I-Optical coherence tomography (OCT) iteknoloji yokucingela engabonakaliyo esetyenziselwa ukufumana imifanekiso ephezulu yesisombululo se- retina . I-OCT ifana nokuhlolwa kwe-ultrasound, ngaphandle kokuba ukucatshulwa kwenzelwa ukulinganisa ukukhanya kunezandi. I-OCT inomlinganiselo wokulinda kwe-fibre nerve fibre kwi glaucoma kunye nezinye izifo zentsimbi ye-optic.
I-OCT ngexesha lovavanyo lweehlo
I-Optical Coherence Tomography ikwabizwa ngokuba yi-OCT, yindlela yokwenza i-optometrists kunye ne-ophthalmologists ukufanekisa umva kweso iso kuquka i-macula, i-nertic optic, i-retina kunye ne-choroid. Ngexesha lokuhlolwa kwemehlo, i-optometrists kunye ne-ophthalmologist banokubukela emva kweso kunye ne-anatomy yayo. Nangona kunjalo, ngamanye amaxesha oogqirha badinga iinkcukacha ezingaphezulu okanye kufuneka bahlole iinkcukacha ngaphantsi komgangatho onzima ukuwujonga ngeendlela eziqhelekileyo. Ngandlela-thile, kunokuthelekiswa nokwenza i- "MRI ye-retina." Abanye balichaza njengendlela ye-ultrasound ye-optical kuba imifanekiso ibonakalisa phakathi kwezicubu ukubonelela oogqirha ngemifanekiso eqingqiweyo.
Iinkcukacha ezingabonakaliswa ne-OCT kwisisombululo esiphezulu sokuba oogqirha babona izinto azizange zibonwe ngaphambili kwiliso lomntu ophilayo. Ngokwenene imifanekiso yenkcazo ilungileyo kuneemitha ezili-10, ezingcono kuneMRI okanye i-ultrasound.
Ngenxa yoko, kunokuba bajonge amehlo kwaye baqikelele ukuba amandla abo angaba nokuvuvukala kwindlela ekhangeleka ngayo, i-OCT iza kusinika ulwazi olunzulu kwaye luyabonisa ngokucacileyo ukuba isalathisi ye-retina iqokelela njani i-edema okanye ukuvuvukala kwamanzi. Ingasetyenziselwa ukulandelela ukuphilisa okanye isisombululo sokukhupha.
Ukubambisana kwee-tomography kusebenza ngokusebenzisa i-interferometry. I-Interferometry yenza ukuba abaqeqeshi beziliso zamehlo bafanise umfanekiso weethambo ngokukhanya ngaphandle kwe-X ray, isandi okanye i-frequency frequency. Isebenza ngokukhanyisa i-light of light in the eye. Icandelo lolu khanyiso luboniswa ngamancuba ahlukeneyo. Iimifanekiso zakhiwe ngokusekelwe kuloluhlu lwangaphakathi lwengqondo. Imifanekiso ye-OCT ukuya malunga ne-2-3 mm ngaphantsi komphezulu weethambo. Imifanekiso ifumaneka ngokucacileyo ngefestile ebonakalayo, njenge-cornea. Ukukhanya okuphuma kwijiso kukhuselekile. Isiphumo sisondele ekukhanyeni kwe-infrared ukuze kungabikho umonakalo kwiso.
Yintoni eyenzekayo ngexesha le-OCT?
I-OCT inokuba yinto elula kakhulu yokwenza uvavanyo lwezonyango oza kulufumana. Uvavanyo luthatha kuphela imizuzu engama-5 ukwenza. Ngomatshini amaninzi we-OCT, ubeka nje intloko yakho kwisikhanda. I-technician iyakulinganisa isixhobo. Uya kufundiswa ukuba ukhangela ukujoliswa kokukhanya ngaphakathi komatshini. I-technician izakufumana umfanekiso. Ukuba ngaba abafundi bakho bancinci okanye ukuba ugqirha ufuna umfanekiso wendawo ekhethekileyo, abafundi bakho baya kuhlanjululwa ngamaconsi anamehlo. Uninzi lwabantu aludingi ukuhlengahlengiswa.
I-OCT isetyenziswe ikakhulu ekuhloliseni iimeko ezininzi zamehlo, kubandakanywa:
- Central retousopathy
- I-retinopathy yesifo seesifo
- Glaucoma
- Ukuhlaselwa kwamanzi
- Imingxuma yamanzi
- I-pre-retinal macular fibrosis (i-cellophane maculopathy)
I-OCT ibonisa ezinye zezinto zobuchwephesha zakutshanje ekunyamekelweni kwamehlo ezingeniswe kwixabiso eliphantsi kakhulu kwisigulane.