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AMERICAN COLLEGE OF EMERGENCY PHYSICIANS
AMERICAN COLLEGE OF EMERGENCY PHYSICIANS

... Resolution 27(12) Radiation Exposure in the ED Page 2 resources including downloadable brochures on radiation and imaging that can be provided to patients, frequently asked questions about radiation, and links to credible outside sources of information. In June 2012, the ACR released a study conclu ...
EPSM 2013 Student Abstracts
EPSM 2013 Student Abstracts

... INTRODUCTION: Track structure simulation confirms that low energy electrons are the prime cause of double strand breaks (DSBs) and lethal cell damage in the treatments such as targeted intraoperative radiation therapy [1]. Higher relative biological effectiveness (RBE) has been attributed to low ene ...
RTOG 0629
RTOG 0629

... KVCT = KV Fan Beam CT scan (e.g., in-room diagnostic CT) MVCT = MV Fan Beam CT scan (e.g., Tomotherapy) MVorth = MV orthogonal images KVorth = KV orthogonal images An institution may use an alternative system for target localization if necessary – for example if an institution’s KVCB is not availabl ...
Cont…
Cont…

... the procedure, the radiation will be distributed over a large volume of tissue rather than being concentrated in one area. For a specific exposure time, tissue exposure values (roentgens) are reduced by moving the beam, but the total radiation (R - cm2) into the body is not changed. This was illustr ...
CTA Physics and Dosimetry
CTA Physics and Dosimetry

... • Conventional/Axial/Sequential CT – The x-ray tube rotates around a stationary patient. The patient table must be incremented after each image is acquired. ...
Generalization of the concept
Generalization of the concept

... one can assume that it affects only about 0.3% of a human being’s brain cells during a person’s life span. What is more, not nearly every interaction causes a cell to be destroyed, so on the basis of this calculation it’s safe to assume that cosmic radiation is not very dangerous to man. Another po ...
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... • Bone scans or salivary gland scans ...
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ACR–ASTRO Practice Parameter for the Performance of Stereotactic
ACR–ASTRO Practice Parameter for the Performance of Stereotactic

... sessions (fractions). Specialized treatment planning results in a high dose of radiation to the target with a much lower dose to the immediate surrounding normal tissues. SBRT is a continuously evolving therapy, including a variety of techniques to address the challenges posted by motion of the targ ...
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The role of the radiography workforce in neuro

... brain, spinal cord and peripheral nervous system. It is used to diagnosis a range of conditions, including tumours, vascular malformations, aneurysms and stroke. Neuro-radiography encompasses a broad range of imaging modalities which, coupled with the vital need for focused and excellent patient cen ...
AAPM REPORT NO. 54 STEREOTACTIC RADIOSURGERY Report
AAPM REPORT NO. 54 STEREOTACTIC RADIOSURGERY Report

... 1988). Overviews of clinical applications of SRS/SRT have been presented by Flickinger and Loeffler (1992), Luxton el al. (1993), McKenzie et al. (1992), and Podgorsak et al. (1987, 1988, 1989, 1990, and 1992). SRS generally consists of identifying a target in the patient's brain that is to be irrad ...
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SUBJECT: Radiation Safety in Pediatric Imaging Radiation Safety in

... adult’s tissues, and these children have a longer time frame to develop radiation induced cancers during their lifetime. The web site “Image Gently” has offered advice and recommendations to help lower the radiation dose to the Pediatric patient. I have forwarded this web site to all of our staff, o ...
IOSR Journal of Applied Physics (IOSR-JAP)
IOSR Journal of Applied Physics (IOSR-JAP)

... radiotherapy for Pelvis tumors is also a reflection of the experience, training, commitment, and time available with radiation therapy staff at an academic radiotherapy unit that treats patients only on approved clinical trials. The 3D mean displacements though comparable with previously published l ...
Press release, info +31 70 3820525, fransp@dds
Press release, info +31 70 3820525, fransp@dds

... other experts they studied the scientific literature between 2000 and 2004 about the effects of mobile telephone systems on well-being and health. The warning by the German experts is more strict than by Sir William Stewart of the British National Radiation Protection Board (NRPB) in January 2005. H ...
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Radiation levels around LHC [Corinna Martinella]

... to the advent of CNGS type beams the electronics lifetime is reduced to 3-4 months (last measurements on a PU exhibit dose rates of 10kGy/y). PS & SPS EAS (Experimental areas) profile monitor. This new system will replace an already installed and aging one. It is based on a radhard ASIC SPACIROC. ...
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... chance of affecting healthy surrounding tissue. And precision alone at the cost of speed means to lose short treatment times, high patient throughput, and a convenient patient experience out of sight. That’s why our radiation therapy solutions aim to incorporate the optimum of both, an intelligent b ...
All patients will receive both EBRT and BT. Summation of EBRT and
All patients will receive both EBRT and BT. Summation of EBRT and

... performed by calculation of a biologically equivalent dose in 2 Gy per fraction (EQD2) using the linear quadratic model with α/β = 10 Gy for tumour effects and α/β=3 Gy for late normal tissue damage.The repair half time is assumed to be 1.5 hrs. EBRT is delivered in accordance with specific defined ...
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Materials covered in lecture - School of Medicine Department of

... The estimated lifetime cancer mortality risks from a single fullbody CT examination at age 45. ...
Chapter 20 - RadTherapy
Chapter 20 - RadTherapy

... or 100 cm on the patient’s skin for each field.  Requires repositioning the patient for each field before treatment.  usually single field, two laterals or an AP/PA treatment  Requires tumor localization in two dimensions only, because all tissues within these fields are treated and the exact dep ...
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Scientific Stage

... Osteosarcoma is the most common bone tissue sarcoma, which mainly occurs in childhood and adolescents. There are no specific patterns of complaints. Swelling and pain are the only complaints where patients suffer from. At diagnosis, an osteosarcoma is often only localized. Metastases at diagnosis ar ...
Power Point 2 - VIA Lab - Carnegie Mellon University
Power Point 2 - VIA Lab - Carnegie Mellon University

... Nuclear medicine images physiology (function)  At the cellular (and subcellular) level  Technically a type of molecular imaging  Requires use of radioactive pharmaceuticals ...
Reports and Activities of International Commission on Radiation
Reports and Activities of International Commission on Radiation

... The definition of appropriate quantities, and their associated units, is a fundamental necessity for any scientific endeavour and for any practical applications of scientific knowledge. ...
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Radiosurgery

Radiosurgery is surgery using radiation, that is, the destruction of precisely selected areas of tissue using ionizing radiation rather than excision with a blade. Like other forms of radiation therapy, it is usually used to treat cancer. Radiosurgery was originally defined by the Swedish neurosurgeon Lars Leksell as “a single high dose fraction of radiation, stereotactically directed to an intracranial region of interest”. In stereotactic radiosurgery (SRS), the word stereotactic refers to a three-dimensional coordinate system that enables accurate correlation of a virtual target seen in the patient's diagnostic images with the actual target position in the patient anatomy.Technological improvements in medical imaging and computing have led to increased clinical adoption of stereotactic radiosurgery and have broadened its scope in recent years. Notwithstanding these improvements, the localization accuracy and precision that are implicit in the word “stereotactic” remain of utmost importance for radiosurgical interventions today. Stereotactic accuracy and precision are significantly increased by using a device known as the N-localizer that was invented by the American physician and computer scientist Russell Brown and that has achieved widespread clinical use in several stereotactic surgical and radiosurgical systems.Recently, the original concept of radiosurgery has been expanded to include treatments comprising up to five fractions, and stereotactic radiosurgery has been redefined as a distinct neurosurgical discipline that utilizes externally generated ionizing radiation to inactivate or eradicate defined targets in the head or spine without the need for a surgical incision. Irrespective of the similarities between the concepts of stereotactic radiosurgery and fractionated radiotherapy, and although both treatment modalities are reported to have identical outcomes for certain indications, the intent of both approaches is fundamentally different. The aim of stereotactic radiosurgery is to destroy target tissue while preserving adjacent normal tissue, where fractionated radiotherapy relies on a different sensitivity of the target and the surrounding normal tissue to the total accumulated radiation dose. Historically, the field of fractionated radiotherapy evolved from the original concept of stereotactic radiosurgery following discovery of the principles of radiobiology: repair, reassortment, repopulation, and reoxygenation. Today, both treatment techniques are complementary as tumors that may be resistant to fractionated radiotherapy may respond well to radiosurgery and tumors that are too large or too close to critical organs for safe radiosurgery may be suitable candidates for fractionated radiotherapy.
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