19 Imaging Features of Hepatic Metastases: CT and MR
... hand colorectal cancer is the prototype of malignant disease, in which the presence of limited metastatic disease does not preclude surgery. Exact knowledge of number, localization and size of metastases is crucial to determine resectability. Thus, the imaging technique used to evaluate the liver mu ...
... hand colorectal cancer is the prototype of malignant disease, in which the presence of limited metastatic disease does not preclude surgery. Exact knowledge of number, localization and size of metastases is crucial to determine resectability. Thus, the imaging technique used to evaluate the liver mu ...
The Current Status of Breast MR Imaging Part I. Choice of
... activity of cancers yields a dedicated vasculature that supports the tumor and helps maintain its metabolic homeostasis. Angiogenesis is so closely correlated with invasive cancers that it probably constitutes a sine qua non for invasive growth per se. It is this angiogenic activity that constitutes ...
... activity of cancers yields a dedicated vasculature that supports the tumor and helps maintain its metabolic homeostasis. Angiogenesis is so closely correlated with invasive cancers that it probably constitutes a sine qua non for invasive growth per se. It is this angiogenic activity that constitutes ...
Coronary CT angiography: Diagnostic value and clinical challenges
... have shown the feasibility of using DECT for myocardial perfusion imaging of CAD. Ruzsics et al[23] compared DECT with SPECT to evaluate the diagnostic performance of DECT for imaging coronary artery morphology and assessing myocardial blood supply. In a group of 36 patients with suspected or known ...
... have shown the feasibility of using DECT for myocardial perfusion imaging of CAD. Ruzsics et al[23] compared DECT with SPECT to evaluate the diagnostic performance of DECT for imaging coronary artery morphology and assessing myocardial blood supply. In a group of 36 patients with suspected or known ...
Lung Nodule Volume Assessment and - QIBA Wiki
... Size quantification on serial imaging is helpful in evaluating whether a pulmonary nodule is benign or malignant. Currently, pulmonary nodule measurements most commonly are obtained as the average of two perpendicular dimensions on axial slices. Investigators have suggested that automated quantifica ...
... Size quantification on serial imaging is helpful in evaluating whether a pulmonary nodule is benign or malignant. Currently, pulmonary nodule measurements most commonly are obtained as the average of two perpendicular dimensions on axial slices. Investigators have suggested that automated quantifica ...
Quantitative assessment of MRI lesion load in multiple sclerosis
... with long echo-time. The main limitation of these sequences (i.e. the very long acquisition time) has recently been partly overcome by the concomitant use of a rapid acquisition with relaxation enhancement (Henning et al., 1986) imaging (fast-FLAIR). Multiple sclerosis lesions are characterized by h ...
... with long echo-time. The main limitation of these sequences (i.e. the very long acquisition time) has recently been partly overcome by the concomitant use of a rapid acquisition with relaxation enhancement (Henning et al., 1986) imaging (fast-FLAIR). Multiple sclerosis lesions are characterized by h ...
View - OhioLINK ETD
... as a testing tool for image quality assessment of dental CBCT units. In addition, the optimal diameter and features of a QA phantom for dental CBCT testing was assessed. Two commercially available phantoms were evaluated to assess the adequacy of each for use in the standardized testing procedures. ...
... as a testing tool for image quality assessment of dental CBCT units. In addition, the optimal diameter and features of a QA phantom for dental CBCT testing was assessed. Two commercially available phantoms were evaluated to assess the adequacy of each for use in the standardized testing procedures. ...
Cone-Beam Computed Tomography Examinations of
... The study was partly conducted in the Department of Radiation Practices Regulation at the Finnish Radiation and Nuclear Safety Authority (STUK). I would like to thank STUK for the opportunity and for the interesting topic of the thesis. I would also like to thank my former colleagues at STUK for the ...
... The study was partly conducted in the Department of Radiation Practices Regulation at the Finnish Radiation and Nuclear Safety Authority (STUK). I would like to thank STUK for the opportunity and for the interesting topic of the thesis. I would also like to thank my former colleagues at STUK for the ...
Welcome to Vienna. Welcome to the flower gardens of radiology
... Radiology is currently undergoing a metamorphosis, and there is a growing focus on functional, biological, and genetics-related imaging. Even though the mainstay of radiology is still ‘anatomical imaging’, we must provide information about cutting edge techniques to our colleagues, and help them to ...
... Radiology is currently undergoing a metamorphosis, and there is a growing focus on functional, biological, and genetics-related imaging. Even though the mainstay of radiology is still ‘anatomical imaging’, we must provide information about cutting edge techniques to our colleagues, and help them to ...
The effectiveness of Power Doppler vocal fremitus imaging in the
... imaging. US and power Doppler examinations were performed with a 5-14 MHz transducer (Antares, Siemens, Erlangen, Germany). Patients were scanned in a contralateral posterior oblique position, with the ipsilateral hand behind the head, in order to minimize breast tissue thickness. Initially, clockwi ...
... imaging. US and power Doppler examinations were performed with a 5-14 MHz transducer (Antares, Siemens, Erlangen, Germany). Patients were scanned in a contralateral posterior oblique position, with the ipsilateral hand behind the head, in order to minimize breast tissue thickness. Initially, clockwi ...
EVALUATION OF AN IN-LINE PHASE
... First and foremost, I must thank my committee chair Dr. Price. He is the most passionate scientist that I have met and has provided generous advice and support to me all throughout my research. I would also like to thank Dr. Pickens and Dr. Donnelly who have both provided their insight and expertise ...
... First and foremost, I must thank my committee chair Dr. Price. He is the most passionate scientist that I have met and has provided generous advice and support to me all throughout my research. I would also like to thank Dr. Pickens and Dr. Donnelly who have both provided their insight and expertise ...
Axially Extended-Volume C-Arm CT Using a Reverse Helical
... because it is difficult to perform a single scan that simultaneously provides information for trajectory calibration and tomographic data of the patient. C-arm CT usually performs trajectory calibration once and uses the calibrated trajectory in subsequent tomographic scans. Fourth, there is the iss ...
... because it is difficult to perform a single scan that simultaneously provides information for trajectory calibration and tomographic data of the patient. C-arm CT usually performs trajectory calibration once and uses the calibrated trajectory in subsequent tomographic scans. Fourth, there is the iss ...
Anniversary Paper: Development of x
... 共NEQ兲, and signal detectability were also developed and applied to evaluating CT image quality.26,27 Image artifacts also occupied an important body of early research. The deleterious effect of the polychromatic spectrum of conventional x-ray sources on CT image quality— the so-called beam hardening ...
... 共NEQ兲, and signal detectability were also developed and applied to evaluating CT image quality.26,27 Image artifacts also occupied an important body of early research. The deleterious effect of the polychromatic spectrum of conventional x-ray sources on CT image quality— the so-called beam hardening ...
1 Imaging for Clinical Trials at Vanderbilt University Medical Center
... through the Office of Research CORES/iLab system on a monthly basis. Visit Clinical Trials Radiology Support Core iLab website for further information on fees. Turn-around time for completion of de-identified discs averages 24-72 hours. Discs for procedures that were not performed at VUH Radiology m ...
... through the Office of Research CORES/iLab system on a monthly basis. Visit Clinical Trials Radiology Support Core iLab website for further information on fees. Turn-around time for completion of de-identified discs averages 24-72 hours. Discs for procedures that were not performed at VUH Radiology m ...
Society of Nuclear Medicine Procedure Guideline
... standard 2 mg dose, may be administered intravenously over 2-3 min (25, 28). If the cystic duct is patent, flow of bile into the gallbladder will be facilitated by morphine-induced temporary spasm of the sphincter of Oddi. Tracer activity should be present in the small bowel at the time of morphine ...
... standard 2 mg dose, may be administered intravenously over 2-3 min (25, 28). If the cystic duct is patent, flow of bile into the gallbladder will be facilitated by morphine-induced temporary spasm of the sphincter of Oddi. Tracer activity should be present in the small bowel at the time of morphine ...
Detection of Coronary Artery Stenoses by Contrast
... branches), 174 could be evaluated (68%). In 19 patients (30%), all arteries were evaluable. Artifacts caused by coronary motion were the most frequent reason for unevaluable arteries. Overall, 32 of 58 high-grade stenoses and occlusions were detected by MSCT (58%). In evaluable arteries, 32 of 35 le ...
... branches), 174 could be evaluated (68%). In 19 patients (30%), all arteries were evaluable. Artifacts caused by coronary motion were the most frequent reason for unevaluable arteries. Overall, 32 of 58 high-grade stenoses and occlusions were detected by MSCT (58%). In evaluable arteries, 32 of 35 le ...
Left ventricular function in patients with coronary artery
... First-pass radionuclide angiography. First-pass radionuclide angiography was performed on the same day as the gated SPECT perfusion study in 38 patients with the use of a single crystal high count rate gamma camera fitted with a high sensitivity parallel hole collimator (Elscint Apex 409AG). Anterio ...
... First-pass radionuclide angiography. First-pass radionuclide angiography was performed on the same day as the gated SPECT perfusion study in 38 patients with the use of a single crystal high count rate gamma camera fitted with a high sensitivity parallel hole collimator (Elscint Apex 409AG). Anterio ...
Computed tomography in the evaluation for transcatheter aortic
... to minimize cardiac output and prevent migration of the valve during deployment. The self-expanding CoreValve (Medtronic) is typically deployed without pacing. The stent-valve is anchored within the annulus and, depending on stent design, additional stability is provided by the displaced calcified l ...
... to minimize cardiac output and prevent migration of the valve during deployment. The self-expanding CoreValve (Medtronic) is typically deployed without pacing. The stent-valve is anchored within the annulus and, depending on stent design, additional stability is provided by the displaced calcified l ...
Cone beam computed tomography and other imaging techniques in
... led to a rapid decline in use. Firstly a two-hundred fold higher patient dose limits the use to select cases after a risk-benefit calculation has been performed. The field of view has become more suitable for the head and neck region, but it is not possible to restrict it to small regions such as qu ...
... led to a rapid decline in use. Firstly a two-hundred fold higher patient dose limits the use to select cases after a risk-benefit calculation has been performed. The field of view has become more suitable for the head and neck region, but it is not possible to restrict it to small regions such as qu ...
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 ...
Clinical study of peroneal artery perforators with
... need to incorporate portions of the soleus or flexor hallucis longus muscle. However, for this to occur, the viability of the skin island depends upon the successful inclusion of a sufficient number of perforators and the size and location of these perforators are integral during flap design and ele ...
... need to incorporate portions of the soleus or flexor hallucis longus muscle. However, for this to occur, the viability of the skin island depends upon the successful inclusion of a sufficient number of perforators and the size and location of these perforators are integral during flap design and ele ...
Structure of the Atom - The American Association of Physicists in
... A. The substance is not radioactive since it did not register in both orientations B. The substance emits high-energy photons since it only registered when unshielded C. The substance emits particulate radiation or very lowenergy photons since it only registered when unshielded D. The substance has ...
... A. The substance is not radioactive since it did not register in both orientations B. The substance emits high-energy photons since it only registered when unshielded C. The substance emits particulate radiation or very lowenergy photons since it only registered when unshielded D. The substance has ...
RBFM v5n1.indb
... ICMP 2011, in Porto Alegre, enabled the reunion of medical physicists, engineers and other professionals that work in this field for different activities, such as symposiums, workshops, courses and meetings that started a few days before the conference, from April 15 to 17. One of these events was t ...
... ICMP 2011, in Porto Alegre, enabled the reunion of medical physicists, engineers and other professionals that work in this field for different activities, such as symposiums, workshops, courses and meetings that started a few days before the conference, from April 15 to 17. One of these events was t ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... helical-CT units were not originally developed for this purpose. The problems in adapting helical-CT scans for dental use include: high cost, large space requirement, long scanning time, high radiation exposure, and low resolution in the longitudinal direction compared with it‟s relatively high reso ...
... helical-CT units were not originally developed for this purpose. The problems in adapting helical-CT scans for dental use include: high cost, large space requirement, long scanning time, high radiation exposure, and low resolution in the longitudinal direction compared with it‟s relatively high reso ...
Diagnostic Imaging Vol 2 - PACS and specialist imaging
... examinations, the radiation exposure is relatively low. Dental radiography accounts for less than 2% of the total radiation dose given to the population as a whole from medical applications. 1.4 As is common with other areas in radiology, the rate of development of dental imaging techniques, equipme ...
... examinations, the radiation exposure is relatively low. Dental radiography accounts for less than 2% of the total radiation dose given to the population as a whole from medical applications. 1.4 As is common with other areas in radiology, the rate of development of dental imaging techniques, equipme ...
Automated measurement of mean wall thickness in the common
... disease (6) and has been used as an endpoint in clinical trials assessing the effect of pharmacological treatment of systemic atherosclerosis (7–10). In this study we sought to determine whether MRI could make an equivalent measurement of carotid wall thickness. One reason for investigating MRI as a ...
... disease (6) and has been used as an endpoint in clinical trials assessing the effect of pharmacological treatment of systemic atherosclerosis (7–10). In this study we sought to determine whether MRI could make an equivalent measurement of carotid wall thickness. One reason for investigating MRI as a ...
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.