1. Project title Evaluation of Image Guided Radiotherapy (IGRT) for
... treatment programme consisting of a series of daily treatments, called fractions, over a period of 3 weeks. The same patient position is reproduced each day using laser-light beams which must intersect pre-defined tattooed points on the skin surface. During standard treatment, images are generated b ...
... treatment programme consisting of a series of daily treatments, called fractions, over a period of 3 weeks. The same patient position is reproduced each day using laser-light beams which must intersect pre-defined tattooed points on the skin surface. During standard treatment, images are generated b ...
Images newsletter - Fall/Winter 2014
... imaging capacities. Wu will be guiding University neuroresearchers through using the radiochemistry program to facilitate their funded brain imaging clinical trials at UNC, just as her own neuroimaging research will rely on it for novel PET probe support. Wu noted: “Novel radiochemistry has been a m ...
... imaging capacities. Wu will be guiding University neuroresearchers through using the radiochemistry program to facilitate their funded brain imaging clinical trials at UNC, just as her own neuroimaging research will rely on it for novel PET probe support. Wu noted: “Novel radiochemistry has been a m ...
Fuchs` Endothelial Dystrophy in 830
... provide all of the information required for patient treatment. It is necessary to check central corneal thickness and to perform quantitative assessment of endothelial cells. For this purpose, specular microscopy, scanning slit confocal optical system, or confocal laser microscopy are currently used ...
... provide all of the information required for patient treatment. It is necessary to check central corneal thickness and to perform quantitative assessment of endothelial cells. For this purpose, specular microscopy, scanning slit confocal optical system, or confocal laser microscopy are currently used ...
R6 - American College of Radiology
... associated with administered medications. The equipment and medications should be monitored for inventory and drug expiration dates on a regular basis. The equipment, medications, and other emergency support must also be appropriate for the range of ages and sizes in the patient population. C. Exami ...
... associated with administered medications. The equipment and medications should be monitored for inventory and drug expiration dates on a regular basis. The equipment, medications, and other emergency support must also be appropriate for the range of ages and sizes in the patient population. C. Exami ...
Frequently Asked Questions About Clinical Dose Optimization
... components in standard medical physics practice. This has been explicitly stated by the American Association of Physics in Medicine Practice Guideline 1a: CT Protocol Management and Review Practice Guideline. As a result, these Joint Commission standards requirements likely do not fall under your cu ...
... components in standard medical physics practice. This has been explicitly stated by the American Association of Physics in Medicine Practice Guideline 1a: CT Protocol Management and Review Practice Guideline. As a result, these Joint Commission standards requirements likely do not fall under your cu ...
Evaluation and Validation of Computed Tomography Dose Accuracy
... from the two techniques. Tube currents of 140 mAs, 240 mAs and 300 mAs yielded 3.5%, 0.61% and -6.45% deviations when the respective CTDIvol values for both techniques were compared. There were mean CTDIvol of (42.3 + 8.6) mGy and (42.1 + 8.1) mGy for Barracuda and Ion Chamber techniques respectivel ...
... from the two techniques. Tube currents of 140 mAs, 240 mAs and 300 mAs yielded 3.5%, 0.61% and -6.45% deviations when the respective CTDIvol values for both techniques were compared. There were mean CTDIvol of (42.3 + 8.6) mGy and (42.1 + 8.1) mGy for Barracuda and Ion Chamber techniques respectivel ...
Column-Based Model of Electric Field Excitation of Cerebral Cortex
... very robust response in the M1-hand region for finger movement. The group-mean location of the finger-movement response was ⫺45, ⫺20, ⫹45 (x, y, z). Having made this initial determination of the group-mean location, a per-subject analysis was then carried out specifically targeting the M1hand region. P ...
... very robust response in the M1-hand region for finger movement. The group-mean location of the finger-movement response was ⫺45, ⫺20, ⫹45 (x, y, z). Having made this initial determination of the group-mean location, a per-subject analysis was then carried out specifically targeting the M1hand region. P ...
Imaging Sequences for First Pass Perfusion—A Review
... Successful myocardial perfusion imaging requires optimizing sequence and parameters to meet often contradictory requirements. The basic requirements are: 1. Temporal Resolution Two distinct measures of temporal resolution are important for perfusion imaging. The time between two images of the same s ...
... Successful myocardial perfusion imaging requires optimizing sequence and parameters to meet often contradictory requirements. The basic requirements are: 1. Temporal Resolution Two distinct measures of temporal resolution are important for perfusion imaging. The time between two images of the same s ...
Spirometer-controlled cine magnetic resonance imaging used to diagnose tracheobronchomalacia in paediatric
... Paediatric patients, who needed a chest MRI for various clinical indications and in whom the treating clinician requested assessment of TBM, based on their clinical presentation, were scheduled for a spirometer controlled cine-MRI. Half an hour before the MRI all children did a routine upright spiro ...
... Paediatric patients, who needed a chest MRI for various clinical indications and in whom the treating clinician requested assessment of TBM, based on their clinical presentation, were scheduled for a spirometer controlled cine-MRI. Half an hour before the MRI all children did a routine upright spiro ...
3-D Image Postprocessing Educational Framework
... postprocessing techniques, such as volume rendering and multiplanar reformations, allow realtime viewing of exam data in any plane with the ability to screen-capture the images for permanent digital archive. A variety of measurements also may be extracted from the volume data. The consistency and ac ...
... postprocessing techniques, such as volume rendering and multiplanar reformations, allow realtime viewing of exam data in any plane with the ability to screen-capture the images for permanent digital archive. A variety of measurements also may be extracted from the volume data. The consistency and ac ...
W(h)ither human cardiac and body magnetic resonance at ultrahigh
... becomes sufficiently short versus the size of the upper torso, abdomen and pelvis. As deep-lying organs surrounded by the lung, stomach, bowels and other inhomogeneous tissue structures within the comparatively large volume of the thorax, abdomen and pelvis, the anatomy targeted in CMR and BMR is par ...
... becomes sufficiently short versus the size of the upper torso, abdomen and pelvis. As deep-lying organs surrounded by the lung, stomach, bowels and other inhomogeneous tissue structures within the comparatively large volume of the thorax, abdomen and pelvis, the anatomy targeted in CMR and BMR is par ...
Contrast-enhanced MR angiography
... meaning that once contrast is administered and dynamic imaging performed, the process cannot be repeated without a second contrast bolus. If a second bolus is administered, not only are there the issues of expense and total patient dose, but residual soft-tissue enhancement can obscure vascular deta ...
... meaning that once contrast is administered and dynamic imaging performed, the process cannot be repeated without a second contrast bolus. If a second bolus is administered, not only are there the issues of expense and total patient dose, but residual soft-tissue enhancement can obscure vascular deta ...
Effective dose range for dental cone beam computed tomography
... become a widely accepted radiographic tool for diagnosis, treatment planning and follow-up in dentistry. This modality is also known as digital volume tomography (DVT). CBCT allows the acquisition of three-dimensional volumes of the dental arches and surrounding tissues at a high spatial resolution ...
... become a widely accepted radiographic tool for diagnosis, treatment planning and follow-up in dentistry. This modality is also known as digital volume tomography (DVT). CBCT allows the acquisition of three-dimensional volumes of the dental arches and surrounding tissues at a high spatial resolution ...
Sonography of the female pelvic floor
... there has recently been an increased demand of it particularly on the part of coloproctologists (Tab. 1).22-40 As the painless nature of pelvic floor sonography has resulted in high patient acceptance, we have also found that clinicians have lowered their threshold for obtaining an ultrasound examin ...
... there has recently been an increased demand of it particularly on the part of coloproctologists (Tab. 1).22-40 As the painless nature of pelvic floor sonography has resulted in high patient acceptance, we have also found that clinicians have lowered their threshold for obtaining an ultrasound examin ...
Diffusion tensor imaging of white matter pathology in the mouse brain
... is to maintain satisfactory signal-to-noise ratio at the target resolution. To achieve satisfac tory signal-to-noise ratio, most mouse brain DTI experiments were performed on high field systems (>4.7 Tesla). The disadvantage of a strong magnetic field is that it shortens tis sue T2 while lengtheni ...
... is to maintain satisfactory signal-to-noise ratio at the target resolution. To achieve satisfac tory signal-to-noise ratio, most mouse brain DTI experiments were performed on high field systems (>4.7 Tesla). The disadvantage of a strong magnetic field is that it shortens tis sue T2 while lengtheni ...
Flash speed. Lowest dose. - VCU Department of Radiology
... With the SOMATOM Definition Flash, discussions regarding high dose versus low dose cardiac scanning will change, because even under unfavorable conditions the patient exposure with the SOMATOM Definition Flash is less than what is required for diagnostic cardiac cath. High dose cardiac CT no longer ...
... With the SOMATOM Definition Flash, discussions regarding high dose versus low dose cardiac scanning will change, because even under unfavorable conditions the patient exposure with the SOMATOM Definition Flash is less than what is required for diagnostic cardiac cath. High dose cardiac CT no longer ...
AAPM/RSNA Physics Tutorial for Residents: Topics in CT
... Although computed tomography (CT) represents only a small percentage of radiologic examinations, it results in a significant portion of the effective radiation dose from medical procedures (1). With the increasing use of CT for screening procedures (2) and advances in scanner technology, the trend f ...
... Although computed tomography (CT) represents only a small percentage of radiologic examinations, it results in a significant portion of the effective radiation dose from medical procedures (1). With the increasing use of CT for screening procedures (2) and advances in scanner technology, the trend f ...
Role of Imaging in the Management of Oral Cancers
... • Principle- Normal nodes take up USPIO and appear dark while metastatic nodes do not take up USPIO and appear bright ...
... • Principle- Normal nodes take up USPIO and appear dark while metastatic nodes do not take up USPIO and appear bright ...
Chapter 01
... opaque markers in MV projection images as a means of assisting target localization. MV helical (Mackie, Holmes et al. 1993) and cone beam (Pouliot, Bani-Hashemi et al. 2005) computed tomography (CT) technologies have also been developed utilizing the treatment x-rays. These systems have been shown t ...
... opaque markers in MV projection images as a means of assisting target localization. MV helical (Mackie, Holmes et al. 1993) and cone beam (Pouliot, Bani-Hashemi et al. 2005) computed tomography (CT) technologies have also been developed utilizing the treatment x-rays. These systems have been shown t ...
Nuclear Medicine Phantom Instructions
... All applicants are required to submit a Tc-99m or Co-57 intrinsic or system flood field image, as well as a Tl-201 and/or a Ga-67/In-111 flood field image (if applicable). If both Tl-201 and Ga67/In-111 are currently used, uniformity images are required for both isotopes. Module 1(Planar Imaging Onl ...
... All applicants are required to submit a Tc-99m or Co-57 intrinsic or system flood field image, as well as a Tl-201 and/or a Ga-67/In-111 flood field image (if applicable). If both Tl-201 and Ga67/In-111 are currently used, uniformity images are required for both isotopes. Module 1(Planar Imaging Onl ...
SERIES IAEA HUMAN HEALTH SERIES
... promote the effective use of radiation for a diagnostic outcome through achieving and maintaining appropriate image quality, and on dose determination to allow the monitoring and reduction of dose to the patient. The role of computed tomography (CT) in modern medicine is well established as a means ...
... promote the effective use of radiation for a diagnostic outcome through achieving and maintaining appropriate image quality, and on dose determination to allow the monitoring and reduction of dose to the patient. The role of computed tomography (CT) in modern medicine is well established as a means ...
AAPM-RSNA Physics Tutorial for Residents: Typical Patient
... If all other variables are held constant, ESD will change as the square of the change in peak kilovoltage. The selection of higher peak kilovoltages increases the average energy of the x rays and therefore beam penetrability. As the beam becomes more penetrating, more x rays will reach the image rec ...
... If all other variables are held constant, ESD will change as the square of the change in peak kilovoltage. The selection of higher peak kilovoltages increases the average energy of the x rays and therefore beam penetrability. As the beam becomes more penetrating, more x rays will reach the image rec ...
The possibilities of reducing radiation dose and improve image
... Stochastic effect in radiation is increased probability of cancer induction. Deterministic effects are in example cataract, hair loss and erythema. The International Committee on Radiation Protection (ICRP) states that for doses of 100 mSv and higher, there is epidemiologic proven risk for radiation ...
... Stochastic effect in radiation is increased probability of cancer induction. Deterministic effects are in example cataract, hair loss and erythema. The International Committee on Radiation Protection (ICRP) states that for doses of 100 mSv and higher, there is epidemiologic proven risk for radiation ...
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.