Three-dimensional shape detection by means of camera images
First Claim
1. A method of detecting the three-dimensional shape of a patient body part to be treated, said method comprising the following steps:
- a) producing a camera image of the patient body part;
b) mapping an outline of the patient body part, said outline appearing sharp in the camera image, in a first plane by means of an analyzer connected to the camera;
c) altering the focusing distance of the camera;
d) mapping a sharp outline of the patient body part in a second plane by means of the analyzer; and
e) repeating steps b) to d) until a sufficient number of outlines has been mapped so that the three-dimensional shape of the patient body part can be established; and
wherein the detected three-dimensional shape of the patient body part to be treated is used together with a navigation system for location referencing in radiotherapy methods or surgical operations.
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Abstract
A method of detecting the shape of an object comprises the following steps: a) producing a camera image of the object; b) mapping an outline of the object, which appears sharp in the camera image, in a first plane by means of an analyzer connected to the camera; c) altering the focusing distance of the camera; d) mapping a sharp outline of the object in a second plane by means of the analyzer; e) repeating steps b) to d) until a sufficient number of outlines has been mapped so that the three-dimensional shape of the object can be established. Also disclosed is an apparatus for implementing the method.
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Citations
12 Claims
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1. A method of detecting the three-dimensional shape of a patient body part to be treated, said method comprising the following steps:
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a) producing a camera image of the patient body part; b) mapping an outline of the patient body part, said outline appearing sharp in the camera image, in a first plane by means of an analyzer connected to the camera; c) altering the focusing distance of the camera; d) mapping a sharp outline of the patient body part in a second plane by means of the analyzer; and e) repeating steps b) to d) until a sufficient number of outlines has been mapped so that the three-dimensional shape of the patient body part can be established; and wherein the detected three-dimensional shape of the patient body part to be treated is used together with a navigation system for location referencing in radiotherapy methods or surgical operations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of detecting the shape of a patient body part to be treated, said method comprising the following steps:
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a) applying at least one marker to the patient body part, said at least one marker being detectable by a navigation system; b) producing a camera image of the patient body part; c) mapping an outline of the patient body part, said outline appearing sharp in the camera image, in a first plane by means of an analyzer connected to the camera; d) altering the focusing distance of the camera; e) mapping a sharp outline of the patient body part in a second plane by means of the analyzer, f) repeating steps c) to e) until a sufficient number of outlines has been mapped so that the three-dimensional shape of the patient body part can be established; g) assigning a location and shape of the mapped three-dimensional patient body part in the navigation system, said assigning being performed based on a position of the at least one marker captured by the camera; and h) processing the mapped shape of the patient body part with the navigation system to incorporate the three-dimensional shape of the patient body part in navigation.
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Specification