Mammography X-ray homogenizing optic

Details Mammography X-ray homogenizing optic Mammography X-ray homogenizing optic

2011-01-25

2011-01-25

Glick, Edward J (Department: 2882)

X-ray or gamma ray systems or devices

Source

Electron tube

C378S143000

Reexamination Certificate

active

07876883

ABSTRACT:
A conical anode X-ray source with a spot size approximately one tenth of the size of existing mammography devices. The source produces the same or higher radiance than the prior art. It also produces almost no high-energy Bremstrahlung. The electron beam is directed into a conical anode so that it strikes the reflecting surface at an angle which produces total internal reflection. The X-rays emitted via the reflection would ordinarily exit the small end of the conical anode in a diverging conical pattern—producing an undesirable “ring” configuration at the image plane. A homogenizing optic is therefore preferably added to the small end of the conical anode. The homogenizing optic is sized to reflect the X-rays emerging from the conical anode and thereby create a uniform “spot” source at the far end of the homogenizing optic.

REFERENCES:
patent: 1596405 (1926-08-01), Dechend
patent: 2677069 (1954-04-01), Bachman
patent: 3584219 (1971-06-01), Herglotz et al.
patent: 5157704 (1992-10-01), Harding
patent: 5828505 (1998-10-01), Farmiga
patent: 6993115 (2006-01-01), McGuire et al.
patent: 2005/0135766 (2005-06-01), Cianciotto et al.
patent: 2007/0242924 (2007-10-01), Cianciotto et al.

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