Examples of using Deterministic effects in English and their translations into Portuguese
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Other organs should not be affected in such a way that deterministic effects will occur.
Deterministic effects are those caused by the decrease in or loss of organ function due to cell damage or cell death.
Radioprotection should prevent the occurrence of deterministic effects and reduce the stochastic effects. .
Deterministic effects are those caused by the decrease in or loss of organ function due to cell damage or cell death.
J If tissue is exposed at annual doses not exceeding about 500 mGy y1 for several years, deterministic effects are not likely.
Those risks are related to skin lesions deterministic effects and to an increase in the incidence of neoplasia stochastic effects. .
Deterministic effects have been observed after massive irradiation in utero, but dose levels incurred by family or close friends from a treated patient are far below the threshold for such effects. .
If the dose to the unborn child would result in severe deterministic effects or lead to a high probability of stochastic detriment, the termination of pregnancy should be considered.
Deterministic effects, or tissue reactions, are characteristic of the high doses and depend directly on such an exposure, as cellular death for example, of malignant cells submitted to radiotherapy, skin burns, sterility or occurrence of cataracts.
In interventional radiology and radiotherapy the possibility of unintended deterministic effects must be taken into account and measures taken to avoid such effects. .
As regards deterministic effects, there is a possibility of occurrence of severe radio-induced lesions, erythema, epilation, necrosis, sterility and cataract.
The skin absorbed dose in the most irradiated region and the Ka,r are considered as the appropriate magnitudes for estimating the risk for occurrence of deterministic effects such as erythema, alopecia and sterility, while PKA is utilized for estimating the occurrence of stochastic effects such as cancer.
The deterministic effects occur when generalized or localized irradiation in the body causes more cell death than the organism can compensate for threshold of clinical effects. .
Considering that exposure to ionizing radiation can cause stochastic and/or deterministic effects, the professionals should have the knowledge on doses and undergo monthly monitoring, as well as utilize RPCs.
On this context, investigations were performed in heart dosimetry, applied to the usual radiopharmaceuticals for mpi, based on computational tools, physical phantom simulators, and radiobiological studies. following,investigations in radiobiology and in possible deterministic effects were addressed.
The occupational exposure in hemodynamics is associated with the occurrence of deterministic effects. The thyroid and the crystalline are examples of organs under risk of appearance of such effects, although well documented case reports are scarce.
The practice of not recording data on patients and procedures, such as biometric data, exposure time, kerma and PKA, hinders the performance of studies andthe possibility of follow-up in those cases where the exposure levels are close to the deterministic effects threshold.
The ICRP recommends that every effort must be made to keep doses below those at which serious deterministic effects occur, i.e. an effective dose of 1 Sv or an equivalent dose of S Sv to the skin, for all actions, except life-saving actions, for which higher doses may be justified.
Interventional radiology is one of the applications of radiation in medicine whose benefits should exceed the risks, in compliance with the first and most fundamental principle of radiological protection, the principle of justification, even being the radiological practice with the highest levels of medical and occupational exposures,sometimes reaching the levels of deterministic effects.
For radiotherapy procedures andfor prolonged interventional radiology where deterministic effects may occur, doses to the most heavily irradiated tissues outside the treatment(target) volume should also be estimated, since effective dose is an inappropriate quantity for assessing the risk of deterministic effects. .
There will therefore be no deterministic effect and the risk of a stochastic effect is quite low.
The manifestation of such biological effects occurs in two different manners: the deterministic effect, caused by high doses of radiations in a short time span, and the stochastic effect caused by low radiation doses received over a long time span.
One of them is the deterministic effect, caused by the high radiation dose that leads the cell to a partial or total loss of its biological function, i.e., cellular death.
The deterministic effect, caused by high doses of radiations in a short time span, and the stochastic effect caused by low radiation doses received over a long time span.
Many studies have demonstrated that several procedures, due to their complexity andlong fluoroscopy times, result in doses above the deterministic effect threshold on some skin areas, causing skin injuries.