I-Bone densitometer sisixhobo sovavanyo lwezonyango esilinganisa amathambo amathambo omntu kwaye sifumane idatha ehambelanayo.I-densitometers yamathambo aqhelekileyo kwimarike ekuqaleni kwenkulungwane ye-21 yahlulwe yangamacandelo amabini: i-double-energy X-ray absorptiometry kunye ne-ultrasonic absorptiometry.I-X-reyi ye-absorptiometry yamandla amabini I-X-reyi absorptiometry ifumana iindidi ezimbini zamandla, ezizezi, amandla aphantsi kunye nencopho yefoton enamandla kakhulu, ngesixhobo esithile ngetyhubhu ye-X-reyi.Emva kokuba i-photon incopho ingene emzimbeni, inkqubo yokuskena ithumela isignali efunyenweyo kwikhompyutheni yokucubungula idatha ukuze ifumane umxholo wamaminerali wethambo.Isixhobo sinokulinganisa ubunzima bamathambo kuyo nayiphi na inxalenye yomzimba ngokuchaneka okuphezulu kunye nomonakalo omncinci kumzimba womntu.Ithamo lemitha yokubona indawo lilingana ne-1/30 yeX-reyi yesifuba kunye ne-1% ye-CT.Akukho ngxaki yokubola komthombo weradioactive, yaye iye yaphuhliswa ngokuthe ngcembe kwizixeko ezikhulu zaseTshayina, yaye ithemba liyathembisa.
I-double-energy X-ray absorptiometry system iqukethe ityhubhu ye-X-ray, i-collimator, kunye ne-X-ray detector.Iifotoni ze-X-ray ziveliswa ityhubhu ye-X-ray, equkethe i-cathode kunye ne-anode, efakwe kwi-tube vacuum.Malunga ne-99% yamandla etyhubhu yeX-reyi iyachithwa njengobushushu, kwaye ngaphantsi kwe-1% yamandla iba yiX-reyi.Umqadi weX-reyi udityaniswa ube ngumqadi omxinwa omile okwefeni ngaphambi kokuba ufikelele kwisiza esilinganiswayo.I-collimator isetyenziselwa ukulawula kunye nokunyanzeliswa kwentsimi ye-irradiation ye-imaging beam ukuze kuqinisekiswe ukuba i-beam ingakwazi ukugubungela ngokuchanekileyo indawo esebenzayo ye-imaging ye-detector.I-X-ray beam idlula kwindawo yesifundo kwaye ikhethwa ngokukhethekileyo lithambo kunye nezicubu ezithambileyo kuloo ndawo.Xa i-X-ray beam idlula kwisigulane, ibetha i-X-ray detector, kwaye ubukhulu bemitha emva kokudlula emzimbeni buguqulwa bube yimiqondiso yombane kwaye irekhodwe.
I-Whale3025/1613 yochungechunge oluguquguqukayo lwepaneli ye-flat detector ephuhliswe ngokuzimeleyo nguHaobo ithatha i-amorphous silicon (a-Si) iteknoloji yezinto eziphathekayo, eneempawu zomgangatho ophezulu womfanekiso, uluhlu olukhulu oluguquguqukayo kunye noluhlu olubanzi lwezicelo ze-terminal.Inezixhobo ezininzi ezilawulwa yinkqubo yokulungelelanisa, ezingenako ukuhlangabezana neemfuno zokusetyenziswa kovakalelo oluphezulu, kodwa ziphinde zihlangabezane neemfuno zeemeko ezinkulu zoluhlu oluguquguqukayo, kwaye lunokutshintshwa ngokubanzi kwiimfuno zesicelo sokufumanisa unyango.
Ingcebiso yemveliso yeHardware
Ixesha lokuposa: Jul-14-2022