Off-focal radiation limiting precollimator and adjustable ring c

Details Off-focal radiation limiting precollimator and adjustable ring c Off-focal radiation limiting precollimator and adjustable ring c

1994-09-06

1996-02-20

Hannaher, Constantine

X-ray or gamma ray systems or devices

Beam control

Collimator

378 4, 378148, 378150, G21K 102

Patent

active

054935997

ABSTRACT:
A toroidal x-ray tube (I) is supported and selectively positioned by a gantry (II). The x-ray tube includes a toroidal housing (A) in which a rotor (20) is rotatably mounted. One or more cathodes (C) are mounted on the rotor for generating an electron beam which strikes an anode (B) to generate a beam of x-rays which pass through a patient aperture (62) to strike a detector (60). The x-ray tube includes pre-collimators (70, 74) having slots (72, 76) for passage of the x-ray subsequent to generation thereof and prior to being collimated by the collimator (90). A ring collimator (90) collimates an x-rays formed into a fan shaped beam. The collimator (90) includes a first ring (92) and a second ring (94) which are concentric. The distance between the first and second rings (92, 94) is adjustable to adjust the slice thickness of the final image. The x-ray tube provides improved final images in that reduction of off-focal radiation occurs due to the utilization of pre-collimators and the collimation of x-rays is flexible due to adjustability of slice thickness.

REFERENCES:
patent: 4122346 (1978-10-01), Enge
patent: 4135095 (1979-01-01), Watanabe
patent: 4227088 (1980-10-01), Maydan et al.
patent: 4300051 (1981-11-01), Little
patent: 4368535 (1983-01-01), Baumann
patent: 4521900 (1985-06-01), Rand
patent: 5125012 (1992-06-01), Schittenhelm
patent: 5179583 (1993-01-01), Oikawa
patent: 5191600 (1993-03-01), Vincent et al.
patent: 5200985 (1993-04-01), Miller
patent: 5241577 (1993-08-01), Burke et al.
patent: 5305363 (1994-04-01), Burke et al.

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