Radiation Physics, X-ray safety and protection
... Radiation with sufficiently high energy can ionize atoms. This occurs when an electron is stripped (or "knocked out") from an electron shell of the atom, which leaves the atom with a net positive charge. Because living cells and, more importantly, the DNA in those cells can be damaged by this ioniza ...
... Radiation with sufficiently high energy can ionize atoms. This occurs when an electron is stripped (or "knocked out") from an electron shell of the atom, which leaves the atom with a net positive charge. Because living cells and, more importantly, the DNA in those cells can be damaged by this ioniza ...
Radiological progression of cerebral metastases after radiosurgery: assessment of perfusion MRI
... curve). However, 8 of the 20 patients with tumor recurrence received adjuvant treatment (5 patients underwent neurosurgical resection, and 3 patients received radiotherapy) and had a mean survival from time of radiological progression of 12.8 months, against a mean survival of 5.4 months in the rema ...
... curve). However, 8 of the 20 patients with tumor recurrence received adjuvant treatment (5 patients underwent neurosurgical resection, and 3 patients received radiotherapy) and had a mean survival from time of radiological progression of 12.8 months, against a mean survival of 5.4 months in the rema ...
CHAPTER 2 Neurodiagnostic Studies
... the artery such that frequency of reflected signal is shifted in proportion to velocity of flowing blood), it is possible to perform extracranial (carotid) and transcranial vascular imaging studies. With a pulsed-wave Doppler probe with high tissue penetration characteristics applied at areas of thi ...
... the artery such that frequency of reflected signal is shifted in proportion to velocity of flowing blood), it is possible to perform extracranial (carotid) and transcranial vascular imaging studies. With a pulsed-wave Doppler probe with high tissue penetration characteristics applied at areas of thi ...
NSJ-Spine january 2004 - Tel-Aviv Sourasky Medical Center
... In addition to location, other factors, such as the size of the lesions, the goal of the surgery (biopsy, debulking, or gross–total excision), and the characteristics of the tumor must be considered when selecting an approach.2 In this paper we focus on extraorbital approaches and describe our serie ...
... In addition to location, other factors, such as the size of the lesions, the goal of the surgery (biopsy, debulking, or gross–total excision), and the characteristics of the tumor must be considered when selecting an approach.2 In this paper we focus on extraorbital approaches and describe our serie ...
- Iranian Journal of Medical Physics
... Pettersson HB, Falth-Magnusson K, Persliden J, Scott M. Radiation risk and cost-benefit analysis of a paediatric radiology procedure: results from a national study. Br J Radiol. 2005 Jan;78(925):34-8. Willis CE, Slovis TL. The ALARA concept in pediatric CR and DR: dose reduction in pediatric radiogr ...
... Pettersson HB, Falth-Magnusson K, Persliden J, Scott M. Radiation risk and cost-benefit analysis of a paediatric radiology procedure: results from a national study. Br J Radiol. 2005 Jan;78(925):34-8. Willis CE, Slovis TL. The ALARA concept in pediatric CR and DR: dose reduction in pediatric radiogr ...
Crisp images of the upper neck with Planmeca`s CBCT
... post-processed to include all required slice thicknesses. “They can also be acquired in a high resolution CT scan, but that would produce an even higher radiation dose”, describes Mikkonen. Also, the patient position is better in a CBCT scan than in a CT scan. A CT scan is acquired with the patient ...
... post-processed to include all required slice thicknesses. “They can also be acquired in a high resolution CT scan, but that would produce an even higher radiation dose”, describes Mikkonen. Also, the patient position is better in a CBCT scan than in a CT scan. A CT scan is acquired with the patient ...
Rapid and precise GE Healthcare About GE Healthcare Case study
... A consultation with a radiologist and a physicist should be made to determine the appropriate dose to obtain diagnostic image quality for the particular clinical task. ...
... A consultation with a radiologist and a physicist should be made to determine the appropriate dose to obtain diagnostic image quality for the particular clinical task. ...
L18
... • all objects that are at a temperature above absolute zero emit thermal radiation (waves) • the higher the temp, the more they emit • the color (wavelength) of the emitted waves goes from redorangeyellow blue as the temperature increases ...
... • all objects that are at a temperature above absolute zero emit thermal radiation (waves) • the higher the temp, the more they emit • the color (wavelength) of the emitted waves goes from redorangeyellow blue as the temperature increases ...
Correlation of clinical and MRI staging in cervical carcinoma treated
... Eczacibasi, Istanbul, Turkey) as an antispasmodic agent to suppress intestinal motility. Gadopentate dimeglumine (Magnevist; Schering, Berlin, Germany) was intravenously administered at a dose of 0.1 mmol per kilogram of body weight. To evaluate liver or retroperitoneal LN metastasis and hydronephro ...
... Eczacibasi, Istanbul, Turkey) as an antispasmodic agent to suppress intestinal motility. Gadopentate dimeglumine (Magnevist; Schering, Berlin, Germany) was intravenously administered at a dose of 0.1 mmol per kilogram of body weight. To evaluate liver or retroperitoneal LN metastasis and hydronephro ...
EPSM 2013 Student Abstracts
... acute urinary toxicity after radiotherapy using dosimetric indices derived from dose-volume (dv) which includes bladder content, dose-surface (ds) and dose-wall (dw) information for prostate cancer patients treated with three-dimensional conformal radiotherapy (3D-CRT). METHODS: Digital treatment pl ...
... acute urinary toxicity after radiotherapy using dosimetric indices derived from dose-volume (dv) which includes bladder content, dose-surface (ds) and dose-wall (dw) information for prostate cancer patients treated with three-dimensional conformal radiotherapy (3D-CRT). METHODS: Digital treatment pl ...
Patient-Centered Radiology
... independent, integrated subspecialty, whole body knowledge, brand name, early access to “state-of-the-art” technology, visual experience with in vivo pathology. ...
... independent, integrated subspecialty, whole body knowledge, brand name, early access to “state-of-the-art” technology, visual experience with in vivo pathology. ...
MAGNETIC RESONANCE IMAGING OF PAROTID
... Other series have been smaller or not focused specifically on MRI ...
... Other series have been smaller or not focused specifically on MRI ...
Intro to Radiologic Technology (RADT A)
... Uses ionized radiation to obtain cross sectional images Designated by CT Jennifer Smith, R.T. (R) (CT) 1) Must have primary certification in radiography, nuclear medicine or radiation therapy ...
... Uses ionized radiation to obtain cross sectional images Designated by CT Jennifer Smith, R.T. (R) (CT) 1) Must have primary certification in radiography, nuclear medicine or radiation therapy ...
Radiation Dose in Interventional Radiology PDF
... describes the total energy delivered by the x-ray tube. DAP is measured at a point close to the source of X-rays – often within the collimator housing. DAP is related to stochastic risk since it describes the total energy absorbed by all tissues in the patient. DAP is less useful for estimating dete ...
... describes the total energy delivered by the x-ray tube. DAP is measured at a point close to the source of X-rays – often within the collimator housing. DAP is related to stochastic risk since it describes the total energy absorbed by all tissues in the patient. DAP is less useful for estimating dete ...
clinical applications of spect with special reference to oncology
... Department of Ultrasound and Nuclear Medicine Royal Marsden Hospital. Sutton, Surrey. U.K. ...
... Department of Ultrasound and Nuclear Medicine Royal Marsden Hospital. Sutton, Surrey. U.K. ...
Diffusion Magnetic Resonance Imaging of Solid Vestibular
... schwannomas were in conformity with increased diffusion rates, indicating the presence of increased amounts of extracellular water (a relatively loose tissue) in the tumor matrix. Index Terms: Vestibular schwannoma—Acoustic neuroma—Diffusion magnetic resonance imaging. ...
... schwannomas were in conformity with increased diffusion rates, indicating the presence of increased amounts of extracellular water (a relatively loose tissue) in the tumor matrix. Index Terms: Vestibular schwannoma—Acoustic neuroma—Diffusion magnetic resonance imaging. ...
Natural and Man-Made Radiation Sources
... The earth, and all living things on it, are constantly bombarded by radiation from outer space, similar to a steady drizzle of rain. ...
... The earth, and all living things on it, are constantly bombarded by radiation from outer space, similar to a steady drizzle of rain. ...
Radiation Therapy - El Camino College
... • ARRT in 1999 began post primary exam • ARRT in 2005 began primary exam ...
... • ARRT in 1999 began post primary exam • ARRT in 2005 began primary exam ...
What is Radiation?
... this to an outdoor concert. You can sit directly in front of a speaker, 50 yards from the stage, or on the grass in the park across the street. If you sit in front of the speaker, you will probably suffer some damage to your hearing. If you sit 50 yards from the stage, you will be exposed to an aver ...
... this to an outdoor concert. You can sit directly in front of a speaker, 50 yards from the stage, or on the grass in the park across the street. If you sit in front of the speaker, you will probably suffer some damage to your hearing. If you sit 50 yards from the stage, you will be exposed to an aver ...
White paper on radiation protection by the European Society of
... and/or Monte Carlo simulations of the energy deposition from an x-ray examination. The dose values to important critical organs and tissues are weighted and summed to give the effective dose as defined by the International Commission on Radiological Protection (ICRP), an estimate of a whole body dos ...
... and/or Monte Carlo simulations of the energy deposition from an x-ray examination. The dose values to important critical organs and tissues are weighted and summed to give the effective dose as defined by the International Commission on Radiological Protection (ICRP), an estimate of a whole body dos ...
American Institute for Cancer Research
... "We are very excited by these findings," she says, "and are now trying to understand the mechanism by which soy increases the effect of radiation on tumors while at the same time protecting normal tissue from radiation." ...
... "We are very excited by these findings," she says, "and are now trying to understand the mechanism by which soy increases the effect of radiation on tumors while at the same time protecting normal tissue from radiation." ...
Nuclear Medicine Physics Review
... Constancy: daily, using Cs-137 (660 keV, 30 y) and Co-57 (122 keV, 9 mo) for all ...
... Constancy: daily, using Cs-137 (660 keV, 30 y) and Co-57 (122 keV, 9 mo) for all ...
Ascentis Subject Set Unit Specifications – Physics
... sound waves and how they are reflected from an object. speed/time/distance calculations and acoustic impedance equations for ultrasound. the applicability, benefits and limitations of ultra-sonography techniques. the use of ultra-sonography to develop 3D images of baby tissue in a mother’s w ...
... sound waves and how they are reflected from an object. speed/time/distance calculations and acoustic impedance equations for ultrasound. the applicability, benefits and limitations of ultra-sonography techniques. the use of ultra-sonography to develop 3D images of baby tissue in a mother’s w ...
Reports and Activities of International Commission on Radiation
... Reports and Activities of International Commission on Radiation units and Measurements ICRU Hans-Georg Menzel Chairman – ICRU Main Commission CERN (retired) ...
... Reports and Activities of International Commission on Radiation units and Measurements ICRU Hans-Georg Menzel Chairman – ICRU Main Commission CERN (retired) ...
Understanding Radiation Dose
... Growing Effects of Radiation Myocardial perfusion imaging contributed to 22% of total effective dose from medical imaging studies, while CT of the abdomen, pelvis, chest accounted for 38%, (Fazel, 2009). 2009 National Council on Radiation Protection and Measurements reported a 77-fold increase ...
... Growing Effects of Radiation Myocardial perfusion imaging contributed to 22% of total effective dose from medical imaging studies, while CT of the abdomen, pelvis, chest accounted for 38%, (Fazel, 2009). 2009 National Council on Radiation Protection and Measurements reported a 77-fold increase ...
Neutron capture therapy of cancer
Neutron capture therapy (NCT) is a noninvasive therapeutic modality for treating locally invasive malignant tumors such as primary brain tumors and recurrent head and neck cancer. It is a two step procedure: first, the patient is injected with a tumor localizing drug containing a non-radioactive isotope that has a high propensity or cross section (σ) to capture slow neutrons. The cross section of the capture agent is many times greater than that of the other elements present in tissues such as hydrogen, oxygen, and nitrogen. In the second step, the patient is radiated with epithermal neutrons, which after losing energy as they penetrate tissue, are absorbed by the capture agent which subsequently emits high-energy charged particles, thereby resulting in a biologically destructive nuclear reaction (Fig.1).All of the clinical experience to date with NCT is with the non-radioactive isotope boron-10, and this is known as boron neutron capture therapy (BNCT). At this time, the use of other non-radioactive isotopes, such as gadolinium, has been limited, and to date, it has not been used clinically. BNCT has been evaluated clinically as an alternative to conventional radiation therapy for the treatment of malignant brain tumors (gliomas), and more recently, recurrent, locally advanced head and neck cancer.