Beamforming for tomographic detection systems
a beamforming and tomographic detection technology, applied in the field of beamforming, can solve the problem that one cannot identify the exact location of positron emission
Inactive Publication Date: 2019-10-03
INT BUSINESS MASCH CORP
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Benefits of technology
The present invention provides a method and system for beamforming datasets from a tomographic detection system. This involves receiving a tomographic dataset for each detector pair and combining the datasets by weighting them according to beamforming weights based on the detector pair coordinates and the coordinates of the point of interest. This results in a signal that is focused on the point of interest. The technical effect is improved signal-to-noise ratio and more accurate detection of radiation hits.
Problems solved by technology
Unfortunately, one cannot identify the exact location of positron emissions.
Method used
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[0028]The following description is structured as follows. First, general embodiments and high-level variants are described (sect. 1). The next sections address more specific embodiments and technical implementation details (sect. 2 and 3).
1. General Embodiments and High-Level Variants
[0029]In reference to FIGS. 6A-6B, 10, aspects of the invention are now described, which concerns both a method of beamforming datasets from a tomographic detection system 1 and the detection system 1 itself.
[0030]The system 1 is assumed to comprise scintillation detectors 12 arranged in D detector pairs, where D≥1, as illustrated in FIGS. 6A-6B. Each of the detectors is adapted to count radiation hits. Such detectors are known per se. Altogether, they form a detection unit 10. The tomographic detection system may for example be configured as a positron emission tomography (PET) detection system, an X-ray computed tomography scan (CT scan) system or an ultrasound tomography detection system. The system ...
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A method of beamforming datasets from a tomographic detection system. The system comprises scintillation detectors that are arranged in D detector pairs, D≥1, wherein the detectors are adapted to count radiation hits. According to the method in one aspect, a tomographic dataset is received for each detector pair coordinates (θd, pd) of a detector pair d of the D detector pairs, so as to obtain a plurality of tomographic datasets. Each of said datasets is associated with respective detector pair coordinates (θd, pd). Then, for each point y of interest, the received datasets are coherently combined by weighting the datasets according to respective beamforming weights d(y)=ω(θd, pd; y), based on said respective detector pair coordinates (θd, pd) and coordinates of said each pointy of interest. This way, a signal focusing on said each pointy is obtained. Related tomographic detection systems and computer program products may be also presented.
Description
BACKGROUND[0001]The present disclosure relates in general to the field of tomographic detection methods and signal reconstructions methods, as well as to related detection systems. In particular, it is directed to methods that coherently combine detection signals thanks to beamforming weights judiciously adapted to the context of tomography, to obtain signals focusing on points of interest.[0002]Focused beamformers have been extensively used in phased-array signal processing, leading to simple and efficient imaging procedures, with high sensitivity and resolution. Such beamformers coherently combine networks of antennas to achieve a radiation pattern, also called array beamshape, with high directivity. This beamshape acts as a Dirac-like spatial filter, which makes it possible to scan the incoming signal for particular locations. This imaging procedure is called imaging by beamforming (or B-scan) and is used in several applications of phased-array signal processing, which include ra...
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IPC IPC(8): G06T11/00G16H30/20G01T1/10
CPCG16H30/20G06T11/006G01T1/10G01T1/2985G16H40/63
Inventor SIMEONI, MATTHIEUHURLEY, PAULROQUETTE, LUCIENKASHANI, SEPAND
Owner INT BUSINESS MASCH CORP