Scanner Brochure
... work. Up to 150 forms and letters arrive daily as part of serving over 13,000 patients. To deal with this flood of documents, they rely on a Kodak i2420 Scanner, integrated with workflow and document management software. The solution captures data and makes it available to 20 clinical team members. ...
... work. Up to 150 forms and letters arrive daily as part of serving over 13,000 patients. To deal with this flood of documents, they rely on a Kodak i2420 Scanner, integrated with workflow and document management software. The solution captures data and makes it available to 20 clinical team members. ...
Current and Future Trends in Proton Treatment of Prostate Cancer
... range (Bragg peak) No exit dose Dose advantage over any photon beam Depth of peak (proton range) adjustable with energy or bolus material Modulation generates spread-out Bragg peak Next step in the evolution of radiotherapy ...
... range (Bragg peak) No exit dose Dose advantage over any photon beam Depth of peak (proton range) adjustable with energy or bolus material Modulation generates spread-out Bragg peak Next step in the evolution of radiotherapy ...
Dose assessment in Nuclear Medicine Therapy
... estimate of the Biological Effective Dose (BED) and the Equivalent Uniform Dose (EUD) BED can be evaluated by simple dosimetry technique (mean value), even if a better estimate of both BED and EUD is furnished by voxel dosimetry (BED and ...
... estimate of the Biological Effective Dose (BED) and the Equivalent Uniform Dose (EUD) BED can be evaluated by simple dosimetry technique (mean value), even if a better estimate of both BED and EUD is furnished by voxel dosimetry (BED and ...
Full Text - RSNA Publications Online
... near patients for long times, and angulated geometries with C-arm equipment may result in high personnel doses from backscatter. For all procedures, judicious applications of time, distance, and shielding affect dose. Appropriate use includes collimating properly, optimizing beam-on time, minimizing ...
... near patients for long times, and angulated geometries with C-arm equipment may result in high personnel doses from backscatter. For all procedures, judicious applications of time, distance, and shielding affect dose. Appropriate use includes collimating properly, optimizing beam-on time, minimizing ...
AAPM-RSNA Physics Tutorial for Residents: Typical Patient
... change as the square of the change in peak kilovoltage. The selection of higher peak kilovoltages increases the average energy of the x rays and therefore beam penetrability. As the beam becomes more penetrating, more x rays will reach the image receptor during the same period of time. In practice, ...
... change as the square of the change in peak kilovoltage. The selection of higher peak kilovoltages increases the average energy of the x rays and therefore beam penetrability. As the beam becomes more penetrating, more x rays will reach the image receptor during the same period of time. In practice, ...
Radiologic Science 1 Review
... b.Filaments are made of tungsten (because of its high melting point); a small amount of thorium is added to reduce vaporization and prolong tube life c.Filaments are heated slightly when the x-ray machine is turned on; no electrons are ejected at this low level of heating d.During x-ray exposure, on ...
... b.Filaments are made of tungsten (because of its high melting point); a small amount of thorium is added to reduce vaporization and prolong tube life c.Filaments are heated slightly when the x-ray machine is turned on; no electrons are ejected at this low level of heating d.During x-ray exposure, on ...
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... Beam shaping filters specific to cardiac CT ...
... Beam shaping filters specific to cardiac CT ...
Foreword: Radiology Select Volume 5—Radiation Dose and
... agencies. In addition, the rapidly improving technology and the ever increasing number of articles published on the topic of radiation dose reduction every year indicate that we are far from a stable situation from which the medical community could develop universal consensus on best practices for r ...
... agencies. In addition, the rapidly improving technology and the ever increasing number of articles published on the topic of radiation dose reduction every year indicate that we are far from a stable situation from which the medical community could develop universal consensus on best practices for r ...
Attenuation
... Digital Imaging • Broad term first used medically in 1970s in computed tomography (CT). • Digital imaging is defined as any image q p process that p produces an acquisition electronic image that can be viewed and manipulated on a computer. • In radiology, images can be sent via computer networks to ...
... Digital Imaging • Broad term first used medically in 1970s in computed tomography (CT). • Digital imaging is defined as any image q p process that p produces an acquisition electronic image that can be viewed and manipulated on a computer. • In radiology, images can be sent via computer networks to ...
CHAPTER 64E-5 CONTROL OF RADIATION HAZARDS
... (1) Limitation of the Useful Beam. (a) The fluoroscopic tube shall not produce x-rays unless the primary protective barrier is in position to intercept the entire cross section of the useful beam. (b) A means shall be provided between the x-ray source and the patient for stepless adjustment of the s ...
... (1) Limitation of the Useful Beam. (a) The fluoroscopic tube shall not produce x-rays unless the primary protective barrier is in position to intercept the entire cross section of the useful beam. (b) A means shall be provided between the x-ray source and the patient for stepless adjustment of the s ...
X-ray Performance Evaluation of the Dexela CMOS APS X
... important requirement in all cases is the high detectability of X-rays at low dose levels, because for all these methods a sequence of images is acquired. In the current study we used monochromatic synchrotron radiation to measure the X-ray performance of a CMOS APS X-ray detector as a function of e ...
... important requirement in all cases is the high detectability of X-rays at low dose levels, because for all these methods a sequence of images is acquired. In the current study we used monochromatic synchrotron radiation to measure the X-ray performance of a CMOS APS X-ray detector as a function of e ...
Principles of Computerized Tomographic Imaging
... can be regrouped to generate a set of complementary fan-beam projections. The z gap of 360 LI is equal to s or pD while the z gap of 180 LI the gap between the solid and dashed helices is equal to s/2 or (p/2)D. This explains why 180 LI yields a better IQ than 360 LI. Furthermore, varying the table ...
... can be regrouped to generate a set of complementary fan-beam projections. The z gap of 360 LI is equal to s or pD while the z gap of 180 LI the gap between the solid and dashed helices is equal to s/2 or (p/2)D. This explains why 180 LI yields a better IQ than 360 LI. Furthermore, varying the table ...
Weightbearing CBCT, MDCT, and 2D imaging dosimetry of the foot
... visualization of separate bony structures [4, 5]; however, this examination is expensive, limited in availability to hospitals and large radiology practices, and is associated with significantly increased x-ray dose in relation to plain views. Cone Beam CT (CBCT) represents a less expensive alternat ...
... visualization of separate bony structures [4, 5]; however, this examination is expensive, limited in availability to hospitals and large radiology practices, and is associated with significantly increased x-ray dose in relation to plain views. Cone Beam CT (CBCT) represents a less expensive alternat ...
ViewRay™ References
... Magnetic and RF shielding calculations were performed and confirmed with appropriate measurements. The prototype is currently on a fixed gantry; however, in the very near future, the linac and MR magnet will rotate in unison such that the linac is always aimed through the opening in the biplanar mag ...
... Magnetic and RF shielding calculations were performed and confirmed with appropriate measurements. The prototype is currently on a fixed gantry; however, in the very near future, the linac and MR magnet will rotate in unison such that the linac is always aimed through the opening in the biplanar mag ...
1 Comparison of Effective Dose and Lifetime Risk of Cancer
... TLDs for lymph nodes, muscle, bone surface and skin was not performed as they are large organs/systems and it was deemed these would contribute very little to the overall E and lifetime biological risk calculations as only a small proportion of the tissue would be exposed during the imaging process ...
... TLDs for lymph nodes, muscle, bone surface and skin was not performed as they are large organs/systems and it was deemed these would contribute very little to the overall E and lifetime biological risk calculations as only a small proportion of the tissue would be exposed during the imaging process ...
Training Prospectus for Medical Physics Interns
... Whatever type of evidence is submitted, it is also expected to demonstrate those core competencies associated with communication and presentation skills. Ideally the portfolio should consist of well-presented and structured material that is interesting to read and free from inaccuracies and inconsis ...
... Whatever type of evidence is submitted, it is also expected to demonstrate those core competencies associated with communication and presentation skills. Ideally the portfolio should consist of well-presented and structured material that is interesting to read and free from inaccuracies and inconsis ...
Advantages of using X-RAY REVIEWER
... diagnostic procedures e.g. computed tomography and recently the computed radiography or “CR”. CR has been used in human medical imaging since the 1980s ...
... diagnostic procedures e.g. computed tomography and recently the computed radiography or “CR”. CR has been used in human medical imaging since the 1980s ...
Basic Principles of Computed Axial Tomography
... From The Edward Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Mo. Michel M. Ter-Pogossian, Ph.D.: The Edward Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Mo. Reprint requests should be addressed to M. M. TerPogo ...
... From The Edward Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Mo. Michel M. Ter-Pogossian, Ph.D.: The Edward Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Mo. Reprint requests should be addressed to M. M. TerPogo ...
x-ray examinations in health care
... keep the patient’s radiation exposure as low as reasonably achievable. X-ray ...
... keep the patient’s radiation exposure as low as reasonably achievable. X-ray ...
Dose reduction in maxillofacial imaging using low dose
... standard deviation (S.D.) and the p-value for the statistical analysis in the non-shielding and the shielding techniques. In the non-shielding technique, the doses ranged from 0.16 mGy in oesophagus to 1.67 mGy in bone marrow of the mandible. It is noteworthy that the absorbed doses of bone marrow o ...
... standard deviation (S.D.) and the p-value for the statistical analysis in the non-shielding and the shielding techniques. In the non-shielding technique, the doses ranged from 0.16 mGy in oesophagus to 1.67 mGy in bone marrow of the mandible. It is noteworthy that the absorbed doses of bone marrow o ...
CT artifacts: Causes and reduction techniques
... soft tissue boundaries may be obscured. For conventional filtered backprojection (FBP) images, the standard deviation in Hounsfield units (HU) due to Poisson noise [2] is proportional to 1/ slice thickness mAs . This relationship applies when comparing corresponding regions in two images acquired ...
... soft tissue boundaries may be obscured. For conventional filtered backprojection (FBP) images, the standard deviation in Hounsfield units (HU) due to Poisson noise [2] is proportional to 1/ slice thickness mAs . This relationship applies when comparing corresponding regions in two images acquired ...
放射治療設備品質保證原理 Comprehensive QA for radiation onlology
... radiation therapy as prescribed by a radiation oncologist. Be expected to recognized any change in the patient’s condition and determine when treatment should be withheld until a physician is consulted. Be able to detect any equipment deviations or malfunctions, understand the safe operating limit o ...
... radiation therapy as prescribed by a radiation oncologist. Be expected to recognized any change in the patient’s condition and determine when treatment should be withheld until a physician is consulted. Be able to detect any equipment deviations or malfunctions, understand the safe operating limit o ...
Backscatter X-ray
Backscatter X-ray is an advanced X-ray imaging technology. Traditional X-ray machines detect hard and soft materials by the variation in transmission through the target. In contrast, backscatter X-ray detects the radiation that reflects from the target. It has potential applications where less-destructive examination is required, and can be used if only one side of the target is available for examination.The technology is one of two types of whole body imaging technologies that have been used to perform full-body scans of airline passengers to detect hidden weapons, tools, liquids, narcotics, currency, and other contraband. A competing technology is millimeter wave scanner. An airport security machine of this type is also referred to as ""body scanner"", ""whole body imager (WBI)"", ""security scanner"", and ""naked scanner"".