Explore the vast range of titles available.

The X-ray tube generates diagnostic X-rays, and these rays can penetrate the human body and to different dimensions depending on the energy of the rays. These rays meet absorption and scattering inside the body, and whatever comes out of them is used for radiological examination purposes. Radiation exposure accompanies some of the potential risks, so it requires knowing the amount of radiation dose for the total exposed (man. Sv), as well as the equivalent effective dose for the organ or tissue in the body, and multiplied by the value determined by the risk factor, thus determining the amount of radiation risk or the rate of infection Radiative damage. The surface entry dose values measured by the German-born Dosimax mobile device are closer to the reference values, because the sensitive size of this meter is a material equivalent to living tissue, which is exposed to X-rays, so the reading value of the dose in the air is not the same as in the case of the ionization chamber (Unfors) is Swedish in origin, but rather the dose of live tissue which is an approach to the dose of patients. The amount of fluctuation in the measuring voltages of the device (C) is 11.3% which is higher than the specified values, and also the standard deviation in the measurement is more than 5%, that is, the device does not meet the quality assurance specifications (QA), while the two devices (F, E) are The volatility value is 3.89% and 4.6%, respectively, which is less than the limits set for this fluctuation of 10%, and the standard deviation values are less than 5%.

Breast cancer threatens a large proportion of the world's women to die annually and does not know the exact causes of this disease. Among these causes is an increase in the surface radiation dose absorbed by the breast during the examination. The research included estimating the ESDpp surface admission dose in the presence of the patient as well as measuring the ESDpa surface entry dose by the absence of the patient and the same previous conditions of voltage and exposure (mAs), background scattering factor for the rays, and calculating the glandular dose rate (AGD) after finding the value of the conversion factor appropriate to the test conditions Given in the standard tables (Ec. 1996a), quality assurance measurements. The paper was done using (Dosimax) and the ionization room (Unfors). The study was conducted in Baghdad Teaching Hospital and Alzafaranya Hospital using two advanced Giotto devices, and it included a number of patients (20 patients) by (10 patients) in each hospital and used compressed breast thickness (CBT) of 60 cm, 70 cm respectively in each of the two sites. The study showed that the maximum values of the ESDpp and ESDpa surface admission dose measured using the (Dosimax) device and the ionization chamber, respectively, do not exceed its value (21mGy). The mean glandular dose rate AGD, the maximum values are (4.1mGy).

There were significant correlation between breathing effects in chest x-ray examination and rejected film. While the techniques and skills employed contribute to about 50% nearly equally of the rejected films. The study samples included (300) patients divided males and females. The mean age of subjects was (35±10years), their mean height was (170±5 cm) and the mean weight was (70±5Kgm).

We looked into the restorative records of patients with Graves’ hyperthyroidism who were treated with iodine-131 between 1996 and 2002. Of the 135 patients, satisfactory data was gotten on the comes about of at slightest 24-month follow-up in 70 of them. Iodine-131 was given in a single measurements at a rate (200 microcuries/g of organ weight redressed to 100% iodine take-up after 24 hours). Methimazole treatment was suspended a week some time recently the organization of iodine-131. Treatment was considered fruitful with either or hypothyroidism. In follow-up examinations conducted after 12 months of application of the treatment, 81.2% of treatment victory rates were found, whereas in examinations conducted after 24 months, the rate come to 88.3%. This near the rates shown in the various sources.

In this research, entrance surface doses of patients which are resulted from a classical radiograph in most widespread tests (Chest, skull, abdomen, limbs, …) have been measured with selected instruments in (Specialized surgeries hospital) and one of the private clinic in Baghdad, the instruments are of various origins and different make date. A group of patients (10 patients) for each test and according the average of the resulted doses. Comparison of the patient’s doses, in this research, has been close with the reliable International standards and it has been found that radiological doses are bigger than reference doses ranging (132–1.79) in most of the appliance and the range doses to one whenever the instrument is new and the radiographer has good experience, this increase relates to several functions discussed in the research in detail For the importance of the quality assurance of x-ray instruments, three tests have been performed by three of the instruments only, and these tests are : Beam Alignment test : The Beam Alignment was measured and the x-ray radiograph was found symmetrical round the two axes of the instruments (A, B) but it is about 3 ° away from the vertical axis of the instrument (C). Optical and Radiation Field Congruence Test: The light field coincides with the radiative field in a and b and their mismatch in c. Focal Spot Size Test: The radiation focus area was measured by the star tool and what appeared is that the focus of the x-ray instrument (C) is smaller than the international standards on the contrary of the focus area of the x-ray instrument (E) which is identical with the international standards. From these results reached is that the instruments (A, B) have passed quality assurance tests and they are suitable for work in the present, but the instrument (C) has not passed most of the quality assurance tests, so this instrument should not be used for medical tests This in research is considered the first one for these instruments to evaluate their doses or measure a quality assurance.

The comes about of optical and photoluminescence properties of anodic alumina shaped within the acidic electrolyte and subjected to high-temperature warm treatment are depicted in article. It was found that the photoluminescence properties of anodic alumina decided by the oxygen opportunities with diverse values of the charge states and pollutions within the frame of corrosive buildups. As a premise of limit finders in terms of the mechanical quality the substrates shaped within the oxalic electrolyte and altered by warm treatment at 800 °C are preferred. Variations of plans dilatometric microrelays sensors of temperature based on anodic alumina are advertised. For different ranges of temperatures and working conditions ideal plans are chosen.

The comes about of the total body scintigraphy filter with iodine-131 and the comes about of thyroid globulin titration were surveyed in 90 patients with separated thyroid cancer and with their follow-up after treatment. Amid the follow-up, backslides were watched in 12 cases, 8 cases (3 cases: ordinary thyroid globulin, 5 cases: tall thyroid gobolin) analyzed by scintigraphy filter and 5 cases with tall thyroid globulin level and the scintigraphy scan negative and backslide was analyzed with the assistance of radiography or ultrasound. Of the 24 cases who gotten sparkle filters demonstrating doubt of repeat, 6 cases were repetitive, whereas as it were 2 of the 63 routinely performed cases were found. It was watched that 10 of the 12 patients who had a backslide were from the tall hazard gather. When considering the typical upper constrain for thyroglobulin 10ng/ml, 3 untrue negative cases were found among patients with backslides, and the number diminished to 1 on the off chance that the upper restrain was considered 5ng/ml. In.

Dark matter, which is over six times more elusive than regular ordinary matter, may be a significant component of the cosmos. We measure the effects of its mass, but the telescopes are unable to catch it. It has the tendency to emit no radiation and to interact only through the action of gravity. This article's main goal is to attempt to define dull matter. Based on our best guess, it is made up of magnetically charged neutrinos and actual attractive monopoles. However, doing so necessitates a significant conceptual leap, as Maxwell's principles must be changed and the electric charge is transformed into an attractive charge. Maxwell's rules would be \"reversed\" in a way that would produce an appealing charge that would replace the electric charge. The unusual form of the Dirac condition, which forced on standard matter that the molecule carries an electric charge and complies with the essential characteristics of the electron, would force within dim matter that the \"dark\" molecule complies with the majority of a neutrino's properties associated with an attractive charge. The article's main goal is to make it seem that dark gaps, especially dynamic supermassive dark gaps, are what determine boring matter. This needs a brief conceptual leap: the dark gap's skyline has a high temperature and a heavy concentration of attractive regions, which leads to a stage move (or broken symmetry) as the matter crosses the skyline. Maxwell's laws may be inverted as a result: the electric charge is replaced with an attractive charge, and the electric current becomes a branch of the attractive current. A third significant conceptual leap is as follows: dull matter would be created outside the dark gap when sterile attractive neutrinos created inside the dark gap crossed dull matter

Estimation of belowground carbon stocks in tropical wetland forests requires funding for laboratory analyses and suitable facilities, which are often lacking in developing nations where most tropical wetlands are found. It is therefore beneficial to develop simple analytical tools to assist belowground carbon estimation where financial and technical limitations are common. Here we use published and original data to describe soil carbon density (kgC m−3; Cd) as a function of bulk density (gC cm−3; Bd), which can be used to rapidly estimate belowground carbon storage using Bd measurements only. Predicted carbon densities and stocks are compared with those obtained from direct carbon analysis for ten peat swamp forest stands in three national parks of Indonesia. Analysis of soil carbon density and bulk density from the literature indicated a strong linear relationship (Cd = Bd × 495.14 + 5.41, R2 = 0.93, n = 151) for soils with organic C content > 40%. As organic C content decreases, the relationship between Cd and Bd becomes less predictable as soil texture becomes an important determinant of Cd. The equation predicted belowground C stocks to within 0.92% to 9.57% of observed values. Average bulk density of collected peat samples was 0.127 g cm−3, which is in the upper range of previous reports for Southeast Asian peatlands. When original data were included, the revised equation Cd = Bd × 468.76 + 5.82, with R2 = 0.95 and n = 712, was slightly below the lower 95% confidence interval of the original equation, and tended to decrease Cd estimates. We recommend this last equation for a rapid estimation of soil C stocks for well-developed peat soils where C content > 40%.