Magnetic resonance imaging of cholesteatoma: an update
... it is not enhanced after intravenous gadolinium administration. Theoretically, the enhancement of the surrounding epithelial (matrix) and granular (perimatrix) layers can be seen as a thin, enhanced line (peripheral rim) on T1-weighted images after intravenous administration of gadolinium; but this ...
... it is not enhanced after intravenous gadolinium administration. Theoretically, the enhancement of the surrounding epithelial (matrix) and granular (perimatrix) layers can be seen as a thin, enhanced line (peripheral rim) on T1-weighted images after intravenous administration of gadolinium; but this ...
European Guidelines on DRLs for Paediatric Imaging
... measure to improve optimization of patient protection, by identifying high patient dose levels which might not be justified on the basis of image quality requirements. DRLs should be set for common examinations using easily measurable dose quantities. National DRLs are usually set by a collaboration ...
... measure to improve optimization of patient protection, by identifying high patient dose levels which might not be justified on the basis of image quality requirements. DRLs should be set for common examinations using easily measurable dose quantities. National DRLs are usually set by a collaboration ...
Annotations Part II Vertebral Fracture Initiative Slide 1 Slide 3
... • This particularly applies to lateral views in which the divergent X-ray beam, poor positioning or scoliosis may result in biconcave endplates which must not erroneously be interpreted as vertebral fractures. • In the breath-hold technique in the thoracic spine, rib margins may obscure vertebral en ...
... • This particularly applies to lateral views in which the divergent X-ray beam, poor positioning or scoliosis may result in biconcave endplates which must not erroneously be interpreted as vertebral fractures. • In the breath-hold technique in the thoracic spine, rib margins may obscure vertebral en ...
Health Technology Assessment of Positron Emission Tomography
... Tomography or Magnetic Resonance Imaging which both provide images based upon anatomy, PET creates images that reflect biochemical processes and blood flow. Most radioisotopes used in clinical PET are combined with organic compounds. The most commonly used isotope is F18fluorodeoxyglucose (FDG), whi ...
... Tomography or Magnetic Resonance Imaging which both provide images based upon anatomy, PET creates images that reflect biochemical processes and blood flow. Most radioisotopes used in clinical PET are combined with organic compounds. The most commonly used isotope is F18fluorodeoxyglucose (FDG), whi ...
Evaluation of image quality and patient radiation dose in digital
... the latter detector achieved a dose reduction of more than 60%. In flatpanel systems based on amorphous selenium, on the other hand, similar dose levels as measured in state-of-the-art screen-film chest radiography must be applied. Similarly, no significant dose reductions were found for storage pho ...
... the latter detector achieved a dose reduction of more than 60%. In flatpanel systems based on amorphous selenium, on the other hand, similar dose levels as measured in state-of-the-art screen-film chest radiography must be applied. Similarly, no significant dose reductions were found for storage pho ...
CAR Guidelines and Standards for Cardiac Computed Tomography
... Invasive coronary angiography remains the gold standard for imaging of the coronary arteries. Because of poor temporal and spatial resolution, non-invasive imaging of the heart using computed tomography had remained a challenge until the recent past. Since 1999, and the advent of 4-detector ECG-gate ...
... Invasive coronary angiography remains the gold standard for imaging of the coronary arteries. Because of poor temporal and spatial resolution, non-invasive imaging of the heart using computed tomography had remained a challenge until the recent past. Since 1999, and the advent of 4-detector ECG-gate ...
optimisation and establishment of diagnostic
... paediatric plain radiography and to optimise the most frequent paediatric plain radiography examinations in Portugal following an analysis and evaluation of current practice. Methods and materials: Anthropometric data (weight, patient height and thickness of the irradiated ...
... paediatric plain radiography and to optimise the most frequent paediatric plain radiography examinations in Portugal following an analysis and evaluation of current practice. Methods and materials: Anthropometric data (weight, patient height and thickness of the irradiated ...
4D-CT Lung Registration and its Application for Lung
... information, 3D lung data need to be captured as the first step. The commonly clinical used body-scanning techniques are Ultrasound, MRI and CT. Ultrasound clinical device sends and collects high frequency sound waves through human body. Using the different rate of penetrating ability of ultrasound ...
... information, 3D lung data need to be captured as the first step. The commonly clinical used body-scanning techniques are Ultrasound, MRI and CT. Ultrasound clinical device sends and collects high frequency sound waves through human body. Using the different rate of penetrating ability of ultrasound ...
Perfusion Imaging Using Arterial Spin Labeling
... ference in blood and tissue water contents: Cv(t) = CT(t)/ with = blood–brain partition coefficient, which can be different for different tissues.3 While the Kety-Schmidt method is rarely used in patients today, their theory has been applied for the estimation of rCBF in numerous techniques, main ...
... ference in blood and tissue water contents: Cv(t) = CT(t)/ with = blood–brain partition coefficient, which can be different for different tissues.3 While the Kety-Schmidt method is rarely used in patients today, their theory has been applied for the estimation of rCBF in numerous techniques, main ...
AdoptedRules02009-00806 - Colorado Secretary of State
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
Code of Colorado Regulations - Colorado Secretary of State
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
Pediatric FDG PET/CT: Physiologic Uptake, Normal Variants, and
... least 15–20 minutes. Patient motion will interrupt the PET study, resulting in inadequate image quality (16). Generally, sedation or anesthesia protocols are variable and are performed in accordance with institutional guidelines. Guidelines from the American College of Radiology and the American Aca ...
... least 15–20 minutes. Patient motion will interrupt the PET study, resulting in inadequate image quality (16). Generally, sedation or anesthesia protocols are variable and are performed in accordance with institutional guidelines. Guidelines from the American College of Radiology and the American Aca ...
Transplanted Kidney Function Evaluation
... improvements in imaging modalities have been regarded as one of the factors contributing to increased short-term graft survival. Each imaging procedure has its own unique contribution to the evaluation of renal transplant dysfunction. In the era of multimodality imaging and emerging clinical conside ...
... improvements in imaging modalities have been regarded as one of the factors contributing to increased short-term graft survival. Each imaging procedure has its own unique contribution to the evaluation of renal transplant dysfunction. In the era of multimodality imaging and emerging clinical conside ...
SCCT Guidelines for the Interpretation and Reporting of Coronary
... a longer segment of a vessel’s course and tend to reduce perceived image noise. However, there is loss of lesion information within the slab volume, as the MIP does not provide in-depth information or attenuation detail within the slice.43 Consequently, MIP should not be the sole technique used for ...
... a longer segment of a vessel’s course and tend to reduce perceived image noise. However, there is loss of lesion information within the slab volume, as the MIP does not provide in-depth information or attenuation detail within the slice.43 Consequently, MIP should not be the sole technique used for ...
dynamic contrast-enhanced breast mri - Stacks
... Thankfully, I have many long-time female friends who are engineers or scientists. I thank them for their keeping encouraging me and sharing many thoughts about life balance. In particular, Tammy Kim, Bomi Nam, and I attended the same high school and college, and came to the States within one after a ...
... Thankfully, I have many long-time female friends who are engineers or scientists. I thank them for their keeping encouraging me and sharing many thoughts about life balance. In particular, Tammy Kim, Bomi Nam, and I attended the same high school and college, and came to the States within one after a ...
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 ...
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 ...
Multimodality Imaging of Pericardial Diseases
... against the low attenuation of the surrounding fat. Visualization of the pericardium varies with location and is sometimes difficult against the lateral, posterior, and inferior left ventricular wall because of a paucity of pericardial fat. Appearance on CMR. CMR delineates the normal pericardium as ...
... against the low attenuation of the surrounding fat. Visualization of the pericardium varies with location and is sometimes difficult against the lateral, posterior, and inferior left ventricular wall because of a paucity of pericardial fat. Appearance on CMR. CMR delineates the normal pericardium as ...
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.