Biomaterial Database

Definition of source for head shielding requirements in linear accelerators may affect room shielding design. 1980

M W Herman, and A E Dockter, and J E Scallon

Siemens Corporation defines the source of the Mevatron 20 linear accelerator as a line source approximately 2 m in length. Calculations for secondary barriers for leakage radiation are generally based on 0.1% of the useful beam 1 m from the target. The difference in source terms can lead to calculating thinner barriers than are required. The placement of a 30 X 10 X 10-cm block of lead behind the head was required to achieve acceptable radiation levels.

UI	MeSH Term	Description	Entries
D010315	Particle Accelerators	Devices which accelerate electrically charged atomic or subatomic particles, such as electrons, protons or ions, to high velocities so they have high kinetic energy.	Betatrons,Linear Accelerators,Accelerator, Linear,Accelerator, Particle,Accelerators, Linear,Accelerators, Particle,Betatron,Linear Accelerator,Particle Accelerator
D011835	Radiation Protection	Methods and practices adopted to protect against RADIATION.	Protection, Radiation
D011872	Radiology Department, Hospital	Hospital department which is responsible for the administration and provision of x-ray diagnostic and therapeutic services.	Hospital Radiology Department,X-Ray Departments,Department, Hospital Radiology,Department, X-Ray,Departments, Hospital Radiology,Departments, X-Ray,Radiology Departments, Hospital,X-Ray Department,Department, X Ray,Departments, X Ray,Hospital Radiology Departments,X Ray Department,X Ray Departments
D002140	California	State bounded on the east by Nevada and Arizona, on the south by Mexico and the Pacific Ocean on the south and west, and on the north by Oregon.
D006257	Head	The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.	Heads
D006744	Hospital Bed Capacity, 100 to 299
D006748	Hospital Departments	Major administrative divisions of the hospital.	Departments, Hospital,Department, Hospital,Hospital Department
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man