X-ray or gamma ray systems or devices – Beam control – Filter
Reexamination Certificate
2006-11-07
2006-11-07
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Beam control
Filter
C378S038000
Reexamination Certificate
active
07133496
ABSTRACT:
An apparatus for use in a cephalostat has a collimator for defining the shape of an X-ray beam and a soft tissue filter screen, mounted independently of the collimator, for attenuating a portion of the X-ray beam. The soft tissue filter screen has an anterior facial portion and a submental-neck portion having a leading edge at a position posterior relative to the leading edge of the anterior facial portion. The soft tissue filter screen is independently adjustable relative to the collimator. A cephalometric radiology apparatus includes a support structure, an X-ray source, and an X-ray detector, in addition to the collimator and the soft tissue filter screen. A method for imaging soft tissue and hard tissue involves positioning the soft tissue filter independently of positioning the collimator. A modular system, which can be mounted onto a cephalostat, includes the soft tissue filter screen and a mounting component.
REFERENCES:
patent: 3819937 (1974-06-01), Sovijarvi et al.
patent: 4082957 (1978-04-01), Morlan
patent: 4163902 (1979-08-01), Musaph
patent: 4641336 (1987-02-01), Gastrin
patent: 5016264 (1991-05-01), Hyttinen
patent: 5425065 (1995-06-01), Jarvenin
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Soft tissue filter screen for the Wehmer collimator first used circa 1984, illustrated in Figure 1 attached.
Soft tissue filter x-ray cassette adaptor publicly available since 1976, illustrated in Figure 2 attached.
TP Laboratories soft tissue face shield on sale as of 1979, illustrated in Figure 3 attached.
Brochure from Instrumentation Imaging, Inc., Title of the brochure is Orthopantomograph OP 100 Advanced Dental Imaging, 1998, pertinent page is p. 6, Instrumentarium Corp. Imaging Division, Tuusula, Finland.
David G. Wilson, D.M.D., LLC
Glick Edward J.
RatnerPrestia
Thomas Courtney
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