Physical Principles and Technology of Clinical PET Imaging
... coincidences (Fig. 2b) are a consequence of 2 unrelated annihilation photons arriving within the time window used to define a coincidence. The random coincidence rate increases linearly with the width of the time window and quadratically with the rate of single photons interacting in the detectors. ...
... coincidences (Fig. 2b) are a consequence of 2 unrelated annihilation photons arriving within the time window used to define a coincidence. The random coincidence rate increases linearly with the width of the time window and quadratically with the rate of single photons interacting in the detectors. ...
Profile: DCEMRI Quantification - QIBA Wiki
... manufacturers, image analysis laboratories, biopharmaceutical industry, academia, government research organizations, and professional societies, among others. All work is classified as precompetitive. The goal of the DCE-MRI committee is to define basic standards for DCE-MRI measurements and quality ...
... manufacturers, image analysis laboratories, biopharmaceutical industry, academia, government research organizations, and professional societies, among others. All work is classified as precompetitive. The goal of the DCE-MRI committee is to define basic standards for DCE-MRI measurements and quality ...
PET/CT Imaging Artifacts - Society of Nuclear Medicine
... single scanning session, allowing excellent fusion of the PET and CT images and thus improving lesion localization and interpretation accuracy. Moreover, the CT data can also be used for attenuation correction, ultimately leading to high patient throughput. These combined advantages have rendered PE ...
... single scanning session, allowing excellent fusion of the PET and CT images and thus improving lesion localization and interpretation accuracy. Moreover, the CT data can also be used for attenuation correction, ultimately leading to high patient throughput. These combined advantages have rendered PE ...
Uterine Artery Embolization: Optimization with Preprocedural
... myomectomy (1–5). During the past decade, UAE has been established as a safe and effective first-line therapy for the treatment of symptomatic fibroids in premenopausal women (6–10). Almost all patients who undergo UAE procedures are women of childbearing age, and because UAE requires fluoroscopic a ...
... myomectomy (1–5). During the past decade, UAE has been established as a safe and effective first-line therapy for the treatment of symptomatic fibroids in premenopausal women (6–10). Almost all patients who undergo UAE procedures are women of childbearing age, and because UAE requires fluoroscopic a ...
article in press - The EndoExperience
... The following CBCTs were evaluated for radiation dose levels: Accuitomo 3D® (J. Morita Corporation, Kyoto, Japan), NewTom 3G® (Quantitative Radiology, Verona, Italy), and iCAT® (Imaging Sciences International, Hatfield, Pennsylvania, USA) (Table 1). The Accuitomo 3D® used in the present study works ...
... The following CBCTs were evaluated for radiation dose levels: Accuitomo 3D® (J. Morita Corporation, Kyoto, Japan), NewTom 3G® (Quantitative Radiology, Verona, Italy), and iCAT® (Imaging Sciences International, Hatfield, Pennsylvania, USA) (Table 1). The Accuitomo 3D® used in the present study works ...
Radiation protection for X-Ray systems _ed2
... considerable thickness and they can expose photographic films. Their short wavelength allows for high resolution imaging if appropriate optical components are available. However there are differences in penetration through different materials due to the differences in the material densities. X-rays ...
... considerable thickness and they can expose photographic films. Their short wavelength allows for high resolution imaging if appropriate optical components are available. However there are differences in penetration through different materials due to the differences in the material densities. X-rays ...
x-ray safety manual - Winnipeg Regional Health Authority
... radiation exposures to ensure that all exposures are justified; that any necessary exposures are kept as low as is reasonably achievable (ALARA); that the doses received do not exceed certain specified limits; and that allowance is made for future developments. The technologies of x-ray imaging have ...
... radiation exposures to ensure that all exposures are justified; that any necessary exposures are kept as low as is reasonably achievable (ALARA); that the doses received do not exceed certain specified limits; and that allowance is made for future developments. The technologies of x-ray imaging have ...
2 Quality Control of a Simulator
... • For IGRT, it is crucial that the MV beam and the KV beam share the same isocenter. During gantry rotation the x-ray tube and imager may sag or flex. It is necessary to correct for this by use of a “flexmap” which characterizes the flex with gantry angle. • CBCT images can be compared to the treatm ...
... • For IGRT, it is crucial that the MV beam and the KV beam share the same isocenter. During gantry rotation the x-ray tube and imager may sag or flex. It is necessary to correct for this by use of a “flexmap” which characterizes the flex with gantry angle. • CBCT images can be compared to the treatm ...
Quality assurance for image-guided radiation therapy
... The MV-CBCT system demonstrates submillimeter localization precision23,58–60 and sufficient soft-tissue contrast to visualize structures such as the prostate. The dose used for MV-CBCT depends on the clinical application but typically ranges from 3 to 10 cGy,20,61 with the lower end used when daily ...
... The MV-CBCT system demonstrates submillimeter localization precision23,58–60 and sufficient soft-tissue contrast to visualize structures such as the prostate. The dose used for MV-CBCT depends on the clinical application but typically ranges from 3 to 10 cGy,20,61 with the lower end used when daily ...
quantitative nuclear medicine imaging: concepts
... medicine. Nevertheless, the apparent complexity and sometimes limited accuracy of these methods have prevented them from being widely used in important applications such as targeted radionuclide therapy or kinetic analysis. The intricacy of the effects degrading nuclear medicine images and the lack ...
... medicine. Nevertheless, the apparent complexity and sometimes limited accuracy of these methods have prevented them from being widely used in important applications such as targeted radionuclide therapy or kinetic analysis. The intricacy of the effects degrading nuclear medicine images and the lack ...
Strengthening the Provision of Quality Diagnostic Radiology Services
... or under the supervision of, a medical practitioner’ requirement was not an effective control at the time because there was no minimum qualification requirements for those people actually performing the diagnostic radiology services. This posed a quality and safety risk to patients, given that all d ...
... or under the supervision of, a medical practitioner’ requirement was not an effective control at the time because there was no minimum qualification requirements for those people actually performing the diagnostic radiology services. This posed a quality and safety risk to patients, given that all d ...
Cone beam computed tomography - Its applications
... plan, and prognostic value of various dental diseases ever since the invention of X-rays in 1895. Two-dimensional radiographs are the most commonly employed techniques in dentistry. These radiographic techniques suffer from magnification, distortions, superimpositions, and misrepresentation of struc ...
... plan, and prognostic value of various dental diseases ever since the invention of X-rays in 1895. Two-dimensional radiographs are the most commonly employed techniques in dentistry. These radiographic techniques suffer from magnification, distortions, superimpositions, and misrepresentation of struc ...
Do Now - Dublin City Schools
... CT scans in cross-section Can build up 3D model of body Instead of pixels (picture elements): voxels (volume elements) ...
... CT scans in cross-section Can build up 3D model of body Instead of pixels (picture elements): voxels (volume elements) ...
Nuclear medicine
Nuclear medicine is a medical specialty involving the application of radioactive substances in the diagnosis and treatment of disease. Nuclear medicine scans are usually conducted by radiographers. Nuclear medicine, in a sense, is ""radiology done inside out"" or ""endoradiology"" because it records radiation emitting from within the body rather than radiation that is generated by external sources like X-rays.