Adult Bile Duct Strictures - Geisel School of Medicine
... diseases, both benign and malignant, can result in the development of biliary strictures (Table 1). It is important to differentiate malignant from benign strictures, since their treatment and prognosis vary. Noninvasive imaging techniques such as ultrasonography (US), computed tomography (CT), and ...
... diseases, both benign and malignant, can result in the development of biliary strictures (Table 1). It is important to differentiate malignant from benign strictures, since their treatment and prognosis vary. Noninvasive imaging techniques such as ultrasonography (US), computed tomography (CT), and ...
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 ...
Breast Microcalcifications - Diagnostic Centers of America
... An ACR Committee on Appropriateness Criteria and its expert panels have developed criteria for determining appropriate imaging examinations for diagnosis and treatment of specified medical condition(s). These criteria are intended to guide radiologists, radiation oncologists, and referring physician ...
... An ACR Committee on Appropriateness Criteria and its expert panels have developed criteria for determining appropriate imaging examinations for diagnosis and treatment of specified medical condition(s). These criteria are intended to guide radiologists, radiation oncologists, and referring physician ...
Aalborg Universitet Magnetic resonance imaging of joints following intra-articular treatment and
... statistics and instructive discussions, and to Christian Cato Holm for helping me with the databases. I am indebted to the technologist at the Radiology Department Frederiksberg Hospital, and the technologist at the MRI Section Rigshospitalet who helped obtaining the MR images. My deepest appreciati ...
... statistics and instructive discussions, and to Christian Cato Holm for helping me with the databases. I am indebted to the technologist at the Radiology Department Frederiksberg Hospital, and the technologist at the MRI Section Rigshospitalet who helped obtaining the MR images. My deepest appreciati ...
Aalborg Universitet Magnetic resonance imaging of joints following
... statistics and instructive discussions, and to Christian Cato Holm for helping me with the databases. I am indebted to the technologist at the Radiology Department Frederiksberg Hospital, and the technologist at the MRI Section Rigshospitalet who helped obtaining the MR images. My deepest appreciati ...
... statistics and instructive discussions, and to Christian Cato Holm for helping me with the databases. I am indebted to the technologist at the Radiology Department Frederiksberg Hospital, and the technologist at the MRI Section Rigshospitalet who helped obtaining the MR images. My deepest appreciati ...
Identification of Venous Signal on Arterial Spin Labeling Improves
... time- and personnel-intensive and can cause patient discomfort. Even following DSA, mass effect from ICH and edema can obscure small lesions, and repeat DSA is generally recommended to increase detection sensitivity, as occurred in 2 cases in our series. ASL is becoming more common in the clinical s ...
... time- and personnel-intensive and can cause patient discomfort. Even following DSA, mass effect from ICH and edema can obscure small lesions, and repeat DSA is generally recommended to increase detection sensitivity, as occurred in 2 cases in our series. ASL is becoming more common in the clinical s ...
A Diagnostic Chest XRay: Multiple Myeloma
... B. G. M. Durie and S. E. Salmon, “A clinical staging system for multiple myeloma. Correlation of measured myeloma cell mass with presenting clinical features, response to treatment, and survival,” Cancer, vol. 36, no. 3, pp. 842–854, 1975. B. G. M. Durie, “The role of anatomic and functional staging ...
... B. G. M. Durie and S. E. Salmon, “A clinical staging system for multiple myeloma. Correlation of measured myeloma cell mass with presenting clinical features, response to treatment, and survival,” Cancer, vol. 36, no. 3, pp. 842–854, 1975. B. G. M. Durie, “The role of anatomic and functional staging ...
The Influence of Accurate Attenuation Correction - ORCA
... projection images acquired at a sufficient number of positions around the object being imaged. The projection images are generally acquired along an arc spanning at least 180°. This reconstruction may be carried out using filtered back projection or iterative reconstruction techniques as described i ...
... projection images acquired at a sufficient number of positions around the object being imaged. The projection images are generally acquired along an arc spanning at least 180°. This reconstruction may be carried out using filtered back projection or iterative reconstruction techniques as described i ...
Cone Beam Computed Tomography for Adaptive
... reliability [7,8]. Thus, to date treatment plans based on planning CT (PCT) image sets (fan beam geometry) are still superior to those based on CBCT image sets [9]. The magnitude of the scattered radiation in CBCT depends on the size of the scanned object [6,7,10] and hence soft tissue contrast beco ...
... reliability [7,8]. Thus, to date treatment plans based on planning CT (PCT) image sets (fan beam geometry) are still superior to those based on CBCT image sets [9]. The magnitude of the scattered radiation in CBCT depends on the size of the scanned object [6,7,10] and hence soft tissue contrast beco ...
Ms - F6 Publishing Home
... lower ADC values in patients with liver fibrosis and inflammation compared with normal liver tissue, and therefore ADC values may have a role as an index for predicting advanced hepatic fibrosis[12-14]. Gadoxetic acid (Primovist; Bayer Schering Pharma, Berlin, Germany) is a liver specific MR contras ...
... lower ADC values in patients with liver fibrosis and inflammation compared with normal liver tissue, and therefore ADC values may have a role as an index for predicting advanced hepatic fibrosis[12-14]. Gadoxetic acid (Primovist; Bayer Schering Pharma, Berlin, Germany) is a liver specific MR contras ...
Evaluation of absorbed dose and image quality in mammography
... With a lot of help from my friends ...
... With a lot of help from my friends ...
Type of article: Original
... Introduction: Digital subtraction angiography (DSA) has been the standard of reference for the detection and characterization of intracranial aneurysms because of its high spatial resolution and large field of view, but it has the disadvantage of being invasive and operator dependent. As a result of ...
... Introduction: Digital subtraction angiography (DSA) has been the standard of reference for the detection and characterization of intracranial aneurysms because of its high spatial resolution and large field of view, but it has the disadvantage of being invasive and operator dependent. As a result of ...
Optimal parameters for clinical implementation of breast cancer
... has been shown to greatly reduce imaging dose, acquisition time, and the possibility of collisions. According to measurements made using a thorax phantom with the isocenter positioned at the center of the phantom,(14) the DTS imaging dose ranged from less than 0.1 to 2.5 cGy compared to 3.8 to 6.2 c ...
... has been shown to greatly reduce imaging dose, acquisition time, and the possibility of collisions. According to measurements made using a thorax phantom with the isocenter positioned at the center of the phantom,(14) the DTS imaging dose ranged from less than 0.1 to 2.5 cGy compared to 3.8 to 6.2 c ...
Contrast medium administration and image acquisition parameters
... shape, and use of saline chaser. Vascular access site. The intravenous access site will affect TTP. Ideally, the location of choice is the antecubital vein, as it will always have less dilution of contrast with the blood since the distance to the heart is reduced compared with palmer surface locatio ...
... shape, and use of saline chaser. Vascular access site. The intravenous access site will affect TTP. Ideally, the location of choice is the antecubital vein, as it will always have less dilution of contrast with the blood since the distance to the heart is reduced compared with palmer surface locatio ...
Nuclear medicine in the diagnosis of benign thyroid diseases
... basis of ultrasonography, thyroid scintigraphy visualizes the distribution of active thyroid tissue [5]. Therefore, the general indications for scintigraphy are quite wide and include both single thyroid nodule, and multinodular goitre. The test is also used to evaluate the extent of retrosternal go ...
... basis of ultrasonography, thyroid scintigraphy visualizes the distribution of active thyroid tissue [5]. Therefore, the general indications for scintigraphy are quite wide and include both single thyroid nodule, and multinodular goitre. The test is also used to evaluate the extent of retrosternal go ...
Robust Free-Breathing Whole-Heart Cine MRI using Multi
... Cardiac cine MRI has become a routine exam for assessment of cardiac function and anatomy. Conventional 2D cine requires separate scouting scans to localize different views and at each orientation multiple breathholds are required with patient recuperation time in-between breathholds. 2D cine scans ...
... Cardiac cine MRI has become a routine exam for assessment of cardiac function and anatomy. Conventional 2D cine requires separate scouting scans to localize different views and at each orientation multiple breathholds are required with patient recuperation time in-between breathholds. 2D cine scans ...
Multimodality Imaging of Pericardial Diseases
... Pericardial disease is an important cause of morbidity and mortality in patients with cardiovascular disease. Inflammatory diseases of the pericardium constitute a spectrum ranging from acute pericarditis to chronic constrictive pericarditis. Other important entities that involve the pericardium inc ...
... Pericardial disease is an important cause of morbidity and mortality in patients with cardiovascular disease. Inflammatory diseases of the pericardium constitute a spectrum ranging from acute pericarditis to chronic constrictive pericarditis. Other important entities that involve the pericardium inc ...
PARATHYROID AND THYROID IMAGING
... imaging, angiography, and nuclear medicine scintigraphy. The advantages and disadvantages o{ each of the imaging modalities described are summarized in Table 1. High frequency (5-10 MHz) ultrasonography is the least invasive of the imaging modalities used to search for parathyroid adenomas because i ...
... imaging, angiography, and nuclear medicine scintigraphy. The advantages and disadvantages o{ each of the imaging modalities described are summarized in Table 1. High frequency (5-10 MHz) ultrasonography is the least invasive of the imaging modalities used to search for parathyroid adenomas because i ...
Changing the Playing Field with Integrated RIS/PACS RIS
... enterprise, enabling it to increase productivity among all physicians and boost timeliness of patient care. The radiology department is better serving its users, too. Report turnaround time has dropped, and images are universally available, streamlining consultations and allowing physicians to make ...
... enterprise, enabling it to increase productivity among all physicians and boost timeliness of patient care. The radiology department is better serving its users, too. Report turnaround time has dropped, and images are universally available, streamlining consultations and allowing physicians to make ...
The Lung Reporting and Data System (LU
... Despite the positive outcome of the recent randomized trial of computed tomography (CT) screening for lung cancer, substantial implementation challenges remain, including the clear reporting of relative risk and suggested workup of screen-detected nodules. Based on current literature, we propose a 6 ...
... Despite the positive outcome of the recent randomized trial of computed tomography (CT) screening for lung cancer, substantial implementation challenges remain, including the clear reporting of relative risk and suggested workup of screen-detected nodules. Based on current literature, we propose a 6 ...
Photoreceptor Perturbation Around Subretinal Drusenoid Deposits
... dimensions. Spectral-domain OCT can image crosssections of retina and choroid with sufficient resolution to reveal cellular and subcellular stratifications.16,17 A recent study has demonstrated the feasibility of using adaptive optics (AO) to image cones in the maculae of patients with pseudodrusen. ...
... dimensions. Spectral-domain OCT can image crosssections of retina and choroid with sufficient resolution to reveal cellular and subcellular stratifications.16,17 A recent study has demonstrated the feasibility of using adaptive optics (AO) to image cones in the maculae of patients with pseudodrusen. ...
A Study on Evaluation of kV-CBCT-image-based Treatment
... medical linear accelerator has improved the precision of targeting in radiotherapy. Two important applications of CBCT are patient setup and dose verification. A CBCT image of the patient on the treatment table can be acquired in about 60 seconds, just before delivery of each treatment. These pretre ...
... medical linear accelerator has improved the precision of targeting in radiotherapy. Two important applications of CBCT are patient setup and dose verification. A CBCT image of the patient on the treatment table can be acquired in about 60 seconds, just before delivery of each treatment. These pretre ...
Dynamic Contrast-Enhanced MRI of Prostate Cancer at 3 T: A Study
... transfer constant), kep (reverse reflux rate constant between extracellular space and plasma), ve (the fractional volume of extracellular space per unit volume of tissue), and the area under the gadolinium concentration curve (AUGC) in the first 90 seconds after injection. RESULTS. Pathologically co ...
... transfer constant), kep (reverse reflux rate constant between extracellular space and plasma), ve (the fractional volume of extracellular space per unit volume of tissue), and the area under the gadolinium concentration curve (AUGC) in the first 90 seconds after injection. RESULTS. Pathologically co ...
Tissue Doppler Imaging: Myocardial Velocities and Strain
... observer experience is even more important and accurate assessment of regional function becomes more difficult at peak stress. Previously described quantitative echocardiographic methods such as acoustic quantification or color – kinesis have many disadvantages and as yet have not found their way in ...
... observer experience is even more important and accurate assessment of regional function becomes more difficult at peak stress. Previously described quantitative echocardiographic methods such as acoustic quantification or color – kinesis have many disadvantages and as yet have not found their way in ...
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.