Appeal No. 2004-0586
Application No. 09/710,395
side distinct portions to enable collimation for emission
radiation only. This is said to increase the intensity of
transmission radiation received by the uncollimated half of the
head. The arrangement is also said to achieve more precise
physical and temporal alignment of the two images in order to
produce a single combined image which shows not only the
radioisotope distribution, but also the surrounding anatomical
structure. This is brought about by generating both data sets
concurrently without moving the patient between the two
collections.
Representative independent claim 28 is reproduced as
follows:
28. A gamma camera comprising:
a detector head having a radiation receiving face that is
segmented into side-by-side first and second portions;
a radioisotope transmission radiation source disposed across
an examination region from the first portion of the radiation
receiving face;
a drive for moving the detector head and the radiation
source around the examination region;
a SPECT collimator mounted to the second portion of the
radiation receiving face; and
one of an axial filter, a transmission radiation collimator,
and no collimator covering the first portion of the radiation
receiving face.
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