Flat Panel Devenctors anotamba basa rakakosha muDhijitari radiography (Dr), semhando yavo yemhando yemhando inobata zvakananga kukosha uye kushanda kwekuongororwa. Unhu hwemaflat panel Dection mifananidzo inowanzo kuyerwa ne modulation transter basa (mtf) uye Quantum Shanduko inobudirira (DQE). Izvi zvinotevera kuongororwa kwakadzama kwezvikamu zviviri zviratidzo uye zvinhu zvinokanganisa DQE:
1, Modulation Transferting Basa (MTF)
Modulation Transferting basa (MTF) kugona kwehurongwa kubereka fredual frequency chikamu chechinhu chakaongororwa. Inoratidza kugona kwekufungidzira kwehurongwa hwekusiyanisa mufananidzo wemifananidzo. Iyo yakakodzera kufungidzira system inoda 100% kubereka kweiyo fungidziro yezvinhu, asi chokwadi, iyo yakakura kukosha, iyo yakasimba yekufungidzira mamiriro ekufungidzira kubereka zvinhu zvechinhu chakaongororwa. Kune dijitari X-ray ingafungidzira masisitimu, kuongorora maitiro avo ekufungidzira, zvakafanira kuverenga iyo Pre yeTre Sampled MTF iyo isinganyanyokanganiswa uye zvakavakirwa kuhurongwa.
2, Quantum Shanduko Inobudirira (DQE)
Quantum Shanduko Kubudirira (DQE) kuratidzwa kwekugona kwekutapurika kwekufungidzira sisitimu masaini uye ruzha kubva pakuisa kunze, yakaratidzwa sepesenti. Inoratidza manzwiro ekunzwa, ruzha, x-ray dosi, uye density kugadzirisa kweiyo flat panel detel. Yakakwira iyo DQE kukosha, iyo yakasimba yekuona kugona kusiyanisa kusiyana kwematehwe ematehwe.
Zvinhu zvinokanganisa DQE
Kuverengera kweScintillation Zvinyorwa: muAmorphous Silicon Flat Panel Dec Dollencors, iyo yekuvhara yeScintillation zvinyorwa ndeimwe yezvinhu zvakakosha zvine chekuita neDQE. Kune marudzi maviri akajairika e scintillator yekubatanidza zvinhu: Cesium iodide (CSI) uye Gadolinium OxYYLFide (GD ₂ O ₂ S). Cesium Iodide ine kugona kwakasimba kushandura X-rays mumwenje unooneka kupfuura Gadolinium OxYYLIDS, asi pamutengo wepamusoro. Kugadzirisa Cesium Iodide muColumnar chimiro kunogona kuwedzera kuwedzera kugona kwekutora X-rays uye kuderedza kupatsanurwa. Detector akabatanidzwa neGadolinium oxyyulfide ine chiyero chekufunga, uye mutengo wakaderera, asi kugona kwekushandurwa kwacho hakuna kukwirisa senge kweiyo cesium iodide cooting.
Vanotengesa: Iyo nzira iyo inoonekwa mwenje inogadzirwa neyechizi inoshandurwa kuita masairwi masaini inogona zvakare kubata DQE. Mune flat panel fanic yeCesium yeCesium Iodide (kana Gadolinium Turnistor) MuAmorphous Selenium Flat Panel Deyer Deyer Inoita Kuti Yemagetsi Hourge Pealsphous Sealenties
Uye zvakare, kune imwe mhando yerudzi rweflat panel detector, iyo dQE inosiyana pane dzakasiyana spatial resolution. Iyo yakanyanya dqe yakakwira, asi hazvireve kuti dqe yakakwira pane chero spatial resolution. Iyo Colculation Fomula yeDQE ndeye: DQE = S ² × ² ² / (NPS INYAYA YEMADZIMAI YEMAHARA,
3, Kuenzanisa kweAmorphous Silicon uye Amorphous Selenium Flat Panel Decience
Mhedzisiro yemasangano epasi rese inoratidza iyo inofananidzwa neAmorphous Silicon Flat Panel Deenzi Sezvo spatial resolution inowedzera, iyo mtf yeAmorphous Silicon Flat panel Defices inodzikira, nepo Amorphous Seenium Flat Dollol Contector achiri kugona kuchengetedza mtf yakanaka. Izvi zvine chekuita neiyo fungidziro yeAmorphous Selenius Flat Panel Deel Screen that inoshandura zvakananga chiitiko chisingaonekwe X-ray maficha mumagetsi masaini. Amorphous Selenium Flat Panel Doel Dhizaina kana kugadzirwa kana kuparadzira mwenje unoonekwa, saka vanogona kuwana yakakwirira spatial resolution uye zviri nani mufananidzo mhando.
Mukupfupikisa, mhando yemufananidzo wefurati rezvikamu zvakakanganiswa nezvakakanganiswa nezvakaringana, pakati peMTF uye DQE zvinhu zviviri zvakakosha zviyero. Kunzwisisa uye kugona izvi zviratidzo uye zvinhu zvinokanganisa dqe zvinogona kutibatsira kusarudza zvakanaka uye kushandisa fureni pane zvekutarisa, nokudaro kugadzirisa kufungidzira kunaka uye kuongorora kwechokwadi.
Kutumira Nguva: Dec-17-2024