A asalinsa, a CT Scanner yana aiki ta hanyar haɗa fasahar X-ray tare da nagartaccen sarrafa kwamfuta. Ba kamar madaidaicin X-ray wanda ke ɗaukar hoto ɗaya ba, CT Scanner yana jujjuya bututun X-ray da kuma ganowa a kusa da majiyyaci, yana samun hotuna da yawa ('yanke') daga kusurwoyi daban-daban. Ana sake gina waɗannan sassan ta hanyar kwamfutoci masu ƙarfi zuwa cikakkun hotuna na 2D da 3D na ƙasusuwa, tasoshin jini, kyallen takarda, da gabobin. Radiyoyin ionizing da CT Scanner ke amfani da shi yana da isasshen kuzari don wucewa ta jiki da ƙirƙirar waɗannan hotuna, amma kuma yana ɗaukar yuwuwar yin hulɗa da DNA ta salula.
Adadin radiation da CT Scanner ke bayarwa ana auna shi a millisieverts (mSv). Adadin ya bambanta sosai dangane da sashin jikin da aka bincika da takamaiman ƙa'idar da aka yi amfani da ita:
Shugaban CT: Yawanci 1-2 mSv
Kirji CT: Yawanci 5-7 mSv
Ciki/Kashi CT: Yawanci 7-10 mSv
Coronary CT Angiography: Zai iya kewayo daga 3-15 mSv dangane da yarjejeniya da fasaha
Don sanya wannan a cikin hangen zaman gaba, matsakaicin mutum a Amurka yana karɓar kusan 3 mSv kowace shekara daga tushen hasken halitta kamar radon, hasken sararin samaniya, da ma'adanai a cikin ƙasa. Hanya guda CT Scanner na ciki, don haka, tana ba da kashi daidai da shekaru da yawa na bayyanar asalin halitta. Duk da yake haɗarin da ke da alaƙa da gwajin gwaji guda ɗaya na CT Scanner ana ɗaukarsa ƙasa kaɗan ga manya, musamman idan ya cancanta ta likitanci, ƙa'idar ALARA (As Low as Reasonably Achievable) tana da mahimmanci. Wannan ka'ida tana tafiyar da kowane bangare na kariya ta radiation a cikin wuraren CT Scanner, tabbatar da cewa ana rage yawan adadin radiation koyaushe ba tare da lalata ingancin tantancewar hotuna ba.
Rage hasashewar radiation kafin CT scan ɗin ku
Kariya ta fara tun kafin ka kwanta akan teburin CT Scanner. Matakai masu fa'ida da aka ɗauka a lokacin tsarawa da lokacin shirye-shirye suna da mahimmanci don rage tasirin hasken da ba dole ba:
Gaskiya da Dace: Mafi mahimmancin mataki shine tabbatar da gwajin CT Scanner ya zama dole da gaske. Likitan da ke magana da likitan rediyo za su auna fa'idodin bincike a hankali akan yuwuwar haɗarin radiation. Suna la'akari:
Alamar asibiti: Shin CT Scanner shine mafi kyawun gwaji don amsa takamaiman tambayar asibiti? Za a iya madadin yanayin hoto kamar duban dan tayi ko MRI (wanda ba ya amfani da hasken ionizing) zai iya samar da mahimman bayanai?
Hoto na baya: Shin kun sami irin wannan hoton kwanan nan? Yin bita kafin sikanin na iya guje wa kwafi.
Tarihin Marasa lafiya: Abubuwa kamar shekaru, yanayin ciki, da tarihin bayyanar hasken da ya gabata suna da mahimmanci. Yara da matasa gabaɗaya sun fi kula da radiation.
Haɓaka ka'idar Scan: Da zarar an sami barata, ƙungiyar rediyo ta keɓance ka'idar CT Scanner musamman don ku da tambayar ku ta asibiti. Wannan ingantawa ya ƙunshi:
Ƙayyadaddun Ƙirar Dubawa: Daidaita ma'anar wurin da za a bincika don guje wa haskaka sassan jikin da ba dole ba.
Saitunan Canjin Kashi: Tsarin Scanner na CT na zamani yana da nagartaccen software (kamar Gudanar da Bayyanawa ta atomatik - AEC) wanda ke daidaita fitowar radiation ta atomatik a cikin ainihin lokacin dangane da girman majiyyaci da girman ɓangaren jikin da ake dubawa. Yankuna masu bakin ciki ko ƙananan yankuna suna samun ƙarancin radiation.
kVp da mAs Zaɓin: Masanin rediyo ko masanin fasaha ya zaɓi mafi kyawun ƙarfin wutar lantarki (kVp) da samfurin bututu na yanzu (mAs) - abubuwan da aka ƙayyade na farko na ƙwayar radiation - dangane da girman mai haƙuri da aikin bincike. Ana amfani da ƙananan saituna a duk lokacin da aka yarda da ganewar asali.
Algorithms na Sake Gina Iterative: Wannan babban ci gaban fasaha ne. Madadin tsinkayar baya na al'ada, sake ginawa yana amfani da hadaddun ƙirar lissafi da dabarun rage amo don samar da hotuna masu inganci daga ƙarancin ƙarancin bayanan radiation. Manyan masana'antun CT Scanner kamar waɗanda aka nuna akan dandamali kamar Mecan Medical suna haɓaka waɗannan ƙarfin rage kashi. Misali, tsarin ci-gaba na iya rage kashi 30-60% idan aka kwatanta da tsoffin hanyoyin sake ginawa yayin kiyayewa ko inganta ingancin hoto.
Umarnin Shirye-shiryen Mara lafiya: Bayyanar sadarwa yana da mahimmanci:
Cire Abubuwan Karfe: Kayan ado na ƙarfe, tufafi masu zippers ko maɗaukaki, ko ma wasu na'urorin likitanci na iya haifar da kayan tarihi akan hotuna. Wadannan kayan tarihi na iya buƙatar sake dubawa, ninka adadin radiation. Bin umarnin cire karfe yana hana wannan.
Azumi don Kwatankwaci: Idan jarrabawar CT Scanner ɗin ku na buƙatar kayan bambanci na jini (IV), ana iya tambayar ku kuyi azumi na ƴan sa'o'i kafin. Duk da yake da farko don aminci da ingancin hoto, wannan kuma yana tabbatar da ci gaba da binciken ba tare da jinkiri ba wanda zai iya haifar da damuwa ko motsi na buƙatar maimaitawa.
Bayanin Ciki: Yana da matuƙar mahimmanci don sanar da CT Scanner technologist da likitan ku idan akwai yuwuwar kuna da juna biyu. Yayin da hasken hasken kai tsaye ya haɗu a hankali zuwa wurin da ake sha'awa, watsawar radiation zai iya isa ga wasu sassan jiki. Za a dauki matakan kariya na musamman, gami da garkuwar ciki ko yiwuwar jinkirta binciken, idan an tabbatar da ciki ko ake zargin ciki.
Kare jikinka daga radiation yayin bincikenka
Da zarar an sanya ku akan Teburin Scanner na CT , an mayar da hankali kan aiwatar da kariyar jiki da fasaha yayin ainihin siyan hoto:
Garkuwar Tushen Hardware:
Don Gaɓoɓin Gaɓoɓi A Wajen Filin Scan: Idan wurin dubawa ya yi nisa da gabobin da ke da saurin radiyo kamar thyroid, nono, ko gonads, za a iya sanya rigar gubar ko garkuwa ta musamman (misali, garkuwar nono bismuth, garkuwar gonad) a kan waɗannan wuraren don toshe tarwatsa radiation. Wannan yana da mahimmanci musamman ga marasa lafiya na yara da matasa.
Don Ma'aikata: Masana fasaha suna aiki da CT Scanner daga ɗakin sarrafawa mai kariya, wanda aka kiyaye shi ta bango da tagogi masu lulluɓe. Suna shiga dakin binciken ne kawai idan ya cancanta, sanye da rigar gubar idan dole ne su kasance kusa da majiyyaci yayin saitin ko allura.
Gubar Aprons da Garkuwa: Yayin da ba a saba amfani da shi kai tsaye a filin binciken don siyan CT Scanner na zamani (kamar yadda za su iya haifar da kayan tarihi da tsoma baki tare da AEC), garkuwar gubar har yanzu tana aiki da dabara:
Haɗin kai: CT Scanner yana amfani da madaidaitan masu haɗa katako don siffanta katakon X-ray sosai zuwa faɗin abubuwan ganowa da takamaiman kauri da ake buƙata. Wannan yana rage yawan adadin nama da aka haskaka a waje da wurin da ake sha'awa, rage duka fiɗawar katako na farko da watsawa.
Advanced CT Scanner Technologies: Ƙirar da iyawar CT Scanner kanta su ne mafi ƙarfi kayan aikin don rage kashi yayin binciken:
Ikon Bayyanawa ta atomatik (AEC): Kamar yadda aka ambata a baya, wannan daidaitaccen tsari ne akan tsarin CT Scanner na zamani. Na'urori masu auna firikwensin suna auna raguwar haskoki na X-ray da ke wucewa ta cikin majiyyaci a ainihin lokacin yayin da bututu ke juyawa. Tsarin nan take yana daidaita bututu na yanzu (mA) don isar da mafi ƙarancin radiation da ake buƙata don hoton ganowa a kowane takamaiman matsayi na kusurwa da matakin jiki. Wannan ya fi inganci fiye da yin amfani da ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙaya suke amfani da su ke yin amfani da su.
Sake Gina Iterative (IR) da AI-Driven Sake Gina: Wannan shine zance mafi mahimmancin ci gaba na kwanan nan. Hanyoyin sake ginawa na al'ada (Filtered Back Projection - FBP) na buƙatar mafi girman allurai na radiation don samar da hotuna tare da matakan ƙararrawa. Algorithms na IR suna aiki akai-akai, suna kwatanta ɗanyen bayanan tsinkaya tare da simintin hoto, gyara amo da rashin daidaituwa. Na'urori masu tasowa, kamar waɗanda manyan masu samar da CT Scanner ke bayarwa, sun haɗa da basirar wucin gadi (AI) don haɓaka rage yawan hayaniya da ingancin hoto daga saye-sayen marasa-ƙasa. Wannan yana ba da damar rage yawan kashi (sau da yawa 50% ko fiye idan aka kwatanta da FBP) ba tare da sadaukar da amincewar bincike ba.
Spectral CT (Dual-Energy CT): Wasu ci-gaba na CT Scanner tsarin iya samun bayanai a daban-daban matakan X-ray makamashi matakan lokaci guda. Wannan yana ba da ƙarin bayanin siffanta abu (misali, bambanta uric acid daga calcium a cikin duwatsun koda, ko cire ƙashi daga hotunan jijiyoyin jini). Spectral CT na iya wasu lokuta maye gurbin sikanin sikanin da yawa ko kunna ƙananan ka'idoji ta hanyar samar da ƙarin bayani daga saye ɗaya.
Photon-Counting Detectors (PCD): Suna wakiltar ƙarshen fasaha na CT Scanner, PCDs kai tsaye suna ƙididdige hotunan hoto na X-ray kuma suna auna ƙarfinsu. Wannan yana ba da ingantaccen ingancin kashi (ƙananan kashi don ingancin hoto ɗaya), ingantacciyar ƙudirin sararin samaniya, da ingantattun damar iya gani idan aka kwatanta da na yau da kullun masu gano kuzari. Duk da yake har yanzu bai cika ko'ina ba, PCD-CT yana fitowa cikin sauri azaman mai canza wasa don hoto mai ƙarancin-ƙasa.
Haɗin kai na haƙuri: Matsayinku yayin dubawa yana da mahimmanci ga ingancin hoto da rage girman kashi:
Riƙe Har yanzu: Duk wani motsi yayin siyan CT Scanner yana haifar da ɓoyayyen abu da kayan tarihi. Idan Hotunan ba a gano su ba, ana iya buƙatar sake duba hoton, tare da ninka bayyanarwar ku. Bin umarnin numfashi daidai (misali, 'riƙe numfashi') yana da mahimmanci, musamman don duba ƙirji da ciki.
Matsayi: Daidaitaccen matsayi kamar yadda masanin fasaha ya umarta yana tabbatar da hoton ya rufe wurin da ake so da kyau kuma yana rage buƙatar sake dubawa.
Tambayoyin da ake yawan yi
Tambaya: Shin radiation daga CT Scanner yana da haɗari? A: Adadin radiation daga guda ɗaya, na'urar daukar hoto na CT Scanner na likitanci ana ɗauka gabaɗaya yana ɗaukar haɗari kaɗan, musamman ga manya. Amfanin ingantaccen ganewar asali yawanci ya fi wannan ƙaramin haɗari. Koyaya, ƙa'idar ALARA ana bin ƙa'idar sosai don kiyaye adadin gwargwadon iyawa. Haɗarin yana tattare da tarawa, don haka ya kamata a guji yin sikanin da ba dole ba koyaushe.
Tambaya: Ta yaya radiation daga CT Scanner ya kwatanta da sauran kafofin? A: Dubi teburin da ke ƙasa don kwatance:
Tushen Radiation
Na Musamman Ingantacciyar Kashi (mSv)
Daidai Lokacin Radiation na Bayanan Halitta
X-ray na ƙirji ɗaya
0.1
~kwana 10
Jirgin zagaye-zagaye daga NY zuwa LA
0.04
~4 kwana
Mammogram (kallo ɗaya)
0.4
~7 makonni
Shugaban CT Scanner
1-2
~ watanni 6 - shekara 1
Ƙirji CT Scanner
5-7
2-3 shekaru
Ciki/Pelvis CT Scanner
7-10
3-4 shekaru
Matsakaicin Radiation Bayan Shekara (US)
3.0
shekara 1
Tambaya: Shin yara sun fi kula da CT Scanner radiation? A: iya. Yara suna da saurin rarrabuwar sel da kuma tsawon rai a gaba, ma'ana akwai ƙarin lokaci don yuwuwar tasirin radiation don bayyana. Hakanan suna karɓar kashi mafi inganci don sikanin guda ɗaya idan aka kwatanta da babba saboda ƙananan jikinsu suna ɗaukar ƙarin radiation dangane da girmansu. Don haka, ana daidaita ka'idojin Scanner na CT na yara sosai ('ka'idojin kula da yara') ta amfani da ƙananan saitunan kashi, ƙwararrun AEC, da dabarun IR. Garkuwar gabobi masu mahimmanci kuma an fi amfani da su.
Tambaya: Menene ake yi don sa CT Scanner ya fi aminci? A: Filin yana ci gaba koyaushe. Mahimman abubuwan sun haɗa da:
Faɗin karɓowa na Iterative & AI Sake Gina: Wannan shine babban al'amari guda ɗaya wanda ke ba da damar yin bincike na yau da kullun.
Advanced Dose Modulation: ƙwararrun tsarin AEC waɗanda ke daidaita daidai da tsarin jikin haƙuri.
Spectral CT: Rage buƙatar bincike da yawa da ba da damar ƙa'idodin ƙanƙanta.
Photon-Kidaya CT: Bayar da ingantattun juyin juya hali a cikin ingancin kashi da ingancin hoto.
Tsanani Tsari & Amincewa: Dole ne kayan aiki su bi ƙayyadaddun iyaka da shirye-shiryen sarrafa inganci (misali, amincewar ACR a Amurka).
Kula da Kashi & Bibiya: Tsarin da ke yin rikodi ta atomatik da bin diddigin adadin radiation na haƙuri a cikin gwaje-gwajen hoto da yawa don hana haɗuwar wuce gona da iri.
Tambaya: Shin ya kamata in damu game da wakilai masu bambanta? A: A wasu lokuta ana amfani da ma'auni na bambanci na IV (na tushen iodine) ko na baki / madaidaicin ma'auni don haɓaka ingancin hoto ta hanyar nuna alamun jini ko takamaiman gabobin. Duk da yake gabaɗaya amintattu, suna ɗaukar haɗari daban-daban (misali, rashin lafiyar jiki, batutuwan koda) fiye da radiation. An yanke shawarar yin amfani da bambanci bisa ga buƙatun bincike, yin la'akari da fa'idodinta akan waɗannan ƙayyadaddun haɗari, mai zaman kansa daga ƙwayar radiation daga CT Scanner.
Tambaya: Ta yaya zan iya tabbatar da na'urar Scanner ta CT tana amfani da ƙananan dabaru? A: Fitattun wurare suna ba da fifiko ga amincin radiation. Nemo:
Amincewa: Irin su daga Kwalejin Radiology ta Amurka (ACR) ko makamantan ƙungiyoyi a wasu ƙasashe, waɗanda ke ba da umarnin haɓakawa da sa ido sosai.
Kayan Aiki na Zamani: Kayayyakin da ke saka hannun jari a cikin sabbin samfuran CT Scanner (kamar waɗanda ke dalla-dalla akan wuraren kayan aikin likitanci na musamman) a zahiri suna da damar yin amfani da sabbin fasahohin rage kashi (AEC, IR, yiwuwar CT).
Ɗaliban Horarwa: Ƙwararrun ƙwararrun masana fasahar rediyo da masana rediyo waɗanda suka fahimta da amfani da ƙa'idodin ALARA da tsauri.
Fassarar Kashi: Ya kamata cibiyoyin su sami damar ba da bayanai game da allurai na yau da kullun don jarrabawar su kuma su shiga cikin rajistar kashi.
