Siemens X300 EV9-4 Echo Ultrasound Scanner Probe Endocavity Transducer

Ubume be-transducer

Iiparameters zentsebenzo ye-transducer, echaphazela umgangatho wemifanekiso ye-ultrasound, i-axial kunye ne-lateral resolution kunye novakalelo. Isisombululo se-axial sinqunywe kakhulu ngokuphindaphindiweyo kwe-ultrasound wave. Njengoko i-frequency inyuka, ubude be-waveleng buyancipha, nto leyo iluncedo kuba inika umahluko ongcono phakathi kwethagethi kunye nezinye izinto. Isisombululo secala ecaleni kwendlela ye-orthogonal ukuya kwi-axial direction inqunywe yiprofayili ye-beam ye-transducer. Umqadi omxinwa ukhokelela kwisisombululo esingcono kwicala elisecaleni. Uvakalelo lwe-transducer lumisela umlinganiselo wokuchasana wemifanekiso ye-ultrasonic. I-transducer enovakalelo oluphezulu inokuvelisa umfanekiso oqaqambileyo wethagethi. I-transducer yenzelwe ukufumana imifanekiso ekumgangatho ophezulu ngokuphucula ezi parameters zokusebenza.

I-transducer ye-array ye-1D eqhelekileyo iqulunqwe ngumaleko osebenzayo, i-acoustic ehambelanayo, i-backing block, i-lens acoustic, i-kerfs, i-ground sheet (GRS), kunye nebhodi yesekethe eprintiweyo (FPCB). Uluhlu olusebenzayo ngokuqhelekileyo lwenziwe nge-piezoelectric material-ikakhulukazi i-piezoceramic. Umaleko osebenzayo uvelisa i-wave ye-ultrasound ekuphenduleni umqondiso wokuqhuba umbane, ufumana i-wave ebonakaliswe kumda we-organ, kwaye uguqule i-wave ye-ultrasound efunyenweyo kwi-signal yombane ngokusebenzisa i-piezoelectric effect. Nangona kunjalo, umahluko omkhulu kwi-acoustic impedance phakathi kwezinto ze-piezoceramic kunye nomzimba womntu uthintela ukuhanjiswa okusebenzayo kwamandla e-ultrasonic phakathi kweendaba ezimbini. Iingqimba ezihambelana ne-acoustic zisetyenziselwa ukuququzelela ukuhanjiswa kwamandla e-ultrasound. Umaleko ngamnye ohambelanayo unobunzima bekota enye yobude bobude kumbindi wokuphindaphindeka kwe-transducer. Ibhloko yokuxhasa isetyenziselwa ukufunxa amaza e-ultrasound asasazeka ngasemva ukusuka kwinto yepiezoelectric. Ukuba i-wave backward iboniswa ezantsi kwebhloko exhasayo kwaye ibuyele kwi-piezoelectric element, inokubangela ingxolo kumfanekiso we-ultrasound. Ngaloo ndlela, i-backback block kufuneka ibe ne-attenuation ephezulu. Ukongeza kule nto yokudambisa izinto, iinguqu ezininzi zesakhiwo ziye zaphunyezwa ukunyusa imiphumo yokusabalalisa ngaphakathi kwebhloko yokuxhasa, umzekelo, ukufaka iigrooves okanye iintonga kwibhloko. Ibhloko exhasayo ngokuqhelekileyo ine-acoustic impedance phakathi kwe-3 kunye ne-5 Mrayl. Ukuba ibhloko exhasayo ine-acoustic impedance ephezulu kakhulu, amandla e-acoustic aveliswa yinto ye-piezoelectric iya kuchithwa yibhloko yokuxhasa kwaye amaza ambalwa e-ultrasound aya kudluliselwa emzimbeni womntu. I-acoustic lens ikhusela i-ultrasonic transducer kumonakalo wangaphandle, kwaye igxininise umqadi we-ultrasound kwindawo echaziweyo ngokusekelwe kumthetho we-Snell. Izinto eziphathekayo ezine-contants attenuation constants zikhethwa ukunciphisa ukulahlekelwa kwamandla e-ultrasound ngaphakathi kwi-lens. Iilensi zeacoustic eziqhelekileyo zenziwe ngezinto zerabha zokunxibelelana ngokukhululekileyo phakathi kwe-transducer kunye nezigulana. I-kerf ngumsantsa phakathi kwezinto ezenziwe nge-piezoelectric ezahlula into nganye kwizinto ezimelene nayo ukunciphisa i-crosstalk phakathi kwazo. I-crosstalk ithoba kakhulu ukusebenza kwe-transducer. Ke ngoko, iimilo ezahlukeneyo kunye nemathiriyeli yekerf ziye zaphuhliswa ukunciphisa i-crosstalk.