Methods and systems are disclosed for segmenting an image. First and second frames of image data are generated at different times. A first portion of the first frame is compared to image data of the second frame, and a second portion of the second frame is selected based on the comparison. A displacement vector between the first portion and the second portion is calculated, where the displacement vector represents relative movement over time between the image data represented by the first portion and the image data represented by the second portion. An image is output with an indicator, and the location of the indicator on the image is determined by using the calculated displacement vector. The indicator can serve to distinguish between items in an imaging view.

Claims

20 · 3 independent · depth 4

20 granted claims

›1.independentA method of segmenting an image, the method comprising the steps of: generating a first frame of image data representing a plurality of items in an im…+13

›2.↳ 1The method of claim 1 , wherein the second portion is selected based on the comparison by determining that the second subset of image data corresponds…d2+5

›3.↳ 2The method of claim 2 , wherein comparing the selected first portion to image data of the second frame comprises calculating a matching error between …d3+1

›5.↳ 2The method of claim 2 , wherein comparing the selected first portion to image data of the second frame comprises comparing the selected first portion …d3+2

›8.↳ 1The method of claim 1 , further comprising the steps of: outputting on the display an image having an indicator at a location on the image that repres…d2+2

›11.↳ 1The method of claim 1 , wherein the first time corresponds to a first part of a cardiac cycle and the second time corresponds to a second part of the …d2+1

›13.↳ 1The method of claim 1 , further comprising the step of: measuring a heart rate of a patient, wherein the first and second times are determined using t…d2+1

›15.independentAn imaging system comprising: a catheter assembly including an intravascular imaging device having an imaging module configured to emit and receive en…+3

An imaging system comprising: a catheter assembly including an intravascular imaging device having an imaging module configured to emit and receive energy at a first time to generate a first frame of image data and emit and receive energy at a second time that is different from the first time to generate a second frame of image data, wherein the image data represents a plurality of image elements; a user interface including an image display region; and an imaging engine in communication with the intravascular imaging device and the user interface and comprising at least one processor, the imaging engine being configured to: select, using the at least one processor, a first portion of the first frame, the first portion having a first subset of the image data of the first frame; compare, using the at least one processor, the selected first portion to image data of the second frame; select, using the at least one processor, a second portion of the second frame based on the comparison, the second portion having a second subset of the image data of the second frame; calculate, using the at least one processor, a first displacement vector representing relative movement between the first portion at the first time and the second portion at the second time; select, using the at least one processor, a third portion of the first frame, the third portion having a third subset of the image data of the first frame, and wherein the third subset of the image data of the first frame differs from the first subset of the image data of the first frame; compare, using the at least one processor, the selected third portion to image data of the second frame; select, using the at least one processor, a fourth portion of the second frame based on the comparison, the fourth portion having a fourth subset of the image data of the second frame; calculate, using the at least one processor, a second displacement vector representing relative movement between the third portion at the first time and the fourth portion at the second time; compare a length of the first displacement vector to a length of the second displacement vector; and based on the length of the first displacement vector differing from the length of the second displacement vector, determine that the first portion of the first frame of image data represents blood within a vessel lumen and the third portion of the first frame of image data represents vessel tissue or plaque.

›19.independentA non-transitory computer-readable storage article having computer-executable instructions stored thereon to cause at least one programmable processor…+1

A non-transitory computer-readable storage article having computer-executable instructions stored thereon to cause at least one programmable processor to: select a first portion of a first frame of image data, the first frame of image data representing a plurality of image elements generated at a first time, the first portion having a first subset of the image data of the first frame; compare the selected first portion to image data of a second frame of image data, the second frame of image data representing a plurality of image elements generated at a second time; select a second portion of the second frame based on the comparison, the second portion having a second subset of the image data of the second frame; calculate a first displacement vector representing relative movement between the first portion at the first time and the second portion at the second time; select a third portion of the first frame of image data, the third portion having a third subset of the image data of the first frame, and wherein the third subset of the image data of the first frame differs from the first subset of the image data of the first frame; compare the selected third portion to image data of the second frame; select a fourth portion of the second frame based on the comparison, the fourth portion having a fourth subset of the image data of the second frame; calculate a second displacement vector representing relative movement between the third portion at the first time and the fourth portion at the second time; compare a length of the first displacement vector to a length of the second displacement vector; based on the length of the first displacement vector differing from the length of the second displacement vector, determine that the first portion of the first frame of image data represents blood within a vessel lumen and the third portion of the first frame of image data represents vessel tissue or plaque; and position an indicator on an image at a location representing an interface between blood within the vessel lumen and vessel tissue or plaque.

Classifications

8 codes

IPC · International Patent Classification

Section A — Human necessities

A61B8/12
A61B5/02

Section G — Physics

G06T7/174
G06T7/215
G06K9/34
G06K9/00
G06T7/223
G06F19/00

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Pendency

2.2 y

813 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Tom Y Lu

art unit 2667 · TC 2600

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Citations: 132 back · 0 forward

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Priority chain

2 priority documents

Priority

16 May 2016

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 62336903	16 May 2016
related publication	US 20170330331 A1	16 Nov 2017

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