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Plain Radiography/X-rays
Plain Radiography/X-rays

... process each X-ray and check the results for quality. This can sometimes take several minutes. Sometimes there will be a need for additional images to be taken to obtain more information to help the radiologist (a specialist doctor) make a diagnosis. There is no need for concern if this happens as i ...
Lower dose, better visualization
Lower dose, better visualization

... (EP) lab. An EP planning application supports assessment of the pulmonary vein, left atrial and appendage anatomy and helps to quickly identify anatomy that may complicate the EP procedure. Prior to ESC, the heart centre at the University of Leipzig, Germany, unveiled its hands free catheter ablatio ...
Comparison of CT Wait Times for English- and Spanish
Comparison of CT Wait Times for English- and Spanish

... time. • Fast and simple (vs. MRI). • Cost effective. • Can be used if have metal implantation. • No radiation remains in body after completion. ...
RADIOLOGICAL PHYSICS CENTER
RADIOLOGICAL PHYSICS CENTER

... manual or automatic registration with the planning-CT image. Use of MV EPID or film images as a visual comparison to DRRs does not meet this definition. ...
X-ray Photography
X-ray Photography

... photographic film would become exposed. Roentgen attributed these effects to a new type of radiation (different from the already known cathode rays). They were given the name of X-rays after the algebraic symbol x, meaning an unknown quantity. He soon found that Xrays penetrated through some materia ...
AbstractID: 9853 Title: Position Verification by Fluoroscopy, CT, and other... Position Verification by Fluoroscopy, CT, and other modalities
AbstractID: 9853 Title: Position Verification by Fluoroscopy, CT, and other... Position Verification by Fluoroscopy, CT, and other modalities

... diagnostic fluoroscopy, CT, and other imaging modalities on patient and target positioning, as well as on tumor tracking and/or therapy gating. There are currently commercially available systems for in-room CT in radiotherapy. These systems fall into two categories: 1) standard CT scanners in the tr ...
RT204 - Mohawk Valley Community College
RT204 - Mohawk Valley Community College

... entrance and exit surfaces of the patient during C-arm fluoroscopy, and discuss methods of dose reduction for C-arm operators. Describe methods used to provide patient restraint during a diagnostic x-ray procedure, and identify individuals who might use them. List the three categories of radiation s ...
Cone Beam 3D Imaging
Cone Beam 3D Imaging

... invasive and dedicated action to take. Where the patient has had root canal therapy, but continued to complain about extreme ...
Computed Tomography - Linux.fjfi.cvut.cz
Computed Tomography - Linux.fjfi.cvut.cz

... basis of patient CT images and is therefore patient specific – the target and organs at risk are delineated in CT images (possibly with help of other imaging modalities – PET) – dose calculation algorithms use CT images for determination of dose delivered to the patient during treatment ...
American Imaging Management Clinical Information Work Sheet
American Imaging Management Clinical Information Work Sheet

... Type of cancer suspected_________________________________ _____ Initial staging Biopsy date and result____________________________________ _____ Restaging (after completion of treatment) Type of cancer__________________________________________ Date treatment completed________________________________ ...
SAN DIEGO MESA COLLEGE
SAN DIEGO MESA COLLEGE

... Amends the Public Health Service Act to require personnel who perform or plan the technical component of either medical imaging examinations or radiation therapy procedures for medical purposes to possess, effective January 1, 2013: (1) certification in each medical imaging or radiation therapy moda ...
Pre and Post-treatment Radiology Work
Pre and Post-treatment Radiology Work

... after treatment interval in comparison with uptake on pretreatment images, is indicative of favorable response to treatment High negative predictive value of FDG-PET/CT questions necessity of neck dissection in patients with negative findings after initial chemo- and radio-therapy ...
MASTER`S PROGRAMME IN MEDICAL PHYSICS
MASTER`S PROGRAMME IN MEDICAL PHYSICS

... P6. Monte Carlo simulation methods for medical physics • General Introduction to Monte Carlo methods • Use of Monte Carlo methods in Medical Physics • Basic of Monte Carlo simulation within the Geant4 framework • Practical session of Geant4 simulation • Basic information about other MC tool ...
Surgical Treatment of Movement Disorders
Surgical Treatment of Movement Disorders

... stimulation-induced adverse effects. ...
Print Preview
Print Preview

... more important than the second. Accurate delineation of surface contour, internal structures, and target volume is not only crucial for optimizing a treatment technique, but also necessary for accurate c alculation of dose distribution. Even the tissue heterogeneity ...
Radioactivity
Radioactivity

... shorter and thinner Explanation - electromagnetic γwave remove the electrons from the gas molecules ...
Dosimetry/ Radiation Therapy Terms
Dosimetry/ Radiation Therapy Terms

... PTV- the tumor plus a margin to account for microscopic tumor spread and plus another smaller margin to account for day to day set up variability. This is called the PTV or Planning Target Volume. 84) Cone beam CT (CBCT) - based image guided systems have been integrated with medical linear accelerat ...
Understanding Radiation Dose
Understanding Radiation Dose

... medical radiation since the early 1980s (IMV, 2005).  The contribution that medical radiation makes to the US per capita average annual exposure grew from 15% in the early 1980s to 48% in 2006. (IMV, Ionizing Radiation Exposure of the Population of the United States, 2005). ...
TransMolecular Receives Orphan Drug Designation for Non
TransMolecular Receives Orphan Drug Designation for Non

... normal, healthy cells. As TM601 binds primarily with the tumor cell receptor sites, it also delivers a targeted dose of radiation, killing the tumor cell without affecting nearby healthy cells. The data obtained from preclinical and clinical data also suggest that native TM601 may affect a tumor’s a ...
How CT scanners Work Imagine an upright doughnut. This
How CT scanners Work Imagine an upright doughnut. This

... small box called the x-ray tube. A banana shaped box lies in the 6 o’clock position called the CT detector. These two boxes spin relative to one another during each rotation whether clockwise or counterclockwise. This rotation creates a spiral pattern of images, hence the naming of the pictures as s ...
Image-guided Positioning and Tracking - Dan Ruan
Image-guided Positioning and Tracking - Dan Ruan

... definition and treatment planning are performed on a pre-treatment simulation image (often CT), yet the therapy is delivered to the instantaneous patient geometry later. The planning and delivery geometry may have discrepancy caused by patient setup, inter- and intra- fraction motion, in addition to ...
methods for dose reduction in 128 slice multidetector ct
methods for dose reduction in 128 slice multidetector ct

... This attention has reminded the radiology community that doses must be as low as reasonably achievable (ALARA) while maintaining diagnostic image quality. The idea of an advanced 3rd generation system concept with two set of tube detectors pairs has already been proposed only a few years after CT be ...
DETECTORS FOR IMAGING IN RADIATION THERAPY
DETECTORS FOR IMAGING IN RADIATION THERAPY

... “Clinical use of electronic portal imaging: report of AAPM radiation therapy committee task group 58”, ...
iMaging 5.0: Our Newest Radiology Operating System Unleashed
iMaging 5.0: Our Newest Radiology Operating System Unleashed

... • measuring frequency shift of a particular sample blood volume determines speed and direction ...
Fast-Track Referral Form – Skin Cancer
Fast-Track Referral Form – Skin Cancer

... Submit this form via fax to ...
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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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