US 11,589,929 B2Granted

Assessing device for assessing an instrument's shape with respect to its registration suitability

AssigneeKoninklijke Philips N.V.

InventorAhmet Ekin

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Abstract

The invention relates to an assessing device (13) for assessing the suitability of a shape of an instrument like a guidewire for a registration of a position and shape determination device (10) like an optical shape sensing device with an imaging device (2). Curvature values being indicative of the curvature at several positions along the instrument are determined, which are used for determining shape feature values. These shape feature values are then used for determining a suitability value being indicative of the suitability of the shape of the instrument for the registration procedure, wherein an output is provided to a user based on the determined suitability value. The user can therefore modify the shape until the output indicates that the shape of the instrument is suitable for the registration, without requiring any image. This can reduce a radiation dose if the image is, for instance, an x-ray image.

Claims13

Dependent claims

An assessing device for assessing a shape of an instrument, wherein the assessing device is configured to assess the suitability of the shape of the instrument for performing a registration procedure, wherein the shape has been determined by a position and shape determination device and is provided to the assessing device, and wherein the registration procedure relates to a registration of the position and shape determination device with an imaging device for imaging the instrument, wherein the assessing device comprises:

a feature determination unit configured to:
determine first shape feature values which depend on the position and shape of the instrument;
determine curvature values being indicative of the curvature at several portions of the instrument at locations having predetermined distance;
determine the first shape feature values based on the curvature values determine orientation difference values being indicative of the orientation differences of portions of the instrument at locations along the instrument having a predetermined distance to each other;
determine a first number being indicative of the number of orientation difference values above a predetermined first threshold:
determine a second number being indicative of the number of orientation difference values above a predetermined second threshold;
and determine the orientation change value based on the first number and the second number;
a suitability value determination unit configured to determine a first suitability value being indicative of the suitability of the shape of the instrument for the registration procedure based on the determined first shape feature values;
and
an output unit for providing an output to a user based on the determined first suitability value, wherein the feature determination unit is configured such that the first shape feature values include at least one of a maximum curvature value and an orientation change value being indicative of a change of orientation along the instrument.

7 more elements

An assessing method for assessing a suitability of a shape of an instrument for performing a registration procedure, wherein the position and shape has been determined by a position and shape determination device for determining a position and shape of an instrument and wherein the registration procedure relates to a registration of the position and shape determination device with an imaging device for imaging the instrument, wherein the assessing method comprises:

determining first shape feature values which depend on the shape of the instrument by a feature determination unit, wherein the feature determination unit determines curvature values being indicative of the curvature at several portions of the instrument at locations having predetermined distance and determines the first shape feature values based on the curvature values,
determining a first suitability value being indicative of the suitability of the shape of the instrument for the registration procedure based on the determined first shape feature values by a suitability value determination unit;
determining orientation difference values being indicative of the orientation differences of portions of the instrument at locations along the instrument having a predetermined distance to each other;
determining a first number being indicative of the number of orientation difference values above a predetermined first threshold;
determining a second number being indicative of the number of orientation difference values above a predetermined second threshold;
determining the orientation change value based on the first u and the second number, and
providing an output to a user based on the determined first suitability value by an output unit, wherein the first shape feature values include at least one of a maximum curvature value and an orientation change value being indicative of a change of orientation along the instrument.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/040,570Filed 26 Mar 2019
Priority: EP 1816430527 Mar 2018
Published: US 2021/0059767 A14 Mar 2021
Granted: 28 Feb 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

A61B 6/12
Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment: arrangements…
A61B 34/20
Computer-aided surgery; Manipulators or robots specially adapted for use in surgery: surgical navigation systems; Devices for tracking or guiding…
A61B 5/065
Devices, other than using radiation, for detecting or locating foreign bodies ; Determining position of diagnostic devices within or on the body…:…
G06T 7/50
Image analysis: depth or shape recovery