Absorbed Radiation Dose in Mammography
Radiation dose from mammographic techniques made up our minds as a perform of surface exposure, beam quality, and depth. Relative exposure vs. depth was measured in tissue-substitute materials by thermoluminescent measurement. The f-factors were calculated from elemental compositions of extirpation specimens. Dose at depth depends on beam quality moreover as exposure and tissue composition. Analysis of information from the ACS/NCI Screening Centers shows current average midbreast doses to be twenty five times lower (film/screen) and three times lower (Xerox) than the two rads antecedently calculable. Quantitative risk indicators aside from midbreast dose also are mentioned. [1]
Radiation Dose–Volume Effects in the Lung
The three-dimensional dose, volume, and outcome knowledge for respiratory organ are reviewed thoroughly. the speed of symptomatic inflammation is said to several dosimetric parameters, and there aren’t any evident threshold “tolerance dose–volume” levels. There are sturdy volume and fractionation effects. [2]
Estimated Radiation Dose Associated With Cardiac CT Angiography
Context internal organ computerized axial tomography (CT) X-ray photography (CCTA) has emerged as a helpful diagnostic imaging modality within the assessment of arterial blood vessel illness. However, the potential risks thanks to exposure to radiation related to CCTA have raised considerations.
Objectives To estimate the radiation dose of CCTA in routine clinical follow still because the association of presently on the market ways with dose reduction and to spot the freelance factors contributive to radiation dose.
Design, Setting, and Patients A cross-sectional, international, multicenter, empirical study (50 study sites: twenty one university hospitals and twenty nine community hospitals) of calculable radiation dose in 1965 patients undergoing CCTA between Feb and December 2007. regression toward the mean analysis was accustomed determine freelance predictors related to dose. [3]
Feasibility study of using one-tenth mSv radiation dose in young children chest CT with 80 kVp and model-based iterative reconstruction
CT has become a routine imaging modality supported its wonderful ability of displaying respiratory organ structures and diseases. But, a way to scale back radiation dose of routine CT examination could be a concern for radiologists. Our study aimed to guage the practicableness of mistreatment 80kVp and a model-based repetitive reconstruction (MBIR) algorithmic program to realize common fraction mSv dose chest CT in infants and young kids. xxxii cases (study cluster, average age one.71 ± 1.01 years) underwent non-contrast chest CT examination at low dose with 80 kV, 4mAs and was reconstructed with MBIR (LD-MBIR) and therefore the normal adaptative applied mathematics repetitive reconstruction (ASIR) algorithmic program (LD-ASIR); another cluster (control group) of thirty two kids underwent routine-dose chest CT with 100 kV and was reconstructed with ASIR solely (RD-ASIR). [4]
Monitoring and Evaluation of Radiation Dose Level at Institute of Nuclear Medicine and Allied Sciences, Khulna
Every kind of radiation is harmful for the activity employees, patients and additionally for the setting. Among of those, radiation is a lot of mischievous. thus it’s essential to observe the radiation level to confirm the health and safety of the activity employees, general public and additionally to shield the setting from the harmful impact of radiation. In medical sector, radiation is employed for designation and treating numerous diseases. For this purpose, a radiation survey has been performed throughout a amount of eight months with a read to establishing the close radiation level within the space of Institute of medical specialty & Allied sciences (INMAS) at Khulna Medical school Hospital, Khulna. [5]
Reference
[1] Richard Hammerstein, G., Miller, D.W., White, D.R., Ellen Masterson, M., Woodard, H.Q. and Laughlin, J.S., 1979. Absorbed radiation dose in mammography. radiology, 130(2), (Web Link)
[2] Marks, L.B., Bentzen, S.M., Deasy, J.O., Bradley, J.D., Vogelius, I.S., El Naqa, I., Hubbs, J.L., Lebesque, J.V., Timmerman, R.D., Martel, M.K. and Jackson, A., 2010. Radiation dose–volume effects in the lung. International Journal of Radiation Oncology* Biology* Physics, 76(3), (Web Link)
[3] Hausleiter, J., Meyer, T., Hermann, F., Hadamitzky, M., Krebs, M., Gerber, T.C., McCollough, C., Martinoff, S., Kastrati, A., Schömig, A. and Achenbach, S., 2009. Estimated radiation dose associated with cardiac CT angiography. Jama, 301(5), (Web Link)
[4] Feasibility study of using one-tenth mSv radiation dose in young children chest CT with 80 kVp and model-based iterative reconstruction
Jihang Sun, Qifeng Zhang, Di Hu, Yun Shen, Haiming Yang, Chenghao Chen, Zuofu Zhou & Yun Peng
Scientific Reports volume 9, Article number: 12481 (2019) (Web Link)
[5] Islam, M. R., Parvez, M. S., Hasan, M. R., Khan, H. R. and Paul, A. K. (2017) “Monitoring and Evaluation of Radiation Dose Level at Institute of Nuclear Medicine and Allied Sciences, Khulna”, Journal of Advances in Medicine and Medical Research, 19(9), (Web Link)