Kusanthula kwa zisonyezo zazikulu ndi zomwe zimapangitsa kuti zinthu ziziwoneka bwino

Zojambula zapamwamba zimayendera gawo lofunikira mu digigraphy (Dr), monga chithunzi chawo chimakhudza molondola komanso kuchita bwino kwa matenda. Mtundu wa zithunzi zatsemphana wathyathyathya nthawi zambiri umayesedwa ndi kusinthasintha kusintha kwa ntchito (MTF) ndi njira zosinthira (DQE). Izi zikuwunika mwatsatanetsatane zizindikiro ziwiri izi ndi zinthu zomwe zimakhudza dqe:

1, Kusintha Kusintha kwa Ntchito (MTF)

Kusintha kwa Kusintha kwa Mozombo (MTF) ndi kuthekera kwa dongosolo kuti muletse kuchuluka kwa chinthu chofanizira. Zimawonetsa kuthekera kwa dongosololi kuti musiyanetsatane wamafanizo. Dongosolo labwino la kulingalira limafunikira kubereka kwa 100% kwa chinthu cha chinthu chopendapo, koma zenizeni, chifukwa cha zinthu zosiyanasiyana za MTF nthawi zonse zimatha kubereka tsatanetsatane wa chinthu choyerekeza. Kwa makina a digito X ray, kuti awone mtundu wawo woganiza, ndikofunikira kuwerengera prepled MTF zomwe sizikhudzidwa ndi zomwe sizikhudzidwa komanso mwatsatanetsatane.

2, kutembenuka kosinthika (DQE)

Kutembenuka kwa Quantum (DQE) ndi mawu osonyeza kufalitsa kufalitsa kwa njira yofalitsira signals ndi phokoso kuchokera ku zotulutsa, zofotokozedwa ngati gawo. Zimawonetsa chidwi, phokoso, x-lyy, kusinthana kwa chojambula chathyathyathya. Mtengo wapamwamba wa DQE, wamphamvu wotsutsa amatha kusiyanitsa kusiyana kwa minofu.

Zinthu Zomwe Zimakhudza Dqe

Kukutiza zinthu: mu amorphious silicon osalala ojambula, kuphatikizika kwa zinthu zina ndi chimodzi mwazinthu zofunika zomwe zimakhudza DQE. Pali mitundu iwiri yofananira: Csisium iodide (csi) ndi gadolinium oyassul (gd ₂ ₂ s). Cisium Iodide ali ndi kuthekera kwamphamvu kusinthira ma X-ray kukhala kuwala kowoneka bwino kuposa gadolinium oxysulfide, koma pamtengo wokwera. Kukonza csium iodide kukhala kapangidwe ka Columnar kungalimbikitse kuthekera kogwira x-ray ndikuchepetsa kuwala. Cholemba chomwe chimapezeka ndi gadolinium oxsulfide ali ndi mtengo wolingalira mwachangu, ntchito yokhazikika, komanso mtengo wotsika, koma kutembenuka kwake sikukula kwambiri.

Omasulira: Njira yomwe kuwala komwe kumapangidwira ndi scrintillators kumasinthidwa kukhala zizindikiro zamagetsi kungakhudzenso DQE. M'matumba osalala okhala ndi kapangidwe ka Cesium Iodide (kapena gadolinium oxidelfide) + tracktor transistor (TFT), osawoneka bwino kwambiri monga momwe mulibe tsamba pakati, chifukwa cha DETY WOPHUNZITSIRA. Mu amorphous Selenium Fayilo yoyendetsa bwino, kutembenuka kwa X-rays a magetsi kumadalira onse elerrous stalese wosanjikiza, ndipo kuchuluka kwa DQE

Kuphatikiza apo, kwa cholowa chomwecho cha cholowa chathyathyathya, chimasinthasintha mosiyanasiyana. Kuchulukitsa kwambiri kumakhala kokwera, koma sizitanthauza kuti DQE ndiyokwera pazinthu zilizonse. Njira yowerengera ya DQE ndi: DQE = s × 1 × ray protery exctor spectramu yolingana.

　3, kufananiza Sicous Sicon ndi Amorphous Selenium Falners

Zotsatira zomwe zimapangitsa kuti mabungwe apadziko lonse lapansi akuwonetsa kuti poyerekeza ndi amorphious silicon flatner, amorphous Selenium Fardior ali ndi mfundo zabwino za MTF. Monga momwe malowo amasinthira, mtf ya amorphious silicon osalala mwachangu amachepetsa, pomwe amorphous Selenium Fayilo imatha kukhalabe ndi zabwino za MTF. Izi ndizogwirizana kwambiri ndi malingaliro a amorphous Selenium senti ya thabwa yomwe imasintha mwachindunji zithunzi za X-ray kukhala zizindikiro zamagetsi. Amorphous Selenium Fayilo yoyang'ana panel sabereka kapena kuwalitsa kuwala kowoneka bwino, chifukwa chake amatha kukwanitsa kusintha kwapamwamba komanso mawonekedwe abwino.

Mwachidule, mawonekedwe a mawonekedwe athyathyathya amakhudzidwa ndi zinthu zosiyanasiyana, zomwe mtf ndi dqe ndi zizindikiro ziwiri zofunika. Kuzindikira ndi Kuzindikira Izi ndi zinthu zomwe zimakhudza DQE zitha kutithandizanso kusankha ndikugwiritsa ntchito zowunikira mosamala, potero kukonza maganizidwe olingalira bwino komanso kuzindikira.