CN101261829B - Noise restraint method for execution device of electronic medical treatment system and its electronic medical treatment system - Google Patents
Noise restraint method for execution device of electronic medical treatment system and its electronic medical treatment system Download PDFInfo
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- CN101261829B CN101261829B CN2007100642677A CN200710064267A CN101261829B CN 101261829 B CN101261829 B CN 101261829B CN 2007100642677 A CN2007100642677 A CN 2007100642677A CN 200710064267 A CN200710064267 A CN 200710064267A CN 101261829 B CN101261829 B CN 101261829B
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Abstract
The invention relates to the field of electronic medical equipment and aims at solving the problem that the communication between the operator and the patient is affected by the noise of the actuating unit of a present electronic medical system. The invention provides a method for suppressing the noise of the actuating unit of the electronic medical system and the electronic medical system. The method of the invention includes the following steps: step 1. pre-store noise-suppressing source data corresponding to each operation characteristic value in a noise-suppressing unit; step 2. the noise-suppressing unit obtains the operation characteristic values of the actuating unit in real-time and match the operation characteristic values with the noise-suppressing source data; step 3. generate noise-suppressing source according to the noise-suppressing source data; step 4. play the noise-suppressing source by a speaker so as to lead two sound waves to be offset with each other. The method and the system have the beneficial effect that the noise-suppressing source can be generated rapidly to suppress the noise of a side where the actuating unit is positioned, can guarantee the communication between the operator and the patient and reduce the influence on the mood of the patient caused by the noise of the actuating unit.
Description
Technical field
The present invention relates to the electromedical equipment field, particularly medical examination system is noise restraint method and this electronic medical system of execution device of electronic medical treatment concretely.
Background technology
Along with the raising of people's economic level, computer x-ray layer radiography (CT), magnetic resonance system large medical equipments such as (MRI) popularize and people to the enhancing of medical examination understanding of importance, it is more and more to require to carry out the people that medical imaging such as CT checks.With the CT system is example, and when when checking, the patient is scanned in the scanning room, and operator's (being generally the doctor) controls this CT machine in the pulpit, is like this to come to harm in order to prevent that the operator is under the X ray for a long time.In order to prevent the injury of X ray to the operator, generally all have very thick wall and glass between scanning room and the pulpit, caused influence to exchanging between operator and the patient like this.The scheme that addresses this problem at present is, in the scanning room one microphone being installed uses to the patient, in the pulpit one loudspeaker is installed and is used to the operator, perhaps the communicator in scanning room and pulpit all is two-way, can allow patient and operator carry out interactively communication.But when the frame of CT scan end can produce certain noise in adding the process of looking into, for example, the noise that the noise that the frame cooling fan rotate to produce, frame produce when rotate the noise that produces and electrical equipment work in scanning process, the interior noise of general CT Scan Room is approximately 67db.Work along with chassis equipment, the intensity of noise, frequency also change thereupon, for example, and the electromagnetic noise of frame standby when scanography does not also begin, the electromagnetic noise when preparing to detect and the noise of rotary frame, the electromagnetic noise when detection is carried out and the noise of rotary frame.Wherein, electromagnetic energy is strengthened also increase thereupon of noise during exposure, the variation of frame rotational speed also causes the variation of noise, and the electromagnetic noise of the noise of frame and exposure is all inequality when each different body position of scanning, but the noise that is produced in scanning process all can influence the communication between patient and the operator, and the patient is in harmful effect such as can cause that the patient feels out of one's plate in such noise for a long time.For example, revolving the time of turning around in the time of the scanning of CT frame conducting transmission line was 1 second, and revolving the time of turning around when carrying out heart scanning is 0.33 second, and the noise that the time of rotation, short frame produced more is also just big more.The energy of similar X ray exposure is also inequality in different application, and it is big that noise becomes along with the increase of exposure energy.Setting (rotational time, exposure energy etc.) at the health different parts in existing system also has a lot.
Also have a lot of technology of separating voice signal in the prior art, for example, Chinese patent application " 200610059490.8 " discloses a kind of signal handling equipment harmony signal processing method, can separate different sources of sound by this method in some specific admixtures source of sound together.Though this scheme can obtain the required sound source data of system, but can not abate the noise, if the user is in the noisy environment, still to stand the influence that noise brings.
Also have some to suppress the technology of noise in the prior art, for example, Chinese patent " 02227931.8 " discloses a kind of de-noising earphone and has comprised microphone, the gain compensation amplifier on the pcb board, phase compensation amplifier, wave filter and reverse driven, loudspeaker; By gathering noise and oppositely generating the reverse noise that intensity is identical, phase place is opposite, utilize this reverse noise suppression ambient noise, two sound waves are cancelled out each other, thereby reach the purpose of de-noising.But extraneous noise source is a lot, alters a great deal, and this effect that abates the noise dynamically is limited.
Summary of the invention
In order to overcome the above problems, the object of the present invention is to provide a kind of method that suppresses the execution device of electronic medical treatment noise, can utilize the anti-phase noise of generation to suppress the electromagnetic noise and/or the mechanicalness noise of actuating unit place side fast.
And a kind of electronic medical system with noise suppression unit is provided, can reduce or eliminate the electromagnetic noise and/or the mechanicalness noise of execution device of electronic medical treatment fast.
A kind of method that suppresses the execution device of electronic medical treatment noise, the control device of electronic medical system is controlled described actuating unit by the setting operation eigenwert, may further comprise the steps: step 1, storage and the corresponding noise suppression sound source data of each described operating characteristics value on the noise suppression unit, described noise suppression sound source data comprises the intensity and the frequency of noise suppression source of sound, and the intensity of described noise suppression source of sound and frequency when carrying out described operating characteristics value with described actuating unit respectively noise generated intensity, frequency identical; Step 2, when the running of described actuating unit, described noise suppression unit obtains the operating characteristics value of described actuating unit in real time, and retrieve corresponding noise suppression sound source data according to described operating characteristics value, described operating characteristics value comprises the residing duty of described actuating unit, and/or make described actuating unit produce the operating parameter of different noises, described duty comprises at least, for example, holding state, standby condition, running status, done state, described actuating unit produces different noises under every kind of described state; Step 3 generates the noise suppression source of sound according to the described noise suppression sound source data that retrieves, and the noise generated phase place of the phase place of described noise suppression source of sound and described actuating unit is opposite; Step 4, by this noise suppression source of sound of described loudspeaker plays, the noise that described noise suppression source of sound and described actuating unit are produced offsets, to suppress the noise of described actuating unit.
According to the further aspect of the inventive method, also comprise step 5, carry out audio-frequency information behind the noise suppression by at least one the audio collecting device collection that is positioned at described actuating unit side, whether judge this audio-frequency information, if greater than this threshold value then enter step 6 greater than a threshold value; Otherwise return the broadcast that step 4 keeps current noise suppression source of sound; Step 6 presents described audio-frequency information to described noise suppression unit, carries out the adjusting of noise suppression source of sound by this noise suppression unit, and returns step 3 and generate new noise suppression source of sound and send described loudspeaker to.
According to the inventive method further aspect again, in described step 2, after described noise suppression unit obtains the operating characteristics value of described actuating unit in real time, comprise that also one obtains the step of the beginning and ending time of described actuating unit running, the phase place of regulating described noise suppression source of sound according to described zero-time is opposite with described noise phase place, stops to produce the noise suppression source of sound according to described stand-by time.
According to another further aspect of the inventive method, described electronic medical system is computed tomography imaging system or magnetic resonance imaging system.
A kind of electronic medical system with noise suppression unit comprises actuating unit; With described actuating unit separate control means, control this actuating unit by the setting operation eigenwert patient is carried out medical imaging or treatment; At least one loudspeaker is positioned at described actuating unit side playback of audio information; The described noise suppression unit of drawing together is connected with described loudspeaker, be stored at least one noise suppression sound source data of described noise suppression unit in advance according to described operating characteristics value retrieval, described noise suppression sound source data comprises the intensity and the frequency of noise suppression source of sound, and the generation noise suppression source of sound opposite with described noise phase place, send described loudspeaker to and play.
The further aspect of system according to the invention, described noise suppression unit is connected with described control device, obtains described operating characteristics value from described control device.The perhaps described unit of making an uproar is connected with described actuating unit, obtains described operating characteristics value from described actuating unit.
System according to the invention is a further aspect again, and noise intensity, frequency that the intensity of the noise suppression source of sound of described noise suppression unit and frequency produce when carrying out described operating characteristics value with described actuating unit respectively are identical.
System according to the invention is a further aspect again, also comprises at least one audio collecting device; Described audio collecting device is connected with described noise suppression unit, and the audio-frequency information of described actuating unit side is imported described noise suppression unit, is adjusted the noise suppression source of sound of exporting to described loudspeaker by described noise suppression unit.
Another further aspect of system according to the invention, described electronic medical system are computed tomography imaging system or magnetic resonance imaging system.
Beneficial effect of the present invention is, can generate the noise suppression source of sound fast, in order to suppress the noise of actuating unit place side, guarantees exchanging between operator and the patient, reduces the influence of the noise of actuating unit to patient's mood.
Description of drawings
Fig. 1 suppresses the process flow diagram of execution device of electronic medical treatment noise for the present invention
Fig. 2 is a noise suppression cellular construction synoptic diagram of the present invention;
Fig. 3 suppresses the system architecture synoptic diagram of CT scan frame noise for the present invention;
Fig. 4 is CT scan frame noise of the present invention and noise suppression noise superposition synoptic diagram.
Embodiment
Below, carry out following detailed description for the present invention in conjunction with the accompanying drawings.
At specific electronic medical system, particularly in the detection system, noise source is all fixed, actuating unit all has certain noise output at different detection-phases and detection position, so, the present invention utilize this specific character with detection system at the noise data in each stage and/or the noise data when carrying out different operating note, and when detection system is worked, produce another noise to suppress electromagnetism and/or the mechanicalness noise that said system produces.
The present invention can be applied among the multiple electromedical equipment, NMR system for example, and medical examination systems such as CT system below are that example describes with the CT system only.
Figure 1 shows that the noise restraint method of electronic medical system of the present invention.The operating characteristics value operation that the actuating unit of electronic medical system is set according to control device, step 1 is stored the noise suppression sound source data corresponding to the different operating eigenwert in advance in the noise suppression unit.Described eigenwert comprises: the operating parameter of described actuating unit, actuating unit when executable operations because different operating parameter produces different noises; Perhaps described eigenwert is the duty of current actuating unit, and frequency noise, intensity that described actuating unit is produced under different duties all are not quite similar.The intensity of described noise suppression sound source data, frequency and described noise intensity, frequency are basic identical.Step 2, the noise suppression unit calls the noise suppression sound source data according to the real-time operating characteristics value of actuating unit.Step 3, the noise suppression unit generates the noise suppression source of sound according to the noise suppression sound source data that calls, and the phase place of this noise suppression source of sound is opposite with the phase place of noise.Step 4 by this noise suppression source of sound of described loudspeaker plays, produces identically with actuating unit side frequency noise, intensity, and the noise that phase place is opposite is in order to the noise of inhibition actuating unit.In order better to regulate the effect of noise suppression noise, also comprise step 5, gather the indoor real-time noise of actuating unit, with this noise and a threshold value relatively, if real-time noise is greater than threshold value then forward step 6 to; Otherwise continue to play current noise suppression noise and get back to step 4.Step 6, utilize the phase place and the intensity of the adjustment module adjusting noise suppression source of sound of noise suppression unit, for example shift to an earlier date 1/8 phase place or postpone 1/8 phase place, increase the intensity of noise suppression source of sound or reduce the intensity of noise suppression source of sound, these two kinds of regulating measures can adopt common fine setting means, and get back to step 3, regenerate the noise suppression noise.Above-mentioned operating characteristics value can comprise that the every parameter that may produce noise during the scanning gantry operation refers to frame rotational time and X ray exposure energy etc., and the noise suppression unit produces the noise suppression source of sound with respect to different parameters, to alleviate the noise in the scanning room; The perhaps current present state of scanning gantry, comprise holding state, standby condition, running status, done state, because frame all has metastable noise source at each state, just can suppress main noise so produce different noise suppression sources of sound according to each state, alleviate the noise in the scanning room.
As preferred embodiment, the inventive method comprises that also one obtains the step of the beginning and ending time of described actuating unit running in step 2, the phase place of regulating described noise suppression source of sound according to described zero-time is opposite with described noise phase place, stops to produce the noise suppression source of sound according to described stand-by time.
Shown in Figure 2, be the structural representation of noise suppression of the present invention unit.Dotted line is represented to be connected with this noise suppression unit, but does not belong to the device or the module of noise suppression unit.This noise suppression unit comprises storer, be used to store described operating characteristics value and at least one noise suppression sound source data corresponding with it, described noise suppression sound source data comprises the intensity and the frequency of noise suppression source of sound, and noise intensity, frequency that the intensity of described noise suppression source of sound and frequency produce when carrying out described operating characteristics value with described actuating unit respectively are identical; Retrieval module is connected with described storer, is used for retrieving described noise suppression sound source data according to described operating characteristics value; Module taking place, be connected with described retrieval module, be used for producing the noise suppression source of sound opposite with described noise phase place according to described noise suppression sound source data, and sends described loudspeaker to and play.Also comprise adjustment module as preferred embodiment, an end is connected with described generation module, and an end is connected with described audio collecting device, analyzes to obtain real-time noise data, adjusts the noise suppression source of sound that module is sent takes place.
Be illustrated in figure 3 as first embodiment of the invention system architecture synoptic diagram.System of the present invention comprises, CT control device, CT scan frame, audio collecting device, loudspeaker, noise suppression unit.Described CT control device is positioned at the pulpit, and described CT scan frame is positioned at the scanning room, the described CT scan frame of described CT control device remote control.Described audio collecting device is positioned at the scanning room, gather patient's voice signal in the prior art and be sent to the pulpit, the operator is known, in the present invention also the noise that produces of acquisition scans frame, for example electromagnetic noise and/or mechanicalness noise of this audio collecting device.Described loudspeaker is positioned at the scanning room, so that the operator who is positioned at the pulpit is to the patient's transfers voice information that is positioned at the scanning room, in the present invention, this loudspeaker also transmits the noise suppression source of sound.Described noise suppression unit is connected with described CT control device, accepts the control of CT control device, according to the operating characteristics value generation noise suppression source of sound of described CT control device.Described noise suppression unit is connected with described loudspeaker, uses described loudspeaker to broadcast the noise suppression source of sound.When system works of the present invention, CT control device control CT scan frame, and the operating parameter of setting current C T scanning gantry operation, frame rotational time for example, exposure intensity, or the residing duty of current C T scanning gantry etc., described noise suppression unit obtains the operating characteristics value that current scanning gantry carries out from described CT control device, the noise suppression unit calls the noise suppression sound source data that is stored in advance on this noise suppression unit according to described operating characteristics value and produces the noise suppression source of sound, promptly the current operation of doing produces the noise suppression source of sound according to scanning gantry, the noise of this current operation comprises electromagnetic noise and/or frame Rotation Noise, the intensity of this noise suppression sound source data, the intensity of frequency and described noise, frequency is equal substantially, the noise suppression source of sound that produces is except having above-mentioned intensity, outside the frequency, phase place is opposite with the phase place of described noise, as shown in Figure 4.Again this noise suppression source of sound is sent to coupled loudspeaker, broadcast the noise suppression source of sound by this loudspeaker, the noise that suppresses scanning gantry, noise in the whole scanning room is reduced, because the frequency of voice signal is different with electromagnetic noise and/or frame Rotation Noise frequency, so can the voice signal between operator and the patient not had much impact.
As preferably, above-mentioned noise suppression unit is positioned at the scanning room, does not link with control device, but is connected with described actuating unit, from this device acquisition operating characteristics value.
As preferably, described audio collecting device is connected with described noise suppression unit, real-time transmit noise in the current scanning room to described noise suppression unit, described noise suppression unit has regulatory function, according to the real-time collection result of described audio collecting device, adjust the phase place of the reverse noise suppression source of sound of this noise suppression unit generation, parameters such as intensity, if the indoor noise of the reading scan as a result of described audio collecting device collection does not reduce or is not reduced to predetermined threshold, phase place and intensity that reverse noise suppression source of sound then is described may be inaccurate, at first regulate the phase place of reverse noise suppression source of sound, shift to an earlier date or postpone certain phase place and pass through loudspeaker plays, regulate the intensity of reverse noise suppression source of sound then, to improve the noise suppression effect.
As preferably using a plurality of loudspeakers in the scanning room, to play the noise suppression source of sound, so that better noise suppression effect to be provided.Perhaps use a plurality of audio collecting devices to strengthen the accuracy of noise signal.
Beneficial effect of the present invention is, can eliminate or weaken indoor electromagnetism in execution device of electronic medical treatment place and/or mechanicalness noise, reduce the influence of noise to linking up between patient and the operator, and can make the residing testing environment of patient relatively quieter, reduce the influence of noise patient's mood.Owing to the reduction of noise, the operator can accurately clearly listen to the information from patient simultaneously, can react in time in patient in emergency circumstances (for example allergic reaction or discomfort), reduces risk.System and method of the present invention can generate the noise suppression noise fast, and relatively accurately.
Above embodiment only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (9)
1. method that suppresses the execution device of electronic medical treatment noise, the control device of electronic medical system is controlled described actuating unit by the setting operation eigenwert, it is characterized in that may further comprise the steps:
Step 1, storage and the corresponding noise suppression sound source data of each described operating characteristics value on the noise suppression unit, described noise suppression sound source data comprises the intensity and the frequency of noise suppression source of sound, and the intensity of described noise suppression source of sound and frequency when carrying out described operating characteristics value with described actuating unit respectively noise generated intensity, frequency basic identical;
Step 2, when the running of described actuating unit, described noise suppression unit obtains the operating characteristics value of described actuating unit in real time, and retrieves corresponding noise suppression sound source data according to described operating characteristics value;
Step 3 generates the noise suppression source of sound according to the described noise suppression sound source data that retrieves, and the noise generated phase place of the phase place of described noise suppression source of sound and described actuating unit is opposite;
Step 4, by this noise suppression source of sound of loudspeaker plays, the noise that described noise suppression source of sound and described actuating unit are produced offsets, to suppress the noise of described actuating unit;
Step 5, carry out audio-frequency information behind the noise suppression by at least one the audio collecting device collection that is positioned at described actuating unit side, whether judge this audio-frequency information greater than a threshold value,, otherwise return the broadcast that step 4 keeps current noise suppression source of sound if greater than this threshold value then enter step 6;
Step 6 presents described audio-frequency information to described noise suppression unit, by this noise suppression unit the intensity and/or the phase place of described noise suppression source of sound is regulated, and returns step 3 and generate new noise suppression source of sound and send described loudspeaker to.
2. the method for inhibition execution device of electronic medical treatment noise according to claim 1, it is characterized in that, in described step 2, after described noise suppression unit obtains the operating characteristics value of described actuating unit in real time, comprise that also one obtains the step of the beginning and ending time of described actuating unit running, the phase place of regulating described noise suppression source of sound according to zero-time is opposite with described noise phase place, stops to produce the noise suppression source of sound according to stand-by time.
3. the method for inhibition execution device of electronic medical treatment noise according to claim 1, it is characterized in that, described operating characteristics value comprises, residing duty of described actuating unit and/or inspection area operating parameter, described actuating unit produces different noises under described duty of difference and/or inspection area operating parameter.
4. the method for inhibition execution device of electronic medical treatment noise according to claim 3 is characterized in that described duty comprises holding state, standby condition, running status and done state at least.
5. the method for inhibition execution device of electronic medical treatment noise according to claim 1 is characterized in that, described electronic medical system is computed tomography imaging system or magnetic resonance imaging system.
6. the electronic medical system with noise suppression unit comprises: actuating unit; With described actuating unit separate control means, control this actuating unit by the setting operation eigenwert patient is carried out medical imaging or treatment; At least one loudspeaker is positioned at described actuating unit side playback of audio information;
It is characterized in that, described noise suppression unit is connected with described loudspeaker, at least one noise suppression sound source data that described noise suppression unit is stored in advance according to described operating characteristics value retrieval, described noise suppression sound source data comprises the intensity and the frequency of noise suppression source of sound, noise intensity and frequency that the intensity of described noise suppression source of sound and frequency produce when carrying out described operating characteristics value with described actuating unit respectively are basic identical, and described noise suppression unit also generates the noise suppression source of sound opposite with described noise phase place, sends described loudspeaker to and plays;
Described electronic medical system also comprises at least one audio collecting device, be connected with described noise suppression unit, the audio-frequency information of described actuating unit side is imported described noise suppression unit, if described audio-frequency information greater than a threshold value, is then adjusted the phase place and/or the intensity of the noise suppression source of sound of exporting to described loudspeaker by described noise suppression unit.
7. the electronic medical system with noise suppression unit according to claim 6 is characterized in that, described noise suppression unit is connected with described control device, obtains described operating characteristics value from described control device.
8. the electronic medical system with noise suppression unit according to claim 6 is characterized in that, described noise suppression unit is connected with described actuating unit, obtains described operating characteristics value from described actuating unit.
9. the electronic medical system with noise suppression unit according to claim 6 is characterized in that, described electronic medical system is computed tomography imaging system or magnetic resonance imaging system.
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| CN2007100642677A CN101261829B (en) | 2007-03-08 | 2007-03-08 | Noise restraint method for execution device of electronic medical treatment system and its electronic medical treatment system |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201943215U (en) * | 2010-12-29 | 2011-08-24 | 深圳市中资源科技发展有限公司 | Device for restraining outdoor noises in indoor space |
| CN103531195A (en) * | 2012-07-02 | 2014-01-22 | 华为技术有限公司 | Noise reduction method, equipment and system |
| CN104622470A (en) * | 2013-11-12 | 2015-05-20 | 西门子(深圳)磁共振有限公司 | Auxiliary hearing protection device and method |
| CN105989847A (en) * | 2015-01-27 | 2016-10-05 | 上海西门子医疗器械有限公司 | Noise reduction device with adaptive filter, and medical equipment |
| CN105989848A (en) * | 2015-01-30 | 2016-10-05 | 上海西门子医疗器械有限公司 | Noise reduction device and medical apparatus |
| CN106971707A (en) * | 2016-01-14 | 2017-07-21 | 芋头科技（杭州）有限公司 | The method and system and intelligent terminal of voice de-noising based on output offset noise |
| CN106205585B (en) * | 2016-07-28 | 2020-06-02 | 海信集团有限公司 | Noise elimination method and device |
| CN110033754A (en) * | 2018-01-11 | 2019-07-19 | 深圳市诚壹科技有限公司 | A kind of noise-reduction method, device, terminal device and computer readable storage medium |
| US11478211B2 (en) * | 2019-12-03 | 2022-10-25 | Shanghai United Imaging Healthcare Co., Ltd. | System and method for noise reduction |
| CN111785240B (en) * | 2020-08-03 | 2021-04-09 | 上海全景医学影像诊断中心有限公司 | Anti-phase interference filter active wave protection device for PET-MR working noise |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5313945A (en) * | 1989-09-18 | 1994-05-24 | Noise Cancellation Technologies, Inc. | Active attenuation system for medical patients |
| US5427102A (en) * | 1991-06-21 | 1995-06-27 | Hitachi, Ltd. | Active noise cancellation apparatus in MRI apparatus |
| CN1695551A (en) * | 2004-05-06 | 2005-11-16 | 通用电气公司 | System and method for reducing auditory perception of noise associated with a medical imaging process |
-
2007
- 2007-03-08 CN CN2007100642677A patent/CN101261829B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5313945A (en) * | 1989-09-18 | 1994-05-24 | Noise Cancellation Technologies, Inc. | Active attenuation system for medical patients |
| US5427102A (en) * | 1991-06-21 | 1995-06-27 | Hitachi, Ltd. | Active noise cancellation apparatus in MRI apparatus |
| CN1695551A (en) * | 2004-05-06 | 2005-11-16 | 通用电气公司 | System and method for reducing auditory perception of noise associated with a medical imaging process |
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