Walter et al. (2007) Radiotherapy and Oncology 85
... tissue can be achieved by using photons of lower energy, for example with an X-ray source inside the treatment room emitting photons with a maximum energy of 80–140 keV. While these devices provide images of the bony anatomy with better quality than MV PI can offer, soft tissue information is still ...
... tissue can be achieved by using photons of lower energy, for example with an X-ray source inside the treatment room emitting photons with a maximum energy of 80–140 keV. While these devices provide images of the bony anatomy with better quality than MV PI can offer, soft tissue information is still ...
Intervention Conceptual example of the “fusion map”
... • MediGuide™ Technology – Location of device-based sensors in 3D space using a low-powered electromagnetic field – Overlay MediGuide Enabled™ devices on the corresponding pre-obtained image • Reduction of the duration of live X-ray during a procedure ...
... • MediGuide™ Technology – Location of device-based sensors in 3D space using a low-powered electromagnetic field – Overlay MediGuide Enabled™ devices on the corresponding pre-obtained image • Reduction of the duration of live X-ray during a procedure ...
Medical Physics Department
... Verification of Volumetric Modulated Arc Therapy (VMAT) on Elekta Synergy and Synergy S units. This effort spanned almost 2 years and involved input from many members of the physics team including electronics, physics technologists, physics residents and medical physicists. VMAT treatments involve g ...
... Verification of Volumetric Modulated Arc Therapy (VMAT) on Elekta Synergy and Synergy S units. This effort spanned almost 2 years and involved input from many members of the physics team including electronics, physics technologists, physics residents and medical physicists. VMAT treatments involve g ...
2 Quality Control of a Simulator
... • Implanted markers: These markers can be observed in MV images provided that there are a sufficient number of these, the location and orientation of the organ in which they are embedded can be determined. Markers have been used widely for prostate treatments. ...
... • Implanted markers: These markers can be observed in MV images provided that there are a sufficient number of these, the location and orientation of the organ in which they are embedded can be determined. Markers have been used widely for prostate treatments. ...
A Swallow of The Right Maxillary Posterior Region: CBCT, CT and
... assess paranasal sinuses. The advantages of CBCT scanning include lower radiation dose, higher resolution, and reduced scanning time in comparison with Computed Tomography (CT). However, CT is considered the gold standard for sinus diagnosis, because of its ability to both bone and soft tissue. In t ...
... assess paranasal sinuses. The advantages of CBCT scanning include lower radiation dose, higher resolution, and reduced scanning time in comparison with Computed Tomography (CT). However, CT is considered the gold standard for sinus diagnosis, because of its ability to both bone and soft tissue. In t ...
6 The Simulation Process in the Determination and Definition of the
... the physician outlines areas to receive therapeutic radiation doses. A shortcoming of a conventional simulation process is that very little anatomy, other than bony anatomy, is available for design of treatment portals. Shortly after the introduction of clinical CT scanners in early 1970s, it was re ...
... the physician outlines areas to receive therapeutic radiation doses. A shortcoming of a conventional simulation process is that very little anatomy, other than bony anatomy, is available for design of treatment portals. Shortly after the introduction of clinical CT scanners in early 1970s, it was re ...
Quality assurance for image-guided radiation therapy
... register to the treatment beam isocentre.7 The clinical introduction of these guidance systems (Table I) has allowed the assessment and correction of patient positioning uncertainties, revealed internal organ motion and deformation, and is paving the way toward advanced and adaptive RT. By improving ...
... register to the treatment beam isocentre.7 The clinical introduction of these guidance systems (Table I) has allowed the assessment and correction of patient positioning uncertainties, revealed internal organ motion and deformation, and is paving the way toward advanced and adaptive RT. By improving ...
EANM procedure guideline for the treatment of liver
... introduced tyrosine kinase inhibitors, e.g. sorafenib. Colorectal cancer is the second most lethal cancer in Europe and liver metastases are prevalent either at diagnosis or in follow-up. These patients are usually treated by a sequence of surgery, chemotherapy and antibody therapy [Okuda et al. (Ca ...
... introduced tyrosine kinase inhibitors, e.g. sorafenib. Colorectal cancer is the second most lethal cancer in Europe and liver metastases are prevalent either at diagnosis or in follow-up. These patients are usually treated by a sequence of surgery, chemotherapy and antibody therapy [Okuda et al. (Ca ...
NCAT Coding Guide for Radiotherapy (External Beam
... Single electron (e.g. breast boost / soft tissue mass etc) 3 or 4 field palliative Any other simple technique that does not require serial imaging. ...
... Single electron (e.g. breast boost / soft tissue mass etc) 3 or 4 field palliative Any other simple technique that does not require serial imaging. ...
Considerations Regarding Radiation Exposure in
... Image noise, which degrades CT image quality, is inversely related to the X-ray beam energy and increases as tube current or tube voltage decreases. The challenge to the practicing radiologist and nuclear medicine physician is to determine the acceptable range of image quality and to establish the m ...
... Image noise, which degrades CT image quality, is inversely related to the X-ray beam energy and increases as tube current or tube voltage decreases. The challenge to the practicing radiologist and nuclear medicine physician is to determine the acceptable range of image quality and to establish the m ...
Computed Tomography: Physical principles and biohazards
... Figure 1. (a) Third-generation CT scanner. The X-ray tube and the receptor array are located on opposite sides of the patient and both rotate around the patient during data acquisition. In this particular situation the receptor array consists of about 700 pressurised Xenon detectors. (b) Fourth-gene ...
... Figure 1. (a) Third-generation CT scanner. The X-ray tube and the receptor array are located on opposite sides of the patient and both rotate around the patient during data acquisition. In this particular situation the receptor array consists of about 700 pressurised Xenon detectors. (b) Fourth-gene ...
ACR-SPR Practice Parameter for the Performance of Computed
... concurrently. Scans should be obtained through the entire area of interest. The scan field of view should be optimized for each patient. Scans should generally be obtained during suspended respiration but may be obtained during free breathing for certain indications, such as radiation therapy planni ...
... concurrently. Scans should be obtained through the entire area of interest. The scan field of view should be optimized for each patient. Scans should generally be obtained during suspended respiration but may be obtained during free breathing for certain indications, such as radiation therapy planni ...
design and implementation of an anthropomorphic quality
... different densities than the surrounding water and plastics for imaging and target identification purposes. However, the differences in density and atomic number were small enough to have an insignificant effect on treatment delivery. The insert was designed to hold TLDs in the two planning target v ...
... different densities than the surrounding water and plastics for imaging and target identification purposes. However, the differences in density and atomic number were small enough to have an insignificant effect on treatment delivery. The insert was designed to hold TLDs in the two planning target v ...
DRAXIMAGE® DTPA
... Contents of the reaction vial are intended only for use in the preparation of Technetium Tc 99m Pentetate Injection and are NOT to be administered directly to the patient. The image quality may be adversely affected by impaired renal function. Literature reports indicate that the target to non-targe ...
... Contents of the reaction vial are intended only for use in the preparation of Technetium Tc 99m Pentetate Injection and are NOT to be administered directly to the patient. The image quality may be adversely affected by impaired renal function. Literature reports indicate that the target to non-targe ...
MEDICAL PHYSICS QUESTIONS FOR MEMBERSHIP
... 25. Discuss in detail the two types of x-ray production resulting from an electron beam with a given kinetic energy incident on a tungsten target. Describe their relative contributions to the emitted radiation. 26. Discuss heat production and dissipation in x-ray tubes. Sketch typical x-ray tube rat ...
... 25. Discuss in detail the two types of x-ray production resulting from an electron beam with a given kinetic energy incident on a tungsten target. Describe their relative contributions to the emitted radiation. 26. Discuss heat production and dissipation in x-ray tubes. Sketch typical x-ray tube rat ...
Foreword: Radiology Select Volume 5—Radiation Dose and
... for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in substantial concern from physicians, patients, and regulators. Consequently, ...
... for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in substantial concern from physicians, patients, and regulators. Consequently, ...
Apresentação do PowerPoint
... 3-Presentation as round, well-circumscribed lesions instead of infiltrative In our series, all patients (99%) but one (0.92%), presented with well circumscribed round or oval lesion, that could be entirely resected. 4-Presence of cysts along with solid components Large cysts along with solid compone ...
... 3-Presentation as round, well-circumscribed lesions instead of infiltrative In our series, all patients (99%) but one (0.92%), presented with well circumscribed round or oval lesion, that could be entirely resected. 4-Presence of cysts along with solid components Large cysts along with solid compone ...
Chapter 5 Treatment Machines for External Beam - Phy428-528
... 5.1 INTRODUCTION Specialized machines used for modern radiotherapy: ...
... 5.1 INTRODUCTION Specialized machines used for modern radiotherapy: ...
Cardiovascular Computed Tomography: Current and Future
... Figure 2.3. Multicycle reconstruction. Single cycle recon (a) the duration of the acquisition window (gray bar) is approximately equivalent to one-half the gantry rotation time, since this is the time required to obtain 180° of attenuation data. Multicycle recon (b) When multiple detector rows are ...
... Figure 2.3. Multicycle reconstruction. Single cycle recon (a) the duration of the acquisition window (gray bar) is approximately equivalent to one-half the gantry rotation time, since this is the time required to obtain 180° of attenuation data. Multicycle recon (b) When multiple detector rows are ...
Imaging Modalities in Brain Tumors
... suited to 3D imaging, which is used when high resolution and thin contiguous slices are required. 2D and 3D GRE sequences are essential for time-of-flight MR angiography (MRA). The most important disadvantage is that there is no compensation for magnetic field inhomogeneities, and therefore, they ar ...
... suited to 3D imaging, which is used when high resolution and thin contiguous slices are required. 2D and 3D GRE sequences are essential for time-of-flight MR angiography (MRA). The most important disadvantage is that there is no compensation for magnetic field inhomogeneities, and therefore, they ar ...
Full Text - RSNA Publications Online
... In radiation protection, the guiding philosophy is ALARA (as low as reasonably achievable), and states have regulatory authority. Dose limits are in part based on effective dose equivalent and differences in tissue sensitivities. In diagnostic radiology, the main source of occupational dose is scatt ...
... In radiation protection, the guiding philosophy is ALARA (as low as reasonably achievable), and states have regulatory authority. Dose limits are in part based on effective dose equivalent and differences in tissue sensitivities. In diagnostic radiology, the main source of occupational dose is scatt ...
Committee on Medical Physics
... This course explores ethical issues that arise in the practice of medical physics in research, education and clinical settings. Topics include misconduct (fabrication, falsification and plagiarism) and questionable conduct in scientific research; authorship and publication practices; human subject r ...
... This course explores ethical issues that arise in the practice of medical physics in research, education and clinical settings. Topics include misconduct (fabrication, falsification and plagiarism) and questionable conduct in scientific research; authorship and publication practices; human subject r ...
Generation of x-rays (cont) - gnssn
... were first introduced with the advent of computed tomography (CT) in 1972. Continuing advances in computer technology have promoted the general development of image acquisition in digital form (CCD cameras), most commonly from image intensifiers (digital fluoroscopy) or from storage phosphor plates ...
... were first introduced with the advent of computed tomography (CT) in 1972. Continuing advances in computer technology have promoted the general development of image acquisition in digital form (CCD cameras), most commonly from image intensifiers (digital fluoroscopy) or from storage phosphor plates ...
Improving patient dose management using
... This information allows the audit of clinical protocols and the improvement of patient dose management especially during fluoroscopically guided procedures in radiology and cardiology. Interventional fluoroscopes complying with the International Electrotechnical Commission IEC 60601-2-43 [1] provide ...
... This information allows the audit of clinical protocols and the improvement of patient dose management especially during fluoroscopically guided procedures in radiology and cardiology. Interventional fluoroscopes complying with the International Electrotechnical Commission IEC 60601-2-43 [1] provide ...
Document
... were first introduced with the advent of computed tomography (CT) in 1972. Continuing advances in computer technology have promoted the general development of image acquisition in digital form (CCD cameras), most commonly from image intensifiers (digital fluoroscopy) or from storage phosphor plates ...
... were first introduced with the advent of computed tomography (CT) in 1972. Continuing advances in computer technology have promoted the general development of image acquisition in digital form (CCD cameras), most commonly from image intensifiers (digital fluoroscopy) or from storage phosphor plates ...