One-dimensional position indicator

Patent metadata

Field	Value
Publication number	US-12138117-B2
Application number	US-202118015814-A
Country	US
Kind code	B2
Filing date	Jul 7, 2021
Priority date	Jul 14, 2020
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

Disclosed herein is a medical system ( 100, 300, 500 ) comprising: a memory ( 110 ) storing machine executable instructions, at least one set of predetermined coordinates ( 124 ), and a position identifying algorithm ( 122 ). The position identifying algorithm is configured for outputting a set of current coordinates ( 128 ) for each of the at least one set of predetermined coordinates in response to receiving a current image descriptive of an object ( 306, 310 ). The execution of machine executable instructions ( 120 ) causes a computational system ( 104 ) to repeatedly receive ( 200 ) a current image ( 126 ) from a camera system ( 304 ). The execution of machine executable instructions ( 120 ) causes a computational system ( 104 ) to perform the following for the current image: receive ( 202 ) the set of current coordinates for each of the at least one set of predetermined coordinates in response to inputting the current image into the position identifying algorithm; calculate ( 204 ) a positional difference ( 130 ) between the at least one set of predetermined coordinates and its set of current coordinates; calculate ( 206 ) a one-dimensional value ( 134 ) from positional difference using an objective function; and provide ( 208 ) a one-dimensional position indicator ( 136, 314, 600, 602, 608, 800, 900, 1002 ) for each of and controlled by each one-dimensional value in real time using a user interface ( 108, 308, 416, 418 ).

First claim

The invention claimed is:

1. A medical system comprising:
a memory configured to store machine executable instructions, at least one set of predetermined coordinates, and a position identifying algorithm, wherein the position identifying algorithm is configured to output a set of current coordinates for each of the at least one set of predetermined coordinates in response to receiving a current image descriptive of an object, wherein the at least one set of predetermined coordinates are anatomical locations, and wherein the object is a subject;
a camera system;
a user interface comprising a display;
a medical imaging system, wherein the medical imaging system is at least one of the following: an x-ray system, a digital fluoroscope, a magnetic resonance imaging system, a diagnostic ultrasound system, a computed tomography system, a positron emission tomography system, and a single photon emission tomography system, wherein each of the at least one set of predetermined coordinates defines a three-dimensional position and orientation of a body part of the subject relative to an imaging zone of the medical imaging system; and
a computational system configured to control the medical system, wherein execution of the machine executable instructions causes the computational system to repeatedly receive the current image from the camera system, wherein execution of the machine executable instructions further causes the computational system to perform the following for the current image:
receive the set of current coordinates for each of the at least one set of predetermined coordinates in response to inputting the current image into the position identifying algorithm;
calculate a positional difference between the at least one set of predetermined coordinates and its set of current coordinates;
calculate a one-dimensional value for each of the at least one set of predetermined coordinates by inputting the positional difference for each of the at least one set of predetermined coordinates into an objective function; and
provide a one-dimensional position indicator for each of and controlled by each one-dimensional value in real time using the user interface.

2. The medical system of claim 1 , wherein the one-dimensional position indicator for each of the at least one set of predetermined coordinates is adapted to provide real time feedback on the alignment of the object to the at least one set of predetermined object coordinates.

3. The medical system of claim 1 , wherein execution of the machine executable instructions further causes the computational system to:
receive an imaging protocol selection;
retrieve a set of positioning instruction steps for positioning the subject by querying a database with the imaging protocol selection, wherein the set of positioning instructions steps describe a predetermined sequence of positioning instructions, wherein at least one of the sequence of positioning instruction steps comprises the at least one set of predetermined coordinates;
provide the predefined sequence of positioning instructions using the user interface; and
monitor subject motion during providing the predefined sequence of positioning instructions, wherein the one-dimensional position indicator is provided in real time for the at least one of the predefined sequence of positioning instructions, wherein the one-dimensional position indicator is preferably provided in real time after the subject motion is descriptive of a failure to successfully complete the at least one of the predefined sequence of positioning instructions.

4. The medical system of claim 3 , wherein execution of the machine executable instructions further causes the computational system to:
provide a success indicator indicating positioning after each of the predefined sequence of positioning instructions if the set of current coordinates satisfy a predefined criterion; and
remove a success indicator if the set of current coordinates no longer satisfy the predefined criterion.

5. The medical system of claim 1 , wherein the user interface is configured to provide at least one of the one-dimensional position indicator for each of the at least one set of predetermined coordinates as a haptic signal.

6. The medical system of claim 1 , wherein the user interface is configured to provide at least one of the one-dimensional position indicator for each of the at least one set of predetermined coordinates as an audio signal.

7. The medical system of claim 6 , wherein the audio signal comprises at least one of the following: an amplitude change, a pitch change, a timbre change, or a change in a stereo audio location.

8. The medical system of claim 1 , wherein the user interface is configured to provide at least one of the one-dimensional position indicator for each of the at least one set of predetermined coordinates as a visual position indicator on a display, wherein the visual position indicator is at least one of the following: an object location along a predetermined path, a rotational position, an object size, or a color change.

9. The medical system of claim 1 , wherein the position identifying algorithm is configured to output the set of current coordinates using at least one of the following:
a template based matching algorithm;
a pictorial structure model with a joint likelihood maximization algorithm;
probabilistic boosting tree algorithm;
a trained neural network; or
parameterized deformable model.

10. A method of operating a medical system, wherein the method comprises repeatedly receiving a current image from a camera system, wherein the method further comprises performing the following for the current image:
receiving a set of current coordinates for each of the at least one set of predetermined coordinates in response to inputting the current image into a position identifying algorithm, wherein the position identifying algorithm is configured for outputting the set of current coordinates for each of the at least one set of predetermined coordinates in response to receiving a current image descriptive of an object;
calculating a positional difference between the at least one set of predetermined coordinates and its set of current coordinates;
calculating a one-dimensional value for each of the at least one set of predetermined coordinates by inputting the positional difference for each of the at least one set of predetermined coordinates into an objective function; and
providing a one-dimensional position indicator for each of and controlled by each one-dimensional value in real time using a user interface that comprises a display,
obtaining images with a medical imaging system, wherein the medical imaging system is at least one of the following: an x-ray system, a digital fluoroscope, a magnetic resonance imaging system, a diagnostic ultrasound system, a computed tomography system, a positron emission tomography system, or a single photon emission tomography system, wherein each of the at least one set of predetermined coordinates defines a three-dimensional position and orientation of a body part of the subject relative to an imaging zone of the medical imaging system.

11. The method of claim 10 , further comprising:
receiving an imaging protocol selection;
retrieving a set of positioning instruction steps for positioning the subject by querying a database with the imaging protocol selection, wherein the set of positioning instructions steps describe a predetermined sequence of positioning instructions, wherein at least one of the sequence of positioning instruction steps comprises the at least one set of predetermined coordinates;
providing the predefined sequence of positioning instructions using the

Assignees

• Koninklijke Philips Nv

Inventors

• Talgorn Elise Claude Valentine
• Hendriks Monique
• Djajadiningrat Tomq
• Laute Niels
• Knoester Jaap
• LEE Hyelin
• Bosman Reinoud

Classifications

• G06T2207/30004

  Biomedical image processing · CPC title

• A61B8/461

  Displaying means of special interest · CPC title

• A61B6/547

  involving tracking of position of the device or parts of the device · CPC title

• A61B6/461

  Displaying means of special interest · CPC title

• G06T7/70

  Determining position or orientation of objects or cameras (camera calibration G06T7/80) · CPC title