Lapho kuhlolwa i-ultrasoundisisunomaizinsookukhulunywa ngakho, ukubala noma amatshe (njengamatshe ezinso kanye ne-gallstones esithombeni esingenhla) kuvame ukuhlotshaniswa kuqala, kodwa amatshe anobukhulu obulinganayo angase abe namazinga ahlukene omsindo nesithunzi.Isibonelo, ukwakheka okuhlukile kwetshe, noma ithonya lokubushelelezi kobuso betshe.Ukuthi ngabe lezi zakhiwo ezingokomzimba zinquma ngokuyisisekelo ubukhulu bomsindo nesithunzi, okwamanje, sizohlaziya ukusebenza komsindo nesithunzi ngokuma kwegongolo ye-ultrasonic ngokwayo.
Okokuqala, umsindo nesithunzi sikhuluma ngokudumile, i-ultrasonic beam ekhishwe ivinjiwe endaweni yetshe, okuholela ekukhanyeni kwe-ultrasonic ngemuva kwetshe, futhi ngokwemvelo izicubu kulezi zikhundla azikwazi ukukhiqiza ama-echoes, ngaleyo ndlela zikhiqize umsindo nesithunzi. .Siyazi ukuthi umsebe we-ultrasonic emission iyona mncane kakhulu endaweni okugxilwe kuyo umsi, futhi i-beam endaweni engaphandle kokugxilile iyakhula kancane kancane futhi ibonakala imise okwesihlalo.Njengenjwayelo, sisasebenzisa isifaniso se-ultrasound imaging namakhamera.Njengoba nje inani lokuvula ilensi lekhamera ye-SLR lilincane (imbobo yangempela inkulu), iba ngcono ukucaca kwendawo okugxilwe kuyo, futhi kugqame kakhudlwana i-bokeh engaphambili nengemuva.Lapho uthwebula izilwane ezisekhejini lensimbi ngekhamera, ingabe uqaphele ukuthi ikheji lensimbi laba yinetha elikhanyayo esithombeni?Isithombe esingezansi yipheya lezinkawu nomama abathwetshulwe umlobi ekhejini e-Bangkok Wildlife Park, futhi uma ungabhekisisi, ungase ungawaboni amagridi afiphele.Kodwa lapho sigxila ekhejini lensimbi, ikheji lensimbi elimnyama livimba ngempela ingemuva.Labo abanentshisekelo bangaya ekhaya futhi bazame ukuzwa lokhu kuhlolwa ezindaweni ezihlukene zokugxila, njengombhali osesithombeni esingezansi edubula unodoli oyisinxibi wentombazane ewela imfoloko.
Ake sibuyele emuva ekucabangeni kwe-ultrasound, ukuze sifunde ngobuningi le nkinga, sisebenzisa isikhunta somzimba we-ultrasonic (KS107BG) esikala ukungena nokuxazulula ukukhombisa ukwenzeka komsindo nesithunzi, okuhlosiwe kwalo modeli womzimba umugqa omncane ongewona. obala, okungalingisa kahle umphumela wethunzi lomsindo.Ukuze sibonise kangcono umthelela wokuvala, sisebenzisa i-high-frequency probe enemvamisa emaphakathi ye8.5MHz, ngoba i-high-frequency probe ingathola i-fineer ultrasonic beam (ngakho-ke kulula futhi ukuthola ukulungiswa okuphezulu kwe-lateral).
Okokuqala, silungisa ukugxila kokukhiphayo kube ukujula kuka-1cm, singabona okuhlosiwe endaweni engu-1cm iyona ecace kakhulu, futhi indawo emnyama kancane ingabonakala kancane ngemuva kwethagethi engaba ngu-5mm, kodwa okuhlosiwe okungaphansi kuka-1cm ehudulwa wumzila omude omnyama, okuyiwo okuthiwa wumsindo nesithunzi.Indawo engaphakathi kuka-1cm ifana nengaphambili ekuthwebuleni, ngokugxila ku-1cm kanye nendawo engemuva ngemuva kuka-1cm.Ngokusobala, okuqondiwe okungaphambili phakathi kuka-1cm kufana nekheji esithombeni senkawu njengamanje, futhi uma sigxila ekujuleni okungu-1cm, i-ultrasound ibonakala ikwazi ukukudlula futhi iqhubeke nokudlulisa amandla phambili cishe ingathinteki.Kodwa-ke, indawo engezansi kokugxilwe kuyo ayikwazi ukuvinjwa eduze kwethagethi, okuholela ekutheni kungabi bikho ukusekelwa kwamandla e-ultrasonic ngemuva kwethagethi, ngakho-ke akukho-echo.Ukuze siqinisekise kangcono i-hypothesis yethu, silingise imishayo ye-ultrasonic egxile kulesi sikhathi, futhi amaza angaphambili amagagasi e-ultrasonic pulse ngezikhathi ezahlukene aboniswa esithombeni esilandelayo.
Ngokusobala, ekujuleni kuka-1 cm, amandla ephoyinti eligxilile lokuphuma agxiliwe, okuholela ensikeni encane, futhi ububanzi be-beam bunwebeka kancane kancane njengoba busuka ekujuleni kokugxila.Uma ukujula kwethagethi kungaphansi kuka-1cm, okuqondiwe kusitha ingxenye yamandla, kodwa usayizi wethagethi mancane kakhulu, futhi amandla angavimbekile ohlangothini azoqhubeka nokukhuphuka abheke endaweni okugxilwe kuyo, ngakho-ke umsindo nesithunzi salezi zinhloso kuzoba buthakathaka kakhulu, futhi uma usondela ebusweni be-probe, umsindo nesithunzi sizoba sobala kancane.Lapho indawo okuqondiwe kuyo isisekujuleni kokugxila, ugongolo lwe-ultrasonic ngokwalo luncane kakhulu, ngakho-ke amandla okuhlosiwe angakwazi ukuwavimba maningi, okuholela ekutheni amandla amancane akwazi ukuqhubeka ezungeza okuhlosiwe, okwenza futhi indawo. ngemuva kwalokhu kujula kukhiqiza indawo emnyama yangempela.Kufana nokuthi ugxile ekhejini, futhi indawo engemuva kwegridi yekheji ivinjwe ngokuphelele.
Kwenzekani uma ithagethi ingemuva kwendawo okugxilwe kuyo (indawo engemuva)?Abanye abantu bazothi insimbi yomsindo nayo ibanzi kakhulu, futhi okuqondiwe kungavala ingxenye yayo kuphela, ingabe izofana nendawo engaphambili, ingabe amandla angakwazi ukudlula okuhlosiwe ukuze anciphise umsindo nesithunzi?Impendulo ngokusobala ithi cha, njengoba nje okuhlosiwe kumugqa wesokunxele otshekile esithombeni esingenhla konke kungemuva kokushona kuka-1cm, futhi umsindo nesithunzi okukhiqizwayo akukhona ngaphansi kokuhlosiwe endaweni engu-1cm.Ngalesi sikhathi, sibheka ngokucophelela ukuma kwe-ultrasonic beam, futhi i-wavefront ye-beam ngaphambi nangemva kokugxila akusicaba, kodwa kufana nesimo se-arc esigxile ekugxilweni.I-beam eseduze nobuso be-probe ihlanganiswa ibheke endaweni okugxilwe kuyo, kuyilapho amagagasi afanayo ajula kunephoyinti eligxilile asakazwa ngaphandle ngephoyinti eligxilile.Okusho ukuthi, lapho ithagethi isendaweni engaphambili lapho igagasi lomsindo elingasithelwe ithagethi lizoqhubeka nokusabalala ngendlela okugxilwe kuyo, kanye negagasi lomsindo elingafihliwe okuqondiwe endaweni engemuva. sizoqhubeka nokusabalala ngendlela yokuchezuka emugqeni wokuskena, sithola kuphela isignali ye-echo emugqeni wokuskena, ukuze amandla achezuka emugqeni wokuskena awakwazi ukutholwa, ngakho-ke kwakhiwa umsindo nesithunzi.
Lapho silungisa ukugxila kwethulwa ekujuleni okungu-1.5cm, umsindo nesithunzi esingemuva kwethagethi ekujuleni okungu-1cm nakho kwehliswe kakhulu, kodwa okuhlosiwe ngemva kuka-1.5cm kwakusadonsa umsila omude omnyama.Ngezansi kunesakhiwo se-beam sokukhishwa kwe-ultrasonic, Masizame ukuhlaziya isenzakalo somsindo nesithunzi sihlanganiswe ne-morphology ye-beam.
Uma ukujula kokugxila kuthuthukiswa ngokuqhubekayo kube ngu-2cm, umsindo nesithunzi ngemuva kwethagethi phakathi kuka-2cm kuba buthaka kakhulu.Isibalo esingezansi yisakhiwo esihambisanayo se-ultrasonic emission beam.
Isithombe sesibonelo sangaphambilini siwukujula kokugxilisa kuphela okulungisiwe, futhi izimo kwezinye izixhumi ezibonakalayo zihlala zingashintshiwe, kodwa lapho kulungiswa ukujula kokugxila, ingemuva liphinde lisikisele isimo, okungukuthi, njengoba ukujula kokugxila kokukhiphayo kuya kujula, indawo ekhipha umbhobho nayo izokhuphuka (inombolo engaphambili esihlokweni somdwebo we-beam iwukujula okugxilwe kuyo, futhi inombolo engemuva yinombolo yezakhi zohlelo oluhambisana nembobo ephumayo), nangokubheka ububanzi be-beam bophenyo. ngaphezulu, singathola futhi ushintsho lwangempela lwembobo yokukhipha umoya.Ngokuvamile, indawo yokubeka yokugxilwa kokukhiphayo ilingana nokujula kokugxilile, njengelensi yokusondeza enembobo engaguquki.
Ngakho-ke uyini umphumela emsindweni nasethunzini lapho ukujula okufanayo kokugxila kanye nosayizi wokuvula kuhlukile?Ukuthatha ukugxila okufanayo kokujula okungu-1.5cm njengesibonelo, ngokulungisa amapharamitha angaphakathi omshini, usayizi wembobo ephumayo uphindwe kabili.
Bekufanele sifunde ukuhlaziya isenzeko somsindo oqondiwe nesithunzi ngokusebenzisa imephu ye-beam ngokusebenzisa isibonelo esingenhla, ukuze sikwazi ukubheka ngokuqondile i-beamogram yalesi sibonelo.Njengoba indawo yokungena iba mncane, umsebe wokugxila uyanwetshwa, kodwa ukugoba kwesihlalo kuba kuncane.Ukungqubuzana kwemishayo efanayo engaphambili nengemuva kuba yinto engabonakali, futhi uma ubheka ukuthi amajika angaphambili e-wave abheke kangakanani, kuyabonakala ukuthi amandla e-ultrasonic afane nendiza ehambisana nobuso be-probe ebhebhetheka phambili.Ngakho-ke, umphumela omubi uwukuthi nakuba amandla e-ultrasonic endaweni yangaphambili engaphambili evinjwe kancane into eqondiwe, asengaqhubeka nokusabalala endaweni eqondiwe ebheke endaweni okugxilwe kuyo, kodwa lapho imbobo encane incane, ububanzi bangaphambili. ugongolo luyancishiswa kuqala, inani lamandla avinjiwe liyakhula, futhi amaza omsindo ohlangothini awahlangani abheke endaweni yokugxila yokwethulwa, ngakho-ke nakuba amandla e-ultrasonic angafihliwe eqhubeka nokusabalala phambili, cishe awunawo umnikelo. ku-echo yokuma komugqa wokuskena, okubuye kuholele ekuncishisweni kwembobo.Ngisho nomsindo nesithunzi sethagethi endaweni engaphambili kuzocaca nakakhulu.Njengalapho sithatha isithombe senyoni evalelwe ngefoni ephathekayo ngaphesheya kwekheji, kungakhathaliseki ukuthi imbobo yefoni ephathekayo ingakanani, izoshiya igridi emnyama ebonakalayo yekheji esithombeni, ngenxa yokuthi imbobo yangempela ikhamera yeselula incane kakhulu.
Ngaphambilini, senze ukuhlaziya kokuhlola endaweni yokugxila kokukhipha kanye nosayizi wembobo ekhipha umoya enomsindo nasethunzini, kuhlanganiswe nokuskena kwangempela kwe-ultrasonic, ukuze kuthwetshulwe amatshe amancane, ukuze kutholwe umsindo nethunzi elingcono. imiphumela, ngokuvamile akunakwenzeka ukushintsha usayizi wembobo, kodwa kungase kwenzeke ukucabangela indawo yokugxila eduze ngangokunokwenzeka ngaphambili kwetshe.Noma lapho umsindo nesithunzi kungabonakali, akusho ukuthi amatshe mancane kakhulu, noma kungenzeka ngenxa yokuthi akugxilile endaweni efanele.Ngaphezu kwalokho, njengoba kushiwo ekuqaleni, kungase kube nezici eziningi ezithonya amandla omsindo nesithunzi, njengemvelo eqondile kakhulu ubukhulu betshe, ngaphezu kwalokho, umsindo oyisisekelo nesithunzi ngokuvamile sibuthakathaka kakhulu kunei-harmonicumsindo nesithunzi, nokunye, ngakho-ke ayikwazi ukwenziwa jikelele.
Ngakho khetha imikhiqizo ye-ultrasound, ikhwalithi yayo ye-imaging ibaluleke kakhulu, i-harmonic imaging enhle izokwenza umsebenzi wakho wezokwelapha ube sezingeni eliphezulu, wamukelekile ukubonisana nawe mayelana nemikhiqizo ye-ultrasound oyithandayo kanye neminye imishini yezokwelapha.
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Isikhathi sokuthumela: Sep-08-2022
