Morrison

A new method of manufacturing individualized, focused lead shields for megavoltage teletherapy is described. Computerized film dosimetry demonstrated that in contrast to nonfocused shields, the new focused shields exhibit good maintenance of penumbra width as the distance between the edge of the beam and the central axis is increased.

UI	MeSH Term	Description	Entries
D011835	Radiation Protection	Methods and practices adopted to protect against RADIATION.	Protection, Radiation
D011867	Radioisotope Teletherapy	A type of high-energy radiotherapy using a beam of gamma-radiation produced by a radioisotope source encapsulated within a teletherapy unit.	Teleradioisotope Therapy,Teletherapy, Radioisotope,Therapy, Teleradioisotope
D011882	Radiotherapy, High-Energy	Radiotherapy using high-energy (megavolt or higher) ionizing radiation. Types of radiation include gamma rays, produced by a radioisotope within a teletherapy unit; x-rays, electrons, protons, alpha particles (helium ions) and heavy charged ions, produced by particle acceleration; and neutrons and pi-mesons (pions), produced as secondary particles following bombardment of a target with a primary particle.	Megavolt Radiotherapy,High-Energy Radiotherapy,Radiotherapy, Megavolt,High Energy Radiotherapy,Radiotherapy, High Energy
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man