US 2011/0215254 A1Published application

Nuclear medical diagnosis apparatus

AssigneeHitachi, Ltd.

InventorsIsao Takahashi, Takafumi Ishitsu, Yuichiro Ueno, Tomoyuki Seino

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Abstract

A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a γ-ray is incident; and an analog ASIC and digital ASIC for processing a γ-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended γ-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.

Claims1

Dependent claims

A nuclear medical diagnosis apparatus, comprising an image pickup device including:

a plurality of radiation detectors that detect radiation from a test object or radiation passing through the test object;
and a signal processing device connected to each of the radiation detectors, the signal processing device processing an output signal from the radiation detector, the nuclear medical diagnosis apparatus generating an image based on information on detected radiation outputted from the signal processing device of the image pickup device, wherein
the signal processing device comprises:
a determination unit that determines whether an output signal from the radiation detector is an intended radiation detection signal or a noise;
a counting unit that counts for the radiation detector a number of times the output signal from the radiation detector is determined as a noise;
and
a control unit which, based on the number of times the output signal from the detector is determined as a noise, determines a relevant radiation detector as faulty, and which controls so as not to process an output signal from the radiation detector that is determined as faulty.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/107,282Filed 13 May 2011
Priority: JP 2006-26955929 Sep 2006
Published: 8 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01T 1/249
With semiconductor detectors: specially adapted for use in SPECT or PET
G01T 1/20184
Scintillation-photodiode combinations: detector read-out circuitry, e.g. for clearing of traps, compensating for traps or compensating for direct hits
G01T 1/20188
Scintillation-photodiode combinations: auxiliary details, e.g. casings or cooling
G01T
Measurement of nuclear or x-radiation

Family

Application11/861,977Continuation · filed 26 Sep 2007
Application12/837,877Continuation · filed 16 Jul 2010
Application13/107,282Continuation
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From the US filing history. Foreign family members aren’t listed.