Document
... spatial resolution is 1 lp/mm • typically resolution in CT scanning ranges from 0.5 to 1.5 lp/mm • the axial resolution may be improved by operating in a high resolution mode using a smaller FOV or a larger matrix size • factors that may also improve CT spatial resolution by reducing image blur incl ...
... spatial resolution is 1 lp/mm • typically resolution in CT scanning ranges from 0.5 to 1.5 lp/mm • the axial resolution may be improved by operating in a high resolution mode using a smaller FOV or a larger matrix size • factors that may also improve CT spatial resolution by reducing image blur incl ...
Intervention Research, Council on Clinical Cardiology, and Council
... to enhancing radiation safety in cardiovascular imaging: a scientific statement from the American Heart Association. Circulation. 2014;130: •••–•••. Expert peer review of AHA Scientific Statements is conducted by the AHA Office of Science Operations. For more on AHA statements and guidelines develop ...
... to enhancing radiation safety in cardiovascular imaging: a scientific statement from the American Heart Association. Circulation. 2014;130: •••–•••. Expert peer review of AHA Scientific Statements is conducted by the AHA Office of Science Operations. For more on AHA statements and guidelines develop ...
Review of X-ray Detectors for Medical Imaging
... C CCDs for very high spatial resolution C Organic semiconductors C Fast volume CT scanners C Energy-resolved methods C Quanta-counting detection C Monochromatic X-ray imaging C Phase contrast imaging C Terahertz imaging Innovations Future Concepts X-ray Reconstruction & Algorithms Martin Hoheisel Vo ...
... C CCDs for very high spatial resolution C Organic semiconductors C Fast volume CT scanners C Energy-resolved methods C Quanta-counting detection C Monochromatic X-ray imaging C Phase contrast imaging C Terahertz imaging Innovations Future Concepts X-ray Reconstruction & Algorithms Martin Hoheisel Vo ...
18F FDG PET/CT Evaluation of Patients with Ovarian Carcinoma
... The results in our study showed a lower sensitivity of 81% for lesions in the pelvis compared to 96% for disease in other sites. This difference is likely due to post-surgical and post-treatment induced inflammatory uptake within the pelvis. This hypothesis is supported by a study (32) showing that ...
... The results in our study showed a lower sensitivity of 81% for lesions in the pelvis compared to 96% for disease in other sites. This difference is likely due to post-surgical and post-treatment induced inflammatory uptake within the pelvis. This hypothesis is supported by a study (32) showing that ...
Walter et al. (2007) Radiotherapy and Oncology 85
... values are higher than in [27], as we used more MU for one MV-image in this study. These values can be easily scaled for modern EPID-systems, using our estimate of approximately 1.3 mGy/MU. At our department, EPID imaging in the pelvis is routinely done with 5 MU, resulting in a total dose of approx ...
... values are higher than in [27], as we used more MU for one MV-image in this study. These values can be easily scaled for modern EPID-systems, using our estimate of approximately 1.3 mGy/MU. At our department, EPID imaging in the pelvis is routinely done with 5 MU, resulting in a total dose of approx ...
Original articles Validation of anatomical standardization of FDG
... In a methodological study, use of a single scanner is usually preferable. The present study, however, used two different scanners because many investigators currently use them together with SPM or NEUROSTAT [5, 9] and we did not want the results to be applicable only to a specific scanner. In fact, ...
... In a methodological study, use of a single scanner is usually preferable. The present study, however, used two different scanners because many investigators currently use them together with SPM or NEUROSTAT [5, 9] and we did not want the results to be applicable only to a specific scanner. In fact, ...
A Guide to Common Diagnostic Radiology Procedures
... structure/part of the body to be visualized one to eight slices at a time, creating 2 and 3 dimensional images made in seconds, which appear on a TV monitor outside the room. Scanning can be done on any part of the body. Abnormal findings can reveal tumors, nodules, cysts, enlarged lymph nodes, and ...
... structure/part of the body to be visualized one to eight slices at a time, creating 2 and 3 dimensional images made in seconds, which appear on a TV monitor outside the room. Scanning can be done on any part of the body. Abnormal findings can reveal tumors, nodules, cysts, enlarged lymph nodes, and ...
Imaging doses from the Elekta Synergy X
... importantly, the image sequence from rotation fluoroscopy can be used in filtered backprojection to reconstruct an X-ray volumetric image [1] . This form of cone beam computed tomography (CBCT) propels IGRT forward into a genuinely three dimensional (3D) technique and consequently has the potential ...
... importantly, the image sequence from rotation fluoroscopy can be used in filtered backprojection to reconstruct an X-ray volumetric image [1] . This form of cone beam computed tomography (CBCT) propels IGRT forward into a genuinely three dimensional (3D) technique and consequently has the potential ...
Image-guided radiation therapy (IGRT): practical
... Cone beam computed tomography (CBCT) is the most widespread three-dimensional IGRT system. It utilizes an X-ray tube source. The X-ray source and a flat panel detector are mounted on the gantry of the linear accelerator; it is not only possible to acquire planar images, but also multiple projections ...
... Cone beam computed tomography (CBCT) is the most widespread three-dimensional IGRT system. It utilizes an X-ray tube source. The X-ray source and a flat panel detector are mounted on the gantry of the linear accelerator; it is not only possible to acquire planar images, but also multiple projections ...
Webb, Ch.2s5
... to patient dose and not to image contrast, and it is important that they be removed from the x-ray beam before it reaches the patient. This can be achieved by the use of aluminium or copper filters, depending on the tube potential. The choice of the tube potential and filtration most appropriate to ...
... to patient dose and not to image contrast, and it is important that they be removed from the x-ray beam before it reaches the patient. This can be achieved by the use of aluminium or copper filters, depending on the tube potential. The choice of the tube potential and filtration most appropriate to ...
Acceptance testing for nuclear medicine instrumentation
... provide reference data that the user can refer to during the whole life of the system. In addition to acceptance tests that verify specifications, additional tests are usually required at acceptance in order to more thoroughly test individual components of an instrument, and these are referred to he ...
... provide reference data that the user can refer to during the whole life of the system. In addition to acceptance tests that verify specifications, additional tests are usually required at acceptance in order to more thoroughly test individual components of an instrument, and these are referred to he ...
Physics of PET - University of Washington
... a dedicated transmission scan or from CT information. This allows extraction of accurate information from PET images. Only minute amounts of imaging substrate need to be injected (tracer principle) because of the high sensitivity of PET. In addition, positron emitting isotopes that are used in medic ...
... a dedicated transmission scan or from CT information. This allows extraction of accurate information from PET images. Only minute amounts of imaging substrate need to be injected (tracer principle) because of the high sensitivity of PET. In addition, positron emitting isotopes that are used in medic ...
bushnellbaum 2011 endocrinol metab clin north
... MIBG was labeled with I-131 for imaging, and subsequently therapy of pheochromocytoma. Over time its utility has been expanded to other NETs. The imaging properties of I-123 are notably superior to I-131, and clinical comparison studies make it clear that I-123 MIBG should be used in place of I-131 ...
... MIBG was labeled with I-131 for imaging, and subsequently therapy of pheochromocytoma. Over time its utility has been expanded to other NETs. The imaging properties of I-123 are notably superior to I-131, and clinical comparison studies make it clear that I-123 MIBG should be used in place of I-131 ...
AIDR 3D - Toshiba Medical Systems Europe
... Exposure 3D is fully integrated into the imaging chain and can therefore calculate the minimum radiation exposure required for each examination in every patient. With the inclusion of AIDR 3D in the scan protocol, the calculated exposure is automatically reduced by up to 75% when compared to a scan ...
... Exposure 3D is fully integrated into the imaging chain and can therefore calculate the minimum radiation exposure required for each examination in every patient. With the inclusion of AIDR 3D in the scan protocol, the calculated exposure is automatically reduced by up to 75% when compared to a scan ...
MR Imaging of Acute Experimental Ischemia in Cats
... others unreliable. The measurements of relaxation values showed a 12%-42% prolongation of T1 in the ischemic gray matter compared to the control gray-matter values (T1 = 726; range, 696-754 msec) in the opposite hemisphere. The T2 values of the lesions were 6%-24% longer as compared to normal (T2 = ...
... others unreliable. The measurements of relaxation values showed a 12%-42% prolongation of T1 in the ischemic gray matter compared to the control gray-matter values (T1 = 726; range, 696-754 msec) in the opposite hemisphere. The T2 values of the lesions were 6%-24% longer as compared to normal (T2 = ...
Course Syllabus - Idaho State University
... university faculty or staff without permission. Plagiarism includes, but is not limited to, the use of, by paraphrase or direct quotation without correct recognition, the published or unpublished works of another person. The use of materials generated by agencies engaged in "selling" term papers is ...
... university faculty or staff without permission. Plagiarism includes, but is not limited to, the use of, by paraphrase or direct quotation without correct recognition, the published or unpublished works of another person. The use of materials generated by agencies engaged in "selling" term papers is ...
DoseWatch - GE Healthcare
... view of dose, acquisition technique, use of mA modulation and patient centering. For many systems DoseWatch can even recalculate missing metrics such as CTDIvol and DLP. With make, model and software version specific dose calculators, coupled with the ability to link directly to an imaging device, D ...
... view of dose, acquisition technique, use of mA modulation and patient centering. For many systems DoseWatch can even recalculate missing metrics such as CTDIvol and DLP. With make, model and software version specific dose calculators, coupled with the ability to link directly to an imaging device, D ...
Applications of Cone Beam Computed Tomography in
... 3-dimensional imaging in orthodontics and orthognathic surgery, with a major concern being the correlation between soft tissue and hard tissue changes.15 For decades, lateral cephalography has been the standard modality for diagnosing skeletal and dental deformities, as well as for use in surgical p ...
... 3-dimensional imaging in orthodontics and orthognathic surgery, with a major concern being the correlation between soft tissue and hard tissue changes.15 For decades, lateral cephalography has been the standard modality for diagnosing skeletal and dental deformities, as well as for use in surgical p ...
14727-Diagnostic Radiology A_100715.indd
... truly determines the rest of your life. It is an important decision that all of us at SingHealth Radiology Residency would like to help you with. As a Radiologist, I know that I am on to a good thing when other specialties show more than just keen interest in my discipline. Radiology, both Diagnosti ...
... truly determines the rest of your life. It is an important decision that all of us at SingHealth Radiology Residency would like to help you with. As a Radiologist, I know that I am on to a good thing when other specialties show more than just keen interest in my discipline. Radiology, both Diagnosti ...
Update Course in Diagnostic Diagnostic Radiology Radiology
... photon-counting energy-discriminating detectors & sandwich detectors ...
... photon-counting energy-discriminating detectors & sandwich detectors ...
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.