reduced radiation exposure and iodine load at low tube kilovoltage
... to minimize the risk of developing radiationinduced cancers during later life. There are several reviews that have recently been published on various tools that can be used to reduce patient exposure from CT [22–26] . The applicability of these low-dose tools is highly dependent on the patients’ cha ...
... to minimize the risk of developing radiationinduced cancers during later life. There are several reviews that have recently been published on various tools that can be used to reduce patient exposure from CT [22–26] . The applicability of these low-dose tools is highly dependent on the patients’ cha ...
01 - Use of a dDVH decomposition technique to evaluate
... Tom Depuydt, Yolande Lievens University Hospital Leuven Gasthuisberg The turn of the century brought the large-scale break through of 3D conformal and intensity modulated radiation therapy techniques in the clinical setting. During the 90’s, new technologies were introduced for high-resolution dose ...
... Tom Depuydt, Yolande Lievens University Hospital Leuven Gasthuisberg The turn of the century brought the large-scale break through of 3D conformal and intensity modulated radiation therapy techniques in the clinical setting. During the 90’s, new technologies were introduced for high-resolution dose ...
Simultaneous Two-Photon Calcium Imaging of Entire Cortical
... elaborate identification of cell types. As an alternative, two-photon calcium imaging has provided a complementary assay for monitoring activity in awake animals (albeit at lower time resolution) in large numbers of identified neurons across days and weeks (Trachtenberg et al., 2002; Dombeck et al., ...
... elaborate identification of cell types. As an alternative, two-photon calcium imaging has provided a complementary assay for monitoring activity in awake animals (albeit at lower time resolution) in large numbers of identified neurons across days and weeks (Trachtenberg et al., 2002; Dombeck et al., ...
VALUE OF REFORMATTED and three
... which include disc bulging and herniation, ligamentum flavum hypertrophy, facet joint hypertrophy, and spondylolisthesis (2, 17). In this study, the outline of the spinal canal was demonstrated very adequately on axial and sagittal MPRs. The lateral recess usually contains the descending nerve that ...
... which include disc bulging and herniation, ligamentum flavum hypertrophy, facet joint hypertrophy, and spondylolisthesis (2, 17). In this study, the outline of the spinal canal was demonstrated very adequately on axial and sagittal MPRs. The lateral recess usually contains the descending nerve that ...
Proceedings 6e Lustrum - Netherlands Commission on Radiation
... size, interchanged guide tubes, or afterloader malfunctions (IAEA 2000). Using a built-in dummy (i.e. non-active) check source, afterloader safety systems can detect certain dose-delivery errors (for example, mechanical obstruction of the source or improperly connected guide tubes). Some of these er ...
... size, interchanged guide tubes, or afterloader malfunctions (IAEA 2000). Using a built-in dummy (i.e. non-active) check source, afterloader safety systems can detect certain dose-delivery errors (for example, mechanical obstruction of the source or improperly connected guide tubes). Some of these er ...
Stroke
... The ideal brain imaging technique Widely available Inexpensive Not harmful Fast Easy access to patient Differentiate AIS from ICH and mimics Provide good anatomical resolution ...
... The ideal brain imaging technique Widely available Inexpensive Not harmful Fast Easy access to patient Differentiate AIS from ICH and mimics Provide good anatomical resolution ...
Spoiling of transverse magnetization in gradient
... (position = 0). Case (c) is markedly different than case (b), clearly demonstrating the impact of phase-encoding order on the signal evolution when using gradient spoiling. For gradient-refocused h4P-GRF,, we obtained the familiar result that initially the signal drops off rapidly, oscillates toward ...
... (position = 0). Case (c) is markedly different than case (b), clearly demonstrating the impact of phase-encoding order on the signal evolution when using gradient spoiling. For gradient-refocused h4P-GRF,, we obtained the familiar result that initially the signal drops off rapidly, oscillates toward ...
COCATS 4 Task Force 6: Training in Nuclear Cardiology
... 3. Use of methods for acquisition, reconstruction, and quantitative analysis of images 4. Appropriate radiation safety and quality improvement programs 5. Use of radiation monitoring instruments B. Procedures in which medical knowledge should be demonstrated and achievement of competency may be acco ...
... 3. Use of methods for acquisition, reconstruction, and quantitative analysis of images 4. Appropriate radiation safety and quality improvement programs 5. Use of radiation monitoring instruments B. Procedures in which medical knowledge should be demonstrated and achievement of competency may be acco ...
University of Groningen The hearing brain in males and
... Untill recently, our knowledge of the brain was based predominantly on post-mortem or lesion human brain studies or invasive animal studies. The past few decades this knowledge has increased rapidly by the development of (functional) neuroimaging techniques. With these techniques we are able to iden ...
... Untill recently, our knowledge of the brain was based predominantly on post-mortem or lesion human brain studies or invasive animal studies. The past few decades this knowledge has increased rapidly by the development of (functional) neuroimaging techniques. With these techniques we are able to iden ...
Dynamic contrast-enhanced MRI for prostate cancer localization
... ABSTRACT. Radiotherapy dose escalation improves tumour control in prostate cancer but with increased toxicity. Boosting focal tumour only may allow dose escalation with acceptable toxicity. Intensity-modulated radiotherapy can deliver this, but visualization of the tumour remains limiting. CT or con ...
... ABSTRACT. Radiotherapy dose escalation improves tumour control in prostate cancer but with increased toxicity. Boosting focal tumour only may allow dose escalation with acceptable toxicity. Intensity-modulated radiotherapy can deliver this, but visualization of the tumour remains limiting. CT or con ...
Revival of a Gamma Camera
... A collimator is used to select the direction of the photons incident to the camera and will determine the geometrical field of view (FOW). It also essentially determines the spatial resolution and the sensitivity of the system [4, 7, 11, 13]. A range of collimators is required to image different pho ...
... A collimator is used to select the direction of the photons incident to the camera and will determine the geometrical field of view (FOW). It also essentially determines the spatial resolution and the sensitivity of the system [4, 7, 11, 13]. A range of collimators is required to image different pho ...
Meandering Main Pancreatic Duct in a Case of Recurrent Acute
... episodes of acute pancreatitis for last 2 years. Contrast enhanced magnetic resonance imaging (MRI) of the abdomen was performed with magnetic resonance cholangiopancreatography (MRCP) at the time of first episode, which showed necrotic collection in pancreatic head region. Main pancreatic duct was ...
... episodes of acute pancreatitis for last 2 years. Contrast enhanced magnetic resonance imaging (MRI) of the abdomen was performed with magnetic resonance cholangiopancreatography (MRCP) at the time of first episode, which showed necrotic collection in pancreatic head region. Main pancreatic duct was ...
X-RAY DIAGNOSTIC R/F SYSTEMS
... as well as control the exposure manually. On request we can also fit the generator with a high-speed starter, that will increase speed of the tube anode up to 9000 rev/min and provide an increased (up to 2 times) load on the bulb. All diagnostic X-ray facilities X-ray emitters are fitted with a buil ...
... as well as control the exposure manually. On request we can also fit the generator with a high-speed starter, that will increase speed of the tube anode up to 9000 rev/min and provide an increased (up to 2 times) load on the bulb. All diagnostic X-ray facilities X-ray emitters are fitted with a buil ...
79252 SocThoracic - Society of Thoracic Radiology
... lung. Understanding of this simple structure and its anatomic components can provide the groundwork for comprehending virtually all pathologic lung processes. Each of the three main components of the SPL can be defined and assessed on HRCT. Identification of the distribution of disease within the lo ...
... lung. Understanding of this simple structure and its anatomic components can provide the groundwork for comprehending virtually all pathologic lung processes. Each of the three main components of the SPL can be defined and assessed on HRCT. Identification of the distribution of disease within the lo ...
3 aims of the study
... Volumetric CT, FDG-PET and DCE-MRI have been identified as the most promising imaging techniques for this specific application. Although those imaging techniques have different clinical development status – volumetric CT is already in clinical practice versus DCE-MRI as novel imaging technique in ra ...
... Volumetric CT, FDG-PET and DCE-MRI have been identified as the most promising imaging techniques for this specific application. Although those imaging techniques have different clinical development status – volumetric CT is already in clinical practice versus DCE-MRI as novel imaging technique in ra ...
ASFNR Recommendations for Clinical Performance of MR Dynamic
... and for monitoring for tumor recurrence in previously treated patients. Of the various techniques devised for evaluating cerebral perfusion imaging, the dynamic susceptibility contrast method has been employed most widely among clinical MR imaging practitioners. However, when implementing DSC MR per ...
... and for monitoring for tumor recurrence in previously treated patients. Of the various techniques devised for evaluating cerebral perfusion imaging, the dynamic susceptibility contrast method has been employed most widely among clinical MR imaging practitioners. However, when implementing DSC MR per ...
Supplemental Methods
... hearts in a contracted (systolic like) state by intravenous administration of BaCl2 (40 meq/kg) (4,5). All euthanasia procedures were performed under general anesthesia. Real time cine imaging (Appendix I) commenced before the administration of the euthanasia agents and continued until bulk cardiac ...
... hearts in a contracted (systolic like) state by intravenous administration of BaCl2 (40 meq/kg) (4,5). All euthanasia procedures were performed under general anesthesia. Real time cine imaging (Appendix I) commenced before the administration of the euthanasia agents and continued until bulk cardiac ...
spiral head ct in the evaluation of acute
... 2. Jayashankar A, Udayasankar U, Sebastian S, et al. MDCT of thoraco-abdominal trauma: an evaluation of the success and limitations of primary interpretation using MPR’s vs axial images. Emerg Radiol 2008; 15:29-34. 3. Strub WM, Leach JL, Tomsick T, Vagal A. Overnight preliminary head CT interpretat ...
... 2. Jayashankar A, Udayasankar U, Sebastian S, et al. MDCT of thoraco-abdominal trauma: an evaluation of the success and limitations of primary interpretation using MPR’s vs axial images. Emerg Radiol 2008; 15:29-34. 3. Strub WM, Leach JL, Tomsick T, Vagal A. Overnight preliminary head CT interpretat ...
Magnetic Resonance Imaging of the One
... diseased animal. Classical anatomic atlases cannot provide the spectrum of views and the details required in modern diagnostic and surgical techniques (Gehrmann et al., 2006; Dyson and Murray, 2007; Raji et al., 2008 and Vanderperren et al., 2008). The camel digits and feet are differ from those of ...
... diseased animal. Classical anatomic atlases cannot provide the spectrum of views and the details required in modern diagnostic and surgical techniques (Gehrmann et al., 2006; Dyson and Murray, 2007; Raji et al., 2008 and Vanderperren et al., 2008). The camel digits and feet are differ from those of ...
CUP MRI Proposal - Northern Michigan University
... online environment. Both are equally important in the development of the competent MRI technologist. MRI technologists are highly trained and possess the advanced skills and knowledge necessary for competent practice. They must have the ability to synthesize information and apply rational judgment i ...
... online environment. Both are equally important in the development of the competent MRI technologist. MRI technologists are highly trained and possess the advanced skills and knowledge necessary for competent practice. They must have the ability to synthesize information and apply rational judgment i ...
ACR–ASTRO Practice Parameter for Image
... When the target is not clearly visible and bony anatomy is not sufficient for adequate target alignment, fiducial markers may be needed. With megavoltage or kilovoltage X-ray imaging, fiducial markers (either already present or specifically implanted) can be used as surrogates to target areas. Fiduc ...
... When the target is not clearly visible and bony anatomy is not sufficient for adequate target alignment, fiducial markers may be needed. With megavoltage or kilovoltage X-ray imaging, fiducial markers (either already present or specifically implanted) can be used as surrogates to target areas. Fiduc ...
32 to 64 slice CT scanner comparison report version 12
... The MHRA DES does not have access to any information held by the Agency in its capacity as the Competent Authority for the UK, apart from any information already in the public domain. The reports will contain data given by the manufacturer on the regulatory status of their devices but, apart from th ...
... The MHRA DES does not have access to any information held by the Agency in its capacity as the Competent Authority for the UK, apart from any information already in the public domain. The reports will contain data given by the manufacturer on the regulatory status of their devices but, apart from th ...
Electronic Posters: Musculoskeletal
... initial histopathological changes of osteoarthritis (OA) occur at this surface; and if detected, could provide insight into OA progression. High-field MRI can detect collagen organization based on changes in T2 relaxation. In this study, T2 was used to assess articular cartilage surface collagen in ...
... initial histopathological changes of osteoarthritis (OA) occur at this surface; and if detected, could provide insight into OA progression. High-field MRI can detect collagen organization based on changes in T2 relaxation. In this study, T2 was used to assess articular cartilage surface collagen in ...
Positron emission tomography
Positron emission tomography (PET) is a nuclear medicine, functional imaging technique that produces a three-dimensional image of functional processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration within the body are then constructed by computer analysis. In modern PET-CT scanners, three dimensional imaging is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine.If the biologically active molecule chosen for PET is fluorodeoxyglucose (FDG), an analogue of glucose, the concentrations of tracer imaged will indicate tissue metabolic activity as it corresponds to the regional glucose uptake. Use of this tracer to explore the possibility of cancer metastasis (i.e., spreading to other sites) is the most common type of PET scan in standard medical care (90% of current scans). However, on a minority basis, many other radioactive tracers are used in PET to image the tissue concentration of other types of molecules of interest. One of the disadvantages of PET scanners is their operating cost.