A new extensive class of one-dimensional binary sequences, called extended pseudorandom sequences, is proposed which enables a radiation-physics experiment to be optimized more completely and enables problems of planar emission tomography to be solved effectively using integral-code measuring systems.

Extended pseudorandom sequences and two-dimensional coding collimators based on them

A recently proposed new large class of one-dimensional binary sequences, called extended pseudorandom sequences, is investigated. It is shown that they enable one, in practice, to optimize a radiation-physical experiment and to solve problems of emission planar tomography more effectively using integral-code measurement systems.

Optimization of integral-code measuring systems for planar tomography constructed using extended pseudorandom sequences

A new extensive class of one-dimensional ternary (−1, 0, +1)-sequences, called extended ternary sequences, is proposed, which enables radiation-physics experiments to be more completely optimized and enables problems of emission planar tomography to be solved more effectively using code-based integrated measurement systems.

Extended ternary sequences and two-dimensional coding collimators based on them

There are described the focal plane method and the back projection algorithm in multiplexed measurement systems with coded apertures for a reconstruction of spatial distributions of radiation sources. This method can be used in multiplexed measurement systems with both rectangular and hexagonal coded apertures.

Back projection technique for multiplex measurement systems with coded apertures

Computerized emission tomography is an effective method for the diagnosis of pathological states in the human body. A new emission tomography approach was developed involving the use of multiplexed measurement systems (MMS). An iterative algorithm implementing the back projection method for emission tomography based on MMS was developed using hexagonal coding collimators. Numerical modeling demonstrated the validity of the proposed method.

A Back Projection Method for Hexagonal Coding Collimators in Emission Tomography with Multiplexed Measurement Systems

Two iterative algorithms are considered for reconstructing three-dimensional radiation source distributions in an integral code measurement system. Those algorithms are found to be viable in the focal-plane method and also that there is substantial advantage in the directional discrepancy method by comparison with the steepest-descent method for coding collimators with low radiation transmission.

Integral Code Systems for Recording Ionizing Radiation: Iterative Image Reconstruction Algorithms for Focal Plane Processing

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Integral Code Systems for Recording Ionizing Radiation: Iterative Image Reconstruction Algorithms for Focal Plane Processing