Neuroradiology - Past Meetings
... Normal temporal bone anatomy, with an emphasis on middle ear structures Review of the Jahrsdoerfer scoring system for congenital aural atresia, and how it is used to determine the appropriateness of performing atresiaplasty Patients with score 6/10 or lower are poor surgical candidates Evaluation of ...
... Normal temporal bone anatomy, with an emphasis on middle ear structures Review of the Jahrsdoerfer scoring system for congenital aural atresia, and how it is used to determine the appropriateness of performing atresiaplasty Patients with score 6/10 or lower are poor surgical candidates Evaluation of ...
3D dose verification for advanced radiotherapy
... dosimetry). This thesis deals with both strategies. First, the pre-treatment verification part deals with verification methods and procedures that are applied before the first fraction of a treatment is given. These pretreatment verification strategies are useful for detecting errors made during tre ...
... dosimetry). This thesis deals with both strategies. First, the pre-treatment verification part deals with verification methods and procedures that are applied before the first fraction of a treatment is given. These pretreatment verification strategies are useful for detecting errors made during tre ...
Applicable Neuroradiology - LSU School of Medicine
... Single Photon Emission Computed Tomography Developed in 60’s (along with CT) gamma ray-emitting long-acting isotope (Technetium-99m) shows regional CBF Can help localize seizure onset (Ictal-SPECT) Can be superimposed on CT or MRI More available than PET ...
... Single Photon Emission Computed Tomography Developed in 60’s (along with CT) gamma ray-emitting long-acting isotope (Technetium-99m) shows regional CBF Can help localize seizure onset (Ictal-SPECT) Can be superimposed on CT or MRI More available than PET ...
portal dosimetry in radiotherapy
... back‐projection procedure of the measured portal dose into three dimensions. The accuracy and clinical applicability of the dose verification methods was investigated and results are presented from large‐scale clinical use. The final goal was to show that routine portal dosi ...
... back‐projection procedure of the measured portal dose into three dimensions. The accuracy and clinical applicability of the dose verification methods was investigated and results are presented from large‐scale clinical use. The final goal was to show that routine portal dosi ...
The Left Atrial Appendage: Anatomy, Function, and Noninvasive
... The left atrial appendage (LAA) is a finger-like extension originating from the main body of the left atrium. Atrial fibrillation (AF) is the most common clinically important cardiac arrhythmia, occurring in approximately 0.4% to 1% of the general population and increasing with age to >8% in those >80 ...
... The left atrial appendage (LAA) is a finger-like extension originating from the main body of the left atrium. Atrial fibrillation (AF) is the most common clinically important cardiac arrhythmia, occurring in approximately 0.4% to 1% of the general population and increasing with age to >8% in those >80 ...
Detection of pulmonary nodules in chest tomosynthesis
... 3-dimensional technique providing parallel sections of the body, and obscuring anatomy can thus be eliminated. Structures of interest may, therefore, be more easily detected than in conventional radiography. The disadvantages usually associated with CT are high effective doses, high cost and lower a ...
... 3-dimensional technique providing parallel sections of the body, and obscuring anatomy can thus be eliminated. Structures of interest may, therefore, be more easily detected than in conventional radiography. The disadvantages usually associated with CT are high effective doses, high cost and lower a ...
University of Groningen Visualization, classification and
... ultrasound (IVUS) has been regarded as the gold standard modality to visualize plaque component and morphology in vivo. However, IVUS is limited in not being able to reach the small vessels due to the fact that it is catheter based. Both X-ray angiography and IVUS are invasive modalities which carri ...
... ultrasound (IVUS) has been regarded as the gold standard modality to visualize plaque component and morphology in vivo. However, IVUS is limited in not being able to reach the small vessels due to the fact that it is catheter based. Both X-ray angiography and IVUS are invasive modalities which carri ...
Breast imaging: a guide for practice
... medico-legal implications for women and clinicians. The assessment of a breast change can be an anxiety-inducing experience for women, with well documented, adverse psychological consequences.17–22 ...
... medico-legal implications for women and clinicians. The assessment of a breast change can be an anxiety-inducing experience for women, with well documented, adverse psychological consequences.17–22 ...
Attenuation Correction of Myocardial Perfusion Scintigraphy Images
... I, Sarah Catherine Cade, confirm that the work presented in this thesis is my own. Where information has been derived from other sources, I confirm that this has been indicated in the thesis. ...
... I, Sarah Catherine Cade, confirm that the work presented in this thesis is my own. Where information has been derived from other sources, I confirm that this has been indicated in the thesis. ...
006 RSNA News Jun04.qxd
... research shows that people are developing cataracts at much lower radiation doses than permissible limits allow,” says Basil V. Worgul, Ph.D., a professor of radiation biology in ophthalmology and radiology at Columbia University College of Physicians and Surgeons in New York City. Some of that othe ...
... research shows that people are developing cataracts at much lower radiation doses than permissible limits allow,” says Basil V. Worgul, Ph.D., a professor of radiation biology in ophthalmology and radiology at Columbia University College of Physicians and Surgeons in New York City. Some of that othe ...
PDF hosted at the Radboud Repository of the Radboud University
... For an accurate diagnosis and treatment planning of orthodontic patients, a comprehensive view of a patient’s face and all structures forming the face, is needed. Thereto orthodontic records are made, visualizing the craniofacial complex. With these records a clinician is able to study soft tissues, ...
... For an accurate diagnosis and treatment planning of orthodontic patients, a comprehensive view of a patient’s face and all structures forming the face, is needed. Thereto orthodontic records are made, visualizing the craniofacial complex. With these records a clinician is able to study soft tissues, ...
Multi-slice helical CT: Scan and reconstruction
... array to simultaneously collect data at different slice locations. The multi-slice CT scanner has the capability of rapidly scanning large longitudinal ~z! volume with high z-axis resolution. It also presents new challenges and new characteristics. In this paper, we study the scan and reconstruction ...
... array to simultaneously collect data at different slice locations. The multi-slice CT scanner has the capability of rapidly scanning large longitudinal ~z! volume with high z-axis resolution. It also presents new challenges and new characteristics. In this paper, we study the scan and reconstruction ...
Avaliação de sistemas de controle automático de
... Figure 1 – The first generation has a pencil beam translation over the patient to reach an attenuation profile, which makes the imaging reconstruction system capable to distinguish different types of tissues and structures. (source: Hypermedia MS[16])................................................. ...
... Figure 1 – The first generation has a pencil beam translation over the patient to reach an attenuation profile, which makes the imaging reconstruction system capable to distinguish different types of tissues and structures. (source: Hypermedia MS[16])................................................. ...
Biologically conformal radiation therapy and Monte
... relied strongly on the available imaging technologies. Anatomical imaging techniques like computed tomography (CT) can visualize spatial changes in physical properties within patients. Additionally, tumor biology plays an important role in the diagnosis, treatment decisionmaking and the assessment o ...
... relied strongly on the available imaging technologies. Anatomical imaging techniques like computed tomography (CT) can visualize spatial changes in physical properties within patients. Additionally, tumor biology plays an important role in the diagnosis, treatment decisionmaking and the assessment o ...
20 CT Angiography of the Thoracic Aorta
... assessing stent grafts, 5-mm-thick unenhanced sections can be useful for mapping the location of calcifications around the stent graft, which can subsequently mimic an endoleak following contrast administration. Because these initial unenhanced scans are thick, a relatively low tube current and poten ...
... assessing stent grafts, 5-mm-thick unenhanced sections can be useful for mapping the location of calcifications around the stent graft, which can subsequently mimic an endoleak following contrast administration. Because these initial unenhanced scans are thick, a relatively low tube current and poten ...
American Association of Physicists in Medicine 40th Annual
... A and B. Blocks C and D correspond primarily to the scientific sessions, however there is an occasional symposium in these time blocks as well. Block E is reserved primarily to the afternoon symposia, however occasionally scientific sessions may be in these time blocks as well. In general, Tracks 1 ...
... A and B. Blocks C and D correspond primarily to the scientific sessions, however there is an occasional symposium in these time blocks as well. Block E is reserved primarily to the afternoon symposia, however occasionally scientific sessions may be in these time blocks as well. In general, Tracks 1 ...
revised european training curriculum for radiology
... • To understand physics of image production in mammography, particularly how they affect image quality • To analyse and explain principles of current practice in breast imaging and breast cancer screening • To know the risk/benefit analysis associated with breast cancer screening • To describe t ...
... • To understand physics of image production in mammography, particularly how they affect image quality • To analyse and explain principles of current practice in breast imaging and breast cancer screening • To know the risk/benefit analysis associated with breast cancer screening • To describe t ...
How I Do It: Evaluating Renal Masses
... from outside of the mass into the ROI, which will lead to erroneous measurements. It has been shown that renal cysts on occasion may show artificial apparent enhancement of 10 HU or more (pseudoenhancement) at contrast-enhanced CT, and this may potentially lead to the mischaracterization of a renal ...
... from outside of the mass into the ROI, which will lead to erroneous measurements. It has been shown that renal cysts on occasion may show artificial apparent enhancement of 10 HU or more (pseudoenhancement) at contrast-enhanced CT, and this may potentially lead to the mischaracterization of a renal ...
Cone Beam Ct for Dental and Maxillofacial Radiology
... The developments in medical imaging using ionising radiation have implications for radiation protection of the staff, the public and the patient. At the level of the European Union, these implications are well recognised and action is taken by the European Commission to address them. This is done in ...
... The developments in medical imaging using ionising radiation have implications for radiation protection of the staff, the public and the patient. At the level of the European Union, these implications are well recognised and action is taken by the European Commission to address them. This is done in ...
Musculoskeletal Ultrasound: Focused Impact on MRI
... at several levels. First, proper equipment including transducer selection is required to optimize results. Next, the individual performing ultrasound must understand anatomy to find the structure of interest, adequately evaluate that structure in a standardized imaging plane, recognize artifacts suc ...
... at several levels. First, proper equipment including transducer selection is required to optimize results. Next, the individual performing ultrasound must understand anatomy to find the structure of interest, adequately evaluate that structure in a standardized imaging plane, recognize artifacts suc ...
Three-Dimensional C-arm Cone-beam CT: Applications in the Interventional Suite
... axial (z) projections before therapy demonstrate substantial arterial supply of the tumor from a branch of the left hepatic artery. The volume of the lesion that is supplied by the branch of the left hepatic artery was assessed with 15-mm-thick maximum intensity projection reformations. The black ar ...
... axial (z) projections before therapy demonstrate substantial arterial supply of the tumor from a branch of the left hepatic artery. The volume of the lesion that is supplied by the branch of the left hepatic artery was assessed with 15-mm-thick maximum intensity projection reformations. The black ar ...
cone beam ct for dental and maxillofacial radiology
... models; research evidence for one CBCT machine may not apply to other equipment. As a consequence, caution is needed in generalising research findings. Many of the recommendations made are “Best Practice” rather than carrying any formal evidence grade, based upon the informed judgement of the Guidel ...
... models; research evidence for one CBCT machine may not apply to other equipment. As a consequence, caution is needed in generalising research findings. Many of the recommendations made are “Best Practice” rather than carrying any formal evidence grade, based upon the informed judgement of the Guidel ...
Calculation, verification and monitoring of patient dose in Diagnostic
... Routine Coronary Angiography is a relatively high dose diagnostic procedure. The results from a diagnostic procedure may indicate the need for an interventional examination, which has the potential for even higher patient dose. Doses for these procedures are monitored via an integrated dose area pro ...
... Routine Coronary Angiography is a relatively high dose diagnostic procedure. The results from a diagnostic procedure may indicate the need for an interventional examination, which has the potential for even higher patient dose. Doses for these procedures are monitored via an integrated dose area pro ...
LightSpeed™ VCT - Spectrum Medical X
... © 2011 General Electric Company. All rights reserved. This product is certified as a LightSpeed™ Multislice CT System. The MHLW certified number is 21100BZY00104000 ...
... © 2011 General Electric Company. All rights reserved. This product is certified as a LightSpeed™ Multislice CT System. The MHLW certified number is 21100BZY00104000 ...
2016 technical summaries
... women for breast abnormalities and, as a result, it is a tool of great importance for the early detection of breast cancer. Physical phantoms are commonly used as surrogates of breast tissue to evaluate some aspects of the performance of mammography systems. However, most phantoms do not reproduce t ...
... women for breast abnormalities and, as a result, it is a tool of great importance for the early detection of breast cancer. Physical phantoms are commonly used as surrogates of breast tissue to evaluate some aspects of the performance of mammography systems. However, most phantoms do not reproduce t ...
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.