Gamma imaging probe position signal processing method

Abstract

The present invention based on not changing hardware design, which means that each imaging detector keep independent considerations, the weighted value of the circuit to be pushed back the weight of the original signal, and then estimate the amount of the original signal in a virtual cascade circuit to renew weighted signal; this estimation process through simplification, only simple addition and multiplication calculations on real numbers need to be implemented. Advantage of the present invention is that the signal data through a simple operation will complete the estimate. Executing the estimate in hardware without increasing storage capacity of the rear-end list mode data, and also to achieve a continuous and effective imaging area to expand and enhance the probe's sensitivity and keep a higher signal to noise ratio (S / N ratio).

Description

FIELD OF THE INVENTION[0001]The present invention relates to a gamma imaging probe position signal processing method, more particularly, to a gamma imaging probe position signal processing method for correctly retaining the information of position of the signal of the event occurred in a signal sharing area of two adjacent image detector, so as to avoid the problem of large area of image being separated discontinuously.BACKGROUND OF THE INVENTION[0002]In design, the gamma imaging probe is made of scintillator array coupled to photo multipliers or array, which is in an application of pixelated in operation, and with dedicated read-out circuit, to obtain the position of X, Y and the intensity E of the signal in the image detector.[0003]A practical imaging probe should be capable of detecting the entire area of the object being detected. However, because of the size of a single photo multiplier, the area is therefore limited. To overcome such constraints, a plurality of imaging detecto...

AI Technical Summary

Benefits of technology

The patent describes a new technology that merges multiple imaging detectors into a single probe, while keeping each detector separate and independent. This allows for greater sensitivity and lower noise levels. Additionally, the technology does not increase the complexity of the software or storage requirements, making maintenance easier.

Problems solved by technology

However, because of the size of a single photo multiplier, the area is therefore limited.

A larger size imaging probe, as shown in FIG. 5, basically is a series of combination of many single-size imaging detectors side-by-side to get the detecting-area multiply, however, it comes out with a problem that the event signal occurred in the adjacent area being conducted to two or more imaging detectors.

Due to the independence of the detectors, the incomplete signals of those triggering detectors result in, as shown in FIG. 8, the consolidation area crystals can not respond correctly, thus, cause the entire imaging area be discontinuously separated.

The crystal response map as shown in FIG. 6 is obtained with the technology in the prior art, as seem, the image is seriously discontinuous and can not be used in practice.

However, such solution cause the single area of image over-sized and increase the possibilities of occurrence of multiple events at a same time, result in the problems of signals being piled-up, increase of Dead Time and decrease of sensitivity of the imaging probe.

In addition, many series combination of circuit logic in the readouts circuits also result in the decrease of SNR of the weighted circuit and poor quality of signal, eventually, cause the poor sensitivities and poor resolution of the image probe, and further impact the operation efficiency and quality of the instrument.

The technology employed in the prior art is to cascade the detector readouts to get the detector signal sharing between two detectors, which solve the problem of discontinuity and result in the destruction of the independence of each detector to become a larger detector device in series, but cause the problem of increase Dead Time of imaging probe, decrease SNR, being poor resolution.

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