| 摘要 |
Method and arrangement for implementing a system ( 10 ) for providing multi-angular SPECT radiation sampling utilizing slant-angle collimation. The system ( 10 ) includes a collimator ( 13 ) positioned between a radiating mass ( 19 ) within a patient ( 60 ) and a radiation detector ( 21 ). The collimator ( 13 ) is spaced apart from a translational path ( 25 ) of the radiating mass ( 19 ) at a predefined distance ( 24 ). A plurality of apertures ( 27 ) extend through the collimator ( 13 ) and each forms a passageway ( 28 ) for radiation rays ( 20 ) emanating from the radiating mass ( 19 ) in a direction substantially aligned with a longitudinal axis ( 29 ) of the respective passageway ( 29 ) and in this manner enables the aligned radiation rays ( 20 ) to strike the radiation detector ( 21 ). The plurality of passageways ( 28 ) include a first group ( 30 ) of passageways adjacently aligned in a first row ( 32 ) and arranged so that the longitudinal axes ( 29 ) of the first group ( 30 ) of passageways ( 32 ) are substantially contained in a first plane ( 34 ) oriented substantially perpendicularly to a central plane ( 16 ) of the collimator ( 13 ). Each of the parallel longitudinal axes ( 29 ) of the first row ( 32 ) of passageways are obliquely oriented with respect to the central plane ( 16 ) of the collimator ( 13 ) with an included angle ( 36 ) therebetween. Each of the included angles, when measured clockwise from the central plane ( 16 ) or face of the collimator ( 13 ) to a respective longitudinal axis, is an acute angle.
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