# US 11,896,404 B2 · Systems and methods for medical imaging of a heart and analysis of ECG target channel

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- Number: US 11,896,404 B2
- Document ID: US11896404B2
- Status: Granted
- Kind: B2
- Application number: 17/138,962
- Filed: 2020-12-31
- Published: 2021-04-29
- Granted: 2024-02-13
- Earliest claimed: 2019-12-31
- Assignees: Shanghai United Imaging Healthcare Co., Ltd.
- Applicants: Shanghai United Imaging Healthcare Co., Ltd.
- Inventors: Xiang Xia; Zhongling Guan; Zhaolong Zeng
- Web page: https://patentgrep.com/patent/US11896404B2

## CPC

- A61B 5/7285: {for synchronizing or triggering a physiological measurement or image acquisition with a physiological event or waveform, e.g. an ECG signal}
- A61B 6/541: {involving acquisition triggered by a physiological signal}
- A61B 5/31: for electroencephalography [EEG]
- A61B 5/33: specially adapted for cooperation with other devices
- A61B 5/347: Detecting the frequency distribution of signals
- A61B 5/349: Detecting specific parameters of the electrocardiograph cycle
- A61B 6/03: Computed tomography [CT]
- A61B 6/503: {for diagnosis of the heart}
- A61B 6/5288: {involving retrospective matching to a physiological signal}
- A61B 8/5284: {involving retrospective matching to a physiological signal}
- G06T 12/20: Inverse problem, i.e. transformations from projection space into object space
- A61B 5/352: Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
- A61B 5/7225: {Details of analogue processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation (input circuits for detecting, measuring, or recording bioelectric or biomagnetic signals A61B5/30; specific diagnostic methods using bioelectric or biomagnetic signals A61B5/316)}
- A61B 6/032: {Transmission computed tomography [CT]}
- A61B 6/037: {Emission tomography}
- A61B 6/4417: {related to combined acquisition of different diagnostic modalities}
- A61B 6/4447: {Tiltable gantries}
- A61B 8/0883: {for diagnosis of the heart}
- G06T 2210/41: Medical
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

The present disclosure provides systems and methods for medical imaging. The method may include obtaining a plurality of channels of electrocardiogram (ECG) signals of a heart of a subject; identifying, from the plurality of channels of ECG signals, a target channel of ECG signal, wherein an amplitude of a characteristic wave of the target channel of ECG signal is the maximum amplitude among amplitudes of corresponding characteristic waves of the plurality of channels of ECG signals; and causing, based on the target channel of ECG signal, an imaging device to perform a scan operation on the heart of the subject.

## Claims

### Claim 1

A system for medical imaging, comprising:
at least one storage device storing executable instructions, and at least one processor in communication with the at least one storage device, when executing the executable instructions, causing the system to perform operations including: obtaining a plurality of channels of electrocardiogram (EGG) signals of a heart of a subject, the plurality of channels of EGG signals includes a predetermined channel of EGG signal;
switching the predetermined channel to a target channel when the predetermined channel of EGG signal is detected to be unavailable in a scan operation, wherein the switching the predetermined channel to a target channel when the predetermined channel of ECG signal is detected to be unavailable in a scan operation includes;
identifying, from the plurality of channels of ECG signals, the target channel of ECG signal;
switching the predetermined channel to the target channel when the predetermined channel of ECG signal is detected to be unavailable in a scan operation; wherein the identifying, from the plurality of channels of ECG signals, the target channel of EGG signal includes;
performing a preprocessing operation on each of the plurality of channels of EG signals; and
determining, from the plurality of channels of preprocessed EGG signals, the target channel of EGG signal;
wherein an amplitude of a characteristic wave of the target channel of EGG signal is the maximum amplitude among amplitudes of corresponding characteristic waves of the plurality of channels of EGG signals—and causing, based on the switched channel of EGG signal, an imaging device to perform the scan operation on the heart of the subject.

### Claim 2 (depends on 1)

The system of claim 1, wherein the preprocessing operation includes at least one of an amplifying operation or a filtering operation.

### Claim 3 (depends on 1)

The system of claim 1, wherein the causing, based on the switched channel of ECG signal, an imaging device to perform the scan operation on the heart of the subject includes:
generating, based on the switched channel of ECG signal, a gating signal; and
causing, based on the gating signal, the imaging device to perform the scan operation on the heart of the subject.

### Claim 4 (depends on 3)

The system of claim 3, wherein the generating, based on the switched channel of ECG signal, a gating signal includes:
detecting the characteristic wave of the switched channel of ECG signal; and
generating, based on the characteristic wave of the switched channel of ECG signal, the gating signal.

### Claim 5 (depends on 3)

The system of claim 3, wherein the at least one processor is further configured to cause the system to perform additional operations including:
determining, based at least in part on the plurality of channels of ECG signals, a heart disorder of the heart; and
determining, based on the heart disorder of the heart, a target time phase;
determining, based on the target time phase, a gating delay and a gating width; and
the causing, based on the gating signal, the imaging device to perform the scan operation on the heart of the subject includes:
causing, based on the gating signal, the gating delay, and the gating width, the imaging device to perform the scan operation on the heart of the subject.

### Claim 6 (depends on 5)

The system of claim 5, wherein the determining, based on the heart disorder of the heart, a target time phase includes:
querying a library based on the heart disorder of the heart to obtain a query result, the library including a relationship between the heart disorder of the heart and the target time phase; and
determining the target time phase based on the query result.

### Claim 7 (depends on 5)

The system of claim 5, wherein the determining, based on the target time phase, a gate delay and a gating width includes:
obtaining a plurality of durations corresponding to a plurality of previous cardiac cycles before a current cardiac cycle;
determining an average duration of the plurality of durations corresponding to the plurality of previous cardiac cycles; and
determining, based on the average duration and the target time phase, the gating delay and the gating width.

### Claim 8 (depends on 5)

The system of claim 5, wherein the at least one processor is further configured to cause the system to perform additional operations including:
obtaining a plurality of channels of second ECG signals monitored during the scan operation;
determining, based at least in part on the second ECG signals, an updated heart disorder of the heart; and
updating, based on the updated heart disorder of the heart, the target time phase.

### Claim 9 (depends on 1)

The system of claim 1, wherein a retrospective ECG gating is used in the scan operation, and the at least one processor is further configured to cause the system to perform additional operations including:
obtaining scan data generated in the scan operation;
obtaining, from the switched channel, a second ECG signal monitored during the scan operation; and
reconstructing a cardiac image based on the scan data and the second ECG signal.

### Claim 10 (depends on 1)

The system of claim 1, wherein a retrospective ECG gating is used in the scan operation, and the at least one processor is further configured to cause the system to perform additional operations including:
obtaining scan data generated in the scan operation;
obtaining a plurality of channels of second ECG signals monitored during the scan operation; and
reconstructing a cardiac image based on the scan data and the second ECG signals.

### Claim 11 (depends on 10)

The system of claim 10, wherein the reconstructing a cardiac image based on the scan data and the second ECG signals includes:
determining, based at least in part on the second ECG signals, a heart disorder of the heart;
determining, based on the heart disorder of the heart, a target time phase;
determining, from the scan data, target scan data corresponding to the target time phase; and
reconstructing, based on the target scan data, the cardiac image.

### Claim 12 (depends on 1)

The system of claim 1, wherein the at least one processor is further configured to cause the system to perform additional operations including:
obtaining a plurality of channels of second ECG signals monitored during the scan operation;
determining, based on the second ECG signals, an updated channel of ECG signal; and
operating, based on the updated channel of ECG signal, the imaging device to perform the scan operation on the heart.

### Claim 13 (depends on 12)

The system of claim 12, wherein the at least one processor is further configured to cause the system to perform additional operations including:
prompting a user that the channel of ECG signal is updated.

### Claim 14 (depends on 1)

The system of claim 1, wherein the plurality of channels of electrocardiogram (ECG) signals are detected by a multi-lead sensing device.

### Claim 15 (depends on 14)

The system of claim 14, wherein the multi-lead sensing device includes one or more electrodes, at least one of the one or more electrodes includes an electrode clamp and an electrode wire, wherein:
the electrode wire is winded to form one or more first coils and one or more second coils, a first winding direction of each of the one or more first coils being different from a second winding direction of each of the one or more second coils.

### Claim 16 (depends on 5)

The system of claim 5, wherein the determining, based at least in part on the plurality of channels of ECG signals, a heart disorder of the heart includes:
determining one or more features of the plurality of channels of ECG signals; and
determining, based on the one or more features, the heart disorder of the heart.

### Claim 17 (depends on 16)

The system of claim 16, wherein the determining, based on the one or more features, the heart disorder of the heart includes:
querying a library including a relationship between the one or more features and one or more heart disorders based on the one or more features; or
determining the heart disorder based on a heart disorder identification model.