Kodi kutentha kwa dzuwa kungakupatseni khansara? Yankho lalifupi ndilo inde. Malingana ndi Dipatimenti ya Zaumoyo ya Umoyo ku United States, kansa ya coloni imayamba chifukwa cha mlingo wa pafupifupi 1,000 millisieverts (mSv). Kuwonetsedwa kwa zosakwana 200 mSv kungayambitse khansa ya m'magazi ndi khansara ya chithokomiro, m'mawere, ndi m'mapapo. Ndipo khansa ya chiwindi ingayambidwe chifukwa cha kutsika kwa masentimita oposa 100.
Zowonjezera
Kotero, kodi iye amadziwa kuti ndi "millisievert" ndipo mumatani kuti musagwedezeke 100, 200, kapena 1,000? Millisievert ndi sayansi yayeso ya mlingo wa ma radiation. Popeza mbali zosiyanasiyana za thupi zili ndi madigiri osiyana siyana, zimatchulidwa kuti ndi "mankhwala othandiza." Mwachitsanzo, tiyeni tizinena kuti Org Body X ndi Org Y zimakhala ndi mazira khumi ndi awiri. Komabe, Bungwe Y ndilowiri kwambiri. Mlingo weniweniwo udzakhala 10 mSv kwa limba lililonse, koma mlingo wathanzi ukhoza kukhala 10 mSv kwa Org Body X ndi 20 mSv kwa Y organ.
Nkhani Zoipa
Nkhani yoipa ndi yakuti pafupifupi 80 peresenti ya kutuluka kwa dzuwa kumachokera ku malo achilengedwe, osapeĊµeka. Ambiri a ku America amapeza mlingo wokwanira pafupifupi masentimita 3 chaka chilichonse kuchokera ku radon, miyala, danga, nthaka, magetsi, ndi kuyenda kwa ndege. (Musanalumbirire ndege, kumbukirani kuti mumakhala pafupifupi 1 mSv of exposure kwa maola 200 pa nthawi ya kuthawa.)
Uthenga Wabwino
Uthenga wabwino ndi wakuti pamafunika kuchuluka kwa ma radiation kufika pamagulu omwe amachititsa khansa . Mukamadziwa nambalayi, mungapewe kudziwonetsera nokha ku zowonjezereka za ma radiation. Mwachitsanzo, ngati mukudandaula ndi kutuluka kwa dzuwa, mukhoza kusankha kukhala ndi colonoscopy (osati kutuluka kwa dzuwa) m'malo mwa enamasi ya barium (pafupifupi 7 mSv of radiation exposure).
Mlingo woyenera wa mankhwala omwe amawoneka bwino ndi awa:
- Ulendo wa ndege (0.005 mSv / ora)
- Barium enema (7 mSv)
- Chifuwa cha X-ray (0.10 mSv)
- CT yodwala mimba (10 mSv)
- CT scan of the bost (8 mSv)
- CT scan of mutu (2 mSv)
- Dokotala X-ray (0.09 mSv)
- Mamamogram (0.7 mSv)
- X-ray ya fuga (0.07 mSv)
- Dongosolo lonse la thupi la CT (10 mSv)
Zotsatira:
Nordenberg, Tamar. Chithunzi cha Thanzi: Ndizo Zomwe Zili ndi Ma X-ray, Njira Zina Zoganizira. US Food and Drug Administration. Feb. 1999. 27 Aug. 2006 [http://www.fda.gov/fdac/features/1999/199_xray.html].
Kuyeza kwa Mafilimu a X-ray. Mauthenga a Radiology. 27 Aug. 2006 [http://www.radiologyinfo.org/en/safety/index.cfm?pg=sfty_xray].
Kuvulaza Mvula. Merck Manual Information Medical. 1 Feb. 2003. 27 Aug. 2006 [http://www.merck.com/mmhe/sec24/ch292/ch292a.html].
Lembani za Carcinogens, Zolemba 11. Utumiki wathanzi. 27 Aug. 2006 [http://ntp-server.niehs.nih.gov/ntp/roc/toc11.html].
Kodi Mipira ya Mvula yotani kuchokera ku CT? Malo a Zipangizo ndi Zaumoyo Za Zamagetsi. 4 May 2005. 27 Aug. 2006 [http://www.fda.gov/cdrh/ct/risks.html].