Doing CT is us the thing that each person experiences possibly, although you had not done CT, want possibly also in the following day to use it. The progress of CT technology was human health facilities to make enormous contribution really, but the view that everybody also may have heard of to CT causes cancer. So is this view right after all be wrong?
Above all, dr Zhang also thinks CT has the advantage that cannot replace on diagnostic disease, if be medical treatment necessary, I think you are done with respect to what be at ease, because did CT,won't contract cancer with respect to meet with commonly. But if not be medical treatment necessary, still do not do, after all the ionization radiate that CT brings, have the risk that increases tumor incidence of a disease really. Dr Zhang says to everybody CT sends relevant issue of cancer below.
1, why to say CT may cause cancer?
Inquiry document can discover abroad has a few causes cancer relevant research about CT really, the ionization radiate that CT releases is to cause the body likely certain gene group produces not stable change, this kind of possibility exists really. This kind of not stable change may arrive hereditarily in duplicate filial generation, likely so generation generation passes on. Such, although be in,suffer did not produce genetic change according to cellular itself, but the critical condition that illuminate already made the cell is in canceration of a likelihood happening, come so, tumor mutation frequency happens to increase in filial generation cell. This kind of change may raise tumor incidence of a disease.
2, why to say CT causes cancer only, and does nobody say according to X line the examination causes cancer?
Because the radiation dosage of CT is the several hundredfold that X line checks, the ionization radiate dosage of X line can not promote the rate that causes cancer. But radiate of CT examination ionization is more than X line to check far. So, can say to check the ionization radiate of video diagnostic domain, great majority is arise by CT. Abroad has research to show, the public suffers add 1000mSv according to radiation dosage, its cancer occurence rate can increase 4. 1 ％ .
3, how does foreign research think?
A few experts of committee of science of effect of U.N. atom radiate once thought: Be in England 75 years old 0 of risk of cancer of above crowd accumulative total. 6 ％ ascribe diagnoses sexual radiation, among them basically CT examination brings this. England, United States and Dutch CT are used least, diagnostic sex radiation is measured also with respect to lowest, because this diagnoses sexual radiation be caused by to accumulate cancer incidence of a disease inferior, research shows have 0 only probably. The cancer patient of 4 ％ is OK ascribe diagnoses sexual radiation. Examination of use CT of this Japanese country is more, diagnostic sex radiation is measured is flower, 3 times of the country such as the United States, above the far outclass of cancer incidence of a disease that also is radiation be caused by a few countries, be in about 3.2% the left and right sides.
4, CT is better, is radiation amount larger?
As 64 helix CT the CT of higher even level gains ground gradually, examination layer is thick thinner and thinner, picture is clearer and clearer, the project that can consult is increasing, this is meddlesome. But, what accompany and come is personnel getting check acceptance radiation dose is higher and higher.
Above is Dr Zhang consults a few relevant knowledge that document sees, arrange, still suggest when to everybody should do CT, have something made to order, when ought not to be being done, do not have necessary taking CT to undertake convention examines system. Do CT unapt cause cancer, but do not have necessary CT to be able to be not done completely, do after all much CT increases tumor risk likely.
