Radiation modulator

Details Radiation modulator Radiation modulator

2008-07-15

2008-07-15

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Optical modulator

C378S065000

Reexamination Certificate

active

07400434

ABSTRACT:
A radiation beam modulator (1; 500; 600) that can be employed for modulating a radiation beam (60) in a radiation system. The modulator (1; 500; 600) comprises a bath (590; 690) containing a radiation attenuating fluid (520; 620) and multiple low radiation attenuating bars (570; 670) immersed in the fluid (520; 620) to form an array of multiple columns (525; 625). A height adjuster (530; 630) is arranged for adjusting a respective level of immersion of the bars (570; 670) in the fluid (520; 620) thereby to adjust the heights of the fluid columns (525; 625) such that the columns (525; 625) collectively form a radiation beam modulating profile.

REFERENCES:
patent: 5596619 (1997-01-01), Carol
patent: 5802136 (1998-09-01), Carol
Xu et al., “Reshapable physical modulator for intensity modulated radiation therapy”, Am. Assoc. Phys. Med., vol. 29, No. 10, Oct. 2002, pp. 2222-2229.
T. Watanabe and H. Kuwano, “A microwave matrix using piezoelectric actuators”, Microsystems Technologies, 1997, pp. 107-111.

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