By Jerrold T. Bushberg, J. Anthony Seibert, Edwin M. Leidholdt Jr., John M. Boone
The uncomplicated technology very important to nuclear imaging, together with the character and creation of radioactivity, inner dosimetry and radiation detection and size, are awarded basically and concisely. present recommendations within the fields of radiation biology and radiation defense suitable to scientific imaging, and a couple of worthy appendices whole this finished textbook. The textual content is stronger by way of a variety of complete colour charts, tables, pictures and tremendous illustrations that toughen vital recommendations. The publication is perfect for scientific imaging pros, and teachers and scholars in scientific physics and biomedical engineering. Radiology citizens will locate this article in particular valuable in bolstering their figuring out of imaging physics and comparable themes ahead of board exams.
--NEW Companion web site with totally searchable textual content and images
--Basic line drawings aid to provide an explanation for concepts
--Comprehensive assurance of diagnostic imaging modalities
--Superb writing kind of the writer workforce is helping make a tricky topic approachable and engaging
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Extra resources for The Essential Physics of Medical Imaging
In x-ray transmission imaging, these photons are much more likely to be detected by the image receptor. In addition, for a given scattering angle, the fraction of energy transferred to the scattered photon decreases with increasing incident photon energy. Thus, for higher energy incident photons, the majority of the energy is transferred to the scattered electron. For example, for a 60-degree scattering angle, the scattered photon energy (Esc) is 90% of the incident photon energy (Eo) at 100 keV but only 17% at 5 MeV.
Due to the strong influence of the particle’s mass, bremsstrahlung production by heavier charged particles such as protons and alpha particles will be less than one millionth of that produced by electrons. The energy of a bremsstrahlung x-ray photon can be any value up to and including the entire kinetic energy of the deflected electron. Thus, when many electrons undergo bremsstrahlung interactions, the result is a continuous spectrum of x-ray energies. This radiative energy loss is responsible for the majority of the x-rays produced by x-ray tubes and is discussed in greater detail in Chapter 6.
From Bushberg JT. The AAPM/RSNA physics tutorial for residents. X-ray interactions. ) 80 70 60 140 keV 50 80 keV 40 20 keV 30 20 10 0 0 30 60 90 120 150 Scatter angle (degrees) 180 Chapter 3 • Interaction of Radiation with Matter 41 When Compton scattering occurs at the lower x-ray energies used in diagnostic imaging (15 to 150 keV), the majority of the incident photon energy is transferred to the scattered photon. For example, following the Compton interaction of an 80-keV photon, the minimum energy of the scattered photon is 61 keV.