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Integrated multi-channel time-to-digital converter for time-of-flight pet

A digital converter and time-of-flight technology, applied in the direction of time-to-digital converters, instruments, scientific instruments, etc., can solve the problems of increasing bandwidth and system cost, increasing complexity, etc., and achieve the effect of low power consumption

Active Publication Date: 2009-06-24
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this correction adds complexity and increases bandwidth and system cost
Also, even with this correction, some jitter is still present

Method used

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  • Integrated multi-channel time-to-digital converter for time-of-flight pet

Examples

Experimental program
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Embodiment Construction

[0030] refer to figure 1A time-of-flight positron emission tomography (TOF-PET) scanner 2 includes a housing 4 and a bed board 6 or other patient support. The housing 4 defines a hole-type imaging area 8 . The radiation detector array 10 is arranged to observe the imaging region 8 . It should be noted that the single radiation detector array 10 shown is illustrative and that the scanner 2 generally includes a ring of one or more such detector arrays surrounding the image area 8 to acquire data at substantially any angle. In addition, it should be noted that the radiation detector array 10 is illustrated schematically - the radiation detectors are generally housed within the housing 4 of the scanner 2, and thus are generally not visible from the outside, and that each radiation detector ring typically includes several Hundreds or thousands of radiation detector elements. In some PET scanners, only a single ring of radiation detectors is provided; in others, two, three, four,...

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Abstract

In a radiation detector (10) for a time of flight positron emission tomography (PET) scanner (2), a radiation sensitive member (20) generates a signal (22) indicative of a radiation detection event. A time to digital converter (34) includes digital delay elements (40) operatively interconnected as a ring oscillator (36, 36') and readout circuitry (50, 52, 60, 82, 84, 86, 88) configured to generate a timestamp for the radiation detection event based at least on a state of the ring oscillator when the signal is generated. Delay trim elements (46) operatively connected to the digital delay elements set a substantially common delay for the digital delay elements. Additionally or alternatively, the digital delay elements (40) include readout buffers (48') having transition times substantially longer than a delay of the digital delay elements, analog to digital converters (82, 84) digitize values of the delay elements, and decoding circuitry (86, 88) computes the state of the ring oscillator (36') based on the digitized values.

Description

technical field [0001] This application relates to data sampling, time stamping (TimesTamping) and related technologies. This application provides and describes specific applications of time-to-digital converters for providing sub-nanometer resolution of radiation detection events in time-of-flight positron emission tomography (PET) scans. Timestamp with second resolution. However, the following provides primarily the more general use of time-to-digital conversion in other medical applications, and applications, methods, and devices employing such time-to-digital conversion, such as timing of light or light-speed events, radiation detection events in nuclear processes timing of events, timing of other time-sensitive events, and so on. Background technique [0002] In PET, a human patient or other imaging subject administers a radiopharmaceutical. A radiopharmaceutical undergoes a radioactive decay event that emits a positron, which travels a short distance and then rapidl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/29
CPCG04F10/005G01T1/2985A61B6/037
Inventor T·J·佐尔夫P·菲舍尔
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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