Abstract

A radiation imaging system images a distributed source of radiation from an unknown direction by rotating a scatter mask around a central axis. The scatter mask has a pixelated outer surface of tangentially oriented, flat geometric surfaces that are spherically varying in radial dimension that corresponds to a discrete amount of attenuation. Rotation position of the scatter mask is tracked as a function of time. Radiation counts from gamma and/or neutron radiation are received from at least one radiation detector that is positioned at or near the central axis. A rotation-angle dependent detector response curve (DRC) is generated based on the received radiation counts. A reconstruction algorithm for distributed radiation source(s) and/or localized source(s) are applied based on the tracked rotation position and prior characterization of the detector response for a given scatter mask. A two-dimensional image with relative orientation and source distribution is generated from the measured DRC

Document Type

Patent

Status

Issued

Issue Date

6-29-2021

Patent Number

US 11047997 B2 [11,047,997]

CPC Classification

A61B6/4241

Application number

17/007063

Assignees

Government of the United States, as represented by the Secretary of the Air Force, Wright-Patterson AFB, OH (US)

Filing Date

8-31-2020

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