- The University of Liverpool Repository
... request10. Medico-legal issues associated with non-use or misuse of pre-exposure ASMs may arise and radiographers and other health care professionals have been held responsible and disciplined due to such errors11, 12. Specific guidelines exist which should be followed by all radiographers when usin ...
... request10. Medico-legal issues associated with non-use or misuse of pre-exposure ASMs may arise and radiographers and other health care professionals have been held responsible and disciplined due to such errors11, 12. Specific guidelines exist which should be followed by all radiographers when usin ...
2 Quality Assurance In A Diagnostic Radiology Department
... green region of the visible spectrum) coated on one side with an anti -halation backing on the reverse. Films should match the single fluorescent screen in the mammography cassette. High contrast, high sensitivity films should be selected. Should be processed in a machine where the parameters are cl ...
... green region of the visible spectrum) coated on one side with an anti -halation backing on the reverse. Films should match the single fluorescent screen in the mammography cassette. High contrast, high sensitivity films should be selected. Should be processed in a machine where the parameters are cl ...
The Modern Technology of Radiation Oncology, Vol. 1
... evolving technologies and, thus, provides a comprehensive overview. Anyone embarking on any of these new procedures will be able to gain some basic insight as to what is required to make that procedure clinically viable. Nowhere can all these technologies be found in one cancer therapy center. Howev ...
... evolving technologies and, thus, provides a comprehensive overview. Anyone embarking on any of these new procedures will be able to gain some basic insight as to what is required to make that procedure clinically viable. Nowhere can all these technologies be found in one cancer therapy center. Howev ...
Code of Colorado Regulations - Colorado Secretary of State
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
Special procedures and techniques in radiotherapy
... Simple one-dimensional compensator used for lateral field irradiation technique. The compensator corrects for tissue variations along one line only. The numbers shown in this figure are direct dose measurements. The numbers in parenthesis are calculated from the entrance and exit surface measurement ...
... Simple one-dimensional compensator used for lateral field irradiation technique. The compensator corrects for tissue variations along one line only. The numbers shown in this figure are direct dose measurements. The numbers in parenthesis are calculated from the entrance and exit surface measurement ...
CURRICULUMVITAE E. ISHMAEL PARSAI, Ph.D., FACRO, FAAPM
... PROFESSIONAL CONSULTING SERVICES AS EXPERT MEDICAL PHYSICIST: Since January of 2006, I have participated in numerous professional activities as an Expert Medical Physicist (EMP) performing various requested tasks. Those include but not limited to litigation cases, error assessment on ongoing litigat ...
... PROFESSIONAL CONSULTING SERVICES AS EXPERT MEDICAL PHYSICIST: Since January of 2006, I have participated in numerous professional activities as an Expert Medical Physicist (EMP) performing various requested tasks. Those include but not limited to litigation cases, error assessment on ongoing litigat ...
Multicast Routing Algorithms
... less memory O(NG) but you may get suboptimal paths from source to all receivers, may introduce extra delay ...
... less memory O(NG) but you may get suboptimal paths from source to all receivers, may introduce extra delay ...
Image Guided Radiation Therapy: A Refresher
... i reduction d i for f most RT treatments. … facilitate implementation of new RT techniques (eg, (eg liver and lung SBRT) and in selected sites reduce toxicity and improve local control. The whole chain of interventions in the RT process should be prospectively assessed. This is particularly importan ...
... i reduction d i for f most RT treatments. … facilitate implementation of new RT techniques (eg, (eg liver and lung SBRT) and in selected sites reduce toxicity and improve local control. The whole chain of interventions in the RT process should be prospectively assessed. This is particularly importan ...
Article in PDF
... makes radiological assessment in discriminating tumor recurrence from the inflammatory or necrotic change due to treatment with radiation and/or chemotherapy. Both of these entities typically demonstrate contrast enhancement and therefore to differentiate recurrent tumor from a treatmentrelated chan ...
... makes radiological assessment in discriminating tumor recurrence from the inflammatory or necrotic change due to treatment with radiation and/or chemotherapy. Both of these entities typically demonstrate contrast enhancement and therefore to differentiate recurrent tumor from a treatmentrelated chan ...
Tomography
... The number of detectors used in third-generation scanners was increased substantially (to more than 800 detectors), and the angle of the fan beam was increased so that the detector array formed an arc wide enough to allow the x-ray beam to interrogate the entire patient. ...
... The number of detectors used in third-generation scanners was increased substantially (to more than 800 detectors), and the angle of the fan beam was increased so that the detector array formed an arc wide enough to allow the x-ray beam to interrogate the entire patient. ...
A Method to Measure the Detective Quantum Efficiency of
... of the imaging procedure outweigh the costs in terms of biological risk. The principle of ALARA (As Low As Reasonably Achievable) is observed for imaging procedures [3] and requires that patient equivalent dose be minimized as much as possible without compromising necessary diagnostic benefits of th ...
... of the imaging procedure outweigh the costs in terms of biological risk. The principle of ALARA (As Low As Reasonably Achievable) is observed for imaging procedures [3] and requires that patient equivalent dose be minimized as much as possible without compromising necessary diagnostic benefits of th ...
Frequently Asked Questions About Clinical Dose Optimization
... that come up along the way. Similarly, an experienced medical physicist must interpret information from the dose monitoring program and guide dose optimization efforts along an appropriate course of action. For this reason, the CDOS is an essential component in creating an imaging program that cons ...
... that come up along the way. Similarly, an experienced medical physicist must interpret information from the dose monitoring program and guide dose optimization efforts along an appropriate course of action. For this reason, the CDOS is an essential component in creating an imaging program that cons ...
ICRP Publication 105
... All data concerning the dose received by people approaching patients after implantation have been reviewed. Those doses have been either been measured directly or calculated. The available data show that, in the vast majority of cases, the dose to comforters and carers remains well below the recomme ...
... All data concerning the dose received by people approaching patients after implantation have been reviewed. Those doses have been either been measured directly or calculated. The available data show that, in the vast majority of cases, the dose to comforters and carers remains well below the recomme ...
X-ray Performance Evaluation of the Dexela CMOS APS X
... of optical photons can be lost in the demagnification stage. Moreover, CCDs are serial devices, i.e., the entire signal needs to pass through the same sense node before being read out. This leads to high read noise at high frame rates, limiting the use of CCDs in applications such as computed tomogr ...
... of optical photons can be lost in the demagnification stage. Moreover, CCDs are serial devices, i.e., the entire signal needs to pass through the same sense node before being read out. This leads to high read noise at high frame rates, limiting the use of CCDs in applications such as computed tomogr ...
CliniCal PRiVilEGE WHiTE PaPER
... Radiologic technologists may seek specialized training in a specific type of diagnostic imaging, such as: ➤➤ Ultrasound ➤➤ CT ➤➤ Mammography ➤➤ MRI ➤➤ Nuclear medicine ➤➤ Cardiovascular interventional radiology ➤➤ Bone densitometry Radiologic technologists may complete one of several educational pat ...
... Radiologic technologists may seek specialized training in a specific type of diagnostic imaging, such as: ➤➤ Ultrasound ➤➤ CT ➤➤ Mammography ➤➤ MRI ➤➤ Nuclear medicine ➤➤ Cardiovascular interventional radiology ➤➤ Bone densitometry Radiologic technologists may complete one of several educational pat ...
Verification of high energy photon photonuclear reactions
... et al. 1996; Enghardt et al. 1999). Today, clinical PET systems for both off-line and on-beam positron emitter imaging of range control and therapy monitoring verification after proton and carbon ion therapy are established at Hyogo Ion Beam Medical Center of Hyogo, Japan (Hishikawa et al. 2002), th ...
... et al. 1996; Enghardt et al. 1999). Today, clinical PET systems for both off-line and on-beam positron emitter imaging of range control and therapy monitoring verification after proton and carbon ion therapy are established at Hyogo Ion Beam Medical Center of Hyogo, Japan (Hishikawa et al. 2002), th ...
Has Transit Dosimetry Come Of Age
... ...during the last few years rather intensive efforts have led to the development of techniques that produce images using high-energy high X- rays directly. As a result, electronic portal imaging devices (EPIDs) are becoming available to cancer radiotherapy. In some systems, a small fraction of the ...
... ...during the last few years rather intensive efforts have led to the development of techniques that produce images using high-energy high X- rays directly. As a result, electronic portal imaging devices (EPIDs) are becoming available to cancer radiotherapy. In some systems, a small fraction of the ...
communicating radiation risks in paediatric imaging
... Advancing imaging technology has opened new horizons for clinical diagnostics and has greatly improved patient care. As a result, the use of medical imaging has increased rapidly worldwide during the past several decades and the spectrum of its applications in paediatric health care has expanded. Pa ...
... Advancing imaging technology has opened new horizons for clinical diagnostics and has greatly improved patient care. As a result, the use of medical imaging has increased rapidly worldwide during the past several decades and the spectrum of its applications in paediatric health care has expanded. Pa ...
Techniques and Applications of Automatic Tube Current Modulation
... Nevertheless, the introduction of ATCM techniques in modern CT scanners represents an important step toward standardization of tube current protocols, with elimination of arbitrary selection by radiologists and technologists. This article will describe the principles of ATCM techniques, their clinic ...
... Nevertheless, the introduction of ATCM techniques in modern CT scanners represents an important step toward standardization of tube current protocols, with elimination of arbitrary selection by radiologists and technologists. This article will describe the principles of ATCM techniques, their clinic ...
Dose issues on multi-slice CT scanners
... Multi-slice or multi-detector row CT scanners, capable of imaging four simultaneous, parallel slices in a single rotation, were first introduced in 1998. Since then, scanners with 6, 8, 10 and 16 slice capabilities have become available and have made a marked impact on the role of CT in the diagnost ...
... Multi-slice or multi-detector row CT scanners, capable of imaging four simultaneous, parallel slices in a single rotation, were first introduced in 1998. Since then, scanners with 6, 8, 10 and 16 slice capabilities have become available and have made a marked impact on the role of CT in the diagnost ...
brain tumor target volume determination for radiation treatment
... the outlining process was measured and recorded as part of this study. All contours, including CT data and MRI transformation files, were copied to a UNIX research network to provide the basis for comparison with the segmentations prepared by the automated expert systems. The expertise of each radia ...
... the outlining process was measured and recorded as part of this study. All contours, including CT data and MRI transformation files, were copied to a UNIX research network to provide the basis for comparison with the segmentations prepared by the automated expert systems. The expertise of each radia ...
Diagnostic Imaging Quality Assurance
... pressure, and frame are stored in nonvolatile memory before automatic turnoff; eliminates manual re-selection at power-up Bias voltage supply Fixed electronic bias (~ 300 V) Bias voltage is removed from triaxial input connector at instrument turnoff Customization Allows user to modify contents of no ...
... pressure, and frame are stored in nonvolatile memory before automatic turnoff; eliminates manual re-selection at power-up Bias voltage supply Fixed electronic bias (~ 300 V) Bias voltage is removed from triaxial input connector at instrument turnoff Customization Allows user to modify contents of no ...
Quality Assurance (QA) for Kilovoltage Cone Beam
... containing several modules with geometrical structures to test variousimage quality parameters. Currently, both manufacturers of kV CBCT systems provide a version of the phantom with the CBCT system. The Catphan phantom is setup on the treatment couch of the linac system. It hangs from its wooden bo ...
... containing several modules with geometrical structures to test variousimage quality parameters. Currently, both manufacturers of kV CBCT systems provide a version of the phantom with the CBCT system. The Catphan phantom is setup on the treatment couch of the linac system. It hangs from its wooden bo ...
Controlling exposure to ionising radiation in the medical imaging
... The first appraisal of ASN's inspections in interventional radiology, based on those carried out in 2009, reveals disparities in the implementation of radiation protection in healthcare establishments and in services practising radioguided interventions. It shows that radiation protection is better ...
... The first appraisal of ASN's inspections in interventional radiology, based on those carried out in 2009, reveals disparities in the implementation of radiation protection in healthcare establishments and in services practising radioguided interventions. It shows that radiation protection is better ...
The art of medical imaging
... The cathode rays converged into one point on the glass wall, which resulted in a much sharper image. However, the localized heat load on the glass built up tremendously, which shattered a number of tubes. The next logical step, taken shortly thereafter, was to place a platinum anticathode in the tub ...
... The cathode rays converged into one point on the glass wall, which resulted in a much sharper image. However, the localized heat load on the glass built up tremendously, which shattered a number of tubes. The next logical step, taken shortly thereafter, was to place a platinum anticathode in the tub ...