CN113786215A - Electrocardiogram mapping method based on electromechanical ultrasonic imaging - Google Patents
Electrocardiogram mapping method based on electromechanical ultrasonic imaging Download PDFInfo
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- 238000003384 imaging method Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000013507 mapping Methods 0.000 title claims abstract description 24
- 230000004913 activation Effects 0.000 claims abstract description 14
- 239000000523 sample Substances 0.000 claims description 50
- 230000007246 mechanism Effects 0.000 claims description 46
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 5
- 230000000747 cardiac effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 206010003119 arrhythmia Diseases 0.000 abstract description 7
- 230000006793 arrhythmia Effects 0.000 abstract description 5
- 238000007674 radiofrequency ablation Methods 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000002565 electrocardiography Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 3
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 2
- 206010003130 Arrhythmia supraventricular Diseases 0.000 description 2
- 206010003662 Atrial flutter Diseases 0.000 description 2
- 206010015856 Extrasystoles Diseases 0.000 description 2
- 208000000418 Premature Cardiac Complexes Diseases 0.000 description 2
- 206010047281 Ventricular arrhythmia Diseases 0.000 description 2
- 238000002679 ablation Methods 0.000 description 2
- 230000037005 anaesthesia Effects 0.000 description 2
- 230000001746 atrial effect Effects 0.000 description 2
- 206010003668 atrial tachycardia Diseases 0.000 description 2
- 238000002591 computed tomography Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 238000012285 ultrasound imaging Methods 0.000 description 2
- 230000002861 ventricular Effects 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 206010007625 cardiogenic shock Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002595 magnetic resonance imaging Methods 0.000 description 1
- 210000004165 myocardium Anatomy 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0883—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of the heart
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
Abstract
The invention discloses an electrocardio mapping method based on electromechanical wave ultrasonic imaging, which comprises the following steps: s1: firstly, carrying out high-frame-frequency ultrasonic scanning on a heart area of a patient along the direction a; s2: drawing an electromechanical activation image of the heart based on the high frame frequency result of the ultrasonic scanning; s3: displacing a preset distance along the direction b, distributing the direction b and the direction a in an included angle shape, and executing steps S1 and S2 until the preset scanning times are reached; s4: the imaging method provided by the invention not only can play a role in difficult arrhythmia cases, but also can predict the optimal part of the radio frequency ablation before operation, and no other imaging tools can do so clinically at present.
Description
Technical Field
The invention relates to the technical field of ultrasonic detection, in particular to an electrocardio mapping method based on electromechanical wave ultrasonic imaging.
Background
Cardiac arrhythmias are a leading cause of morbidity and mortality worldwide. While ultrasound is a known non-invasive, relatively cost-effective imaging modality, other non-invasive electronic mapping methods such as Electrocardiography (ECGI) provide high spatial resolution maps of arrhythmia-cardiogenic shock; however, this requires Computed Tomography (CT) or Magnetic Resonance Imaging (MRI), which may be ionizing or time consuming, to obtain the patient's heart geometry. ECGI is commonly applied to the epicardial surface, however, endocardial mapping remains a challenge.
The heart is an electrically driven organ, and electrical stimulation causes contraction and relaxation of the heart muscle, resulting in local contraction along its path, producing a rapid mechanical electrical wave (called simply an airwave), typically in the range of 0.5 to 7 m/s.
12-lead Electrocardiogram (ECG) is a currently non-invasive clinical tool for diagnosing and localizing arrhythmias. However, it has limited accuracy, cannot be used as an anatomical tool to intuitively locate the origin of arrhythmia, and interpretation of electrocardiography by different physicians may not be consistent. At present, no technical scheme can solve the problems at home.
Disclosure of Invention
In order to solve the technical problem, the invention provides an electrocardiogram mapping method based on electromechanical wave ultrasonic imaging, which comprises the following steps:
s1: firstly, carrying out high-frame-frequency ultrasonic scanning on a heart area of a patient along the direction a;
s2: drawing an electromechanical activation image of the heart based on the high frame frequency result of the ultrasonic scanning;
s3: displacing a preset distance along the direction b, distributing the direction b and the direction a in an included angle shape, and executing steps S1 and S2 until the preset scanning times are reached;
s4: and combining and correcting the multiple electromechanical activation images to obtain a final cardiac electromechanical activation image.
Preferably: in S3, the directions a and b are right-angled.
Preferably: in S3, the preset distance is the same for each displacement along the b direction.
Preferably: in S1, the height from the heart is consistent each time a region of the patient' S heart is scanned.
An examination device for an electrocardio mapping method based on electromechanical ultrasonic imaging comprises an examination bed, wherein a moving mechanism is arranged on one side of the examination bed, a lifting mechanism is arranged on the moving mechanism, an ultrasonic probe is arranged on the lifting mechanism, the moving mechanism is used for driving the lifting mechanism and the ultrasonic probe to move along the length direction of the examination bed, the lifting mechanism is used for adjusting the height of the ultrasonic probe, the ultrasonic probe is connected with an adjusting mechanism, and the adjusting mechanism is used for adjusting the position of the ultrasonic probe.
Preferably: the adjusting mechanism comprises a traversing component, an A adjusting component and a B adjusting component, the ultrasonic probe is installed on the A adjusting component, the A adjusting component is used for adjusting the ultrasonic probe to move along the direction B, the A adjusting component is installed on the B adjusting component, the B adjusting component is used for adjusting the ultrasonic probe to rotate around the length direction of the examination bed, the B adjusting component is installed on the traversing component, and the traversing component is used for adjusting the ultrasonic probe to move along the width direction of the examination bed.
Preferably: the A adjusting component is a screw rod nut mechanism, a screw rod in the screw rod nut mechanism is horizontally arranged, the length direction of the screw rod is consistent with the width direction of the inspection bed, and the ultrasonic probe is fixedly arranged on a nut in the screw rod nut mechanism.
Preferably: the B adjusting component comprises a rotating shaft, the A adjusting component is fixedly arranged on the rotating shaft, a worm wheel is fixedly arranged at one end of the rotating shaft, and the worm wheel is meshed with the worm.
Preferably: the transverse moving assembly comprises a supporting arm and a moving assembly, the supporting arm is horizontally arranged, the length direction of the supporting arm is consistent with the width direction of the examination bed, a rack is arranged on the supporting arm, the length direction of the rack is consistent with the length direction of the supporting arm, the moving assembly comprises a driving gear, and the driving gear is meshed with the rack.
Preferably: the ultrasonic probe is provided with an optical positioning probe, the examination starting position of the heart area of the patient is provided with a positioning trigger piece, and the positioning trigger piece is matched with the optical positioning probe.
The invention has the technical effects and advantages that: electromechanical Wave Imaging (EWI), an imaging technique based on high frame rate (not less than 2000HZ) ultrasound, can non-invasively map the electromechanical activation of the heart and accurately pinpoint the source of various atrial and ventricular arrhythmias, including ventricular premature beats, WPW syndrome, atrial tachycardia and atrial flutter, with diagnostic accuracy far exceeding that of conventional electrocardiograms. Unlike mechanical strain-based techniques such as Tissue Doppler Imaging (TDI) and Speckle Tracking Echocardiography (STE), EWI relies on incremental axial strain. EWI detected a small local contraction of about 0.01% and tracked the interframe axial displacement of about 0.01mm, while TDI used about 30% of the peak contraction longitudinal strain or the global region accumulated longitudinal strain throughout the contraction period. In addition, TDI is an angle-dependent technique, while EWI activation maps are angle-independent, relying on one-dimensional radio frequency signals for high-precision time-domain displacement estimation.
The imaging method provided by the invention can not only play a role in difficult arrhythmia cases, but also can predict the optimal part of the radio frequency ablation before operation, and no other imaging tools can do the same clinically at present;
using EWI as a clinical visualization tool in conjunction with electrocardiography and clinical workflow may improve patient discussion regarding treatment options and preoperative planning, and may reduce redundant ablation sites, extend procedure and anesthesia time;
one advantage of the EWI echocardiogram is that isochrones can more intuitively and clearly demarcate the earliest region of interest, while EWI imaging can provide 3D rendered anatomical information, and EWI isochrones can also be imported and overlaid onto existing three-dimensional electroanatomical mapping systems;
the EWI technology can be conveniently integrated into existing standard clinical ultrasound imaging systems without the need for additional hardware and without additional cost.
The examination device provided by the invention has the advantages of stable structure, reasonable layout, accurate position adjustment and capability of realizing the purpose of automatic ultrasonic detection and meeting the use requirement of electrocardio mapping based on electromechanical ultrasonic imaging.
Drawings
Fig. 1 is a schematic flow chart of an electrocardiographic mapping method based on electromechanical ultrasonic imaging according to the present invention.
Fig. 2 is a schematic structural diagram of an examination device for an electrocardiographic mapping method based on electromechanical ultrasonic imaging according to the present invention.
Fig. 3 is a schematic structural diagram of a B adjustment assembly in an examination apparatus for an electrocardiographic mapping method based on electromechanical ultrasonic imaging according to the present invention.
Description of reference numerals: 100. an examination bed; 200. a moving mechanism; 300. a lifting mechanism; 400. a traversing assembly; 410. a support arm; 420. a rack; 430. a moving assembly; 500. b, adjusting the component; 510. a rotating shaft; 520. a worm; 530. a worm gear; 600. a, adjusting a component; 700. an ultrasonic probe; 800. an optical positioning probe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Example 1
Referring to fig. 1, an electrocardiographic mapping method based on electromechanical ultrasonic imaging includes the following steps:
s1: firstly, carrying out high-frame-frequency ultrasonic scanning on a heart area of a patient along the direction a;
s2: drawing an electromechanical activation image of the heart based on the high frame frequency result of the ultrasonic scanning;
s3: displacing a preset distance along the direction b, distributing the direction b and the direction a in an included angle shape, and executing steps S1 and S2 until the preset scanning times are reached;
s4: and combining and correcting the multiple electromechanical activation images to obtain a final cardiac electromechanical activation image.
In S3, the directions a and b are right-angled.
In S3, the preset distance is the same for each displacement along the b direction.
In S1, the height from the heart is consistent each time a region of the patient' S heart is scanned.
Electromechanical Wave Imaging (EWI), an imaging technique based on high frame rate (not less than 2000HZ) ultrasound, can non-invasively map the electromechanical activation of the heart and accurately pinpoint the source of various atrial and ventricular arrhythmias, including ventricular premature beats, WPW syndrome, atrial tachycardia and atrial flutter, with diagnostic accuracy far exceeding that of conventional electrocardiograms. Unlike mechanical strain-based techniques such as Tissue Doppler Imaging (TDI) and Speckle Tracking Echocardiography (STE), EWI relies on incremental axial strain. EWI detected a small local contraction of about 0.01% and tracked the interframe axial displacement of about 0.01mm, while TDI used about 30% of the peak contraction longitudinal strain or the global region accumulated longitudinal strain throughout the contraction period. In addition, TDI is an angle-dependent technique, while EWI activation maps are angle-independent, relying on one-dimensional radio frequency signals for high-precision time-domain displacement estimation.
The imaging method can not only play a role in difficult arrhythmia cases, but also can predict the optimal part of the radio frequency ablation before the operation, and no other imaging tools can do the same clinically at present;
using EWI as a clinical visualization tool in conjunction with electrocardiography and clinical workflow may improve patient discussion regarding treatment options and preoperative planning, and may reduce redundant ablation sites, extend procedure and anesthesia time;
one advantage of the EWI echocardiogram is that isochrones can more intuitively and clearly demarcate the earliest region of interest, while EWI imaging can provide 3D rendered anatomical information, and EWI isochrones can also be imported and overlaid onto existing three-dimensional electroanatomical mapping systems;
the EWI technology can be conveniently integrated into existing standard clinical ultrasound imaging systems without the need for additional hardware and without additional cost.
Example 2
Referring to fig. 2 and 3, in the present embodiment, an examination apparatus for an electrocardiographic mapping method based on electromechanical ultrasonic imaging is provided, including an examination couch 100, a moving mechanism 200 is disposed on one side of the examination couch 100, a lifting mechanism 300 is mounted on the moving mechanism 200, an ultrasonic probe 700 is disposed on the lifting mechanism 300, the moving mechanism 200 is configured to drive the lifting mechanism 300 and the ultrasonic probe 700 to move along a length direction of the examination couch 100, the lifting mechanism 300 is configured to adjust a height of the ultrasonic probe 700, the ultrasonic probe 700 is connected to an adjusting mechanism, and the adjusting mechanism is configured to adjust a position of the ultrasonic probe 700.
The adjusting mechanism comprises a traversing assembly 400, an A adjusting assembly 600 and a B adjusting assembly 500, wherein the ultrasonic probe 700 is arranged on the A adjusting assembly 600, the A adjusting assembly 600 is used for adjusting the ultrasonic probe 700 to move along the direction B, the A adjusting assembly 600 is arranged on the B adjusting assembly 500, the B adjusting assembly 500 is used for adjusting the ultrasonic probe 700 to rotate around the length direction of the examination bed 100, the B adjusting assembly 500 is arranged on the traversing assembly 400, and the traversing assembly 400 is used for adjusting the ultrasonic probe 700 to move along the width direction of the examination bed 100.
The a adjusting assembly 600 is a lead screw-nut mechanism, a lead screw in the lead screw-nut mechanism is horizontally arranged, the length direction of the lead screw is consistent with the width direction of the examining table 100, and the ultrasonic probe 700 is fixedly installed on a nut in the lead screw-nut mechanism.
The B-adjusting assembly 500 comprises a rotating shaft 510, the a-adjusting assembly 600 is fixedly mounted on the rotating shaft 510, one end of the rotating shaft 510 is fixedly mounted with a worm gear 520, and the worm gear 520 is meshed with the worm 510.
The traverse assembly 400 includes a support arm 410 and a moving assembly 430, the support arm 410 is horizontally disposed, a length direction of the support arm 410 is identical to a width direction of the examination bed 100, a rack 420 is disposed on the support arm 410, a length direction of the rack 420 is identical to an arm length direction of the support arm 410, and the moving assembly 430 includes a driving gear engaged with the rack 420.
The ultrasonic probe 700 is provided with an optical positioning probe 800, the examination starting position of the heart region of the patient is provided with a positioning trigger, and the positioning trigger is matched with the optical positioning probe 800.
The moving mechanism 200 and the lifting mechanism 300 are both screw-nut mechanisms.
When the examination device provided by the embodiment is used, firstly, a patient lies on the examination bed 100, a positioning trigger is attached to the initial position of the heart of the patient, then each mechanism is started, the ultrasonic probe is moved above the positioning trigger, the positioning trigger triggers the optical positioning probe 800, the optical positioning probe 800 receives a signal, the a adjustment assembly 600 adjusts the ultrasonic probe 700 to displace a preset distance along the direction B, then the moving mechanism 200 adjusts the ultrasonic probe 700 to move along the length direction of the examination bed 100 to realize detection, after the ultrasonic probe 700 returns to the original position, the a adjustment assembly 600 adjusts the ultrasonic probe 700 to displace a preset distance along the direction B until a preset number of times is detected, it should be noted that in the detection process, the B adjustment assembly 500 adjusts the ultrasonic probe 700 to rotate an angle, so that the ultrasonic probe 700 always keeps a state perpendicular to the detection position, and the detection precision is improved.
The examination device provided by the invention has the advantages of stable structure, reasonable layout, accurate position adjustment and capability of realizing the purpose of automatic ultrasonic detection and meeting the use requirement of electrocardio mapping based on electromechanical ultrasonic imaging.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (10)
1. An electrocardio mapping method based on electromechanical wave ultrasonic imaging is characterized by comprising the following steps:
s1: firstly, carrying out high-frame-frequency ultrasonic scanning on a heart area of a patient along the direction a;
s2: drawing an electromechanical activation image of the heart based on the high frame frequency result of the ultrasonic scanning;
s3: displacing a preset distance along the direction b, distributing the direction b and the direction a in an included angle shape, and executing steps S1 and S2 until the preset scanning times are reached;
s4: and combining and correcting the multiple electromechanical activation images to obtain a final cardiac electromechanical activation image.
2. The method according to claim 1, wherein in S3, the a direction and the b direction are right-angled.
3. The method for mapping cardiac electricity based on ultrasonic imaging of electromechanical waves according to claim 1, wherein in S3, each displacement along the b direction is the same by a preset distance.
4. The method according to claim 1, wherein the elevation from the heart is consistent each time the region of the heart of the patient is scanned in S1.
5. The inspection device is characterized by comprising an inspection bed (100), wherein a moving mechanism (200) is arranged on one side of the inspection bed (100), a lifting mechanism (300) is arranged on the moving mechanism (200), an ultrasonic probe (700) is arranged on the lifting mechanism (300), the moving mechanism (200) is used for driving the lifting mechanism (300) and the ultrasonic probe (700) to move along the length direction of the inspection bed (100), the lifting mechanism (300) is used for adjusting the height of the ultrasonic probe (700), the ultrasonic probe (700) is connected with an adjusting mechanism, and the adjusting mechanism is used for adjusting the position of the ultrasonic probe (700).
6. The examination device for the electrocardiographic mapping method based on the electromechanical wave ultrasonic imaging according to claim 5, wherein the adjustment mechanism comprises a traverse assembly (400), an A adjustment assembly (600) and a B adjustment assembly (500), the ultrasonic probe (700) is mounted on the A adjustment assembly (600), the A adjustment assembly (600) is used for adjusting the ultrasonic probe (700) to move along the direction B, the A adjustment assembly (600) is mounted on the B adjustment assembly (500), the B adjustment assembly (500) is used for adjusting the ultrasonic probe (700) to rotate around the length direction of the examination table (100), the B adjustment assembly (500) is mounted on the traverse assembly (400), and the traverse assembly (400) is used for adjusting the ultrasonic probe (700) to move along the width direction of the examination table (100).
7. The examination device for the electrocardiographic mapping method based on the electromechanical ultrasonic imaging according to claim 6, wherein the adjustment assembly (600) is a screw-nut mechanism, a screw in the screw-nut mechanism is horizontally arranged, the length direction of the screw is consistent with the width direction of the examination bed (100), and the ultrasonic probe (700) is fixedly installed on a nut in the screw-nut mechanism.
8. The examination device for the electrocardiographic mapping method based on the electromechanical ultrasonic imaging according to claim 7, wherein the B adjustment assembly (500) comprises a rotating shaft (510), the a adjustment assembly (600) is fixedly installed on the rotating shaft (510), a worm wheel (520) is fixedly installed at one end of the rotating shaft (510), and the worm wheel (520) is engaged with the worm (510).
9. The examination device for the electrocardiographic mapping method based on the electromechanical ultrasonic imaging according to claim 8, wherein the traverse assembly (400) comprises a support arm (410) and a moving assembly (430), the support arm (410) is horizontally arranged, the length direction of the support arm (410) is consistent with the width direction of the examination bed (100), a rack (420) is arranged on the support arm (410), the length direction of the rack (420) is consistent with the arm length direction of the support arm (410), and the moving assembly (430) comprises a driving gear which is meshed with the rack (420).
10. The examination device for the electrocardiographic mapping method based on the electromechanical ultrasonic imaging according to claim 9, wherein the optical positioning probe (800) is mounted on the ultrasonic probe (700), the location trigger is mounted at the examination starting position of the heart region of the patient, and the location trigger is matched with the optical positioning probe (800).
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2021
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