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PCE
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DIFF Main Group
G06T 12/00

Tomographic reconstruction from projections

Introduced: January 2026

Additional Content IPC

Measuring using magnetic induction tomography for diagnostic purposes Computed tomography [CT] apparatus or devices for radiation diagnosis Tomographic diagnosis using ultrasonic, sonic or infrasonic waves Investigating or analysing materials by transmitting wave or particle radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT] Prospecting or detecting by the use of ionising radiation using tomography

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 2026.

Child Classifications

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  • G06T 12/10 Image preprocessing, e.g. calibration, positioning of sources or scatter correction since 2026 IPC+CPC Available in IPC and CPC
  • G06T 12/20 Inverse problem, i.e. transformations from projection space into object space since 2026 IPC+CPC Available in IPC and CPC
  • G06T 12/30 Image post-processing, e.g. metal artefact correction since 2026 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class G06,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 66,669
  2. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 62,313
  3. MICROSOFT TECHNOLOGY LICENSING US 41,918
  4. GOOGLE US 32,969
  5. SGCC(STATE GRID CORPORATION OF CHINA) 30,822
  6. INTEL CORPORATION US 30,010
  7. TENCENT TECHNOLOGY (SHENZHEN) COMPANY 28,235
  8. HUAWEI TECHNOLOGIES COMPANY CN 26,079
  9. APPLE US 21,891
  10. HUAWEI TECHNOLOGIES COMPANY 20,505

Top Applicants (CPC)

Class G06,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 76,952
  2. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 62,841
  3. MICROSOFT TECHNOLOGY LICENSING US 44,778
  4. GOOGLE US 35,735
  5. INTEL CORPORATION US 32,087
  6. HUAWEI TECHNOLOGIES COMPANY CN 30,572
  7. TENCENT TECHNOLOGY (SHENZHEN) COMPANY 25,023
  8. APPLE US 23,482
  9. SGCC(STATE GRID CORPORATION OF CHINA) 22,548
  10. HUAWEI TECHNOLOGIES COMPANY 20,917