Apparatus and method for image reconstruction for a synthetic aperture gamma ray imager

US7663105B2 · kind B2 · utility

Assignee

• Morpho Detection, LLC · US

Inventors

• Ralph Thomas Hoctor · Saratoga Springs, US
• Scott Stephen Zelakiewicz · Niskayuna, US
• Evren Asma · Vernon Hills, US
• Jeffrey Seymour Gordon · Niskayuna, US
• Floribertus P. M. Heukensfeldt Jansen · Ballston Lake, US

Key dates

• Filing date: Dec 10, 2008
• Grant date: Feb 16, 2010
• Expiry date: Dec 10, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B42/02
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An imaging system includes a platform having mounted thereon a coded-aperture imaging device and positioned to receive radiation over a baseline. The imaging system includes a computer configured to acquire a plurality of far-field datasets over the baseline, the plurality of far-field datasets comprising data received via the coded-aperture imaging device. The computer is also configured to form a preliminary image based on the acquired plurality of far-field datasets, and apply an expectation maximization (EM) algorithm to the preliminary image; wherein the EM algorithm includes an ordered subset algorithm.