Adaptive Iterative Reconstruction in CT: What Does It
... One might make different assumptions about scanner geometry, scanner optics, and noise statistics which are computationally more complex and combine these with multiple iterations of reconstruction — termed statistical iterative reconstruction. Such statistical iterative reconstruction may result in ...
... One might make different assumptions about scanner geometry, scanner optics, and noise statistics which are computationally more complex and combine these with multiple iterations of reconstruction — termed statistical iterative reconstruction. Such statistical iterative reconstruction may result in ...
design and implementation of an anthropomorphic quality
... scanning bed to eliminate interference-pattern artifacts found with use of the standard polished glass scanning bed. A mask was created for the scanning bed to exclude light contamination. This film-scanning system is based on the technique used by Dempsey et al. (10). Films were scanned at least 36 ...
... scanning bed to eliminate interference-pattern artifacts found with use of the standard polished glass scanning bed. A mask was created for the scanning bed to exclude light contamination. This film-scanning system is based on the technique used by Dempsey et al. (10). Films were scanned at least 36 ...
Radiation Protection 109
... After the DRLs have been established, the patient dose either in standard phantoms or groups of standard-sized patients should be assessed on equipment in every room of every radiological facility periodically, with the long-term aim of annual assessments, and after every major change or servic ...
... After the DRLs have been established, the patient dose either in standard phantoms or groups of standard-sized patients should be assessed on equipment in every room of every radiological facility periodically, with the long-term aim of annual assessments, and after every major change or servic ...
Inside Biograph TruePoint PET•CT
... modulation of the X-ray tube current according to the precise shape of the patient’s body during both spiral and sequential scanning. It reduces the patient dose for low attenuation views, while the dose is kept at a nominally higher mA for high attenuation angles. From the initial topogram, a base ...
... modulation of the X-ray tube current according to the precise shape of the patient’s body during both spiral and sequential scanning. It reduces the patient dose for low attenuation views, while the dose is kept at a nominally higher mA for high attenuation angles. From the initial topogram, a base ...
Estimativa de dose nos pulmões para procedimentos
... Figure 4 – (a). Siemens’s Straton X-ray tube and (b). Its schematics, showing the anode directly attached to the tube envelope (source: Siemens Healthcare GmbH, 2015, adapted). ........................ 29 Figure 5 – Detector arrays in modern computed tomography, in a perspective and side view. The s ...
... Figure 4 – (a). Siemens’s Straton X-ray tube and (b). Its schematics, showing the anode directly attached to the tube envelope (source: Siemens Healthcare GmbH, 2015, adapted). ........................ 29 Figure 5 – Detector arrays in modern computed tomography, in a perspective and side view. The s ...
Conceptual Amendment to SB 219 General 1
... b. Registers the Division before performing mammography. 27. NRS 457.184 will now additionally prohibit the owner, lessee or other responsible person from allowing a radiation machine to be operated for mammography by a person who does not meet the requirements of item 25 or 26. Radiologic Imaging ...
... b. Registers the Division before performing mammography. 27. NRS 457.184 will now additionally prohibit the owner, lessee or other responsible person from allowing a radiation machine to be operated for mammography by a person who does not meet the requirements of item 25 or 26. Radiologic Imaging ...
Thallous Chloride TI 201 Injection
... maximum stress which is sustained for approximately 30 seconds after injection. Begin imaging within ten minutes after administration to obtain maximum target-to-background ratios. Within two hours after the completion of the stress testing the target-tobackground ratios may decrease in lesions that ...
... maximum stress which is sustained for approximately 30 seconds after injection. Begin imaging within ten minutes after administration to obtain maximum target-to-background ratios. Within two hours after the completion of the stress testing the target-tobackground ratios may decrease in lesions that ...
Philips SPECT/CT Systems
... •No compromise to SPECT functions •X-ray CT and SPECT are in coplanar for cardiac imaging •Reconstruction with GPU for faster processing speed ...
... •No compromise to SPECT functions •X-ray CT and SPECT are in coplanar for cardiac imaging •Reconstruction with GPU for faster processing speed ...
ACR-SPR Practice Parameter for the Performance of Computed
... A. In general, a CT examination of the abdomen includes transaxial images from just above the dome of the diaphragm to the upper margin of the sacroiliac joints with a 5-mm or less slice thickness. A CT of the pelvis extends from the iliac crest through just below the ischial tuberosities with a 5-m ...
... A. In general, a CT examination of the abdomen includes transaxial images from just above the dome of the diaphragm to the upper margin of the sacroiliac joints with a 5-mm or less slice thickness. A CT of the pelvis extends from the iliac crest through just below the ischial tuberosities with a 5-m ...
our Thin Membranes Data Sheet
... Microbeam sychrotron x-ray fluorescence (S-XRF) can quantify a wide range of trace elements present in samples of minute volume. CVD diamond substrates capable of meeting the need for a thin (~1 µm thick), highly pure, low atomic number substrate are ideal for this work. Diamond substrates have alre ...
... Microbeam sychrotron x-ray fluorescence (S-XRF) can quantify a wide range of trace elements present in samples of minute volume. CVD diamond substrates capable of meeting the need for a thin (~1 µm thick), highly pure, low atomic number substrate are ideal for this work. Diamond substrates have alre ...
Chapter 23 Technological methods of medical diagnosis
... the junction between fat and liver with the percentage of ultrasound reflected at the junction between liver and fat. 11. A pregnant woman needs to have a bladder full of urine if she wishes to have a successful ultrasound of her baby. Explain why an empty bladder would make an ultrasound ...
... the junction between fat and liver with the percentage of ultrasound reflected at the junction between liver and fat. 11. A pregnant woman needs to have a bladder full of urine if she wishes to have a successful ultrasound of her baby. Explain why an empty bladder would make an ultrasound ...
BIOMEDICAL IMAGING MODALITIES: A TUTORIAL Raj Acharya
... stereotactic surgery planning and many other diagnostic applications (3). Physicians have long utilized x-ray based imaging systems for non-invasive medical diagnostics. In the ...
... stereotactic surgery planning and many other diagnostic applications (3). Physicians have long utilized x-ray based imaging systems for non-invasive medical diagnostics. In the ...
Notes on Computerized Tomography
... referred to as short-term effects. The signs and symptoms of these effects include nausea, vomiting, malaise, and ultimately fever, shock and possible death. These effects are collectively known as the acute radiation syndrome. In diagnostic radiation, long-term and subtler effects caused by low dos ...
... referred to as short-term effects. The signs and symptoms of these effects include nausea, vomiting, malaise, and ultimately fever, shock and possible death. These effects are collectively known as the acute radiation syndrome. In diagnostic radiation, long-term and subtler effects caused by low dos ...
Fiducial Markers in Image-guided Radiotherapy
... Fiducial markers are emerging as a standard tool for image-guided radiotherapy (IGRT). The markers are implantable devices designed to act as reliable surrogates for imaging anatomic structures of interest. Fiducial marker techniques were originally developed in the preconformal radiotherapy era for ...
... Fiducial markers are emerging as a standard tool for image-guided radiotherapy (IGRT). The markers are implantable devices designed to act as reliable surrogates for imaging anatomic structures of interest. Fiducial marker techniques were originally developed in the preconformal radiotherapy era for ...
Test Equipment for Radiology and CT Quality Control
... which can be fully seen, and the smallest group of lines which can be discerned. Use the tables which come with TOR 18FG to determine the contrast threshold for the 8 mm objects and the spatial resolution. ...
... which can be fully seen, and the smallest group of lines which can be discerned. Use the tables which come with TOR 18FG to determine the contrast threshold for the 8 mm objects and the spatial resolution. ...
File Ref.No.38933/GA - IV - J2/2013/CU UNIVERSITY OF CALICUT
... Teaching Departments of the University with effect from 2008 admissions, as per paper read as (1) above. The Regulations Scheme and Syllabus of MSc programme in Radiation Physics was implemented as per paper read as (2) The Board of Studies in Radiation Physics, vide paper read as (3), resolved to a ...
... Teaching Departments of the University with effect from 2008 admissions, as per paper read as (1) above. The Regulations Scheme and Syllabus of MSc programme in Radiation Physics was implemented as per paper read as (2) The Board of Studies in Radiation Physics, vide paper read as (3), resolved to a ...
CARDIAC CATHETERIZATION EQUIPMENT PERFORMANCE AAPM REPORT NO. 70 Report of Task Group #17
... focal spots. The small spot will have a nominal size of 0.5 to 0.6 mm with a kW rating for a single exposure of 40 to 50 kW. The large focal spot will be 0.9 to 1.2 mm in size with a kW rating of 80 to 110 kW. The large focal spot kW rating should be reasonably matched to the maximum kW of the gener ...
... focal spots. The small spot will have a nominal size of 0.5 to 0.6 mm with a kW rating for a single exposure of 40 to 50 kW. The large focal spot will be 0.9 to 1.2 mm in size with a kW rating of 80 to 110 kW. The large focal spot kW rating should be reasonably matched to the maximum kW of the gener ...
The Effects of Organ-based Tube Current Modulation on Radiation
... [1], accounting for an increase by 23 times in the last three decades [2]. Recent advances in CT, including better image quality and reduced acquisition time, have facilitated an exponential growth in its clinical use over the past few years [3]. However, the Food and Drug Administration (FDA) estim ...
... [1], accounting for an increase by 23 times in the last three decades [2]. Recent advances in CT, including better image quality and reduced acquisition time, have facilitated an exponential growth in its clinical use over the past few years [3]. However, the Food and Drug Administration (FDA) estim ...
Commissioning of linear accelerators: From acceptance to first
... Phys 37: 2010)…..Algorithms accounting for 3D scatter (e.g. convolution/superposition, Monte Carlo) perform adequately in most situations, including (in many cases) under circumstances where there is a loss of e’ equilibrium such as lung/tissue interface or tumor margin in lung medium. Pencil beam a ...
... Phys 37: 2010)…..Algorithms accounting for 3D scatter (e.g. convolution/superposition, Monte Carlo) perform adequately in most situations, including (in many cases) under circumstances where there is a loss of e’ equilibrium such as lung/tissue interface or tumor margin in lung medium. Pencil beam a ...
32 to 64 slice CT scanner comparison report version 12
... The Device Evaluation Service (DES) aims to provide independent and objective evaluations of medical devices available on the UK market. Specialist centres, mainly in NHS Trusts, do the evaluations under long term contract to, and in accordance with protocols approved by, the Medicines and Healthcar ...
... The Device Evaluation Service (DES) aims to provide independent and objective evaluations of medical devices available on the UK market. Specialist centres, mainly in NHS Trusts, do the evaluations under long term contract to, and in accordance with protocols approved by, the Medicines and Healthcar ...
Quality assurance for computed-tomography simulators and the
... 共Quality assurance for clinical radiotherapy treatment planning兲. The aim of the current task group was not to duplicate material presented in the other two reports, but to develop a set of QA guidelines specific to CT-simulation, and to complement the recommendations presented in the other two repo ...
... 共Quality assurance for clinical radiotherapy treatment planning兲. The aim of the current task group was not to duplicate material presented in the other two reports, but to develop a set of QA guidelines specific to CT-simulation, and to complement the recommendations presented in the other two repo ...
Optimization of image acquisition techniques for dual
... Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada M5G 2M9 and Ontario Cancer Institute, Princess Margaret Hospital, Toronto, Ontario, Canada M5G 2M9 ...
... Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada M5G 2M9 and Ontario Cancer Institute, Princess Margaret Hospital, Toronto, Ontario, Canada M5G 2M9 ...
Cone-beam computed tomography with a flat
... lowance of FPI-CBCT imaging without lateral truncation of the projection data; 共2兲 composition approximating water; and 共3兲 variation in phantom thickness across a range similar to that of human anatomy. As illustrated in Fig. 1, the phantom consisted of a water-filled cylinder 共11 cm diameter兲 surr ...
... lowance of FPI-CBCT imaging without lateral truncation of the projection data; 共2兲 composition approximating water; and 共3兲 variation in phantom thickness across a range similar to that of human anatomy. As illustrated in Fig. 1, the phantom consisted of a water-filled cylinder 共11 cm diameter兲 surr ...
The University of Edinburgh
... Dr Farrall came to the Division of Clinical Neurosciences in 2002 from Canada, where he trained as a Radiologist in Halifax, Nova Scotia. He obtained an MD in 1997 from the University of Calgary in Alberta, an MSc in 1995 from the University of Western Ontario in London, Ontario, and a BSc (Hons) fr ...
... Dr Farrall came to the Division of Clinical Neurosciences in 2002 from Canada, where he trained as a Radiologist in Halifax, Nova Scotia. He obtained an MD in 1997 from the University of Calgary in Alberta, an MSc in 1995 from the University of Western Ontario in London, Ontario, and a BSc (Hons) fr ...
The Abdominal X-Ray
... 5. Check exposure. If the spine is visible most structures to be seen will be visible. 6. Artefacts may be immediately obvious. Piercing of the umbilicus is very popular, especially in young women but genital piercing is not infrequent. Metallic objects are obvious. There may be clips or materials ...
... 5. Check exposure. If the spine is visible most structures to be seen will be visible. 6. Artefacts may be immediately obvious. Piercing of the umbilicus is very popular, especially in young women but genital piercing is not infrequent. Metallic objects are obvious. There may be clips or materials ...
Backscatter X-ray
Backscatter X-ray is an advanced X-ray imaging technology. Traditional X-ray machines detect hard and soft materials by the variation in transmission through the target. In contrast, backscatter X-ray detects the radiation that reflects from the target. It has potential applications where less-destructive examination is required, and can be used if only one side of the target is available for examination.The technology is one of two types of whole body imaging technologies that have been used to perform full-body scans of airline passengers to detect hidden weapons, tools, liquids, narcotics, currency, and other contraband. A competing technology is millimeter wave scanner. An airport security machine of this type is also referred to as ""body scanner"", ""whole body imager (WBI)"", ""security scanner"", and ""naked scanner"".