System for generating, evaluating and distributing computer-tomographical 4D representations of the heart of a patient

• US 7,526,063 B2
• Filed: 04/18/2006
• Issued: 04/28/2009
• Est. Priority Date: 04/19/2005
• Status: Expired due to Fees

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Uebler, Johann, Kuettner, Axel, Boing, Dieter
• Primary Examiner(s): Glick; Edward J
• Assistant Examiner(s): TANINGCO, ALEXANDER H
• Application Number:
  US11/405,641
• Publication Number:
  US 20060245536A1
• Time in Patent Office: 1,106 Days
• Field of Search: 378 4- 12, 378/95, 378/901
• US Class Current: 378/8
• CPC Class Codes: A61B 6/027 characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/503 for diagnosis of the heart
• CPC Class Codes: A61B 6/541 involving acquisition triggered by a physiological signal
• CPC Class Codes: G06T 11/005 Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
• CPC Class Codes: G06T 2211/412 Dynamic
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

A system is disclosed for generating, evaluating and distributing computer-tomographical 4D representations of the heart of a patient. The system includes a cardio CT appliance, where a first low-resolution reconstruction of cardio recordings in a multiplicity of cycle phases of the cardiac cycle and subsequent volume rendering of these cardio recordings for 3D representation and examination of the clarity of motion of the representation in the individual cycle phases are performed. This representation is used to select one or two cycle phases with a relatively reduced or even minimal lack of clarity of motion. High-resolution representations of the heart are reconstructed for these selected one or two cycle phases, with the computation and control unit transmitting only the high-resolution representations of the selected cycle phases with a relatively reduced lack of clarity of motion to the at least one workstation as still images, and the workstation being used to perform the evaluation.

Claims

1. A system for generating, evaluating and distributing computer-tomographical 4D representations of the heart of a patient, comprising:

at least one workstation configured to perform an evaluation of the patient; and

a CT appliance including at least one beam source, at least one detector, and a control and computation unit connected to the at least one workstation via a network,

the at least one beam source configured to move on a spiral path around the patient,

the at least one detector configured to detect absorption of radiation from the beam source,

the control and computation unit configured to

control the CT appliance,

reconstruct the computer-tomographical 4D representation of the motion of the heart,

perform a first low-resolution reconstruction of the cardio recordings in a multiplicity of cycle phases of the cardiac cycle,

perform volume rendering of these cardio recordings for 3D representation and examination of the clarity of motion in the representation in the individual cycle phases,

select one or two cycle phases with a relatively reduced lack of clarity of motion,

reconstruct high-resolution representations of the heart for the selected one or two cycle phases, and

transmit only the high-resolution representations of the selected cycle phases with a relatively reduced lack of clarity of motion to the at least one workstation as still images.

2. The system as claimed in claim 1, wherein the control and computation unit is further configured to remove all other objects which are not used to represent the heart before transmitting the still images to the at least one workstation.

3. The system as claimed in claim 1, wherein the at least one workstation includes a screen and is configured to take the 3D representation of a cycle phase of the heart received as a still image from the control and computation unit and generate a sectional image in a plane specified manually on the screen.

4. The system as claimed in claim 3, wherein the at least one workstation is further configured to receive a user input of a click on a coronary artery in the 3D representation of a cycle phase of the heart, mark the entire length of this coronary artery and make a curved virtual cut along the coronary artery and outputs the curved virtual cut as a 2D representation on the screen.

5. The system as claimed in claim 1, wherein, the control and computation unit selects a respective cardiac phase for which the high-resolution reconstruction is performed to produce an improved representation of the left and right coronary arteries of the heart.

6. The system as claimed in claim 5, wherein the control and computation unit selects the respective cardiac phase for high-resolution reconstruction automatically by image analysis.

7. The system as claimed in claim 6, wherein the control and computation unit includes a display and a result of the automatic selection is presented to a user on the display, and said user at least one of confirms the selection and changes the selection for the high-resolution reconstruction.

8. The system as claimed in claim 1, wherein the control and computation unit is further configured to create a low-resolution film sequence of a volume-rendered representation of cardiac motion and transmit the low-resolution film sequence of the volume-rendered representation to the at least one workstation.

9. The system as claimed in claim 1, wherein only the control and computation unit is configured to automatically calculate an ejection fraction of the heart, and result data are transmitted to the at least one workstation.

10. The system as claimed in claim 1, wherein only the control and computation unit is configured to automatically calculate a contractility of the heart, and result data are transmitted to the at least one workstation.

11. The system as claimed in claim 1, wherein only the control and computation unit is configured to automatically calculate a myocardial mass, and result data are transmitted to the at least one workstation.

12. The system as claimed in claim 1, wherein only the control and computation unit is configured to automatically analyze myocardial wall motions and possible disturbances therein, and result data are transmitted to the at least one workstation.

13. The system as claimed in claim 2, wherein the at least one workstation includes a screen and is configured to take the 3D representation of a cycle phase of the heart received as a still image from the control and computation unit and generate a sectional image in a plane specified manually on the screen.

14. The system as claimed in claim 1, wherein the at least one workstation is further configured to receive a user input of a click on a coronary artery in the 3D representation of a cycle phase of the heart, mark the entire length of this coronary artery and make a curved virtual cut along the coronary artery and outputs the curved virtual cut as a 2D representation on the screen.

15. A system for generating, evaluating and distributing computer-tomographical 4D representations of the heart of a patient, comprising:

means for detecting absorption of radiation coming from a beam source;

means for performing a first low-resolution reconstruction of the cardio recordings in a multiplicity of cycle phases of the cardiac cycle;

means for a subsequent volume rendering of these cardio recordings for 3D representation and examination of the clarity of motion in the representation in the individual cycle phases;

means for using the representation to select one or two cycle phases with a relatively reduced lack of clarity of motion, with high-resolution representations of the heart being reconstructed for these selected one or two cycle phases; and

means for transmitting only the high-resolution representations of the selected cycle phases with a relatively reduced lack of clarity of motion to the at least one workstation as still images.

16. The system as claimed in claim 15, further comprising:

means for removing all other objects which are not used to represent the heart before the means from transmitting transmits the still images.

17. A computer readable medium storing executable instruction, which when executed by a control and computation unit, causes the control and computation unit to perform a method comprising:

performing a first low-resolution reconstruction of cardio recordings in a multiplicity of cycle phases of the cardiac cycle;

subsequent volume rendering of the cardio recordings for 3D representation and examination of the clarity of motion in the representation in the individual cycle phases;

using the 3D representation to select one or two cycle phases with a relatively reduced lack of clarity of motion, with high-resolution representations of the heart being reconstructed for these selected one or two cycle phases; and

transmitting only the high-resolution representations of the selected cycle phases with a relatively reduced lack of clarity of motion to at least one workstation over a network as still images.