By Faiz M. Khan PhD, John P. Gibbons PhD
In getting ready this new 5th variation, Dr. Kahn and new co-author Dr. John Gibbons made chapter-by-chapter revisions within the mild of the most recent advancements within the box, including new discussions, a brand new bankruptcy, and new colour illustrations all through. Now much more detailed and suitable, this version is perfect as a reference booklet for practitioners, a textbook for college students, and a continuing better half for these getting ready for his or her board exams.
- Stay on most sensible of the most recent advances within the box with new sections and/or discussions of picture Guided Radiation remedy (IGRT), Volumetric Modulated Arc remedy (VMAT), and the Failure Mode occasion research (FMEA) method of caliber assurance.
- Deepen your wisdom of Stereotactic physique Radiotherapy (SBRT) via a totally new bankruptcy that covers SBRT in larger detail.
- Expand your visible realizing with new complete colour illustrations that replicate present perform and depict new procedures.
- Access the authoritative info you wish quickly throughout the new spouse web site which positive aspects absolutely searchable textual content and a picture financial institution for better comfort in learning and teaching.
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Extra info for Khan's the physics of radiation therapy
The energy Q is shared between the emitted particles (including g rays if emitted by the daughter nucleus) and the recoil nucleus. The kinetic energy possessed by the recoil nucleus is negligible because of its much greater mass compared with the emitted particles. Thus practically the entire disintegration energy is carried by the emitted particles. If there were only one kind of particle involved, all the particles emitted in such a disintegration would have the same energy equal to Q, thus yielding a sharp-line spectrum.
PROTON BOMBARDMENT The most common proton reaction consists of a proton being captured by the nucleus with the emission of a g ray. The reaction is known as p,g. Examples are 7 Li(p, g)8Be and 12C(p,g)13N Other possible reactions produced by proton bombardment are of the type p,n; p,d; and p,a. The symbol d stands for the deuteron (21H). D. DEUTERON BOMBARDMENT The deuteron particle is a combination of a proton and a neutron (21H). This combination appears to break down in most deuteron bombardments with the result that the compound nucleus emits either a neutron or a proton.
As a result, the smooth, direct current (DC) voltage is converted into a highfrequency (5 to 100 kHz) alternating current (AC) voltage. A step-up transformer converts this high-frequency low-voltage AC into a high-voltage AC which is then rectified and smoothed to provide a nearly constant high-voltage potential (with a ripple of less than 2%) to the x-ray tube. The principal advantages of a high-frequency generator are (a) reduced weight and size, (b) low voltage ripple, (c) greatest achievable efficiency of x-ray production, (d) maximum x-ray output per mAs, and (e) shorter exposure times.
Khan's the physics of radiation therapy by Faiz M. Khan PhD, John P. Gibbons PhD