Considering Existing Factors That May Cause Radiation Hormesis at <100 mSv and Obey the Linear No-Threshold Theory at ≥100 mSv

The linear no-threshold (LNT) theory describes the linear relationship between a radiation dose and its effects. However, whether the linear relationship is maintained at low radiation doses has yet to be determined. Many previous studies support the radiation hormesis theory, which states that radiation has beneficial effects on health. In this viewpoint, we propose a mathematical function fitted to a model consistent with both the LNT at ≥100 mSv and radiation hormesis theories at <100 mSv, and the model requires a factor whose amount or activity takes a mountain-like shape versus the radiation dose and have one maximum value at 40.9 mSv. We searched a wide range of factors with these features based on searches on PubMed, and then evaluated whether these factors were suitable candidates consistent with both the LNT and radiation hormesis theories. Our consideration indicated that these factors did not completely follow the equation suggested at this time. Of course, other theories do not deny that these factors are involved in hormesis. However, based on our theory, still unknown factors may be involved in radiation hormesis, and then such unknown factors which are activated at <100 mSv should be searched.

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The prospective mathematical idea satisfying both radiation hormesis under low radiation doses and linear non-threshold theory under high radiation doses

Genes and Environment ◽

10.1186/s41021-020-0145-4 ◽

2020 ◽

Vol 42 (1) ◽

Cited By ~ 1

Author(s):

Katsuhito Kino

Keyword(s):

Mathematical Idea ◽

Radiation Doses ◽

High Radiation ◽

Radiation Hormesis ◽

Threshold Theory ◽

Low Radiation Doses

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Mechanistic Insights Into Why Radiation Dose Matters? It Matters Most Because of Adaptive Responses at Low Radiation Doses

Journal of Nuclear Medicine ◽

10.2967/jnumed.118.217984 ◽

2018 ◽

Vol 59 (11) ◽

pp. 1778-1779 ◽

Cited By ~ 1

Author(s):

Charles W. Pennington

Keyword(s):

Radiation Dose ◽

Radiation Doses ◽

Adaptive Responses ◽

Low Radiation Doses

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Evaluation of gamma radiation response of electrolyte, MKP and MKT capacitors in various frequencies

Radiochimica Acta ◽

10.1515/ract-2016-2692 ◽

2017 ◽

Vol 105 (7) ◽

Cited By ~ 1

Author(s):

Shahryar Malekie ◽

Behrooz Salehpour

Keyword(s):

Radiation Dose ◽

Gamma Radiation ◽

Gamma Irradiation ◽

Experimental Work ◽

Radiation Resistance ◽

Radiation Response ◽

Radiation Doses ◽

Electrolytic Capacitors ◽

Linear Decrease ◽

Wide Range

AbstractIn this experimental work, the effect of gamma irradiation on the capacitance and impedance of some commercial capacitors namely electrolytic, MKP, and MKT capacitors in different radiation doses up to 120 kGy and a wide range of frequencies between 42 Hz and 5 MHz were studied. Results showed that the capacitances of the electrolytic capacitors exhibited a linear decrease by increasing the radiation dose and frequencies, which can be used for high dosimetry purposes, but non-ceramic capacitors as MKP and MKT showed much higher radiation resistance, particularly for the frequencies less than ~1 MHz.

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Condition of the cerebral arterial system in the patients with low radiation doses: duplex scans investigation V.G. Leliuk, A.K. Guskova, S.E. Leliuk. SRC, Institute of Biophysics, Moscow, Russia

European Journal of Ultrasound ◽

10.1016/s0929-8266(97)90046-x ◽

1997 ◽

Vol 5 ◽

pp. 18-19

Keyword(s):

Arterial System ◽

Radiation Doses ◽

Low Radiation Doses

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The Employment of 197Hg EDTA in Kidney Scanning

Nuklearmedizin ◽

10.1055/s-0037-1621275 ◽

1965 ◽

Vol 05 (01) ◽

pp. 56-67

Author(s):

I. Pál ◽

J. Földes ◽

I. Krasznai

Keyword(s):

Radiation Dose ◽

Renal Cortex ◽

Radiation Doses ◽

Intravenous Pyelography ◽

Edta Complex

SummaryThe authors investigated the use of 197Hg EDTA complex for kidney scanning. They describe the physical, biological and toxicological properties of the compound; its distribution within the organism, its excretion with urine and faeces and its uptake by the kidneys. The authors have established that the renal cortex selectively secretes the material which makes it suitable for kidney scanning. Some scintigrams of both normal and pathologic kidneys are presented.Finally a detailed discussion of the dosimetry is included. The radiation doses due to 197Hg EDTA are compared with those due to 203Hg-neohydrin and to intravenous pyelography. This comparison shows clearly that the use of 197Hg EDTA considerably decreases the radiation dose to the patient.

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Effect of low radiation doses on microbe population in space stations

Kosmìčna nauka ì tehnologìâ ◽

10.15407/knit2002.05.058 ◽

2002 ◽

Vol 8 (5-6) ◽

pp. 58-61

Author(s):

V.V. Tsetlin ◽

◽

E.A. Deshevaya ◽

N.D. Novikova ◽

N.A. Polikarpov ◽

...

Keyword(s):

Radiation Doses ◽

Low Radiation Doses ◽

Microbe Population

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Radiation Minimisation and Outcome Maximisation in Cardiac Computed Tomograpy

European Cardiology Review ◽

10.15420/ecr.2010.6.1.15 ◽

2010 ◽

Vol 6 (1) ◽

pp. 15

Author(s):

James P Earls ◽

Jonathon A Leipsic ◽

◽

Keyword(s):

Radiation Dose ◽

Dose Reduction ◽

New Technologies ◽

Cardiac Computed Tomography ◽

Substantial Reduction ◽

Radiation Doses ◽

Tube Current ◽

Prospective Triggering ◽

Effective Radiation ◽

Selection Of

Recent reports have raised general awareness that cardiac computed tomography (CT) has the potential for relatively high effective radiation doses. While the actual amount of risk this poses to the patient is controversial, the increasing concern has led to a great deal of research on new CT techniques capable of imaging the heart at substantially lower radiation doses than was available only a few years ago. Methods of dose reduction include optimised selection of user-defined parameters, such as tube current and voltage, as well as use of new technologies, such as prospective triggering and iterative reconstruction. These techniques have each been shown to lead to substantial reduction in radiation dose without loss of diagnostic accuracy. This article will review the most frequently used and widely available methods for radiation dose reduction in cardiac CT and give practical advice on their use and limitations.

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Transcending Time and Space with Digital Emotional Support

10.31234/osf.io/cehtk ◽

2020 ◽

Cited By ~ 2

Author(s):

Tyler Colasante ◽

Lauren Lin ◽

Kalee DeFrance ◽

Tom Hollenstein

Keyword(s):

Emotional Support ◽

Negative Emotion ◽

Negative Emotions ◽

Good News ◽

Social Avoidance ◽

Time And Space ◽

Beneficial Effects ◽

Digital Devices ◽

Wide Range ◽

Socially Isolated

In the current digital age, emotional support is increasingly received through digital devices. However, virtually all studies assessing the benefits of emotional support have focused on in-person support. Using an experience sampling methodology, we assessed participants’ negative emotions, digital and in-person support for those emotions, and success in regulating them three times per day for 14 days, thus covering a wide range of digital support scenarios (N = 164 participants with 6,530 collective measurement occasions). We also considered whether participants were alone versus with others at the time of their negative emotion and higher versus lower in social avoidance as plausible moderators of when digital support was utilized and effective. We expected more pronounced use and efficacy of digital support when participants were alone and higher in trait social avoidance. However, digital support was used and perceived as effective for regulating negative emotions regardless of these factors and its beneficial effects were on par with those of traditional in-person support. The unique benefits of digital support may not be restricted to socially isolated or socially avoidant users. These findings are timely given the widespread anxiety and isolation under the current COVID-19 pandemic. If transcending time and space with digital emotional support is the new norm, the good news is that it seems to be working.

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