Amalinga ndi Dr. Atul Gawandea, dokotala wa opaleshoni pachipatala cha Brigham ndi Women's ku Dana-Farber Cancer Institute, "Tikudziwa kuti kupanga ma scan 62 miliyoni chaka chilichonse kwa anthu 300 miliyoni sikofunikira komanso kuwononga, koma ndi koopsa. kupanga makumi masauzande a khansa" (NPR's "Morning Edition," September 3, 2009).
Makanema a Medical CT ndi PET amawonetsa anthu osachepera mamiliyoni anayi aku North America ku radiation yayikulu chaka chilichonse, kafukufuku watsopano akuwonetsa. Pafupifupi 400,000 aiwo amalandila Mlingo wokwera kwambiri, wokwera kuposa kuchuluka kwapachaka komwe kumaloledwa kwa zida zanyukiliya kapena ogwira ntchito pamalo a zida za nyukiliya kapena aliyense wogwira ntchito ndi zida zotulutsa ma radio, malinga ndi nkhani ya Ogasiti 27 mu New England Journal of Medicine, "Kuwonetsa Ma radiation Ochepa a Ionizing Radiation kuchokera ku Njira Zojambula Zachipatala."
PET imayimira "positron emission tomography" ndipo CT imatanthawuza "computed tomography." Positron ndi tinthu tating'onoting'ono tomwe timafanana ndi electron, kupatula ngati ili ndi mtengo wabwino. Kujambula kwa PET kumayamba ndi kubaya wodwala jekeseni ya ma radioactive tracer isotopu omwe kenako amawunjikana m'minyewa yomwe ikupimidwa. Ma radioactive element omwe amagwiritsidwa ntchito pa scan ndi awa:
- Mpweya-11
- Nayitrogeni-13
- Oxygen-15
- Fluorine-18
Kafukufuku watsopano sanayerekeze kuti ndi makhansa angati a radioactive CT ndi PET scans angayambitse pakapita nthawi. Dr. Rita Redberg, katswiri wa zamtima komanso wofufuza pa yunivesite ya California ku San Francisco, adauza a New York Times pa Ogasiti 27 kuti "masauzande" a khansa yowonjezera mwina imachokera kumankhwala otere. Kuphatikiza apo, kafukufuku wotchulidwa kawirikawiri wa 2001 ndi DJ Brenner wofalitsidwa mu American Journal ya Roentgenology ("Estimated Risks of Radiation-Induced Fatal Cancer from Pediatric CT") anamaliza kunena kuti, "Ku US, pafupifupi 600,000 m'mimba ndi mutu wa CT CT chaka chilichonse chaka chilichonse ana osakwana zaka 15, kuyerekezera kolakwika ndi kuti 500 mwa awa. anthu amatha kufa ndi khansa chifukwa cha radiation ya CT. "
"Ndizowona kuti pali chiwopsezo cha khansa pama radiation otsika ndipo mukachulukitsa ma radiation, mumakulitsa khansa," adatero Redberg. Mu 2007, Dipatimenti ya Health & Human Services inanena kuti chiwerengero cha CT scans omwe odwala a Medicare anaitanitsa chinawonjezeka pafupifupi kanayi pakati pa 1995 ndi 2005. Chiwerengero cha PET scans chinakwera mofulumira kwambiri. "Malamulo a federal amalola madokotala kuti apindule pogwiritsa ntchito makina omwe ali nawo kapena kubwereketsa," adatero Times lipoti. Dr. Reza Fazel, mlembi wamkulu wa kafukufukuyu, adati kugwiritsa ntchito makinawa kukuwoneka kuti kwakulanso pakati pa 2005 ndi 2007.
Mlingo wa radiation kwa odwala umayesedwa mu millisieverts. Anthu ambiri okhala ku US amapeza pafupifupi ma millisieverts atatu pachaka kuchokera ku kuyipitsidwa kwa radioactive ndi ma radioactivity omwe amapezeka m'chilengedwe. Kafukufuku watsopanoyu adapeza kuti pafupifupi odwala 4 miliyoni aku US amalandira Mlingo wopitilira 20 millisieverts, kapena 7 kuwirikiza kawiri pachaka kuchokera kumagwero ena. Mwa gululo, 10 peresenti, kapena 40,000, adalandira osachepera 50 millisieverts, "kuposa kuchuluka kwapachaka komwe olamulira a nyukiliya amalola," Times zanenedwa.
Gawande, powonekera pa "Morning Edition," adauza mtolankhani Ari Shapiro kuti, "Chisamaliro choyenera chingakhale kuzindikira [kuti] tikuyesa mutu kwa anthu omwe ali ndi mutu wamba, kuti tili kale ndi umboni wabwino ndi malangizo osonyeza kuti sichoncho. wanzeru kupanga scan."
M'nkhani yotsagana ndi August New England Journal Nkhaniyi, Dr. Michael Lauer analemba kuti, "Tiyenera kuganiza ndi kulankhula momveka bwino za zinthu zoopsa powonetsa odwala athu ku radiation."
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John LaForge ndi wotsogolera wa Nukewatch ndipo amasintha kotala. Amakhala pa Anathoth Community Farm ku Luck, Wisconsin.