Isinyathelo 1:Izilungiselelo zezinsimbi
Umbala Wamanga: Imibala ekhanyayo (umbala wamanga) ingathuthukisa ukulungiswa kokugqama ngokuthuthukisa ukuhluka kwezicubu ezithambile okunzima ukukubona.Ngokwetiyori, iso lomuntu lingakwazi ukubona kuphela inani elilinganiselwe lamazinga ampunga, kodwa lingakwazi ukubona inani elikhulu lamazinga emibala ehlukene.Ngakho-ke, ukushintsha umbala kungathuthukisa ukuqashelwa kwezakhiwo zezicubu ezithambile.Umbala mbumbulu awushintshi imininingwane ye-ultrasound ebonisiwe, kodwa uthuthukisa umbono wolwazi kuphela.
Ukulungiswa kwesithombe kwe-2D
Injongo yokulungisa isithombe esinezinhlangothi ezimbili ukuhlukanisa izicubu ze-myocardial kanye nedamu legazi lenhliziyo ngezinga elikhulu kakhulu kuyilapho kugcinwa izinga eliphezulu lozimele.Ukuphakama kwezinga lozimele, kulapho isibonisi sesithombe sishelela khona kanye nolwazi olwengeziwe ongaluthola.
Amapharamitha athinta izinga lozimele
Ukujula: Izinga lozimele lesithombe esijulile.Lapho ukujula kukhulu, kuthatha isikhathi eside ukuthi isignali ibuyele ku-probe, futhi iyancipha izinga lozimele.
Ububanzi: Uma bukhulu ububanzi besithombe, buba mbalwa ukuminyana komugqa wamasampula wendawo, futhi kwehlisa izinga lozimele.Ukusondeza isithombe (zoom): Umsebenzi wokusondeza wendawo othakaselwayo ubaluleke kakhulu ekuhlolweni kwezakhiwo ezincane kakhulu nezakhiwo ezihamba ngokushesha, ezifana nokuma kwamavalvu.
Ukuminyana komugqa: Umugqa wokuskena omkhulu wohlaka ngalunye lwesithombe ukuminyana komugqa.
Indlela yokuthuthukisa isithombe esinezinhlangothi ezimbili
I-Harmonic imaging (harmonics): Ngenxa yokuphazamiseka okuqinile kwe-side-lobe yenkundla yomsindo eyisisekelo kanye nokuphazanyiswa kwelobe eseceleni okubuthakathaka okulinganiselwe kwenkambu yomsindo we-harmonic, igama lesithombe somsindo esakhiwe ngokusebenzisa ulwazi lomzimba womuntu oluthwelwe ngelesibili. i-harmonic ku-echo (i-reflection noma ukusabalalisa) Ukuze uthole isithombe se-harmonic se-ultrasound.
I-Multi-domain composite imaging (XBeam): Ukucubungula isithombe esiyinhlanganisela kusizinda semvamisa kanye nesizinda sendawo kungaqeda ngempumelelo imiphumela emibi yokuncishiswa kokulungiswa kwendawo okubangelwa ukuhlukaniswa kwesithombe nokuncishiswa kwesithombe, futhi kwenzele ukuntuleka kokuxazulula indawo yesithombe sokuqala. .Thola isithombe esicacile.
Si-tep2:Ukulungiswa kombala, amandla kanye ne-high-resolution power Doppler
Ngoba izithombe zekhwalithi ephezulu zibonisa
1. Usayizi wesithombe uphakathi
2. Isithombe sinokukhanya nomthunzi okufanele
3. Ukungafani okuhle kwesithombe nokulungiswa okuphezulu
4. Ukufana kwesithombe esihle
5. Khulisa ukuzwela kombala futhi ubonise ukugeleza kwegazi okunejubane eliphansi
6. Nciphisa i-spillover yombala futhi ususe i-aliasing
7. Khulisa izinga lozimele (thwebula izimpawu zokugeleza kwegazi ezinesivinini esikhulu)
8. Khulisa ukuzwela kwe-PW&CW
Izilungiselelo zemenyu enkulu
Ukulawula inzuzo: Uma isilungiselelo sokuzuza umbala siphansi kakhulu, kuzoba nzima ukubonisa amasignali ombala.Uma isilungiselelo siphezulu kakhulu, ukuchitheka kombala kanye ne-aliasing kuzokwenzeka.
Ukuhlunga odongeni: Kususa umsindo obangelwa imithambo yegazi noma ukunyakaza kodonga lwenhliziyo.Uma isihlungi sodonga sisethwe saphansi kakhulu, imibala izophuma igazi.Uma isilungiselelo sokuhlunga odongeni siphezulu kakhulu futhi ububanzi besivinini bulungiswa buba bukhulu kakhulu, kuzobangela ukuboniswa kombala okugeleza kwegazi okungekuhle.Ukuze ubonise ukugeleza kwegazi okunesivinini esiphansi, ibanga lesivinini kufanele lehliswe ngokufanelekile ukuze lifane nesivinini sokugeleza kwegazi esitholiwe, ukuze ukugeleza kwegazi okunombala kuboniswe kahle.
Izilungiselelo zemenyu engezansi
Imephu yombala: Imodi yokubonisa imephu yombala ngayinye engenhla inezinketho kusukela phansi ukuya phezulu, isebenzisa imibala ehlukene ukubonisa izimo zokugeleza kwegazi ezihlukene.
Imvamisa: Kunezinketho ezintathu: phezulu, okuphakathi nendawo naphansi.Kumafrikhwensi aphezulu, isivinini esingalinganiswa siphansi futhi ukujula kuncane kakhulu.Kumafrikhwensi aphansi, isivinini esingalinganiswa siphezulu futhi ukujula kujulile.Ifrikhwensi emaphakathi iphakathi nendawo.
Ukulungiswa kokugeleza kwegazi (i-flowresolution): Kunezindlela ezimbili ongakhetha kuzo: phezulu nokuphansi.Inketho ngayinye inezinketho ezimbalwa ukusuka kokuphansi kuya phezulu.Uma ukulungiswa kokugeleza kwegazi kusethelwe phansi, amaphikseli ombala azoba makhulu.Uma isethwe kokuphezulu, amaphikseli ombala aba mancane.
Isikali sesivinini (isikali): Kunezinketho ze-kHz, cm/sec, kanye ne-m/sec.Ngokuvamile khetha i-cm/sec.Ibhalansi: Lawula amasignali ombala abekwe phezulu esithombeni se-ultrasound enezinhlangothi ezimbili ukuze amasignali ombala aboniswe kuphela ngaphakathi kodonga lwemithambo yegazi ngaphandle kokuchitheka.Ububanzi obungakhethwa bungu-1~225.
Ukushelela: Kushelela imibala ukwenza isithombe sibukeke sithambile.Sebenzisa izinketho ezimbili, RISE kanye FALL, ukuze uthole ibhalansi.Inketho ngayinye inezinketho ezimbalwa ukusuka kokuphansi kuye phezulu.
Ukuminyana komugqa: Uma ukuminyana komugqa kukhuphuka, izinga lozimele liyehla, kodwa ulwazi oluqukethwe kumbala we-Doppler luyakhula, futhi imingcele phakathi kwedamu legazi lenhliziyo, udonga lwe-ventricular, kanye ne-interventricular septum iba sobala.Uma usetha, udinga ukulinganisa ubudlelwano phakathi kokuminyana komugqa kanye nemvamisa, bese uzama ukuzuza ukuminyana komugqa okuphezulu ngenani lozimele elamukelekayo.
Ukucindezelwa kwe-artifact: Ngokuvamile kukhethwa ukuthi kucishwe.
Isisekelo sombala: Hambisa umugqa onguziro wombala we-Doppler phezulu naphansi ukuze ukhiphe noma unciphise ukuhlanekezelwa kombala ukuze umbala we-Doppler ukwazi ukubonisa ngokunembile isimo sokugeleza kwegazi.
Isihlungi somugqa: Ukuze uthole ibhalansi phakathi kokulungiswa kwezinhlangothi nomsindo wesithombe, ungakhetha inani lezihlungi ezisemaceleni, ngezinketho ezihlukene ukusuka kokuphansi kuye phezulu.\
Ukulungiswa Kwe-Ultrasound Ejwayelekile---2D, CDFI, PW, njll.
1.2D Ukulungiswa
1.1 Okuqukethwe okulungiswa njalo kwe-2D
1.2
I-2D Okuqukethwe okungashintshi okungashintshi
Ukujula:
Sebenzisa ama-low-frequency probes uma izilonda ezithweni ezingaphezulu zinkulu
Umsebenzi wokukhulisa isithombe (ukufunda nokubhala ukukhulisa) ubonisa izakhiwo ezincane futhi uthuthukise ukunemba kokulinganisa
Umsebenzi wokukhulisa isithombe (ukufunda nokubhala ukukhulisa) ubonisa izakhiwo ezincane futhi uthuthukise ukunemba kokulinganisa
Ukukhanya kwesithombe nomthunzi kuzuza ngokufanele GAIN---lungisa ukuphakama kwesibonisi kwawo wonke amasiginali atholiwe, okuthinta ukukhanya kwesibonisi se-ultrasound.
Izilonda ze-hypoechoic ngokwedlulele zandisa inzuzo ephelele ukuvimbela ukuxilonga njengezilonda ze-cystic
Isinxephezelo sokuzuza ukujula I-DGC ilungisa izici zokumunca kanye nezici zokunciphisa amagagasi e-ultrasonic lapho esakazeka emzimbeni womuntu, okuzokhiqiza ama-echoes aqinile ensimini eseduze nama-echoes abuthakathaka endaweni ekude.Lungisa ngokufanelekile i-DGC ukuze ucindezele inkambu eseduze futhi unxephezele inkambu ekude, ukuze i-echo yesithombe ithambekele ku-Uniform.
Isikhathi sokuthumela: Nov-23-2023
