What is Radiology and Radiologic Technology?
... A linear accelerator (LINAC) uses microwave technology to accelerate electrons to incredible speeds in order to collide them into a heavy metal target. This collision produces powerful X-rays. The radiation therapist focuses the x-rays on the patient’s tumor to destroy cancer cells so that normal su ...
... A linear accelerator (LINAC) uses microwave technology to accelerate electrons to incredible speeds in order to collide them into a heavy metal target. This collision produces powerful X-rays. The radiation therapist focuses the x-rays on the patient’s tumor to destroy cancer cells so that normal su ...
CT Angiography (CTA)
... CT imaging is sometimes compared to looking into a loaf of bread by cutting the loaf into thin slices. When the image slices are reassembled by computer software, the result is a very detailed multidimensional view of the body's interior. Refinements in detector technology allow new CT scanners to o ...
... CT imaging is sometimes compared to looking into a loaf of bread by cutting the loaf into thin slices. When the image slices are reassembled by computer software, the result is a very detailed multidimensional view of the body's interior. Refinements in detector technology allow new CT scanners to o ...
WDS_poster_XAFS11 - CARS
... x-rays. The sample, bent crystal analyzer, and detector slits all lie on a circle, with the angle between sample and detector and crystal lattice spacing selecting the accepted energy. LiF(200) and (220) crystals are typically used for hard x-ray energies. Tandem proportional counters (one sealed wi ...
... x-rays. The sample, bent crystal analyzer, and detector slits all lie on a circle, with the angle between sample and detector and crystal lattice spacing selecting the accepted energy. LiF(200) and (220) crystals are typically used for hard x-ray energies. Tandem proportional counters (one sealed wi ...
No Slide Title
... x-rays. The sample, bent crystal analyzer, and detector slits all lie on a circle, with the angle between sample and detector and crystal lattice spacing selecting the accepted energy. LiF(200) and (220) crystals are typically used for hard x-ray energies. Tandem proportional counters (one sealed wi ...
... x-rays. The sample, bent crystal analyzer, and detector slits all lie on a circle, with the angle between sample and detector and crystal lattice spacing selecting the accepted energy. LiF(200) and (220) crystals are typically used for hard x-ray energies. Tandem proportional counters (one sealed wi ...
radiation - Amazon Web Services
... material inside their bodies. Besides radon, the most important internal radioactive element is naturally occurring potassium-40 but uranium and thorium are also present. ...
... material inside their bodies. Besides radon, the most important internal radioactive element is naturally occurring potassium-40 but uranium and thorium are also present. ...
PDF - Oxford Academic - Oxford University Press
... Three kinds of magnetic devices generate SR beams: bending magnets, wigglers and undulators (Fig. 1C). When electrons pass between the dipoles of a bending magnet, a flattened, fan-shaped electromagnetic radiation beam is emitted. Hard X-ray, soft X-ray, ultraviolet and infrared beams can be extract ...
... Three kinds of magnetic devices generate SR beams: bending magnets, wigglers and undulators (Fig. 1C). When electrons pass between the dipoles of a bending magnet, a flattened, fan-shaped electromagnetic radiation beam is emitted. Hard X-ray, soft X-ray, ultraviolet and infrared beams can be extract ...
X-ray phase-contrast CO 2 angiography for sub
... compared to simulated profiles in a range of diameters with 100 nm increments. For each simulated diameter different relative translations of the profiles are tested to find the minimum root-mean-square error. The vessel diameter giving the least such error is considered to be the diameter of the ve ...
... compared to simulated profiles in a range of diameters with 100 nm increments. For each simulated diameter different relative translations of the profiles are tested to find the minimum root-mean-square error. The vessel diameter giving the least such error is considered to be the diameter of the ve ...
Chapter 1
... FIG. 1-11 A magnetic resonance imaging technologist uses electromagnetics, specifically radio waves and magnetism, to create diagnostic sectional images of the body. (Courtesy Philips Medical Systems.) ...
... FIG. 1-11 A magnetic resonance imaging technologist uses electromagnetics, specifically radio waves and magnetism, to create diagnostic sectional images of the body. (Courtesy Philips Medical Systems.) ...
Ch 1 Basic Imaging Principles
... Nuclear medicine imaging reflects the local concentration of a radiotracer within the body. Since this concentration is tied to the physiological behavior of the carrier molecule within the body, nuclear medicine imaging is functional imaging methods. Example radioactive iodine to study thyroid func ...
... Nuclear medicine imaging reflects the local concentration of a radiotracer within the body. Since this concentration is tied to the physiological behavior of the carrier molecule within the body, nuclear medicine imaging is functional imaging methods. Example radioactive iodine to study thyroid func ...
Lecture 1 - Spinal Cord Sep 2013
... Plain Radiographs (x-rays) are usually the first series of images to be ordered by the physician. ...
... Plain Radiographs (x-rays) are usually the first series of images to be ordered by the physician. ...
bidder`s response
... 15 kW Microprocessor controlled X-ray converter generator Rotating anode X-ray tube for the most demanding interventional procedures Slim tank unit with 0.3/0.6 IEC dual focus Integrated beam-filter to reduce the patient skin dose by 40% X-ray tank and housing designed for maximum cooling capacity ( ...
... 15 kW Microprocessor controlled X-ray converter generator Rotating anode X-ray tube for the most demanding interventional procedures Slim tank unit with 0.3/0.6 IEC dual focus Integrated beam-filter to reduce the patient skin dose by 40% X-ray tank and housing designed for maximum cooling capacity ( ...
MEDICAL PHYSICS QUESTIONS FOR MEMBERSHIP
... elements. Describe how the heel effect arises, using the diagram to illustrate. 25. Discuss in detail the two types of x-ray production resulting from an electron beam with a given kinetic energy incident on a tungsten target. Describe their relative contributions to the emitted radiation. 26. Discu ...
... elements. Describe how the heel effect arises, using the diagram to illustrate. 25. Discuss in detail the two types of x-ray production resulting from an electron beam with a given kinetic energy incident on a tungsten target. Describe their relative contributions to the emitted radiation. 26. Discu ...
Nuclear Medicine
... Emission Tomography. This imaging technique is based on the use of β+ emitters (or positron emitters), such as 11C, 13N, and 15O isotopes. These basic biological elements are prepared in a cyclotron, which is a very expensive device. Unfortunately they have short half-lives of 20, 10 and 2 minutes, ...
... Emission Tomography. This imaging technique is based on the use of β+ emitters (or positron emitters), such as 11C, 13N, and 15O isotopes. These basic biological elements are prepared in a cyclotron, which is a very expensive device. Unfortunately they have short half-lives of 20, 10 and 2 minutes, ...
Aquilion ONE / ViSION Edition CT Scanner Realizing 3D Dynamic
... that achieves a shorter scanning time and significant reduction in dose compared with conventional products. This product with its low-dose scanning technology will contribute to the practical realization of new diagnosis and treatment modalities employing four-dimensional (4D) data based on 3D dyna ...
... that achieves a shorter scanning time and significant reduction in dose compared with conventional products. This product with its low-dose scanning technology will contribute to the practical realization of new diagnosis and treatment modalities employing four-dimensional (4D) data based on 3D dyna ...
Radiation protection in the cathlab
... Do not overuse magnification modes: decreasing FOV by factor :2 increases dose rate by factor x4 Adjust parameter settings i.f.o. procedure and patient (adult vs. child; patient weight; ciné mode,…) Prefer pulsed fluoroscopy (with the lowest frame rate possible for acceptable image quality) Use ciné ...
... Do not overuse magnification modes: decreasing FOV by factor :2 increases dose rate by factor x4 Adjust parameter settings i.f.o. procedure and patient (adult vs. child; patient weight; ciné mode,…) Prefer pulsed fluoroscopy (with the lowest frame rate possible for acceptable image quality) Use ciné ...
Enlarged Heart
... Because you must decide where to measure the widths of the heart and chest cavity, your answers depend on how you interpret the x-ray. You may interpret an x-ray differently than one of your classmates, or you may even interpret the same x-ray differently each time you look at it. That’s why interpr ...
... Because you must decide where to measure the widths of the heart and chest cavity, your answers depend on how you interpret the x-ray. You may interpret an x-ray differently than one of your classmates, or you may even interpret the same x-ray differently each time you look at it. That’s why interpr ...
X-Rays on Earth and From Space NuSTAR Educator`s Guide
... Electromagnetic radiation (e.g., radio, microwaves, light) can be modeled as a wave of changing electric and magnetic fields or as particles called photons. The wave model is useful for explaining many features of electromagnetic radiation, and the particle model explains other features. When light ...
... Electromagnetic radiation (e.g., radio, microwaves, light) can be modeled as a wave of changing electric and magnetic fields or as particles called photons. The wave model is useful for explaining many features of electromagnetic radiation, and the particle model explains other features. When light ...
Learning objectives
... PAUSE- think # frames / second PAUSE – think magnification PAUSE – think Last Image Hold PAUSE – think Image Grab ...
... PAUSE- think # frames / second PAUSE – think magnification PAUSE – think Last Image Hold PAUSE – think Image Grab ...
BasisandPurposeAttachment2009-00806
... that is defensible at a minimum while assuring that technological innovation is not constrained. For example, quality control for monitor images raises complex questions about how best to avoid repeat exposures due to poor image quality. Fluoroscopy, especially pediatric fluoroscopy, has emerged as ...
... that is defensible at a minimum while assuring that technological innovation is not constrained. For example, quality control for monitor images raises complex questions about how best to avoid repeat exposures due to poor image quality. Fluoroscopy, especially pediatric fluoroscopy, has emerged as ...
Introduction to medical imaging
... specialized x-ray projection imaging technique useful for detecting breast anomalies such as masses and calcifications. • Much lower x-ray energies are used in mammography than any other radiographic applications. ...
... specialized x-ray projection imaging technique useful for detecting breast anomalies such as masses and calcifications. • Much lower x-ray energies are used in mammography than any other radiographic applications. ...
Planar X-Ray Imaging - I: Basics (1) Sketch the basic imaging setup
... Describe the effects of scatter on the X-ray image quality. What is a typical percentage of scatter in diagnostic X-ray imaging? ...
... Describe the effects of scatter on the X-ray image quality. What is a typical percentage of scatter in diagnostic X-ray imaging? ...
Tomography
... Pencil beam geometry makes inefficient use of the x-ray source, but it provides excellent x-ray scatter rejection. X-rays that are scattered away from the primary pencil beam do not strike the detector and are not measured. Fan beam geometry makes use of a linear x-ray detector and a divergent fan ...
... Pencil beam geometry makes inefficient use of the x-ray source, but it provides excellent x-ray scatter rejection. X-rays that are scattered away from the primary pencil beam do not strike the detector and are not measured. Fan beam geometry makes use of a linear x-ray detector and a divergent fan ...
High numerical aperture tabletop soft x-ray diffraction microscopy with 70-nm resolution
... Results and Discussion The coherent diffraction pattern from the first stick girl sample when illuminated by the soft x-ray laser for an exposure time of 300 shots (5 min at 1 Hz) is shown in Fig. 2a. To reduce noise originating from the laser source, the optical components, and the CCD detector, we ...
... Results and Discussion The coherent diffraction pattern from the first stick girl sample when illuminated by the soft x-ray laser for an exposure time of 300 shots (5 min at 1 Hz) is shown in Fig. 2a. To reduce noise originating from the laser source, the optical components, and the CCD detector, we ...
master`s of advanced studies in medical physics
... Radiation therapy information systems Acceptance testing and commissioning Quality management of radiotherapy ...
... Radiation therapy information systems Acceptance testing and commissioning Quality management of radiotherapy ...
X-ray
X-radiation (composed of X-rays) is a form of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. In many languages, X-radiation is referred to with terms meaning Röntgen radiation, after Wilhelm Röntgen, who is usually credited as its discoverer, and who had named it X-radiation to signify an unknown type of radiation. Spelling of X-ray(s) in the English language includes the variants x-ray(s), xray(s) and X ray(s).X-rays with photon energies above 5–10 keV (below 0.2–0.1 nm wavelength) are called hard X-rays, while those with lower energy are called soft X-rays. Due to their penetrating ability, hard X-rays are widely used to image the inside of objects, e.g., in medical radiography and airport security. As a result, the term X-ray is metonymically used to refer to a radiographic image produced using this method, in addition to the method itself. Since the wavelengths of hard X-rays are similar to the size of atoms they are also useful for determining crystal structures by X-ray crystallography. By contrast, soft X-rays are easily absorbed in air and the attenuation length of 600 eV (~2 nm) X-rays in water is less than 1 micrometer.There is no universal consensus for a definition distinguishing between X-rays and gamma rays. One common practice is to distinguish between the two types of radiation based on their source: X-rays are emitted by electrons, while gamma rays are emitted by the atomic nucleus. This definition has several problems; other processes also can generate these high energy photons, or sometimes the method of generation is not known. One common alternative is to distinguish X- and gamma radiation on the basis of wavelength (or equivalently, frequency or photon energy), with radiation shorter than some arbitrary wavelength, such as 10−11 m (0.1 Å), defined as gamma radiation.This criterion assigns a photon to an unambiguous category, but is only possible if wavelength is known. (Some measurement techniques do not distinguish between detected wavelengths.) However, these two definitions often coincide since the electromagnetic radiation emitted by X-ray tubes generally has a longer wavelength and lower photon energy than the radiation emitted by radioactive nuclei.Occasionally, one term or the other is used in specific contexts due to historical precedent, based on measurement (detection) technique, or based on their intended use rather than their wavelength or source.Thus, gamma-rays generated for medical and industrial uses, for example radiotherapy, in the ranges of 6–20 MeV, can in this context also be referred to as X-rays.