CLASSlCAL RADIATION THERAPY
... Basic dose distribution data are usually measured in a water phantom, which closely approximates the radiation absorption and scattering properties of muscle and other soft tissues. Another reason for the choice ofwater as a phantom material is that it is universally available with reproducible radi ...
... Basic dose distribution data are usually measured in a water phantom, which closely approximates the radiation absorption and scattering properties of muscle and other soft tissues. Another reason for the choice ofwater as a phantom material is that it is universally available with reproducible radi ...
cone beam ct for dental and maxillofacial radiology
... One objective of the SEDENTEXCT project has been to review the current literature on CBCT and to derive useful guidelines that will clarify those clinical situations in which this imaging technique would be found to be beneficial to both the clinician and the patient. The method chosen was systemati ...
... One objective of the SEDENTEXCT project has been to review the current literature on CBCT and to derive useful guidelines that will clarify those clinical situations in which this imaging technique would be found to be beneficial to both the clinician and the patient. The method chosen was systemati ...
Detection of pulmonary nodules in chest tomosynthesis
... most challenging tasks for the thoracic radiologist is the detection of pulmonary nodules12, i.e. small rounded structures which may potentially be malignant. Because of the difficulty of the task, but also because of the great clinical importance of pulmonary nodules, the detectability of these les ...
... most challenging tasks for the thoracic radiologist is the detection of pulmonary nodules12, i.e. small rounded structures which may potentially be malignant. Because of the difficulty of the task, but also because of the great clinical importance of pulmonary nodules, the detectability of these les ...
image guided radiation therapy applications for
... argued that adaptive replanning may be more beneficial than patient realignment when intensity modulated radiation therapy techniques are used. Some of the largest dose delivery errors were found in external electron beam treatments for breast cancer patients who underwent breast conserving surgery. ...
... argued that adaptive replanning may be more beneficial than patient realignment when intensity modulated radiation therapy techniques are used. Some of the largest dose delivery errors were found in external electron beam treatments for breast cancer patients who underwent breast conserving surgery. ...
Public Summary Document - Word 93 KB
... Proposed intervention’s place in clinical management CBCT was proposed in addition to clinical assessment with or without two dimensional imaging (e.g. panoramic imaging) and as a replacement to CT. However, the application did not include a clinical management algorithm. CBCT offers more accurate a ...
... Proposed intervention’s place in clinical management CBCT was proposed in addition to clinical assessment with or without two dimensional imaging (e.g. panoramic imaging) and as a replacement to CT. However, the application did not include a clinical management algorithm. CBCT offers more accurate a ...
Dose and image quality for a cone-beam C-arm
... in detector technology, image reconstruction, and image correction algorithms,4–8 three-dimensional 共3D兲 cone-beam C-arm imaging is now beginning to be used for low-contrast imaging applications such as detection of fresh intracranial bleeds.9 This new imaging modality must therefore be evaluated so ...
... in detector technology, image reconstruction, and image correction algorithms,4–8 three-dimensional 共3D兲 cone-beam C-arm imaging is now beginning to be used for low-contrast imaging applications such as detection of fresh intracranial bleeds.9 This new imaging modality must therefore be evaluated so ...
Development and Implementation of an Anthropomorphic Pediatric
... dose deposition to the target volume while sparing the surrounding healthy tissue. This technique is advantageous for craniospinal pediatric patients, as it reduces the radiation side effects that can occur. The purpose of this study is to design an anthropomorphic pediatric spine phantom for use in ...
... dose deposition to the target volume while sparing the surrounding healthy tissue. This technique is advantageous for craniospinal pediatric patients, as it reduces the radiation side effects that can occur. The purpose of this study is to design an anthropomorphic pediatric spine phantom for use in ...
Cone Beam Ct for Dental and Maxillofacial Radiology
... One objective of the SEDENTEXCT project has been to review the current literature on CBCT and to derive useful guidelines that will clarify those clinical situations in which this imaging technique would be found to be beneficial to both the clinician and the patient. The method chosen was systemat ...
... One objective of the SEDENTEXCT project has been to review the current literature on CBCT and to derive useful guidelines that will clarify those clinical situations in which this imaging technique would be found to be beneficial to both the clinician and the patient. The method chosen was systemat ...
QA for helical tomotherapy: Report of the AAPM Task Group 148
... There are a fair number of the TG-142 QA recommendations that can be directly applied to helical tomotherapy 共e.g., output constancy兲. Whenever possible, guidelines from TG142 and other relevant task group reports have been adopted in this report. However, several traditional QA recommendations are ...
... There are a fair number of the TG-142 QA recommendations that can be directly applied to helical tomotherapy 共e.g., output constancy兲. Whenever possible, guidelines from TG142 and other relevant task group reports have been adopted in this report. However, several traditional QA recommendations are ...
M C S O
... patient motion is in the same direction) using small (15º) and large wedge angles (60º) indicates a greater mismatch between the static and motion cases for the large wedge angle. ...
... patient motion is in the same direction) using small (15º) and large wedge angles (60º) indicates a greater mismatch between the static and motion cases for the large wedge angle. ...
Radiological Protection in Cone Beam Computed Tomography
... not met the appropriateness guidelines. While ICRP has provided three levels of justification, there is increasing need to scrutinize justification at level 3, and provide guidance on justification of an examination. The current climate of interest in radiological protection has enhanced the audienc ...
... not met the appropriateness guidelines. While ICRP has provided three levels of justification, there is increasing need to scrutinize justification at level 3, and provide guidance on justification of an examination. The current climate of interest in radiological protection has enhanced the audienc ...
European Journal of Medical Physics
... Introduction: Radiation protection in medicine is becoming a real challenge when dealing with the use of technologies such as CT, fluoroscopy and PET/CT. In Switzerland, since January 2012, medical physicists have to be involved with the medical team dealing with “high dose procedures” such as the on ...
... Introduction: Radiation protection in medicine is becoming a real challenge when dealing with the use of technologies such as CT, fluoroscopy and PET/CT. In Switzerland, since January 2012, medical physicists have to be involved with the medical team dealing with “high dose procedures” such as the on ...
The concept and challenges of TomoTherapy accelerators
... clinical introduction of imaging techniques with better soft tissue contrast or functional capacities, such as magnetic resonance imaging and positron emission tomography, is the logical step for IGRT systems. Recently, the technology of integrating imaging techniques, such as cone-beam-CT (CBCT), h ...
... clinical introduction of imaging techniques with better soft tissue contrast or functional capacities, such as magnetic resonance imaging and positron emission tomography, is the logical step for IGRT systems. Recently, the technology of integrating imaging techniques, such as cone-beam-CT (CBCT), h ...
Imaging of knee injuries with special focus on tibial plateau
... are often difficult to obtain, and in those patients, radiography is unreliable to rule out fractures. Study II showed that MDCT can serve to evaluate cruciate ligaments as well. MDCT detected intact cruciate ligaments with good specificity, accuracy, and negative predictive value, but the assessme ...
... are often difficult to obtain, and in those patients, radiography is unreliable to rule out fractures. Study II showed that MDCT can serve to evaluate cruciate ligaments as well. MDCT detected intact cruciate ligaments with good specificity, accuracy, and negative predictive value, but the assessme ...
Sediment Fingerprinting - UKnowledge
... content, nitrogen isotope ratio, lead content, beryllium content, and microbial population such as E.coli content (Table 2). For a sediment fingerprint, the goal is to identify a unique combination of natural tracers that distinguish sediment sources from one another. This goal is accomplished using ...
... content, nitrogen isotope ratio, lead content, beryllium content, and microbial population such as E.coli content (Table 2). For a sediment fingerprint, the goal is to identify a unique combination of natural tracers that distinguish sediment sources from one another. This goal is accomplished using ...
Optimisation of radiation dose and image quality for AP pelvis
... 1.6. Self-efficacy and Bandura’s guidelines for scale construction .......................................... 26 1.6.1. Introduction ................................................................................................................. 26 1.6.2. Sources of self-efficacy .................. ...
... 1.6. Self-efficacy and Bandura’s guidelines for scale construction .......................................... 26 1.6.1. Introduction ................................................................................................................. 26 1.6.2. Sources of self-efficacy .................. ...
the 2016 handbook - STATERHC State Exam Payment Site
... The Bright Line Between What’s OK and What’s Not Candidates for state licensing and/or permit examinations see language in the ARRT state licensing examination handbooks, as well as the non-disclosure screens at the test center that clarify what they are agreeing to comply with regarding exam securi ...
... The Bright Line Between What’s OK and What’s Not Candidates for state licensing and/or permit examinations see language in the ARRT state licensing examination handbooks, as well as the non-disclosure screens at the test center that clarify what they are agreeing to comply with regarding exam securi ...
Custom AFM for X-ray beamlines: in situ biological
... spring constant. This has limited the applications of the X-ray– AFM powerful combination to a very narrow range of experiments, preventing investigations in liquids on soft and biological materials where cantilevers with a stiffness inferior to 1 N m1 have to be employed, as well as Electrostatic ...
... spring constant. This has limited the applications of the X-ray– AFM powerful combination to a very narrow range of experiments, preventing investigations in liquids on soft and biological materials where cantilevers with a stiffness inferior to 1 N m1 have to be employed, as well as Electrostatic ...
Conventional Radiography of the Shoulder
... but are most common in patients over 50 years of age, and typically result from a fall on an outstretched arm or secondary to direct trauma. Neer developed a four-part classification scheme as a means of describing proximal humeral fractures and predicting clinical outcomes.20 The system uses the fo ...
... but are most common in patients over 50 years of age, and typically result from a fall on an outstretched arm or secondary to direct trauma. Neer developed a four-part classification scheme as a means of describing proximal humeral fractures and predicting clinical outcomes.20 The system uses the fo ...
Proton radiography and tomography - Surrey Research Insight Open
... to reach the clinic.2 Few manufacturers currently offer a clinical imaging system suitable for proton radiography and none for proton tomography. In fact, it turns out that the use of protons instead of x-rays for transmission imaging has some disadvantages. These include the limitations on imagequa ...
... to reach the clinic.2 Few manufacturers currently offer a clinical imaging system suitable for proton radiography and none for proton tomography. In fact, it turns out that the use of protons instead of x-rays for transmission imaging has some disadvantages. These include the limitations on imagequa ...
Chapter 540: Radiology, Nuclear Medicine and Radiation Oncology
... Cardiology / Pulmonary Services, and DoD Chapter 440: Surgery: Inpatient and Ambulatory. Imaging resources may be distributed throughout the MTF; therefore, imaging resources are covered in other Space Planning Criteria chapters. For example, the Emergency Department (Chapter 350) provides CT and Ge ...
... Cardiology / Pulmonary Services, and DoD Chapter 440: Surgery: Inpatient and Ambulatory. Imaging resources may be distributed throughout the MTF; therefore, imaging resources are covered in other Space Planning Criteria chapters. For example, the Emergency Department (Chapter 350) provides CT and Ge ...
An X-ray Source Model and Characterization Method for Computing
... phantoms for radiographic imaging procedures. We then measured imaging doses in homogeneous cylindrical and heterogeneous anthropomorphic phantoms for default CBCT protocols. The percent dose difference between measurement and computation was generally ≤ 3% in homogeneous and ≤ 6% in heterogeneous g ...
... phantoms for radiographic imaging procedures. We then measured imaging doses in homogeneous cylindrical and heterogeneous anthropomorphic phantoms for default CBCT protocols. The percent dose difference between measurement and computation was generally ≤ 3% in homogeneous and ≤ 6% in heterogeneous g ...
Quality Assurance for PET and PET/CT Systems
... imaging techniques is frequent and growing within the fields of diagnostic imaging, oncology, cardiology and neurology, where they allow physicians to locate and diagnose malignant diseases accurately. Specific topics of discussion include the frameworks for reference values, tolerances and action l ...
... imaging techniques is frequent and growing within the fields of diagnostic imaging, oncology, cardiology and neurology, where they allow physicians to locate and diagnose malignant diseases accurately. Specific topics of discussion include the frameworks for reference values, tolerances and action l ...
Influence of Horizontal Condylar Angle and X
... More advanced, sophisticated panoramic units have the option of changing the x-ray beam angle to match the horizontal condylar angle of the patient. This adjustment is done by taking a submento-vertex projection, from which the horizontal condylar angle can be measured. Based on this angle, the xray ...
... More advanced, sophisticated panoramic units have the option of changing the x-ray beam angle to match the horizontal condylar angle of the patient. This adjustment is done by taking a submento-vertex projection, from which the horizontal condylar angle can be measured. Based on this angle, the xray ...
Tomotherapy vs IMRT (952kB PPT)
... tomotherapy, are inherently much more reliable since the sensors need to read only in open or closed ...
... tomotherapy, are inherently much more reliable since the sensors need to read only in open or closed ...