How much dose before the increase?

How much of an increase?

Where is the dose delivered and how is the volume irradiated controlled?

Dear Dr. Mohammed Ubaid Hussein,

Certainly, the increase in radiation causes cancer

What increase in radiation dose? Is it a 1% increase in the dose from a chest x-ray or a 70% increase in the dose for a pelvic CT? What age is the patient. Which organs are exposed. What sex. What type of radiation. The answer is maybe yes and maybe no, depending on all the circumstances.

thank you for you.... answer you very important for me

Increasing the radiation dose is increase the risk and severity of deterministic radiation effects (acute and chronic radiation sickness) and risks of stochastic radiation effecrs (mainly, cancer)

Your question is is too much generic a stated by Prof

Malone. I we speak of radiotherapy , the side effects can be immediate or can take years to appear. There have been a revival on the question of secondary cancers after radiotherapy( you can check in the relevant journals), mainly because it will be possible to learn on the late effects of radiation.

If we speak of radiodiagnostics, the approach is completely different, as is related to low doses of radiation.

is this question about dose received during diagnostics or during radiotherapy? If radiotherapy, is this question about increasing the dose in the CTV using the same method (photon, proton, ion, ...) or about secondary dose due to the treatment method (pencil beam scanning vs scattering, or machine related secondary dose).

if diagnostic, is this in relation to treatment planning for radiotherapy?

the common aspect of all the cases above is the question, how much more dose in comparison to what? Depending on the fractional increase, one can find literature that says it does not matter within the statistical analysis available.

Thanks to my colleagues for interacting with me on this subject

One can measure the physical dose (Gy) only, but the prompt and delayed human effects are counted on sievert (Sv) basis. Both units express the absorbed energy per unit mass. (For gammas 1 Sv ~ 1 Gy.) Due the definition, the 5 Sv dose which is the half-letal dose for whole body irradiation,. may be allowed for a local (e. g. hand) medical treatment. Data on the delayed effects (i. e. side effects) can be read e. g. Article Late cancer and noncancer risks among Chernobyl emergency wo...

Article Thyroid Cancer Occurring as a Late Consequence of Head-and-N...

thank you dear egon janos szondi