# US 10,368,844 B2 · Automated biplane-PW workflow for ultrasonic stenosis assessment

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- Number: US 10,368,844 B2
- Document ID: US10368844B2
- Status: Granted
- Kind: B2
- Application number: 14/431,463
- Filed: 2013-09-27
- Published: 2015-09-10
- Granted: 2019-08-06
- Earliest claimed: 2012-09-27
- Assignees: Koninklijke Philips N.V.
- Applicants: Koninklijke Philips N.V.
- Inventors: James Robertson Jago; Keith William Johnson; Ashraf Saad; David Allen Hull
- Web page: https://patentgrep.com/patent/US10368844B2

## CPC

- A61B 8/488: {involving Doppler signals}
- A61B 5/02: Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B 8/06: Measuring blood flow
- A61B 8/145: {characterised by scanning multiple planes}
- A61B 8/483: {involving the acquisition of a 3D volume of data}
- A61B 8/5223: {for extracting a diagnostic or physiological parameter from medical diagnostic data (for algorithms to analyse biomedical images G06T7/0012)}
- G01S 7/52063: {Sector scan display}
- G01S 7/52066: {Time-position or time-motion displays}
- G01S 7/52073: {Production of cursor lines, markers or indicia by electronic means}
- G01S 7/52074: {Composite displays, e.g. split-screen displays; Combination of multiple images or of images and alphanumeric tabular information}
- G01S 15/8915: {using a transducer array}
- G01S 15/8925: {the array being a two-dimensional transducer configuration, i.e. matrix or orthogonal linear arrays}
- G01S 15/8979: {Combined Doppler and pulse-echo imaging systems}
- G01S 15/8988: {Colour Doppler imaging}
- G01S 15/8993: {Three dimensional imaging systems}
- G06T 7/0012: {Biomedical image inspection}
- G01S 7/5208: {with integration of processing functions inside probe or scanhead}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

An ultrasound system with a matrix array (500) probe (10) operable in the biplane mode is used to assess stenosis of a blood vessel by simultaneously displaying two color Doppler biplane images (60a, 60b) of the vessel, one a longitudinal cross-sectional view (60a) and the other a transverse cross-sectional view (60b). The two image planes intersect along a Doppler beam line (68) used for PW Doppler. A sample volume graphic (SV) is positioned over the blood vessel at the peak velocity location in one image, then positioned over the blood vessel at the peak velocity location in the other image. As the sample volume location is moved in one image, the plane and/or sample volume location of the other image is adjusted correspondingly. Spectral Doppler data (62) is then acquired and displayed from the sample volume location.

## Claims

### Claim 1

A method for operating an ultrasonic diagnostic imaging system having a matrix array probe operable in a biplane mode for the conduct of blood flow assessment, the method comprising:
imaging a blood vessel in color Doppler mode in first and second image planes and simultaneously displaying first and second image displays, each associated with a respective one of the first and second image plane;
locating a first peak velocity location in the first image plane;
positioning a Doppler sample volume in the first image display to correspond with the first peak velocity location;
displaying a Doppler beam line through the Doppler sample volume in the first image display;
aligning the first and second image planes with the Doppler beam line;
centering the Doppler sample volume at a second peak velocity location in the second image plane;
generating a spectral Doppler display of flow data for flow velocities at the location of the Doppler sample volume; and
measuring velocity characteristics using the flow data of the acquired spectral Doppler display.

### Claim 2 (depends on 1)

The method of claim 1, wherein the imaging in the first and second image planes comprises alternately scanning the first and second image planes.

### Claim 3 (depends on 1)

The method of claim 1, wherein the imaging in the first and second planes comprises scanning an image plane intersecting the first image plane along the Doppler beam line for imaging in the second image plane.

### Claim 4 (depends on 3)

The method of claim 3, further comprising repositioning a Doppler sample volume graphic along the Doppler beam line in the first image display to correspond with the second peak velocity location in the second image plane.

### Claim 5 (depends on 1)

The method of claim 1, wherein centering the Doppler sample volume at the second peak velocity location in the second image comprises positioning a Doppler sample volume graphic in the second image display at the second peak velocity location in the second image plane responsive to user input.

### Claim 6 (depends on 1)

The method of claim 1, wherein generating a spectral Doppler display further comprises acquiring a Doppler spectral display by means of PW Doppler acquisition.

### Claim 7 (depends on 3)

The method of claim 3, wherein generating a spectral Doppler display further comprises acquiring a Doppler spectral display by means of PW Doppler acquisition in the direction of the Doppler beam line.

### Claim 8 (depends on 1)

The method of claim 1, further comprising automatically repositioning the first image plane to include the second peak velocity location in the second image plane.

### Claim 9 (depends on 1)

The method of claim 1, wherein centering the Doppler sample volume at the second peak velocity location in the second image plane is responsive to user input.

### Claim 10 (depends on 1)

The method of claim 1, wherein at least one of positioning the Doppler sample volume in the first image display to correspond with the first peak velocity location and centering the Doppler sample volume at the second peak velocity location in the second image plane further comprises automatically positioning a sample volume graphic in the respective image display.

### Claim 11 (depends on 1)

The method of claim 1, wherein the spectral Doppler display is a scrolling spectral Doppler display.

### Claim 12 (depends on 1)

The method of claim 1, wherein imaging a blood vessel in color Doppler mode further comprises automatically optimizing a biplane color Doppler image by positioning the Doppler sample volume over the blood vessel and selecting an optimal Doppler steering angle.

### Claim 13 (depends on 1)

The method of claim 1, wherein generating a spectral Doppler display further comprises automatically optimizing a spectral Doppler display.

### Claim 14 (depends on 1)

The method of claim 1, wherein imaging a blood vessel in color Doppler mode further comprises imaging the blood vessel in the first image plane in a longitudinal cross-sectional view and imaging the blood vessel in the second image plane in a transverse cross-sectional view.