Global Patent Index - EP 1021128 A1

EP 1021128 A1 2000-07-26 - COMPUTED TOMOGRAPHY SCANNING TARGET DETECTION

Title (en)

COMPUTED TOMOGRAPHY SCANNING TARGET DETECTION

Title (de)

ZIELERFASSUNG BEI DER COMPUTERTOMOGRAPHIE

Title (fr)

DETECTION DE CIBLE PAR TOMOGRAPHIE ASSISTEE PAR ORDINATEUR

Publication

EP 1021128 A1 (EN)

Application

EP 98948103 A

Priority

  • US 9818561 W
  • US 94849197 A
  • US 94849297 A
  • US 94869797 A

Abstract (en)

[origin: WO9918854A1] Using helical cone beam (114) scanning, a nutating slice CT system generates three-dimensional projection data and reconstructs a series of planar image slices (132) having equal tilt angles ( theta ) and changing rotation angles with respect to the longitudinal axis of the scanned object, causing the normals to nutate and process about the longitudinal axis (Z). Conventional two-dimensional reconstruction is used, since the projection data (130) of the tilted slices (132) is one-dimensional fan beam data. Two-dimensional images may be created at stationary projection angles. Nutation or tilt of voxels may be compensated, and parallel processing may be used.

IPC 1-7 (main, further and additional classification)

A61B 6/03

IPC 8 full level (invention and additional information)

A61B 6/03 (2006.01); G06T 1/00 (2006.01)

CPC (invention and additional information)

A61B 6/032 (2013.01); A61B 6/027 (2013.01); A61B 6/5258 (2013.01); G06T 11/005 (2013.01)

Citation (search report)

See references of WO 9918854A1

Designated contracting state (EPC)

DE GB NL

EPO simple patent family

WO 9918854 A1 19990422; AU 9474398 A 19990503; CN 1336811 A 20020220; EP 1021128 A1 20000726; JP 2001519192 A 20011023; JP 3585835 B2 20041104

INPADOC legal status


2004-10-13 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20040401

2000-10-25 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: CRAWFORD, CARL, R.

2000-10-25 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: BAILEY, ERIC

2000-10-25 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: GREENBERG, ALEXANDER, I.

2000-10-25 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: RUTH, CHRISTOPHER, C.

2000-10-11 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: CRAWFORD, CARL, R.

2000-10-11 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: BAILEY, ERIC

2000-10-11 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: GREENBERG, ALEXANDER, I.

2000-10-11 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: RUTH, CHRISTOPHER, C.

2000-07-26 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000510

2000-07-26 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE GB NL