Cooperative Patent Classification


CPC Definition - Subclass G01T

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Last Updated Version: 2016.11
MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N; counters per se G06M, H03K; electric discharge tubes for analysing radiation or particles H01J 40/00, H01J 47/00, H01J 49/00)
Definition statement

This place covers:

  • Methods and instruments for measurement and detection of X-radiation, gamma radiation, corpuscular radiation, cosmic radiation, or neutron radiation.
  • Recording of movements or tracks of particles.
  • Details of instruments for measuring of X-radiation, gamma radiation, corpuscular radiation, cosmic radiation, or neutron radiation.
Relationships with other classification places

Apparatus for radiation diagnosis or therapy in medical and veterinary science are classified in A61B 6/00 or A61N 5/00. The borderline between G01T and A61B should be determined based on whether the apparatus is purely medical or the feature is more of a general technical nature.

There exists a certain overlap between X-radiation and UV-radiation, where measurement of UV-radiation is generally classified in G01J.

Nuclear magnetic resonance is classified in G01R 33/20,G01N 24/08 G01R24/00 or A61B 5/055.

References
Limiting references

This place does not cover:

Radiation analysis of materials, mass spectrometry

Secondary-electron-emitting electrodes in general

Electric discharge tubes for analysing radiation or particles

Construction of ionisation chambers

Spark chambers

Semiconductor detectors per se

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Prospecting by the use of nuclear radiation, natural or induced

Informative references

Attention is drawn to the following places, which may be of interest for search:

Computerised tomographs

Applying radioactive material to the body

A61M36/00

Radiation pyrometry using electric radiation detectors which use the ionisation of gases

Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects

Pulse rate meters in general

Nuclear magnetic computer tomography

Nuclear magnetic resonance.

Photosensitive materials or processes for photographic purposes

Counters per se

Radio isotopes

Tracers

Measuring exposure time to X-rays

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Measuring

attention is drawn to the Notes following the title of class G01

Corpuscular radiation

a stream of atomic or subatomic particles which may be charged positive or negative, or be uncharged

Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation (G01T 3/00, G01T 5/00 take precedence)
Definition statement

This place covers:

  • Methods and instruments for measurement and detection of X-radiation, gamma radiation, corpuscular radiation, cosmic radiation, or neutron radiation.
  • Recording of movements or tracks of particles.
  • Details of instruments for measuring of X-radiation, gamma radiation, corpuscular radiation, cosmic radiation, or neutron radiation.
Relationships with other classification places
  • Apparatus for radiation diagnosis or therapy in medical and veterinary science are classified in A61B 6/00 or A61N 5/00. The borderline between G01T and A61B should be determined based on whether the apparatus is purely for medical diagnosis or the feature is more of a general technical nature.
  • There exists a certain overlap between x-radiation and UV-radiation, where measurement of UV-radiation is generally classified in G01J.
  • Nuclear magnetic resonance is classified in G01R 33/20, G01N 24/00 or A61B 5/055.
References
Limiting references

This place does not cover:

Radiation analysis of materials, mass spectrometry

Secondary-electron-emitting electrodes in general

Electric discharge tubes for analysing radiation or particles

Construction of ionisation chambers

Semiconductor detectors per se

Informative references

Attention is drawn to the following places, which may be of interest for search:

Computerised tomography for diagnosis

Applying radioactive material to the body

A61M36/00

Radiation pyrometry using electric radiation detectors which use the ionisation of gases

Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects Semiconductor detectors constructional details and devices

Pulse rate meters in general

Nuclear magnetic computer tomography

Nuclear magnetic resonance.

Prospecting by the use of nuclear radiation, natural or induced

Photosensitive materials or processes for photographic purposes

Counters per se

Radio isotopes

Tracers

Spark chambers

Measuring exposure time to X-rays

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Measuring

Attention is drawn to the Notes following the title of class G01.

Corpuscular radiation

a stream of atomic or subatomic particles which may be charged positive or negative, or be uncharged.

Measuring radiation intensity (G01T 1/29 takes precedence; {self-powered detectors G01T 3/006; using an ionisation chamber filled with a liquid or solid, e.g. frozen liquid, dielectric G01T 3/008})
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Arrangements or instruments using NMR

Electrical or Magnetic Prospecting using NMR

Special rules of classification

The combined use of CT and NMR as one device is to be classified here as well as in G01R 33/00 depending on the invention details.

If the invention details are directed towards the CT aspects then it will be for G01T even though NMR is mentioned. Conversely, invention details pertaining to the NMR will go to G01R 33/00 and not G01T.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

NMR

Nuclear Magnetic Resonance (imaging of nuclei of atoms inside the body using a magnetic field)

Application in the field of nuclear medicine, e.g. in vivo counting {(apparatus for radiation diagnosis A61B 6/00)}
Definition statement

This place covers:

Hand held surgical probe detectors used for locating or scanning an area of the body

Intracorporeal devices for detecting radiation from within the body (e.g. endoscopy, laparoscopy etc).

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

For Use In Medical Diagnosis

{using a scintillation crystal and position sensing photodetector arrays, e.g. ANGER cameras}
Definition statement

This place covers:

Using one single scintillator with several photodetectors

{using an array of optically separate scintillation elements permitting direct location of scintillations (G01T 1/1645 takes precedence)}
Definition statement

This place covers:

Using several individual scintillator-photodiode arrays

{using coded aperture devices, e.g. Fresnel zone plates (handling of radiation of particles, e.g. using diaphragms, collimators, diffraction G21K 1/00)}
References
Limiting references

This place does not cover:

For Optical Applications (e.g. using light)

{In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis); (using external radiation sources A61B 6/02)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

CT for use in medical diagnosis

{Radioisotope data or image processing not related to a particular imaging system; Off-line processing of pictures, e.g. rescanners (for measuring radiation intensity G01T 1/1663; digital computing or data processing equipment or methods specially adapted for nuclear physics or nuclear engineering G06F 15/00; general purpose image data processing G06T 1/00; computerized tomography G06T 11/003)}
Definition statement

This place covers:

  • Stimulable Phosphor Sheets.
  • Read-out systems using laser scanning.
  • Erasing of signal.
Stabilisation of spectrometers {(circuits specially adapted for scintillation detectors G01T 1/208)}
Definition statement

This place covers:

Stabilization of the photodetector using an internal source (e.g. LED) to overcome drift.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Calibration Techniques

Measuring neutron radiation (G01T 5/00 takes precedence; {tubes therefor H01J 47/12; circuits with such tubes G01T 1/18; measuring short time intervals G04F 10/00; measuring pulse characteristics G01R 29/02; neutron choppers G21K 1/04; polarimeters G01T 1/32})
Definition statement

This place covers:

  • Methods and instruments for measuring neutron radiation.
  • Neutron Detectors (e.g. Scintillators, Solid-State ).
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Ionisation Detectors

Investigating or analysing materials by determining their chemical or physical properties

Detecting hidden objects e.g. weapons, narcotics, explosives

Measuring reactor flux

Neutron Sources

Using collimators, diaphragms

Generating neutron beams

Scintillation chambers (discharge tubes H01J 40/00, H01J 47/00; semiconductor devices H01L)
Definition statement

This place covers:

Scintillation fibre (i.e. fibres made from scintillation material)

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Optical fibres used as connectors between scintillator and photodiodes

Details of radiation-measuring instruments
Definition statement

This place covers:

  • Detecting radiation from a safe distance (e.g. contaminated areas, highly radioactive objects).
  • Using remotely-controlled mobile detector units.
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Detector interrogation using an external network