Manual calibration of imaging system
AssigneePhilips Image Guided Therapy Corporation
InventorsAndreas Johansson, Jason Y. Sproul
Life of this patent
Estimating the term…
Abstract
The invention generally relates to methods for manually calibrating imaging systems such as optical coherence tomography systems. In certain aspects, an imaging system displays an image showing a target and a reference item. A user looks at the image and indicates a point within the image near the reference item. A processer detects an actual location of the reference item within an area around the indicated point. The processer can use an expected location of the reference item with the detected actual location to calculate a calibration value and provide a calibrated image. In this way, a user can identify the actual location of the reference point and a processing algorithm can give precision to the actual location.
Claims21
An imaging system, comprising:
- an intravascular imaging catheter configured to be positioned within a vessel of a patient;
- and
- a processor configured for communication with the intravascular imaging catheter, wherein the processor is configured to:
- receive, from the intravascular imaging catheter, a first intravascular image including the vessel and a reference item;
- output, to a display in communication with the processor, the first intravascular image including the vessel and the reference item;
- receive a user input to move the displayed reference item from a first position to a second position, wherein the first position comprises a first diameter, wherein the second position comprises a second diameter different from the first diameter;
- determine a calibration value based on a difference between the first diameter and the second diameter;
- generate, in response to determining the calibration value based on the difference between the first diameter and the second diameter, a second intravascular image of the vessel, wherein the second intravascular image is a transformation of the first intravascular image based on the calibration value;
- and
- output, to the display without conducting a new scan, the second intravascular image of the vessel.
A method, comprising:
- receiving, from an intravascular imaging catheter positioned within a vessel of a patient, a first intravascular image including the vessel and a reference item;
- outputting, to a display, the first intravascular image including the vessel and the reference item;
- receiving a user input to move the displayed reference item from a first position to a second position, wherein the first position comprises a first diameter, wherein the second position comprises a second diameter different from the first diameter;
- determining a calibration value based on a difference between the first diameter and the second diameter;
- generating, in response to determining the calibration value based on the difference between the first diameter and the second diameter, a second intravascular image of the vessel, wherein the second intravascular image is a transformation of the first intravascular image based on the calibration value;
- and
- outputting, to the display without conducting a new scan, the second intravascular image of the vessel.
Dependencies are inferred from the claim text.