Fig 2 - uploaded by Hiroaki Hayashi
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Klein-Nishina formula. In physics textbooks, the generation of scattered X-ray is explained by an equation, and a two-dimensional plot.
Source publication
[Aims and objectives]
It is important to visualize scattered X-rays for the education. In a physics textbook, the Klein-Nishina formula is introduced, and everyone has studied the 2D graph of scattered X-ray distribution. However, it is difficult for the medical stuffs to understand the distribution. In this poster, we propose a new experimental ap...
Contexts in source publication
Context 1
... is introduced as presented in Fig.2. Here, ds/dW is a differential cross-section, r 0 is a classical electron radius, a is hn/mc 2 , and # is an angle between an incident and scattered directions. ...
Context 2
... is a differential cross-section, r 0 is a classical electron radius, a is hn/mc 2 , and # is an angle between an incident and scattered directions. We can see that the differential cross-section (provability) is determined as functions of incident X-ray energy hn and an angle q. In general, provability is plotted by a two-dimensional graph (see Fig.2, Fig.3) in which the provability is normalized by a scattering angle of 0 degree. This two-dimensional graph is common and easy to understand for engineering students, but it seems that for students taking medical course it is ...
Citations
... During the assisting procedure, the assistants are exposed by scattered X-rays, which are generated by the patient via the Compton scattering phenomenon. For X-ray diagnosis using low voltage such as 40-60 kV, it is widely known that the energy of the scattered X-rays is similar to that of incident X-rays and intensity of the scattered X-rays in the back-scattering direction was higher than that of the side [1,2]. Based on the scientific consideration of reducing the exposure dose for assistants, the positioning procedure represented in Fig. 1 is not appropriate; the assistants cover the patient from the upper side. ...
... In our experiment as shown in Fig. 7, we set the detector perpendicular to the beam axis to reduce the background component. We do this because the intensity of Compton scattered X-rays at 90 degree is relatively low according to the Klein-Nishina formula [7,8]. Here, we propose a new methodology to remove the Compton-scattering X-rays in the measured spectrum. ...
