In this chapter, there is insufficient space to exhaustively review the research which has been carried out on internal radionuclide effects. I hope only to highlight evidence which shows that internal radionuclides cannot be assessed by the current radiation risk model, and to suggest some research directions that may enable a new model to be developed, one which more accurately quantifies the...

Cancer risk models and their relationship to ionizing radiation are discussed. There are many model assumptions and risk factors that have a large quantitative impact on the cancer risk estimates. Other health end points such as mental retardation may be an even more serious risk than cancer for those with in utero exposures.

today, nuclear medicine has rapidly been developed so that in some cases, plays a unique role in diagnosis but unfortunalty in spite of diagnostic and therapeutic advantages, the term “nuclear” can induce worries in patients and society. in this article, base on new documents, we intend to show that this worries has no scientific basis. to produce a realistic view, regarding to radiation protec...

Occupational radiation exposure from the space environment may increase cancer morbidity or mortality risk in astronauts. This risk may be influenced by other space fl ight factors including microgravity and e nvironmental contaminants. A Mars mission will not be fe asible unless improved shielding is developed or transit time is decreased. – Human Research Program Requirements Document, HRP-47...

A(t) = Activity at Time t Bq = Becquerel Ci = Curie CLP = Contract Laboratory Program D = Absorbed Dose DCF = Dose Conversion Factor Per Unit Intake H = Effective Dose Equivalent E H = Dose Equivalent Averaged Over Tissue or T Organ T H = Committed Effective Dose Equivalent Per E,50 Unit Intake H = Committed Dose Equivalent Averaged Over T,50 Tissue T LET = Linear Energy Transfer LLD = Lower Li...

adiation can harm cells even if they don't take a direct hit, according to a new study. Injured cells apparently pass on damage to neighboring cells through gap junctions. The report has raised a ruckus because it suggests that current safety standards may underestimate the hazards from low-level radiation exposure Although some scientists suspected that radiation damage might spread from cell ...

background: to investigate the expression of tnf-α, il-6, il-10 in the plasma of patients with lung cancer who received radiation therapy (rt), and to analyze the correlation between these cytokines and radiation pneumonitis (rp). materials and methods: patients with lung cancer who received 3d-crt in our hospital were prospectively evaluated. circulating cytokine levels were measured with elis...