Systems and methods for intraoperative targetting

• US 20050085718A1
• Filed: 01/26/2004
• Published: 04/21/2005
• Est. Priority Date: 10/21/2003
• Status: Abandoned Application

• Current Assignee: Ramin Shahidi
• Original Assignee: Ramin Shahidi
• Inventors: Shahidi, Ramin
• Application Number:
  US10/764,651
• Publication Number:
  US 20050085718A1
• Time in Patent Office: Days
• US Class Current: 600/424
• CPC Class Codes: A61B 1/04 combined with photographic or television appliances
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2034/2055 Optical tracking systems
• CPC Class Codes: A61B 2034/2072 Reference field transducer attached to an instrument or patient
• CPC Class Codes: A61B 2090/364 Correlation of different images or relation of image positions in respect to the body
• CPC Class Codes: A61B 2090/378 using ultrasound
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems
• CPC Class Codes: A61B 5/064 using markers A61B5/062 takes precedence
• CPC Class Codes: A61B 8/0833 involving detecting or locating foreign bodies or organic structures
• CPC Class Codes: A61B 8/0841 for locating instruments
• 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 8/4245 involving determining the position of the probe, e.g. with respect to an external reference frame or to the patient
• CPC Class Codes: A61B 8/4254 using sensors mounted on the probe
• CPC Class Codes: A61B 8/4416 related to combined acquisition of different diagnostic modalities, e.g. combination of ultrasound and X-ray acquisitions
• CPC Class Codes: A61B 8/463 characterised by displaying multiple images or images and diagnostic data on one display composite display in devices for short-range imaging with acoustic waves G01S7/52074
• CPC Class Codes: A61B 8/483 involving the acquisition of a 3D volume of data
• CPC Class Codes: A61B 90/36 Image-producing devices or illumination devices not otherwise provided for

Abstract

Systems and methods are disclosed for assisting a user in guiding a medical instrument to a subsurface target site in a patient by indicating a spatial feature of a patient target site on an intraoperative image (e.g., endoscopic image), determining 3-D coordinates of the patient target site spatial feature in a reference coordinate system using the spatial feature of the target site indicated on the intraoperative image (e.g., ultrasound image, determining a position of the instrument in the reference coordinate system, projecting onto a display device a view field from a predetermined position relative to the instrument in the reference coordinate system, and projecting onto the view field an indicia of the spatial feature of the target site corresponding to the predetermined position.

Claims

1. A method for guiding a medical instrument to a target site within a patient, comprising:

capturing at least one ultrasound image from the patient;

identifying a spatial feature indication of a patient target site on the ultrasound image,

determining coordinates of the patient target site spatial feature in a reference coordinate system,

determining a position of the instrument in the reference coordinate system,

creating a view field from a predetermined position, and optionally orientation, relative to the instrument in the reference coordinate system, and

projecting onto the view field an indicia, area or an object representing the spatial feature of the target site corresponding to the predetermined position, and optionally orientation.

2. The method of claim 1, wherein said medical instrument is a source of video and the view field projected onto the display device is the image seen by the video source.

3. The method of claim 1, wherein the view field projected onto the display device is that seen from the tip-end position and orientation of the medical instrument having a defined field of view.

4. The method of claim 1, wherein the view field projected onto the display device seen from a position along the axis of instrument different from the target seen at a tip-end position of the medical instrument.