Absorbed doses of radiation

The absorbed dose of radiation is the energy deposited in a sample (in particular, the human body) when it is exposed to radiation. The SI unit of absorbed dose is the gray, Gy, which corresponds to an energy deposit of 1 J-kg. The original unit used for reporting dose was the radiation absorbed dose (rad), the amount of... 

Rad a unit for an absorbed dose of radiation equal to 100 ergs of energy absorbed by a gram of matter... 

The band at 1018 cm 1 is due to the presence of occulted oxygen in PE film (thickness, 22-24 pm). The bands at 452 and 456 cm"1 appear only for LDPE (thickness, 22-24 pm) which are attributed to the P (C=C-H). The disappearance of a small band at 888 cm"1 is possibly due to >CH2 out of plane deformation. This may be explained on the basis of evolution of hydrogen gas as a result of the degradation. The intensity of IR absorption bands at 1017, 1113, 1131, 1175, 1241 cm"1 is shown to increase with increasing irradiation dose. The intensity of the bands 1069 cm 1 (C-C stretching), 1287 cm 1 (OH bending), 1377 cm"1 (symmetrical deformation of CH3) (which are initially present in IR spectra of unirradiated films) increase with absorbed dose of radiation, whereas the intensity of the sharp band at 1456 cm"1 is not affected at all. The small band at 965 cm 1 is attributed to C-H out of plane deformation of trans-vinylene groups trans RCH=CHR). 

UV fluence. However, this is incorrect and misleading because the SI unit of the absorbed dose of radiation is gray/J kg (Gy) (MiUs et al., 1993). The unit Gy is related to a specific mass and it was defined for reasons of safeguarding human health in radiology. It is used in radiation protection. 

The two basic quantities in the assessment of radiation levels and effects are the activity of a radioactive material and the radiation dose. The activity of a radioactive material is the number of nuclear disintegrations per unit time, unit becquerel (Bq). One becquerel is one disintegration per second. The term radiation dose can mean several things (e.g. absorbed dose, dose equivalent or effective dose equivalent). The absorbed dose of radiation is the energy imparted per unit mass of the irradiated material. The unit of absorbed dose is joule/kg, for which the special name gray (Gy) is used ... 

Energy deposited in a sample, such as a human body, when exposed to radiation -> Units of the absorbed dose of radiation are ... 

Besides intravenous injection, some radioimmunoconjugate-based drug candidates have also been directly injected into the tumor sites in clinical trials and have reached Phase II and phase III development. TheraGyn (90Y -anti-Mucl) is administered to colon cancer patients by intraperitoneal injection.18 A 131I-anti-tenascin radioimmunoconjugate is injected into a cranial resection cavity of glioma patients.19 Although benefits for the patient were observed in these trials, the absorbed dose of radiation was still below the estimated dose needed to eradicate solid tumors and will need to be increased in future evaluations. 

Mostly natural sources contribute to the ionizing radiation exposure that people undergo aU the time. The received dose of radiation is measured in grays. The absorbed dose of radiation that results in damage done to organisms is measured in sieverts. 

The estimation of radioactive resistance of RubCon was done by studying its compressive strength and modulus of elasticity depending on the absorbed dose of radiation. The source of radiation was the isotope Co60. The maximum absorbed... 

Prior to the introduction of SI units, the unit of absorbed dose of radiation was the rad (also krad and Mrad), and this unit still appears in some compendia, regulatory doomients, and other sources of information. For reference, 100 rad is equivalent to one gray, and 2.5 Mrad is equivalent to 25 kGy,... 

Dose equivalent (H) - The product of the absorbed dose of radiation at a point of interest in tissue and various modifying factors which depend on the type of tissue and radiation. [1]... 

In liver radioembolization, the amount of exposure and absorbed dose of radiation to liver parenchyma is dependent on the treatment approach. 

The intensity of radiation depends on the number of disintegrations as well as on the energy and type of radiation emitted. One common unit for the absorbed dose of radiation is the rad (radiation absorbed dose), which is the amount of radiation that results in the absorption of 1 X 10 J per kilogram of irradiated material. The biological effect of radiation also depends on the part of the body irradiated and the type... 

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