HUMAN CAVITY INNER WALL THREE-DIMENSIONAL MAPPING METHOD, EQUIPMENT AND SYSTEM

• US 20120004540A1
• Filed: 03/16/2010
• Published: 01/05/2012
• Est. Priority Date: 03/16/2009
• Status: Abandoned Application

• Current Assignee: Shanghai MicroPort EP MedTech Co., Ltd. (MicroPort Scientific Corp.)
• Original Assignee: MicroPort Medical (Jiaxing) Co., Ltd. (MicroPort Scientific Corp.)
• Inventors: Liu, Daozhi, Guo, Junmin, Sun, Yiyong, Ma, Changsheng, Zhang, Guowang, Cheng, Huasheng
• Application Number:
  US13/257,288
• Publication Number:
  US 20120004540A1
• Time in Patent Office: Days
• US Class Current: 600/424
• CPC Class Codes: A61B 2562/043 in a linear array
• CPC Class Codes: A61B 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient
• CPC Class Codes: A61B 5/062 using magnetic field

Abstract

A human cavity inner wall three-dimensional mapping method, and a corresponding device and system, comprising: at least one field generating device which generates a plurality of distinguishable fields under excitation of a drive signal; at least one field sensor located in a target device for detecting the distinguishable fields to generate a sensor signal; and a positioning signal processing device for transmitting the drive signal to the field generating device and detecting the output of the field sensor signal to acquire data of five-dimensional position and orientation coordinates of a position on the target device where the sensor is located.

Claims

1-46. -46. (canceled)

47. A field positioning equipment for determining a position and orientation of a target device with respect to a reference system, the equipment comprising:

at least one field generating device, which, under the excitation of a drive signal, generates distinguishable fields;

at least one field sensor located in said target device for detecting the distinguishable fields to generate a sensor signal; and

a positioning signal processing device for transmitting the drive signal to said field generating device and detecting an output of said field sensor signal so as to generate data of five-dimensional position and orientation coordinates of the position on said target device where the sensor is located.

48. The field positioning equipment according to claim 47, wherein said target device of the equipment comprises more than one said field sensor, and said more than one sensor is mutually spaced apart by an equal or unequal distance.

49. The field positioning equipment according to claim 47, wherein the plurality of distinguishable fields generated by said field generating device respectively have different frequencies or different phases, or have both different frequencies and different phases.

50. The field positioning equipment according to claim 49, wherein said positioning signal processing device cross-correlates said drive signal with said sensor signal.

51. The field positioning equipment according to claim 47, wherein said fields are continuous AC magnetic fields or periodically varied DC pulse magnetic fields.

52. The field positioning equipment according to claim 47, wherein said target device further comprises an electrode for acquiring an electrical signal of the heart cavity inner wall of the position where said target device is located.

53. The field positioning equipment according to claim 52, further comprising:

an electrical signal processing device for processing the electrical signal acquired by said electrode such that said electrical signal is combined with data of three-dimensional position coordinates and/or data of two orientation coordinates in the data of five-dimensional position and orientation coordinates of a plurality of points collected by the positioning signal processing device to form a map indicating the transmission situation of the electrical signal via tissue of the heart cavity inner wall.

54. A human cavity inner wall three-dimensional mapping method for determining a position and orientation of a target device with respect to a reference system, said method comprising steps of:

generating a plurality of distinguishable fields by using a drive signal;

detecting the distinguishable fields by at least one sensor preset in said target device so as to generate a sensor signal;

detecting an output of the sensor signal to acquire data of five-dimensional position and orientation coordinates of a position on said target device where the sensor is located, the data of five-dimensional position and orientation coordinates contains data of three-dimensional position coordinates and data of two orientation coordinates.

55. The method according to claim 54, wherein the method further comprises steps of:

acquiring again the data of five-dimensional position and orientation coordinates of the position on said target device where the sensor is located after moving said target device along said human cavity inner wall;

repeating the steps (b) to (d) to acquire a plurality of groups of data of the five-dimensional position and orientation coordinates; and

creating a three-dimensional image model of said human cavity inner wall using the data of three-dimensional position coordinates and/or the data of two orientation coordinates in the acquired plurality of groups of the data of the five-dimensional position and orientation coordinates.

56. The method according to claim 54, wherein said target device is preset with more than one said sensor, by means of which, the method further comprises steps of:

acquiring data of five-dimensional position and orientation coordinates of the position on the target device where the more than one sensor is located using the data respectively measured by the more than one sensor preset in said target device; and

acquiring a partial or whole three-dimensional image model of the target device by processing the acquired data of five-dimensional position and orientation coordinates of the position on the target device where the more than one sensor is located.

57. The method according to claim 56, wherein the more than one said sensor preset in said target device is mutually spaced apart by an equal or unequal distance.

58. The method according to claim 57, wherein said target device is preset with two sensors that are mutually spaced apart by a certain distance.

59. The method according to claim 54, wherein the plurality of distinguishable fields respectively have different frequencies or different phases, or have both different frequencies and different phases.

60. The method according to claim 59, wherein said step (c) further comprises the step of:

cross-correlating said drive signal with said sensor signal.

61. The method according to claim 54, wherein said fields are continuous AC magnetic fields or periodically varied DC pulse magnetic fields.

62. The method according to claim 54, further comprising the step of:

acquiring an electrical signal of the human cavity of the position where said target device is located by using an electrode preset in said target device.

63. The method according to claim 62, further comprising the step of:

forming, according to a time sequence of acquiring said electrical signal, a map indicating the transmission situation of the electrical signals via tissue of the human cavity inner wall by combining the collected plurality of said electrical signals of the human cavity inner wall with the data of the three-dimensional positions in the correspondingly collected five-dimensional data and processing them.

64. A three-dimensional mapping system for a human cavity, comprising:

at least one field generating device, which generates distinguishable fields under excitation of a drive signal;

at least one field sensor located in a target device for detecting said distinguishable fields to generate a sensor signal;

a positioning signal processing device for transmitting the drive signal to said field generating device and detecting an output of said field sensor signal so as to generate data of five-dimensional position and orientation coordinates of the position on said target device where the sensor is located; and

a body surface reference positioning electrode mounted on a surface part of a human body, for determining data of three-dimensional positions and data of three orientations of one position on said body surface reference positioning electrode by at least two field sensors preset therein to provide one reference position, which is still with respect to the surface part of said human body.