Anti-scatter collimator for radiation imaging modalities

An anti-scatter collimator comprising:

• a first layer defining a first retaining member at a first surface, wherein the first layer has a first attenuation coefficient;
• a second layer defining a second retaining member at a first surface that faces the first surface of the first layer, wherein the second layer has a second attenuation coefficient;
• and
• a plurality of septa disposed between the first layer and the second layer and physically contacting the first retaining member and the second retaining member, wherein:
• the first retaining member and the second retaining member maintain a position of each of the plurality of septa relative to the first layer and the second layer, and
• a pitch between a first septum of the plurality of septa and a second septum of the plurality of septa near the first layer is different than a second pitch between the first septum and the second septum of the plurality of septa near the second layer.

A computed tomography (CT) imaging modality, comprising:

• a radiation source configured to emit radiation;
• a detector array configured to detect at least a portion of the radiation;
• and
• an anti-scatter collimator disposed between the radiation source and the detector array, the anti-scatter collimator comprising:
• a first layer defining a first retaining member at a first surface, wherein the first layer has a first attenuation coefficient;
• a second layer defining a second retaining member at a first surface that faces the first surface of the first layer, wherein the second layer has a second attenuation coefficient;
• a septum disposed between the first layer and the second layer and physically contacting the first retaining member and the second retaining member, wherein:
• the first retaining member and the second retaining member maintain a position of the septum relative to the first layer and the second layer, and
• the septum has a third attenuation coefficient that is greater than the first attenuation coefficient and the second attenuation coefficient;
• and
• an end support attached to the first layer and to the second layer, wherein the end support borders an end of the septum.