PET and SPECT in epilepsy: A critical review
... and to be over and above that caused by neuron loss and hippocampal atrophy [34]. In malformations of cortical development, abnormalities of benzodiazepine receptors, as demonstrated with [11C]flumazenil PET, were more extensive than the structural abnormality revealed with MRI [35]. There often were ...
... and to be over and above that caused by neuron loss and hippocampal atrophy [34]. In malformations of cortical development, abnormalities of benzodiazepine receptors, as demonstrated with [11C]flumazenil PET, were more extensive than the structural abnormality revealed with MRI [35]. There often were ...
Full PDF - American Journal of Physiology
... effect of body posture on the distribution of pulmonary blood flow in healthy volunteers. When administering the macroaggregates with subjects in the upright posture and imaging the distribution with subjects in supine position, they observed a gravitational gradient with increasing blood flow from ...
... effect of body posture on the distribution of pulmonary blood flow in healthy volunteers. When administering the macroaggregates with subjects in the upright posture and imaging the distribution with subjects in supine position, they observed a gravitational gradient with increasing blood flow from ...
Extratesticular epidermoid cyst mimicking enlarged testis
... testis hidden below made the sonographic diagnosis even more challenging. In this circumstance, color Doppler ultrasound may help to differentiate true solid lesions from the solid-appearing ones by the presence of blood flow [6]. But it should be noticed that some ruptured epidermoid cysts also hav ...
... testis hidden below made the sonographic diagnosis even more challenging. In this circumstance, color Doppler ultrasound may help to differentiate true solid lesions from the solid-appearing ones by the presence of blood flow [6]. But it should be noticed that some ruptured epidermoid cysts also hav ...
The Debate on Pelvic Lymphadenopathy Size Significance in
... solution was administered one hour before CT imaging. At one hour after tracer administration, a lowdose CT scan was obtained in a 64 multi-detector CT machine, from the skull base to the mid-thigh. This scan was used for attenuation correction. Next, an emission PET scan was acquired in a three-dim ...
... solution was administered one hour before CT imaging. At one hour after tracer administration, a lowdose CT scan was obtained in a 64 multi-detector CT machine, from the skull base to the mid-thigh. This scan was used for attenuation correction. Next, an emission PET scan was acquired in a three-dim ...
IAEA
... IAEA work in Human Health The mandate on human health arises from Article II of the IAEA's Statute: “the Agency shall accelerate and enlarge the contribution of atomic energy to health.” IAEA ...
... IAEA work in Human Health The mandate on human health arises from Article II of the IAEA's Statute: “the Agency shall accelerate and enlarge the contribution of atomic energy to health.” IAEA ...
Patient Dose in common CT examinations-2003
... Since the discovery of X rays and radioactivity more than 100 years ago, different ways of producing radiation and radioactive materials artificially have been found. The first use of X rays was in medical diagnosis, within six months of their discovery in 1895. Diagnostic radiology is concerned wit ...
... Since the discovery of X rays and radioactivity more than 100 years ago, different ways of producing radiation and radioactive materials artificially have been found. The first use of X rays was in medical diagnosis, within six months of their discovery in 1895. Diagnostic radiology is concerned wit ...
Image Guided Surgical Interventions
... gantries that rotate a beam are the physical incarnation of modern tomographic imaging. The second innovation enabling higher resolution tomography is mathematical reconstruction such as filtered back projection or iterative reconstruction. Although x-ray is the most common application of tomographi ...
... gantries that rotate a beam are the physical incarnation of modern tomographic imaging. The second innovation enabling higher resolution tomography is mathematical reconstruction such as filtered back projection or iterative reconstruction. Although x-ray is the most common application of tomographi ...
high-resolution imaging in nontransparent tissue
... with an imaging resolution approaching that of histopathology [2]–[4]. This has led to the suggestion it will replace conventional biopsy in many circumstances. As this powerful technology moves into clinical trials, issues arise as to where it should be applied, both with respect to patient safety ...
... with an imaging resolution approaching that of histopathology [2]–[4]. This has led to the suggestion it will replace conventional biopsy in many circumstances. As this powerful technology moves into clinical trials, issues arise as to where it should be applied, both with respect to patient safety ...
Magnetic Resonance Imaging
... liquids within the human body, usually blood or cerebrospinal fluid (CSF). Arterial flow artifact has not only a flowing compo nent but also a pulsating one. The reasons for flow artifacts are multiple, and their appearance varies. Blood flowing through a slice can undergo excitation from an incomin ...
... liquids within the human body, usually blood or cerebrospinal fluid (CSF). Arterial flow artifact has not only a flowing compo nent but also a pulsating one. The reasons for flow artifacts are multiple, and their appearance varies. Blood flowing through a slice can undergo excitation from an incomin ...
guidelines for the use of radiographs in clinicalorthodontics
... X-RAYS, and their ability to penetrate human tissue to create a visual image, were discovered by Wilhelm Röntgen in 1895. Within weeks of their discovery the first dental radiographic images were created. Within months medical diagnostic imaging had been revolutionised. These early images required h ...
... X-RAYS, and their ability to penetrate human tissue to create a visual image, were discovered by Wilhelm Röntgen in 1895. Within weeks of their discovery the first dental radiographic images were created. Within months medical diagnostic imaging had been revolutionised. These early images required h ...
Radiation Oncology Error Management
... dose delivered to the patient be within ±5% of the prescribed dose. The goal of a QA program for linear accelerators is to assure that the machine characteristics do not deviate significantly from their baseline values acquired at the time of acceptance and ...
... dose delivered to the patient be within ±5% of the prescribed dose. The goal of a QA program for linear accelerators is to assure that the machine characteristics do not deviate significantly from their baseline values acquired at the time of acceptance and ...
Computed Tomography - Florida Administrative Code
... The practice of computed tomography is performed by a segment of health care professionals responsible for the administration of ionizing radiation to humans for diagnostic, therapeutic, or research purposes. A computed tomography technologist performs computed tomography procedures and related tech ...
... The practice of computed tomography is performed by a segment of health care professionals responsible for the administration of ionizing radiation to humans for diagnostic, therapeutic, or research purposes. A computed tomography technologist performs computed tomography procedures and related tech ...
QIBA proffered UPICT protocol for solid tumors - QIBA Wiki
... This document describes procedures for quantifying longitudinal changes in the volumes of solid tumors with x-ray computed tomography (CT). Compliance with these procedures will meet the claims for precision of measurement described in the corresponding Profile1 developed by the CT Technical Committ ...
... This document describes procedures for quantifying longitudinal changes in the volumes of solid tumors with x-ray computed tomography (CT). Compliance with these procedures will meet the claims for precision of measurement described in the corresponding Profile1 developed by the CT Technical Committ ...
MD Expo
... root causes of the RFIs? Does the safety culture in your organization encourage staff and medical staff to identify system and process problems so they can be addressed quickly or do you wait until something happens or a surveyor finds it? When you develop your ESC do you find a way to incorpora ...
... root causes of the RFIs? Does the safety culture in your organization encourage staff and medical staff to identify system and process problems so they can be addressed quickly or do you wait until something happens or a surveyor finds it? When you develop your ESC do you find a way to incorpora ...
Effects of collimator dependency and correction methods on I
... SC and AC image shows the most uniform image and the lung region is clearer than other methods. If AC was implemented, with or without SC, the images had a relatively equal distribution in the edge and the central regions of the torso volume. The lung region is also more visible as compared to image ...
... SC and AC image shows the most uniform image and the lung region is clearer than other methods. If AC was implemented, with or without SC, the images had a relatively equal distribution in the edge and the central regions of the torso volume. The lung region is also more visible as compared to image ...
Multislice Computed Tomography: Basic Principles and Clinical
... plane) and the longitudinal (axial) spatial resolution. In other words the isotropic 3-dimensional voxel could not be realized apart from some very specialized cases [3]. Similarly, in routine practice a number of limitations still remained which prevented the scanning protocol from being fully adap ...
... plane) and the longitudinal (axial) spatial resolution. In other words the isotropic 3-dimensional voxel could not be realized apart from some very specialized cases [3]. Similarly, in routine practice a number of limitations still remained which prevented the scanning protocol from being fully adap ...
CARDIAC CATHETERIZATION EQUIPMENT PERFORMANCE AAPM REPORT NO. 70 Report of Task Group #17
... heart into which catheters are placed, the clinical demands require the equipment to have superb image quality for dynamic studies of cardiac function in critically ill patients. Furthermore, there are few literature sources that gather this type of information in a single reference publication that ...
... heart into which catheters are placed, the clinical demands require the equipment to have superb image quality for dynamic studies of cardiac function in critically ill patients. Furthermore, there are few literature sources that gather this type of information in a single reference publication that ...
New dimensions in endodontic imaging: Part 2. Cone beam
... maxillofacial skeleton. Some CBCT scanners also allow the height of the cylindrical field of view to be adjusted to capture only the maxilla or mandible (for example. i-CAT). This has the advantage of reducing the patient radiation dose. Limited volume CBCT scanners (for example, the 3D Accuitomo, J ...
... maxillofacial skeleton. Some CBCT scanners also allow the height of the cylindrical field of view to be adjusted to capture only the maxilla or mandible (for example. i-CAT). This has the advantage of reducing the patient radiation dose. Limited volume CBCT scanners (for example, the 3D Accuitomo, J ...
Chylothorax Treatment Planning
... and flow patterns within the lymphatics has been described, but these are preliminary research experiences and are not widely available [45,46]. Computed tomography chest and abdomen Older studies noted that noncontrast computed tomography (CT) visualizes the cisterna chyli in 1.7% of cases and coul ...
... and flow patterns within the lymphatics has been described, but these are preliminary research experiences and are not widely available [45,46]. Computed tomography chest and abdomen Older studies noted that noncontrast computed tomography (CT) visualizes the cisterna chyli in 1.7% of cases and coul ...
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.