Investigation of Backscattered Dose in a Computerized Tomography (CT) Facility during Abdominal CT Scan by Considering Clinical Measurements and Application of Monte Carlo Method

Tekın, H.O.; Öztürk, Özlem; Manıcı, Tuğba; Ekmekci, Ceren

doi:10.17265/2328-7136/2016.03.004

Cited by 6 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(16). Various simulation investigations on medical applications and for other aims by using MCNPX Monte Carlo code are found in literature (17)(18)(19)(20)(21). Apart from the general approaches to medical applications of MCNPX code, MCNPX is also significantly useful and effective tool for mammography investigations (22).…”

Section: Simulation Geometry Setup and Validationmentioning

confidence: 99%

Assessment of MCNPX Monte Carlo Code for Absorbed Dose Calculations in Mammogarphy Examination

Tekın¹,

Mesbahi²,

Singh³

et al. 2017

AKU-J. Sci. Eng.

View full text Add to dashboard Cite

Introduction: This study aimed to investigate capabities of MCNPX monte carlo code for calculations of average absorbed dose in a breast phantom during mammography examination. Also, the effect of tube voltage and breast thickness on absorbed dose was determined by using Monte carlo method. Obtained HVL values were found to be comparable with experimental results and available Monte Carlo results. Thus, validated simulation setup has been used for investigation of average absorbed dose in a %50-%50 grandular-adipose breast phantom. Results: Our calculated results was consistent with the previous studies and our MC model was validated. The results showed that changing tube voltage from 26 to 32 kV leads to about 4 times increase in breast dose. While increasing breast thick ness from 2 to 5 cm results in 1.6 times higer dose to breast. Conclusion: It can concluded that the breast recieved dose depends strongly beam quality and breast thickness. Our modeling using MCNPX can be used future dosimteric studies concering breast dose investigations in mamograpgy examinations. Mamografi Çekimlerinde Absorbe Doz Hesaplamaları için MCNPX Monte Carlo Kodunun Değerlendirilmesi

show abstract

Section: Simulation Geometry Setup and Validationmentioning

confidence: 99%

Assessment of MCNPX Monte Carlo Code for Absorbed Dose Calculations in Mammogarphy Examination

Tekın¹,

Mesbahi²,

Singh³

et al. 2017

AKU-J. Sci. Eng.

View full text Add to dashboard Cite

show abstract

Adult Patient Radiation Doses with Multislice Computed Tomography Exam: MSCT Standard Protocols

et al. 2017

View full text Add to dashboard Cite

Radiation is energy, and it is widely used in a variety of fields, especially in industry and medical science. In hospital, ionizing radiation like X-ray is an extensive exam that has been used to help physicians to have a view into the body, without having to make a medical application. Computed tomography scan uses ionizing radiation, and it is a nearly perfect diagnostic unit that allows the physician to see the picture of the human body. Computed tomography scan technology has progressed over the years, and it is an increasingly powerful and effective unit in the diagnostic radiology. Exposure to ionizing radiation is known to increase the risk of cancer. The aim of this study was to assess the radiation exposure received during computed tomography in a sample representative of the current state of practice in adult patients.

show abstract

Quantitative Characteristic X-Ray Analysis for Different Compound Samples by Using Monte Carlo Method

et al. 2017

View full text Add to dashboard Cite

X-ray spectrometry is an elemental analysis technique with broad application in science and industry. It is based on the principle that individual atoms, when excited by an external energy source emit X-ray photons of a characteristic energy or wavelength. Here we obtained the characteristic X-ray peaks of different brass compounds and compared the intensity of characteristic peaks by changing with Zn rate. In this study we modelled different brass samples by using Monte Carlo method and changed the zinc rate in brass samples for each compound. We obtained the characteristic X-ray peaks of different compounds and compared the intensity of characteristic peaks by changing with Zn rate. We achieved a good agreement between peak intensity and corresponding element rate in compound. Also we obtained that characteristic peak rate increases by corresponding element rate in compound. This study shows that Monte Carlo method is very effective method to simulate material features due to their characteristic peaks and their intensities. DOI: 10.12693/APhysPolA.132.439 PACS/topics: Monte Carlo, characteristic X-ray, brass 1. Introduction X-rays occur when the fast electrons interact with matter. During this process, kinetic energy of electrons is basically converted into heat energy but some is also converted into electromagnetic energy in the form of photons. X-ray photons are a form of electromagnetic radiation produced after the ejection of an inner orbital electron and following transition of atomic orbital electrons from states of high to low energy. When a monochromatic beam of X-ray photons falls onto a specimen some basic phenomena may result in some effects such as absorption, scatter and fluorescence. These three phenomena forms are the basis of three important X-ray methods: the absorption technique is the basis of radiographic analysis, the scattering effect is the basis of X-ray diffraction, and the fluorescence effect is the basis of XRF spectrometry. When high energy photons (X-rays or gammarays) are absorbed by atoms, inner shell electrons are ejected from the atom, becoming photoelectrons [1]. This leaves the atom in an excited state, with a vacancy in the inner shell. Outer shell electrons then fall into the vacancy, emitting photons with energy equal to the energy difference between the two states. Since each element has a unique set of energy levels, each element emits a pattern of X-rays characteristic of the element, termed characteristic X-rays. Figure 1 shows the generation of the characteristic X-ray from atomic orbit. The intensity of the X-rays increases with the concentration of the corresponding element.

show abstract

Investigation of Backscattered Dose in a Computerized Tomography (CT) Facility during Abdominal CT Scan by Considering Clinical Measurements and Application of Monte Carlo Method

Cited by 6 publications

References 3 publications

Assessment of MCNPX Monte Carlo Code for Absorbed Dose Calculations in Mammogarphy Examination

Assessment of MCNPX Monte Carlo Code for Absorbed Dose Calculations in Mammogarphy Examination

Adult Patient Radiation Doses with Multislice Computed Tomography Exam: MSCT Standard Protocols

Quantitative Characteristic X-Ray Analysis for Different Compound Samples by Using Monte Carlo Method

Contact Info

Product

Resources

About