I-Neural Implant Bona U
Imibhalo egcwele yezobuchwepheshe ku-visual cortical prosthesis, okuhlanganisa ukucaciswa kwehadiwe, izimiso eziyisisekelo zokuvuselela, ukwakheka kwesistimu, namanothi okuqalisa.
1. Isakhiwo sesistimu
1.1 Uhlolojikelele
Isistimu yokufakelwa kwe-See U neural yenziwe ngezingxenye ezintathu eziyinhloko ezisebenza ndawonye ukuze zithwebule, zicubungule, futhi zithumele ulwazi olubonakalayo ngqo ku-primary visual cortex.
Ingxenye yangaphandle
- • Ikhamera ye-CMOS (16MP)
- • Iyunithi yokucubungula
- • Ibhethri langaphandle (2500mAh)
- • I-RF Transmitter
Ingxenye engaphansi kwesikhumba
- • Isamukeli se-RF
- • Iphrosesa yesignali
- • Ibhethri elifakelwayo
- • Isilawuli se-Electrode
Ingxenye ye-Intracortical
- • I-1024-electrode array
- • I-substrate eguquguqukayo
- • I-Neural interface
- • Izinzwa ze-impedance
1.2 Ukugeleza kwedatha
Ukuthwebula isithombe
Ikhamera ye-CMOS ithwebula amafreyimu angama-60 FPS ku-1920x1080. Inzwa ezwela kakhulu (kufika ku-ISO 6400) isekela ukusebenza kokukhanya okuphansi.
Iyacubungula
Ama-algorithms okubona ngekhompyutha asebenzisa ukutholwa konqenqema, ukungafani okuguquguqukayo, nokunciphisa umsindo. Isithombe sehliselwe kumephu engu-32x32 kuyilapho kugcinwa ulwazi olubalulekile.
Imephu ye-retinotopic
Izixhumanisi zesithombe sendawo zidwetshwe ezindaweni ezihambisanayo ku-visual cortex, kulandela inhlangano yemvelo ye-V1 retinotopic.
Umbhalo wekhodi wesikhuthazo
Amaphethini we-pulse kagesi akhiqizwa ngamapharamitha alungiselelwe (amplitude, imvamisa, ubude besikhathi) ku-electrode ngayinye ngokusekelwe kubukhulu bephikseli obuhambisanayo.
Ukudluliswa kwe-RF
Idatha efakwe ikhodi ithunyelwa ngaphezulu kuka-13.56 MHz RF ngesikhumba kumamukeli ongaphansi kwesikhumba, ngokubambezeleka kokuphela ukuya ekupheleni ngaphansi kuka-50 ms.
Ukukhuthazwa kwemizwa
Isilawuli se-electrode sisebenzisa ama-biphasic pulses kuma-microelectrode, ukushayela ama-neuron athile kanye nama-phosphenes athokozisayo abonwa umsebenzisi.
2. Imininingwane yezingxenyekazi zekhompuyutha
2.1 Iyunithi yangaphandle
Ikhamera
Iphrosesa
Amandla
2.2 Iyunithi efakelwayo
Isamukeli se-RF
Iphrosesa yesignali
Ibhethri elifakelwayo
Ubukhulu bomzimba
3. Uhlu lwe-Microelectrode
3.1 Imininingwane ye-Electrode
Imingcele yeJiyomethri
Izinto zokwakha kanye nama-coatings
3.2 Izici zikagesi
Ukukhuthazwa
Ukuphepha
Ukuqapha
3.3 I-Biocompatibility
Impendulo yezicubu
I-PEDOT: Ukufakwa kwe-PSS kunciphisa ukuvuvukala kanye nezibazi ze-glial. Izifundo zibonisa i-impedance ezinzile iminyaka engaphezu kwe-2 ku-vivo.
Ukuguquguquka kwemishini
I-polyimide eguquguqukayo (i-Young's modulus ~2.5 GPa) yehlisa ingcindezi ku-cortical tissue (~1 kPa), inciphisa ukuhlukumezeka okuncane okuvela ekunyakazeni kobuchopho.
Ukuvala inzalo
I-Ethylene oxide (EtO) igcina izinto zokwakha kanye nezakhiwo zikagesi, ezigunyazwe ku-ISO 11135.
4. Ukucutshungulwa kwesignali
4.1 Ukucubungula ipayipi
Isinyathelo 1: Thwebula futhi ucubungule ngaphambili
- • Thwebula: Ozimele be-RGB 1920x1080 @ 60 FPS
- • Ukuguqulwa: I-RGB → isikali esimpunga (isisindo sokukhanya)
- • Ukulinganisa: I-adaptive histogram (CLAHE) yokuqhathanisa
- • I-Denoising: Isihlungi samazwe amabili sigcina imiphetho
- • Ukubambezeleka: <5 ms
Isinyathelo sesi-2: Ukukhishwa kwesici
- • Ukutholwa komphetho: Isihlungi se-Sobel esinezilinganiso eziningi
- • Ubuhle: Imephu yokunaka okubonwayo esuselwe kumehluko
- • Ukuhlukaniswa: Umfanekiso-ophansi onomkhawulo oguquguqukayo
- • Okubalulekile: Izinto ezihambayo zithola isisindo esiphezulu
- • Ukubambezeleka: <8ms
Isinyathelo sesi-3: Isampula ephansi ehlakaniphile
- • Ukulungiswa kwethagethi: 32x32 pixels (1024 amaphuzu)
- • Indlela: I-Adaptive pooling egcina ulwazi olubalulekile
- • Isisindo: Izifunda ezimaphakathi zithola ukulungiswa okusebenzayo
- • Ubungakanani: 8 amazinga okuqina kwephikseli ngayinye
- • Ukubambezeleka: <3ms
Isinyathelo sesi-4: Imephu ye-retinotopic
- • Guqula: I-Cartesian → izixhumanisi ze-log-polar
- • Ukukhulisa i-Cortical: Ukuminyana okuphezulu okumaphakathi (fovea)
- • Ukulinganisa: Ukushuna komsebenzisi ngamunye
- • Isinxephezelo: Ukuhlanekezela kwe-Cortical curvature
- • Ukubambezeleka: <2ms
Isinyathelo sesi-5: Umbhalo wekhodi we-stimulus
- • Ukwenza imephu: Ukuqina kwephikseli → amapharamitha we-pulse
- • Ukushintshashintsha kwezwi: I-Pulse amplitude kanye/noma imvamisa
- • Isikhathi: Ukuvumelanisa kwazo zonke iziteshi eziyi-1024
- • Ukuthuthukisa: I-algorithm yokufunda eguquguqukayo
- • Ukubambezeleka: <2ms
⚡ Ukubambezeleka kwepayipi ukusuka ekupheleni ukuya ekupheleni: <20ms (kusuka ekuthwebuleni kuya ekuvuselelweni)
4.2 Ama-algorithms wokwenza ngcono
Ukufunda okuguquguqukayo
Isistimu isebenzisa ukufunda komshini ukuze ishune ukukhuthazwa okuvela kumpendulo yomsebenzisi namamethrikhi okusebenza.
- • I-automatic per-electrode amplitude
- • Ukushuna kokuqhathanisa kombono
- • Isinxephezelo se-Impedans drift
- • Imephu ye-retinotopic eyenziwe yaba ngeyakho
Isibikezelo sokunyakaza
Ukugeleza kwe-Optical nokubikezela kwesikhashana kunqanyulwa ukunensa okubonwayo futhi kuthuthukise umbono wento ehambayo.
- • Izilinganiso zesivinini neziqondiso
- • I-extrapolation yesikhundla esizayo
- • I-Trajectory smoothing
- • Okubalulekile kwezinto ezihambayo
5. Ezokuxhumana
5.1 I-telemetry yedatha
Imininingwane ye-RF
Iphrothokholi yokuxhumana
5.2 Xhumanisa ukuphepha
Ukubethela
I-AES-128 yedatha yesikhathi sangempela. Okhiye bedivayisi ngayinye abadalwe ekumatanisweni kokuqala. Ukuzungezisa ukhiye weseshini njalo emahoreni angama-24.
Ukufakazela ubuqiniso
Inselele ehlangene–impendulo phakathi kweyunithi yangaphandle nokufakelwa, ukuvimbela ukudlala futhi nokudunwa. Isikhathi sokuvala seseshini ngemuva kwemizuzu emi-5 yokungenzi lutho.
Ukuvikelwa kokuphazanyiswa
I-FHSS kuzo zonke iziteshi ezingu-50, ukubamba ukushayisana okuzenzakalelayo, kanye nemodi yokubuyela emuva yezindawo zomsindo we-RF ephezulu.
6. Ukuphathwa kwamandla
6.1 Ukushaja okungenayo
Umgomo wokusebenza
I-resonant inductive coupling ku-13.56 MHz idlulisela amandla esikhumbeni ngaphandle kwezixhumi ezithinta i-percutaneous.
- • Dlulisa ikhoyili: 50 mm ububanzi, 10 ukuphenduka
- • Thola ikhoyili: 35 mm ububanzi, 15 ukuphenduka
- • Ukusebenza kahle: 60-70% ku-5 mm igebe
- • Amandla alethiwe: 500 mW ejwayelekile, 1 W max
- • Ukuqondanisa: ±10 mm ukubekezelelana kwezinhlangothi
Isifunda sokuphatha
I-PMIC ezinikele ibusa ukushaja kanye nomzila wamandla kuwo wonke amasistimu angaphansi okufakelwa.
- • Ukulungisa: Ibhuloho le-Schottky
- • Umthethonqubo: Ibhanti 3.6V → 1.8V/3.3V
- • Iyashaja: I-CC/CV ngokunqanyulwa okuzenzakalelayo
- • Ukuvikelwa: Overcurrent, overvoltage, izinga lokushisa
- • Ukuqapha: Ikhawunta yaseCoulomb yesimo sokukhokhisa
6.2 Ukwenza kahle kwamandla
Ukuhlukaniswa kwesabelomali samandla
(60mW)
(45mW)
(30mW)
(15mW)
Amamodi okusebenza
Ukukhuthazwa okuqhubekayo kwe-FPS engu-60, wonke amasistimu angaphansi avuliwe.
30 FPS, ukucubungula okulula, impilo ende yebhethri.
Ukuvuselela kuvaliwe; RF kanye nokuqapha kuvuliwe; ukuvuka okusheshayo.
Okuncane: iwashi nokushaja kuthola kuphela; izinyanga zokuphila.
7. Ukuphepha kanye ne-biocompatibility
7.1 Amazinga nezitifiketi
I-Biocompatibility
- ISO 10993: Ukuhlolwa kwezinto eziphilayo zemishini yezokwelapha
- USP Class VI: Ukuhlolwa kwe-Cytotoxicity
- I-ASTM F756: Izinto ezitshaliwe
Ukuphepha kukagesi
- I-IEC 60601-1: Ukuphepha kwemishini yezokwelapha
- I-IEC 60601-2-40: Ama-Neurostimulators
- IEEE C95.1: Imikhawulo yokuchayeka kwe-RF
7.2 Izindlela zokuphepha
Ukuvikelwa kwezingxenyekazi zekhompyutha
- • Umkhawulo wamanje: Okuphumayo kwenethiwekhi yokuthobelana ku-200μA
- • Ukutholwa kwesiyingi esifushane: Ukusika okuzenzakalelayo ku-<1ms
- • Izinga lokushisa: Ukuvalwa kwe-thermal ku-41°C
- • I-Watchdog: Setha kabusha ku-firmware hang
- • Isilondolozi samandla: I-Capacitor yokuvalwa okulawulwayo
Ukuvikelwa kwesoftware
- • Ubuqotho: I-CRC ku-firmware namapharamitha
- • Imikhawulo ye-stim: Ukuqinisekisa kulo lonke ushintsho
- • Ilogi yomcimbi: Iphutha kanye nomlando oyindida
- • Imodi ephephile: Okuzenzakalelayo kwe-Conservative
- • Izibuyekezo ze-OTA: Vikela ngokubuyisela emuva
Ukuqapha okuqhubekayo
- • I-Electrode Z: Isampula njalo ngo-100ms
- • I-implant temp: Izinzwa ezine ezisabalalisiwe
- • Ibhethri: Bukhoma i-SOC ne-SOH
- • Isixhumanisi se-RF: I-RSSI nezinga lephutha
- • Imali efakiwe: I-Per-electrode integrator
7.3 Ukuhlolwa kokuphepha
Katika vitro
- • I-Neural cell culture
- • I-Cytotoxicity
- • Ukugqwala
- • Ukukhathala komshini
- • Isici sikagesi
Nge-vivo
- • Amamodeli ezilwane
- • Impendulo yezicubu
- • Ukuhlolwa okusebenzayo
- • Ukulandelela isikhathi eside
- • I-Histology
Ezokwelapha
- • Ukuba nokwenzeka
- • Izilingo zokuphepha
- • Ukusebenza kahle
- • Ukulandelela isikhathi eside
- • Izehlakalo ezimbi
8. Izivumelwano zokuvuselela
8.1 Imingcele yokuvuselela
I-Waveform
I-Symmetric biphasic pulses: isigaba se-cathodic kuqala, bese kuba yi-anodic. 50 μs igebe le-inter-pulse lokukhishwa kwe-capacitive. <1% ukushaja ukungalingani ukugwema ukunqwabelana kwe-electrochemical.
Isigaba se-Cathodic (esivuselelayo).
- • I-Amplitude: 10–200 μA (i-tunable)
- • Ubude besikhathi: 100–500 μs
- • I-polarity: Ibi
- • Umumo: Unxande
Isigaba se-Anodic (sokuthola kabusha).
- • Ubukhulu: Ifanisa i-cathodic
- • Ubude besikhathi: Ihambisana ne-cathodic
- • I-polarity: Ilungile
- • Umumo: Unxande
Ukulawulwa kokuqina okubonakalayo
Amandla e-Phosphene ahlelwa ngezindlela ezintathu ezihambisanayo:
Ibanga lamanje 10–200 μA; cishe i-logarithmic enokukhanya okubonakalayo. Amazinga ayisishiyagalombili ahlukene okusebenza kahle.
Izinga lokushaya kwe-pulse 50-300 Hz; amanani aphezulu afundeka ngokugqamile, awusizo ekulawuleni okuhle ngaphandle kokubuyisela amandla amanje.
100-500 μs; ama-pulse amade ajova ukushaja okwengeziwe futhi abukeke agqamile, aboshwe ukuphepha kwe-electrochemistry.
8.2 Amasu okufaka ikhodi
Ukubhala ngekhodi kwendawo
Imephu eqondile isuka kuphikseli yesithombe ngasinye iye ku-electrode yamalungu afanayo, iqondaniswe nesakhiwo se-retinotopic cortical.
- • Isixazululo: 32x32 → 1024 ama-electrode
- • Ukukhulisa i-Cortical: Isikhungo esiminyene
- • Guqula: Imodeli ye-Log-polar fovea
- • Ukulinganisa: Ukushuna komsebenzisi ngamunye
Ukubhala ikhodi yesikhashana
Isikhathi sokuvuselela sihlanganisa okungaphezu kokuqina—ukunyakaza, ukujula, nokuqina.
- • Ukuqhuma: Izitimela zokuthutha izinto
- • Vumelanisa: Isigaba esihlobene kuwo wonke amasayithi
- • Amaphethini wesikhathi: Amakhodi wokuthungwa
- • Linganisa ukuzivumelanisa nezimo: Linganisa amathrekhi umehluko
8.3 Ukwenza ngcono nokwenza kube ngokwakho
Ukulinganisa kokuqala
Amaviki amabili kuya kwamane okusetha imingcele kanye nezindawo zokusebenza eziphephile ngesayithi ngayinye:
- Imikhawulo yokubona (10–50 μA ejwayelekile)
- Ibanga lokunethezeka (100–150 μA ejwayelekile)
- Imephu ye-retinotopic yangokwezifiso
- Ukushuna kwesizinda sesikhathi (izinga, ububanzi)
- Ukuhlolwa kwephethini elula
Ukuzijwayeza okuqhubekayo
Uhlelo lufunda ngokuhamba kwesikhathi ku:
- • Okokufaka komsebenzisi: Ukukhanya okwenziwa ngesandla/ukugqama
- • Umsebenzi uphumelele: Ukuzulazula nezikolo zokubonwa
- • Z ukukhukhuleka: Ukulungisa okuzenzakalelayo
- • Sebenzisa amaphethini: Ukushuna kwesigcawu njalo
- • Ipulasitiki ye-Neural: Ukulungiswa kabusha kwesikhathi eside
Izindlela ezikhethekile
Amaphrofayili akhelwe ngaphambilini azosetshenziswa okuvamile:
Ukungafani okuphezulu konqenqema, ukunyakaza okuphansi
Ukunyakaza, ukujula, nezithiyo
Ubuso, izinto, kanye nezimpawu zomumo
Ukuzuza nokuqhathanisa okuguquguqukayo