Imaging Highlights
... • Used to visualize and examine internal body structures The three most common: 1.Radiography (x-ray) 2.Computed Tomography (CT) 3.Magnetic resonance imaging (MRI) ...
... • Used to visualize and examine internal body structures The three most common: 1.Radiography (x-ray) 2.Computed Tomography (CT) 3.Magnetic resonance imaging (MRI) ...
Medical Science ABSTRACT - Sudan University of Science and
... important to note that there is singinficant number of young patients with age range from 20 to 25. Patients in these age groups are more sensitive than older ones, bue to long life expectancy. In CT imaging, there are a number of scan parameters and patient attributes that influence the dose and im ...
... important to note that there is singinficant number of young patients with age range from 20 to 25. Patients in these age groups are more sensitive than older ones, bue to long life expectancy. In CT imaging, there are a number of scan parameters and patient attributes that influence the dose and im ...
An Imaging Process for Early Detection of Colorectal Cancer Using
... intestine using Compton backscattering of X-ray and gamma radiation emitted from a radioactive source. The new imaging process should become a part of the periodic screening program for early detection of colorectal cancer in men and women aged 50 years and more. This study presents an estimate of t ...
... intestine using Compton backscattering of X-ray and gamma radiation emitted from a radioactive source. The new imaging process should become a part of the periodic screening program for early detection of colorectal cancer in men and women aged 50 years and more. This study presents an estimate of t ...
Radiobiology Knowledge Level of Radiologists
... cancer section (55%). Radiologists who carried out training courses scored higher than radiologists without training courses (61%, 54%, respectively). Experience (5.1 ± 0.9) did not correlate significantly with the questionnaire scores. Conclusion: The radiobiology knowledge level can be improved by ...
... cancer section (55%). Radiologists who carried out training courses scored higher than radiologists without training courses (61%, 54%, respectively). Experience (5.1 ± 0.9) did not correlate significantly with the questionnaire scores. Conclusion: The radiobiology knowledge level can be improved by ...
Phantom and in vivo measurements of dose exposure by image
... anterior/posterior and lateral dose was measured in vivo both on skin and in rectum anterior/posterior and lateral dose was measured in vivo both on skin and in rectum ...
... anterior/posterior and lateral dose was measured in vivo both on skin and in rectum anterior/posterior and lateral dose was measured in vivo both on skin and in rectum ...
Shielding Of Medical Facilities. Shielding Design
... located at the PET system console where both, the patient and the progress of the imaging study, can be monitored. • Ideally, the console area should be located more than 2 m away from the scanner to reduce the operator dose below ALARA levels. • In this case, the annual dose results to be 11.4 mSv ...
... located at the PET system console where both, the patient and the progress of the imaging study, can be monitored. • Ideally, the console area should be located more than 2 m away from the scanner to reduce the operator dose below ALARA levels. • In this case, the annual dose results to be 11.4 mSv ...
MAIN SYSTEM SPECIFICATIONS Maximum number of slices 160
... Minimization of the radiation dose is a high priority for all medical imaging practitioners. The dose has to be adjusted appropriately according to the size and shape of each patient. Automatic exposure control systems have proven to be useful in doing this while maintaining diagnostic image quality ...
... Minimization of the radiation dose is a high priority for all medical imaging practitioners. The dose has to be adjusted appropriately according to the size and shape of each patient. Automatic exposure control systems have proven to be useful in doing this while maintaining diagnostic image quality ...
Issues regarding PET Imaging for Incorporation in Radiation
... used to determine the outline of FDG-positive tissue, e.g. by using a threshold based on a percentage of the maximum lesion intensity. In general, these techniques are influenced by multiple factors, such as tumor size and shape, and tumor metabolism. No consensus threshold exists for these approach ...
... used to determine the outline of FDG-positive tissue, e.g. by using a threshold based on a percentage of the maximum lesion intensity. In general, these techniques are influenced by multiple factors, such as tumor size and shape, and tumor metabolism. No consensus threshold exists for these approach ...
Electromagnetic radiation
... In our everyday lifes we use items that make use of electromagnetic radiation: e.g. to listen to the radio, watch TV, use the microwave, x-rays etc. All these are examples of electromagnetic waves that have different wavelengths to each other. ...
... In our everyday lifes we use items that make use of electromagnetic radiation: e.g. to listen to the radio, watch TV, use the microwave, x-rays etc. All these are examples of electromagnetic waves that have different wavelengths to each other. ...
Medical Imaging Tests during Pregnancy
... Safety steps that will be taken during your medical imaging test The technologist will place a lead shield over your belly. In most cases, he or she will keep the imaging test aimed only at the area where your body is being tested. A lead shield helps to block the radiation to those areas it is co ...
... Safety steps that will be taken during your medical imaging test The technologist will place a lead shield over your belly. In most cases, he or she will keep the imaging test aimed only at the area where your body is being tested. A lead shield helps to block the radiation to those areas it is co ...
Computed tomography: Are we aware of radiation risks in computed
... informed on the lifetime cancer risks of ionizing radiation. Larson et al (30) found a conspicuous lack of clear and concise information regarding CTrelated radiation risk that is conveniently available to clinicians, patients, or even radiologists in their study. Brenner et al (31) showed that the ...
... informed on the lifetime cancer risks of ionizing radiation. Larson et al (30) found a conspicuous lack of clear and concise information regarding CTrelated radiation risk that is conveniently available to clinicians, patients, or even radiologists in their study. Brenner et al (31) showed that the ...
People Exposed To More Radiation From Medical
... People Exposed to More Radiation from Medical Exams With its release of a new report, titled Ionizing Radiation Exposure of the Population of the United States (Report No. 160, 2009), the National Council on Radiation Protection and Measurements (NCRP) shares information about the increase in averag ...
... People Exposed to More Radiation from Medical Exams With its release of a new report, titled Ionizing Radiation Exposure of the Population of the United States (Report No. 160, 2009), the National Council on Radiation Protection and Measurements (NCRP) shares information about the increase in averag ...
Mid-coronal
... CT Terminology • DICOM – Digital Imaging and Communications in Medicine – DICOM provides standardized formats for images, a common information model, application service definitions, and protocols for communication. ...
... CT Terminology • DICOM – Digital Imaging and Communications in Medicine – DICOM provides standardized formats for images, a common information model, application service definitions, and protocols for communication. ...
How do we achieve Optimization?
... Factors chosen for Computed Radiography Radiation quality – Energy distribution of photons ...
... Factors chosen for Computed Radiography Radiation quality – Energy distribution of photons ...
Diagnostic dose levels in paediatric CT at the
... levels of radiation when examining each and every child. This results in low levels of retakes, as well as the department’s radiologists accepting nosier images – especially CT images - than normal. 3. How radiation protection during paediatric CT is practised in the facility There is continuous opt ...
... levels of radiation when examining each and every child. This results in low levels of retakes, as well as the department’s radiologists accepting nosier images – especially CT images - than normal. 3. How radiation protection during paediatric CT is practised in the facility There is continuous opt ...
Radiation Safety - Society for Cardiovascular Angiography and
... the product of air kerma and x-ray field area. PKA estimates potential stochastic effects (radiation induced cancer). Peak Skin Dose (PSD, Gy) is the maximum dose received by any local area of patient skin. No current method to measure PSD, it can be estimated if air kerma and x-ray geometry details ...
... the product of air kerma and x-ray field area. PKA estimates potential stochastic effects (radiation induced cancer). Peak Skin Dose (PSD, Gy) is the maximum dose received by any local area of patient skin. No current method to measure PSD, it can be estimated if air kerma and x-ray geometry details ...
No Slide Title
... •List the types of diagnostic imaging. •Explain the uses of radiation therapy. •List the types of surgery and some important ...
... •List the types of diagnostic imaging. •Explain the uses of radiation therapy. •List the types of surgery and some important ...
Gamma-camera SPECT PET Gamma radiation
... How to produce the γ-ray • together with α- and β-decay • relaxation of nuclear isomer (a metastable state of an atomic nucleus caused by the ...
... How to produce the γ-ray • together with α- and β-decay • relaxation of nuclear isomer (a metastable state of an atomic nucleus caused by the ...
SUBJECT: Radiation Safety in Pediatric Imaging Radiation Safety in
... 2) The technologist should use the proper technique for the patient’s size to decrease the radiation dose. 3) The Radiologist should use the least amount of fluoroscopic time and the fewest number of exposures/images to obtain a diagnostic study. A single image per exposure, rather than x/frames per ...
... 2) The technologist should use the proper technique for the patient’s size to decrease the radiation dose. 3) The Radiologist should use the least amount of fluoroscopic time and the fewest number of exposures/images to obtain a diagnostic study. A single image per exposure, rather than x/frames per ...
calibration factor
... reading on the DAP-meter is too high. In other words the DAP-meter is showing higher dose than it should • If the calibration factor is above 1, the reading on the DAP-meter is lower than the real dose. ...
... reading on the DAP-meter is too high. In other words the DAP-meter is showing higher dose than it should • If the calibration factor is above 1, the reading on the DAP-meter is lower than the real dose. ...
Recommended Core Curriculum
... G. Adjoining fields & Special Dosimetry Problems 1. Two-Field Problem 2. Three-Field Problem 3. Craniospinal Gapping 4. Pacemaker 5. Gonadal Dose 6. Pregnant Patient 8. Electron Beam (3 Lectures) Learning Objecives The resident should learn: 1) the basic characteristics of electron beams for therapy ...
... G. Adjoining fields & Special Dosimetry Problems 1. Two-Field Problem 2. Three-Field Problem 3. Craniospinal Gapping 4. Pacemaker 5. Gonadal Dose 6. Pregnant Patient 8. Electron Beam (3 Lectures) Learning Objecives The resident should learn: 1) the basic characteristics of electron beams for therapy ...
Ionizing radiation as a factor of environment
... and therefore one or another kind of instrument must be used for this purpose. Radiation detection instruments should be able to measure both the type (qualitative) and amount (quantitative) of radiation exposure. The operation of such instruments is usually based on their response to charged partic ...
... and therefore one or another kind of instrument must be used for this purpose. Radiation detection instruments should be able to measure both the type (qualitative) and amount (quantitative) of radiation exposure. The operation of such instruments is usually based on their response to charged partic ...
BreAking the trend of increAsed rAdiAtion exposure to pAtients
... duced burn, mainly driven by the increase in complex interventional fluoroscopy procedures which have led to long exposure times and direct skin damage [7]. Secondly, and probably even more discussed, is the long-term danger of radiation elevating a person’s lifetime risk of cancer. Although the can ...
... duced burn, mainly driven by the increase in complex interventional fluoroscopy procedures which have led to long exposure times and direct skin damage [7]. Secondly, and probably even more discussed, is the long-term danger of radiation elevating a person’s lifetime risk of cancer. Although the can ...
Radiation burn
A radiation burn is damage to the skin or other biological tissue caused by exposure to radiation. The radiation types of greatest concern are thermal radiation, radio frequency energy, ultraviolet light and ionizing radiation.The most common type of radiation burn is a sunburn caused by UV radiation. High exposure to X-rays during diagnostic medical imaging or radiotherapy can also result in radiation burns. As the ionizing radiation interacts with cells within the body—damaging them—the body responds to this damage, typically resulting in erythema—that is, redness around the damaged area. Radiation burns are often associated with radiation-induced cancer due to the ability of ionizing radiation to interact with and damage DNA, occasionally inducing a cell to become cancerous. Cavity magnetrons can be improperly used to create surface and internal burning. Depending on the photon energy, gamma radiation can cause very deep gamma burns, with 60Co internal burns are common. Beta burns tend to be shallow as beta particles are not able to penetrate deep into the person; these burns can be similar to sunburn.Radiation burns can also occur with high power radio transmitters at any frequency where the body absorbs radio frequency energy and converts it to heat. The U.S. Federal Communications Commission (FCC) considers 50 watts to be the lowest power above which radio stations must evaluate emission safety. Frequencies considered especially dangerous occur where the human body can become resonant, at 35 MHz, 70 MHz, 80-100 MHz, 400 MHz, and 1 GHz. Exposure to microwaves of too high intensity can cause microwave burns.