0000005330 00000 n Home. 0000001336 00000 n The Physical and Biological Bases of Radiation Therapy • 1.4 million malignant cancers / yr in the US • Half of them treated with radiotherapy • Radiation therapy uses both physics biology to maximize the differential between tumor control and side effects Gamma-radiation is penetrative in a manner similar to x-rays and has similar physical properties. This chapter discussed the most important physical and radiological quantities and … 0000003256 00000 n 0000006596 00000 n 0000001543 00000 n In fact, a large proportion of the average annual radiation dose received by people results from natural environmental sources. 1 kilogray 2 megarad Radiation doses should be monitored … Radiation PowerPoint Template. Ionizing EM Radiation • EM radiation with wavelengths shorter than 100 nanometers can remove electrons from the outer atomic shells. The magnetic and the electric fields come at 90° to each other and the combined waves move perpendicular to both electric and magnetic oscillating fields occurring the disturbance. .navigation {FONT-SIZE: 11px; COLOR: #FFFFFF; FONT-FAMILY: helvetica, arial;} Polarization and physical phenomena Dichroism and anomalous dispersion I Though the etymology of the word is rather misleading, dichroism is a typical phenomenon of anisotropic media which consists in the fact that the absorption properties of the radiation … 0000001668 00000 n Introduction to radiation, its occurrence, effect on humans and government regulations in Nigeria to ensure the safety of her citizens. gist3”). endstream endobj 83 0 obj 626 endobj 84 0 obj << /Filter /FlateDecode /Length 83 0 R >> stream Radiation is an energy in the form of electro-magnetic waves or particulate matter, traveling in the air.” 3. 0000004534 00000 n trailer << /Size 101 /Info 74 0 R /Root 76 0 R /Prev 331153 /ID[<099c9405723356d897761b9615fa3555><099c9405723356d897761b9615fa3555>] >> startxref 0 %%EOF 76 0 obj << /Type /Catalog /Pages 72 0 R >> endobj 99 0 obj << /S 303 /Filter /FlateDecode /Length 100 0 R >> stream Radiation Safety Part Two – Managing the risks. The energy of a photon is directly proportional to the frequency of the radiation, with a constant of proportionality called Planck’s constant. Over time, the cells die. To understand how radiation works as a treatment, it is helpful to know about the normal life cycle of a cell. The concept of keeping doses as low as reasonably achievable, known as ALARA, would no longer be required for low-level radiation exposures not expected to exceed the dose guidance levels significantly. Radiation is energy in the form of particles or rays given off by unstable atoms. Radiation therapy uses ionizing radiation, which means that the radiation’s energy is sufficient to remove an electron from the outer shell of an atom (more than 124 electron volts). Posted by Unknown at 19:13 7 comments: Email This BlogThis! The idea here is to explain the physical concepts that produce radiation in terms of electrons flowing on a wire. radiation. unit vii powerpoint thermodynamic concepts: conduction, convection and radiation phs 1110- principles of physical science columbia southern university frank j. seay ii Kelvin was the first to coin the word “Thermodynamics”. If there is no professional title in one or more of these professions, is there (ii) Additional responsibilities (e.g. Light transmits spatial and temporal information. Max Karl Ernst Ludwig Planck, ForMemRS (German: [maks ˈplaŋk] (); English: / ˈ p l æ ŋ k /; 23 April 1858 – 4 October 1947) was a German theoretical physicist whose discovery of energy quanta won him the Nobel Prize in Physics in 1918.. Planck made many … Presentation Summary : Radiation Therapy. H�b```�����@��(���1*�� $؎1ru�zd���)˝_i��7X����J*&G���?b��� T��Ѿ��ŵ�����'�{�a�U�����]-���M�����]Q����ɷ�cXv�k���k�X��>����{�X^=�[�b}����갻�[��}�y� ��� �&�F ���FA��2�촴��9��Q��QP���ظ����� ������IɃ/�-˿9@Z��"�\zm��j Quantizing Electrons in the Radiator. Evaluate chemical, and physical properties forEvaluate chemical, and physical properties for changes. li.nav {text-indent: -8px; list-style-type: square; font-family: arial, helvetica; FONT-SIZE: 12px; color: #ffffff;} This property forms the basis of the fields of optics and optical communications and a myriad of related technologies, both mature and emerging. Radiation quantities and units The most important radiation quantities and their units are listed in Table 1.3. Planck's law is a formula for the spectral radiance of an object at a given temperature as a function of frequency (L f) or wavelength (L λ).It has dimensions of power per solid angle per area per frequency or power per solid angle per area per wavelength. E = h c / λ. Ionizing EM Radiation. Free + Easy to edit + Professional + Lots backgrounds. in [19] related to radiation, but can also be seen as an attempt to resuscitate classical deterministic continuum mechanics (as opposed to statistical par-ticle mechanics) from the ‘ultraviolet catastrophe" by fusing it with a new concept of nite precision computation. BASIC RADIATION PHYSICS 7 For photons, E = hn and E 0 = 0; thus using Eq. Number of RTTs and their professional qualifications (degrees, speciali- zations, accreditations or fellowships). The Concept of Temperature (l). When radiation damages the genes of cancer cells, they can’t grow and divide any more. All presentations are compiled by our Tutors and Institutes. A.nav:hover {COLOR: #000000; TEXT-DECORATION: none; background-color: lightyellow} Specific heat and latent heat of fusion and vaporization. The cell cycle goes through 5 phases, one of which is the actual Home. understand the concept of potential temperature and how it relates to stability, buoyancy frequency and temperature lapse rate understand the concept of radiative-convective equilibrium know the components of the Earth radiation balance understand the concepts of optical depth, radiation intensity, irradi-ance, and transmission of radiation The energy (E) is related to the wavelength (λ) in the wave model through Planck’s Constant (h) and the speed of light (c). Global Patterns of Insolation Receipts (h). The term "radiation therapy" most often refers to external beam radiation therapy. Abstract. Cold objects in a warmer room will heat up to room temperature. Stability required for radiation sterilization & product sterilization processes. However UV radiation is largely scattered by earth’s atmosphere and hence not used in field of remote sensing. 2. Electromagnetic radiation, on the other hand, consists of photons that have energy, but no mass or charge. Experiments that scatter x-rays off particles have been used to validate this concept. 0000005309 00000 n The biological effects of deep space radiation (GCR and SPE) are not well characterized, and these uncertainties prevent appropriately precise and valid probabilistic risk assessments. Global Heat Balance: Introduction to Heat Fluxes (k). 0000003948 00000 n ԅ Published on September 19, 2015 April 6, 2020 by Free Powerpoint. google_color_url = "008000"; Each individual wave contributes an energy kT to the radiation in the box. The field, which is very near to the antenna is reactive near field or non-radiative field where the radiation is not pre-dominant. Technological applications based on the manipulations of light include lasers, holography, and fibre-optic telecommunications systems.. Once you have successfully completely the quiz at the end of Part I of this training, register for “ Applied Radiation Safety: Part II. Radiation Mechanism. It considers how the transport of entities such as heat, mass, and momentum is determined by the state of the atmosphere and the corresponding state of the surface involved in the exchange, whether soil, vegetation, the coat of an animal, or the integument of an insect or seed. google_ad_height = 250; Stockholm in November 2011 Claes Johnson the different types of radiation on the human body. Patients may receive radiation 5 days in Radioactive material is any material that emits, by spontaneous nuclear disintegration, corpuscular or electromagnetic emanations. Biological Environment Certain diseases do not occur in some areas because agents or vectors can not exist in that environment due to biological reasons. This Free PowerPoint Template is compatible with All Latest Microsoft PowerPoint Versions and can be also used as Google Slides Themes. An important concept in radiation biology is that the most rapidly dividing cells are the least well differentiated and are the most sensitive to radiation and thus are the most vulnerable to radiation-induced death and injury. H�lSM��0��+戫��r�n[m�J�����@�W��i�߱��t7���|��f&�*�����j����y+������]t�凄����HTut��ѯ��cI�U�Gz];�d������"T�����U/��P�"g� K�a����d���]7,�ќ=���@�=Eቭyw�uZ�Y�^�ÜW�#΂�}3 ���CrL��a˒�ǿ��(ej�L�p;׸0��P4�`���E�f�� �}�" ���L�K *S|U ������Ѧ�ZcZ�>)� 0000005914 00000 n Radiation therapy most often uses X-rays, but protons or other types of energy also can be used. The three major principles to assist with maintaining doses “As Low As Reasonably Achievable” are … (Yuck!) Once you have successfully completely the quiz at the end of Part I of this training, register for “ Applied Radiation Safety: Part II. The region next to it can be termed as radiating near field or Fresnel’s field as the radiation predominates and the angular field distribution, depends on the physical … //-->, body {margin: 0 0 0 0;} Radiation is the transmission or emission of energy in the form of particles or waves through space or through a material medium. 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