US 11,754,731 B2
Gamma-ray imaging
David Boardman, Lucas Heights (AU); Adam Sarbutt, Lucas Heights (AU); Alison Flynn, Lucas Heights (AU); and Dale Prokopovich, Lucas Heights (AU)
Assigned to Australian Nuclear Science and Technology Organisation, Lucas Heights (AU)
Filed by Australian Nuclear Science and Technology Organisation, Lucas Heights (AU)
Filed on May 27, 2022, as Appl. No. 17/827,321.
Application 17/827,321 is a continuation of application No. 17/015,839, filed on Sep. 9, 2020, granted, now 11,346,964.
Application 17/015,839 is a continuation of application No. 15/313,101, granted, now 10,795,036, issued on Oct. 6, 2020, previously published as PCT/AU2015/000302, filed on May 22, 2015.
Claims priority of application No. 2014901905 (AU), filed on May 22, 2014.
Prior Publication US 2022/0308244 A1, Sep. 29, 2022
Int. Cl. G01T 1/29 (2006.01); G21K 1/02 (2006.01); G01T 1/161 (2006.01); G01T 1/167 (2006.01); G01V 5/00 (2006.01); G21K 1/10 (2006.01)
CPC G01T 1/295 (2013.01) [G01T 1/161 (2013.01); G01T 1/167 (2013.01); G01V 5/0016 (2013.01); G21K 1/02 (2013.01); G21K 1/10 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A coded mask for use in compressed sensing measurements of incoming radiation, the mask comprising:
a mask pattern comprising a plurality of open mask elements and a plurality of closed mask elements;
wherein the closed mask elements are of at least one material that modulates the intensity of the incoming radiation; and
the open mask elements allow a higher transmission of the radiation relative to the closed mask elements, the higher transmission being sufficient to allow reconstruction of an image from the compressed sensing measurements;
wherein the mask is configured to, in use, mask a radiation sensor at a location within or behind the mask;
the open mask elements are defined by mask apertures oriented towards the location of the sensor; and
in the case where the mask is a sphere, a part of a sphere, a segment of a sphere or a segment of a sphere between two planes, and the location of the sensor is at the center of the sphere, the apertures are tapered and are defined by one or more surfaces aligned with a direction of the sensor.