Ukusetshenziswa kwe-Fiber Bragg Grating Sensor Temperature Monitoring System ku-Medical Nuclear Magnetic Resonance

Inzwa ye-fiber optic lokushisa, Uhlelo lokuqapha oluhlakaniphile, Umkhiqizi we-fiber optic osabalalisiwe e-China

Izinzwa zezokwelapha izinzwa ezisetshenziswa emkhakheni we-biomedical, engaguqula amasignali okuphila komzimba womuntu abe ulwazi lwesithombe esifundeka kalula. Zingamathuluzi abalulekile asetshenziswa odokotela ekuxilongeni nasekwelapheni. Ngenxa yokusetshenziswa kwezinzwa zezokwelapha emzimbeni womuntu, ukuklanywa nokusetshenziswa kwezinzwa zezokwelapha kufanele kucabangele ukucaciswa nokuba yinkimbinkimbi kwezimpawu zebhayoloji, ngenkathi futhi kucutshungulwa i-biocompatibility, ukwethembeka, nokuphepha. Eminyakeni yakamuva, abacwaningi bathole ukuthi izici ze-fiber optic gratings zingahlangabezana nezidingo ezikhethekile zezinzwa zezokwelapha, ngakho inani elikhulu lezinzwa zezokwelapha ezisekelwe ku-fiber optic gratings ziye zahlongozwa abacwaningi. Ngakho-ke, kuyadingeka ukwethula izimiso zokuzwa eziyisisekelo ze-fiber optic gratings, hlaziya izici zokusetshenziswa kwezinzwa ze-fiber optic grating, futhi ifingqa inqubekelaphambili yesicelo sabo emikhakheni yemishini yezokwelapha efana nokuqapha inhliziyo, ukuqapha ukuphefumula, ukuqapha izinga lokushisa, i-ultrasound, kanye nemithi yokuhlinza.

Ngenxa yokusetshenziswa kwemishini yezokwelapha emzimbeni womuntu, idinga ukuhambisana nezici ezihlukahlukene eziyinkimbinkimbi zesakhiwo somzimba womuntu, kanye nezici ze izinzwa ze-fiber optic grating ingahlangabezana nezidingo ezikhethekile zezinzwa emkhakheni wemishini yezokwelapha. Izici ze-fiber Bragg gratings ziqinisekisa ukuphepha kokusetshenziswa kwazo kwangempela futhi zifaneleka kakhulu emkhakheni wokuzwa wemishini yezokwelapha..

Ukuhlaziywa Kohlelo Lwe-Fiber Bragg Grating Ensimini Yezisetshenziswa Zezokwelapha

Isicelo emkhakheni wokuqapha inhliziyo

Ukusebenza kahle kwenhliziyo kungenye yemingcele ebalulekile yokuqapha inhliziyo, kanye nenzwa ye-fiber optic grating yokulinganisa ukusebenza kahle kwenhliziyo kwahlongozwa 1997. Kule ndlela yokulinganisa, umsebenzisi ufaka i-catheter ye-dilution eshisayo eqondisayo ku-atrium engakwesokudla yesihloko bese ejova uketshezi oluqandisiwe. Ngokulinganisa izinga lokushisa kanye nezinga lokushaya kwenhliziyo komthambo wegazi we-pulmonary, ukukalwa kwevolumu yokumpompa inhliziyo ekugcineni kufinyelelwa.
Inzwa ye-fiber optic grating isetshenziselwa ukukala umsindo wenhliziyo yomuntu kanye nemvamisa yokushaya kwenhliziyo. I-fiber optic grating ipakishwa ku-textile njengekhanda elizwayo. Lapho indwangu inamathele ngokuqinile emzimbeni womuntu, umsindo wenhliziyo nokushaya kwenhliziyo kusebenza ekhanda elizwayo le-fiber optic grating, ukuqaphela inqubo yokuguquguquka kwezimpawu zokukhanya zomsindo. Ekugcineni, ngokuqapha izinguquko phakathi nendawo, ukuzwa komsindo wenhliziyo yomuntu kanye nemvamisa yokushaya kwenhliziyo kufinyelelwa.

Isicelo emkhakheni wokuqapha wokuphefumula

Isistimu yokuqapha yokuphefumula esekelwe ku-fiber optic grating, elungisa inzwa ye-fiber optic grating strain esifubeni sesihloko nge-elastic tape. Inzwa ikala i-spectrum yenqubo yokuphefumula ngokuqapha izinguquko endaweni yesifuba. Enqubweni yokusebenzisa ama-electrode aphezulu-voltage ukusiza iziguli ekuphefumuleni okwenziwa, ukukhishwa kwe-high-voltage ngokuvamile kusetshenziselwa ukuvuselela i-diaphragm nerve ukusiza iziguli ukuphefumula.. Ngakho-ke, isifuba sesiguli sidinga ukuhlonyiswa ngama-electrode aphezulu. Izinzwa zikagesi ezijwayelekile aziyilungele le ndawo ene-voltage ephezulu, kanye ne-fiber Bragg grating inezici zokunqanda ukuphazanyiswa kwe-voltage ephezulu. Ngakho-ke, ngokusekelwe kuzinzwa ze-fiber Bragg grating, ingasetshenziswa kule ndawo ene-voltage ephezulu. Kulolu hlobo lwenqubo yokusebenzisa ama-electrodes aphezulu ukusiza iziguli ekuphefumuleni okwenziwe, isetshenziselwa ukulawula ukucushwa kokukhishwa kwe-voltage ephezulu kanye nokufeza ukuqapha kwesikhathi sangempela kwesimo sokuphefumula kwesiguli..
Dala isistimu yezinzwa egqokekayo yokuqapha ngesikhathi sangempela izimo zokuphefumula zomsebenzisi. Le nzwa isebenzisa i-fiber optic gratings ukuthungela izindwangu, ezigqokwa esifubeni nasesiswini somsebenzisi. Ngokuqapha izinguquko esifubeni nokucindezela kwesisu, ukuqapha ukunyakaza kokuphefumula ngesikhathi sangempela kufinyelelwa. Le nzwa egqokekayo isiza ukuqapha ngesikhathi sangempela ukuphefumula komsebenzisi ngabasebenzi besikhungo sezokwelapha.

Isicelo emkhakheni ultrasound

Iyunithi ethile yocwaningo ithola izinkambu ze-ultrasonic ezisuselwe kuzinzwa ze-fiber optic grating. Phakamisa i-fiber optic grating ende engu-1mm njengenhloko ezwayo ukuze ulinganise a 2 Inkambu ye-ultrasonic ye-high-frequency MHz, ngokulungiswa kwengcindezi ye-10-3Hz.

Kunamadivaysi amaningi okuxilonga ama-ultrasound emishinini yezokwelapha, njenge-ultrasound lithotripsy, i-ultrasound hyperthermia, kanye nokuhlinzwa kwe-ultrasound. Lapho kusetshenziswa imishini ye-ultrasonic, amandla ayo okukhipha ngokuvamile adinga ukugadwa ngesikhathi sangempela yizinzwa, kuyilapho amadivaysi avamile e-piezoelectric ezwela amasimu kagesi, kodwa usayizi we-probe awufani nawo, okwenza kube nzima ukukala ngokunembile insimu ye-ultrasonic ngaphakathi komzimba. Izinzwa ze-fiber optic grating zinezici zosayizi omncane kanye nokumelana nokuphazanyiswa yi-electromagnetic, ezilungele ukuzwa imishini yokuxilonga ye-ultrasound yezokwelapha futhi ezingafinyelela ukukalwa kwamaphuzu amaningi ezinkambu ze-ultrasound.

Isicelo emkhakheni wokuqapha izinga lokushisa

A isistimu yokuzwa izinga lokushisa kwe-fiber optic grating isetshenziswe ukuqapha izinga lokushisa langempela lomshini we-nuclear magnetic resonance. Inhloko yezinzwa yesistimu yakhiwe ama-grating e-fiber optic amane axhunywe ochungechungeni. Ngesikhathi sokusebenzisa, ikhanda elizwayo lifakwa esitsheni somshini we-nuclear magnetic resonance, enenani lensimu kazibuthe ye 4.7 T. A 25 Intambo ye-fiber optic eyimitha ende isetshenziswa ukuxhuma i-probe kanye ne-demodulator. Ukulungiswa kwezinga lokushisa kwesistimu yezinzwa kuyinto 0.1 ℃, ukunemba ngu-± 0.5 ℃, futhi ububanzi bokulinganisa bu 25-60 ℃. Lolu hlelo lwezinzwa luhlanganisa ngokugcwele izinzuzo zezinzwa ze-fiber optic grating ekumelaneni nokuphazanyiswa yi-electromagnetic., ukufeza ukuqapha izinga lokushisa ukuthi izinzwa ze-thermocouple zendabuko azikwazi ukusetshenziswa ezindaweni ezinamandla kazibuthe.
Uhlobo olusha lwe-fiber ezwa izinga lokushisa kwezokwelapha i-Bragg grating sensing system esetshenziswa ekuqapheni izinga lokushisa ngesikhathi se-hyperthermia yezokwelapha..

Imiphumela yokulinganisa izinga lokushisa yale sistimu yezinzwa ihambisana naleyo yezinzwa zendabuko ze-thermocouple, ngesinqumo se 0.1 ℃, ukunemba kwe-± 0.2 ℃, kanye nobubanzi bokulinganisa be 30-60 ℃. Izici ezibonakalayo ezizinzile zezinzwa ze-fiber optic grating zifaneleka kakhulu ekusebenzeni kwazo kweminye imikhakha yezokwelapha enezindawo zokutholwa eziyinkimbinkimbi..

Ngokusekelwe kumgomo oyisisekelo wokuzwa we-fiber Bragg grating, izici zohlelo lokusebenza zezinzwa ze-fiber Bragg grating ziyivolumu encane, isisindo esilula, ukumelana nokugqwala, izinga lokushisa eliphezulu nokumelana nokucindezela okukhulu, Ukumelana nokuphazamiseka kwe-magnetic field, ukuzwela okuphezulu nokunemba. Ukusetshenziswa kwezinzwa ze-fiber Bragg grating emikhakheni yemishini yezokwelapha efana nokuqapha inhliziyo, ukuqapha ukuphefumula, ukuqapha izinga lokushisa, i-ultrasound, futhi ukuhlinzwa kufinyezwa. Nokho, ukusetshenziswa kwezinzwa ze-fiber optic grating emkhakheni wemishini yezokwelapha yangempela kusadinga ukucabangela ubunkimbinkimbi kanye nokucaciswa kwezicelo zezokwelapha.. Okwamanje, ucwaningo oluningi lusesigabeni socwaningo lwaselabhorethri kuphela. Kukholakala ukuthi ngocwaningo olwengeziwe nokuhlolwa ngabacwaningi, kuzothuthukiswa izinzwa zezokwelapha ze-fiber optic grating ezingasetshenziswa ngempela emkhakheni wemishini yezokwelapha.