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  • Shields designed to block or attenuate the radiation beam during radiotherapy procedures (also known as radiotherapy block shields or shielding blocks). These shields may consist of pre-shaped lead blocks or custom-made devices created using a low-melting-point alloy (i.e., one that melts at less than 100 degrees Celsius [212 degrees Fahrenheit]) in the casting procedure. These low-melting-point alloys are also known as Cerrobend and Lipowitz\'s alloys. Radiotherapy block shields have a shape that permits the performance of the radiotherapy procedure on the target tissues while shielding unwanted radiation in order to avoid damage to healthy tissues. They are used in radiotherapy areas in healthcare facilities. Other alloys (e.g., tungsten based) are also used to make radiotherapy block shields.
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