Idayi yokuphambana isisombululo esisetyenziselwa ukugxininisa izakhiwo ezithile xa ukhangela umfanekiso womzimba. Ama-Radiocontrast agents zizinto ezisetyenziswe kwizifundo ezifana ne-x-ray, i-fluoroscopy, kunye ne-computed tomography (CT). I-MRIs isebenzisa ezinye iirhente ezinceda ukugxininisa iimpawu eziphezulu zamalungu omzimba.
Radiographic Agents
Kwizifundo ze-x-ray kunye ne-CT, i-radiocontrast agents zizinto ezithatha i-x-ray photons kwaye azivumeli ukuba zifunyenwe yifilimu ye-x-ray okanye i-CT scanner.
Umzekelo oqhelekileyo osetyenziswayo yi-barium yezinto, ezithunyelwa kwi-sulfate ye-barium sulfate. Idayi eyahlukileyo ingafakwa kwiimitha zakho zegazi (ukubonisa iinqanawa), inokuthi ifakwe emlonyeni (ukubonisa umthamo ophezulu), okanye ufakwe kwi-rectum (ukubonisa umthamo ophantsi). Kwezinye ii-CT, zonke iintlobo ezintathu zokuchasana (okuthiwa "ukuhluke kathathu") zisetyenzisiweyo.
Kwiimathambo, ukusetyenziswa ngokuqhelekileyo kwee-ojenti ze-radiographic kukufaka injini kwi-arhente kwi-joint, okanye isikhala ngaphakathi komzimba. Ngokuqhelekileyo isikhala sichazwa nge-ejensi ye-radiographic ukuqinisekisa ukuba inaliti isesikweni esifanelekileyo phambi kokuba ijojoza ijojowe.
Ama-MRI Contrast Agents
Uhlu lwe-MRI lusebenza ngokungafaniyo kodwa luphinde lugxininise ukungafani phakathi kwezicubu. Uhlobo lweMRI luguqula iimpawu eziphezulu zamathambo. Iipropati ezichitshiweyo ziya kwahlula iintlobo zeethambo kwiimifanekiso ze-MRI.
I-ejenti ye-MRI esetyenziswa ngokuqhelekileyo yinto yegadolinium.
Njengoko i-agent ye-radiographic, i-gadolinium inokufakwa kwiimithwalo zegazi okanye injected into ehlangeneyo. Iimpawu ze-MRI ezinokuphucula i-Gadolinium zinokukunceda kakhulu ekuboniseni iziphumo ezintle ezifana neendwangu ze-labral kwi-shoulder and hip cartilage . Ngaphandle kokuba i-ejenti eyahlukileyo idibeneyo, ezi ziphumo ezingabonakaliyo zingabonakali.