Atherectomy catheter with combined OCT/IVUS imaging

• US 7,753,852 B2
• Filed: 09/22/2006
• Issued: 07/13/2010
• Est. Priority Date: 09/22/2005
• Status: Active Grant

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Maschke, Michael
• Primary Examiner(s): Casler; Brian
• Assistant Examiner(s): CWERN, JONATHAN
• Application Number:
  US11/526,178
• Publication Number:
  US 20070066890A1
• Time in Patent Office: 1,390 Days
• Field of Search: 600/407, 600/424, 600/427, 600/439, 600476-480, 600/471, 606/159
• US Class Current: 600/471
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2562/182 Electrical shielding, e.g. using a Faraday cage
• CPC Class Codes: A61B 5/0035 adapted for acquisition of images from more than one imaging mode, e.g. combining MRI and optical tomography
• CPC Class Codes: A61B 5/0066 Optical coherence imaging
• CPC Class Codes: A61B 5/0084 for introduction into the body, e.g. by catheters A61B5/1459 takes precedence
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/113 occurring during breathing
• CPC Class Codes: A61B 5/416 the spleen
• CPC Class Codes: A61B 5/6852 Catheters
• CPC Class Codes: A61B 5/6853 with a balloon
• CPC Class Codes: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61B 8/4254 using sensors mounted on the probe
• CPC Class Codes: A61B 8/5238 for combining image data of patient, e.g. merging several images from different acquisition modes into one image for image registration algorithms G06T7/30
• CPC Class Codes: A61B 8/5276 due to motion

Abstract

Catheter device for performing atherectomy, comprising an atherectomy catheter, an OCT sensor, an IVUS sensor, position sensors and an image processing unit, which is embodied for creating combined 2D and/or 3D images based on the data of the sensors.

Claims

1. A catheter device for performing an atherectomy in a patient, comprising:

an atherectomy catheter having a rotating knife like cutter arranged in a tip area of the catheter;

an OCT sensor arranged in a front part of the atherectomy catheter;

an IVUS sensor arranged in the front part of the atherectomy catheter;

a position sensor interoperated with the OCT sensor and the IVUS sensor; and

an image processing unit connected with the OCT sensor, the IVUS sensor and the position sensor via a data bus, the image processing unit configured to create a combined image based on data from the sensors;

wherein the position sensor is an electromagnetic sensor which comprises a transmit coil arranged in the atherectomy catheter and an external receiver coil, or an external transmit coil and a receiver coil arranged in the atherectomy catheter;

and wherein the OCT sensor or the IVUS sensor is arranged on one side relative to a longitudinal axis of the atherectomy catheter.

2. The catheter device as claimed in claim 1, wherein the position sensor is arranged at the tip area of the atherectomy catheter.

3. The catheter device as claimed in claim 1, wherein the atherectomy catheter is mechanically controlled via pulling wires that steer the tip of the catheter.

4. The catheter device as claimed in claim 1, further comprising a permanent magnet or an electromagnet arranged within the catheter that controls a catheter motion in cooperation with an external magnetic field.

5. The catheter device as claimed in claim 1, wherein the external receiver coil or the receiver coil arranged in the atherectomy catheter comprises an iron core and is functioned as a receiving antenna or an electromagnet for a magnetic navigation.

6. The catheter device as claimed in claim 1, wherein the coils are arranged orthogonally in respective to each other or at a given angle.

7. The catheter device as claimed in claim 1,

wherein the OCT sensor and the IVUS sensor are configured to be rotated separately or together around a longitudinal axis of the atherectomy catheter, or

wherein the atherectomy catheter is configured to be pushed or pulled by a drive unit at a definable speed.

8. The catheter device as claimed in claim 1, further comprising a 3-D image processing unit that produces a 3-D image of the patient,

wherein the image processing unit approximates a center line or an envelope of a part of a body of the patient to be examined,

wherein the 3D image of the patient is recorded by the atherectomy catheter,

wherein the 3D image is registered and fused by the image processing unit based on the approximated center line or envelope with other anatomical image data of the patient, and

wherein the 3D image recorded by the atherectomy catheter and the anatomical image data is transferred to a common coordinate system.

9. The catheter device as claimed in claim 1, further comprising a recording device,

wherein a movement artifact caused by a breathing or a movement of an organ of the patient is determined by recording a frequency or an amplitude of the movement, and

wherein the movement artifact is corrected.

10. The catheter device as claimed in claim 1, wherein the sensors are configured to read out offset in time to avoid a mutual interference.

11. The catheter device as claimed in claim 1, wherein the atherectomy catheter comprises a coating made of conductive antiparticle to provide shielding from an electromagnetic field.

12. The catheter device as claimed in claim 1, wherein the atherectomy catheter and the sensors are electrically decoupled.

13. The catheter device as claimed in claim 1, wherein the atherectomy catheter comprises an x-ray marker.

14. The catheter device as claimed in claim 1, wherein the atherectomy catheter is coated by a coating to reduce a friction resistance.

15. The catheter device as claimed in claim 1, wherein the atherectomy catheter comprises an inflatable balloon to support positioning.

16. The catheter device as claimed in claim 1, wherein the atherectomy catheter comprises a temperature sensor or a pressure sensor arranged at a tip area of the atherectomy catheter.

17. A medical treatment unit for performing an atherectomy procedure in a patient, comprising:

a medical image device which generates an image data of the patient;

a catheter device integrated with the medical image device comprising;

an atherectomy catheter having a rotating knife like cutter arranged in a tip area of the catheter,

an OCT sensor arranged in a front part of the atherectomy catheter,

an IVUS sensor arranged in the front part of the atherectomy catheter,

a position sensor interoperated with the OCT sensor and the IVUS sensor; and

an image processing unit connected with the OCT sensor, the IVUS sensor, the position sensor, and the medical image device via a data bus, the image processing unit configured to create a combined image based on the image data from the medical image device and data from the sensors.

18. A method for creating an examination image in an atherectomy procedure in a patient, comprising:

inserting an atherectomy catheter into a body of the patient, the atherectomy catheter comprising a rotating knife like cutter arranged in a tip area of the catheter, an OCT sensor, an IVUS sensor and a position sensor;

processing and combining image data obtained from the OCT sensor, the IVUS sensor and the position sensor by an image processing unit; and

creating the examination image based on the processed and combined image data.