1.5T vs 3T MRI - pali kusiyana kotani?

Ma scanner ambiri a MRI omwe amagwiritsidwa ntchito pazamankhwala ndi 1.5T kapena 3T, ndi 'T' yomwe imayimira gawo la mphamvu yamaginito, yotchedwa Tesla. Ma scanner a MRI okhala ndi ma Tesla apamwamba amakhala ndi maginito amphamvu kwambiri mkati mwa makinawo. Komabe, chachikulu nthawi zonse chimakhala bwino? Pankhani ya mphamvu ya maginito ya MRI, sizili choncho nthawi zonse.

MRI yamphamvu kwambiri yamaginito sikutanthauza kuyezetsa bwino komanso kuzindikira zachipatala. M'malo mwake, kusankha koyenera kwa MRI kumadalira pazifukwa zosiyanasiyana komanso malingaliro, monga ziwalo zenizeni zomwe zikujambulidwa, chitetezo cha odwala komanso chitonthozo, komanso mawonekedwe azithunzi. Ndiye, ndi liti pamene kuli koyenera kugwiritsa ntchito sikani ya 1.5T kapena 3T? Tiyeni tione kusiyana kwakukulu pakati pa ziwirizi.

Chitetezo ndi Liwiro la Zithunzi

Kuwongolera kuthamanga kwa scan ndi kusunga kutentha kwa thupi kumakhala kovuta mu MRI ya thupi lonse. Chimodzi mwazopangidwa ndi MRI ndikuwonjezera kutentha kwa thupi, popeza minofu ya thupi imayamwa mphamvu yamagetsi panthawi yojambula, yotchedwa Specific Absorption Rate (SAR). Mukasanthula ndi makina a 1.5T, malire otenthetsera amafikira pamalo ena pakujambula. Ngati masikani omwewo akadachitidwa ndi sikani ya 3T, kutentha kwa thupi kuyenera kukwera kuwirikiza kanayi, kupitirira malire a kutentha ndi kanayi. Pali njira zothetsera vutoli, monga kuyika masikelo kuti muonjezere nthawi yojambulira kapena kuchepetsa kusintha kwa masikelo. Choncho, kugwiritsa ntchito 1.5T MRI ndikwabwino chifukwa kumapereka chidziwitso chomasuka komanso chotetezeka kwa wodwalayo popanda kusokoneza khalidwe lachifanizo.

Kusanthula Odwala Ndi Implants

Chodetsa nkhawa kwambiri pamayesero aliwonse amajambula ndi kuchuluka kwa chitetezo, chifukwa chake mayeso onse amajambula amakhala ndi malangizo okhwima. Ponena za MRI, nthawi zambiri, odwala amatha kufufuzidwa mosamala pogwiritsa ntchito makina a 1.5T ndi 3T MRI.

Komabe, mphamvu ya maginito yapamwamba imabwera ndi zoopsa zambiri. Odwala omwe ali ndi ma implants azitsulo ndi zipangizo, kuphatikizapo pacemakers, kumva AIDS, ndi mitundu yonse ya implants, amatha kukhudzidwa ndi maginito a 3T scanner. Choncho, odwalawa angakhale otetezeka ndi 1.5T MRI scanner.

Kujambula khalidwe

Kulondola kwa zithunzi za MRI ndikofunikira kuti muzindikire molondola komanso kuzindikira zolakwika m'thupi. Nthawi zambiri amaganiziridwa kuti MRI yokhala ndi mphamvu zamaginito ipanga zithunzi zapamwamba kwambiri. Ngakhale izi zimakhala zowona nthawi zina, makina a 1.5T MRI ndi osinthika pojambula zithunzi, pamene makina a 3T MRI amagwiritsidwa ntchito kuti azitha kujambula zithunzi zambiri zamagulu ang'onoang'ono monga ubongo kapena dzanja.

Ubwino wa zithunzi za MRI ndi wofunikira kuti muzindikire molondola komanso kuzindikira zolakwika. Chojambulira cha 3T MRI ndi choyenera kujambula madera ang'onoang'ono monga ubongo ndi ziwalo zing'onozing'ono. Komabe, mphamvu ya maginito yapamwamba ikhoza kukhala lupanga lakuthwa konsekonse.Chomwe chimachepa ndi chakuti makina a 3T MRI amatha kutengeka kwambiri ndi zojambula zojambula. Zolepheretsa zopitirirabe za 3T mumsana ndi thupi zimaphatikizapo kutengeka kuchokera ku gasi m'matumbo, omwe amatha kubisa ziwalo zozungulira, komanso mphamvu ya dielectric, kumene madera a chithunzicho amawoneka mdima chifukwa cha mawonekedwe a radiofrequency omwe amagwiritsidwa ntchito mu kujambula kwa 3T. Palinso kuwonjezeka kwa zinthu zopangidwa ndi madzi. Zonsezi zimatha kukhudza mtundu wa sikaniyo.

Mu Mawu

Ngakhale zingawoneke ngati MRI scanner yapamwamba kwambiri ndiyo njira yabwino kwambiri, si nkhani yonse. M'dziko langwiro, akatswiri a radiology angafune kuti MRI ipange zithunzi zapamwamba kwambiri kwa odwala awo mwachangu komanso mosatekeseka. Komabe, zenizeni zimasonyeza kuti simungakhale nawo popanda kunyengerera. Ndiye, kodi mupeza masikelo othamanga motengera mtundu wazithunzi? Kapena kusankha sikani yotetezeka, koma pachiwopsezo choyika odwala pamakina nthawi yayitali? Yankho lolondola limadalira makamaka ntchito yoyamba ya MRI.

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