Structure of the Atom - The American Association of Physicists in
... tilting the x-ray tube in a special way in order to have the central axis beam positioned at the chest wall. What is the main advantage for such a unique design? A. to reduce heel effect and improve x-ray uniformity B. to improve heat capacity C. to include more breast tissues against chest wall D. ...
... tilting the x-ray tube in a special way in order to have the central axis beam positioned at the chest wall. What is the main advantage for such a unique design? A. to reduce heel effect and improve x-ray uniformity B. to improve heat capacity C. to include more breast tissues against chest wall D. ...
Chapter 4732 X-ray Definitions: Proposed Revisions to 4732.0110
... accelerator geometry in which the accelerated electron beam must change direction by passing through a bending magnet. Subp. 22. Bone densitometry system. "Bone densitometry system" means a medical device intended for medical purposes to measure bone density and mineral content by x-ray or gamma ray ...
... accelerator geometry in which the accelerated electron beam must change direction by passing through a bending magnet. Subp. 22. Bone densitometry system. "Bone densitometry system" means a medical device intended for medical purposes to measure bone density and mineral content by x-ray or gamma ray ...
Full Text - RSNA Publications Online
... The study was powered to show a difference in sensitivity of approximately 15% between contrast agents for the diagnosis of malignant lesions. By using the McNemar test of equality of paired proportions (nQuery, version 6.01; Statistical Solutions, Cork, Ireland), and assuming 25% discordant pairs, ...
... The study was powered to show a difference in sensitivity of approximately 15% between contrast agents for the diagnosis of malignant lesions. By using the McNemar test of equality of paired proportions (nQuery, version 6.01; Statistical Solutions, Cork, Ireland), and assuming 25% discordant pairs, ...
Optical Coherence Tomography: Newer Techniques, Newer Machines
... Sci J Med & Vis Res Foun June 2015 | volume XXXIII | number 2 | ...
... Sci J Med & Vis Res Foun June 2015 | volume XXXIII | number 2 | ...
Full Text - Diagnostic and Interventional Radiology
... overlying the vessel of interest. In addition, US is highly operator dependent. Because the present patient was in a post-traumatic setting, Doppler US was not performed. Supra-aortic arterial and venous structures may be visualized with a high imaging quality using MDCT technology, which offers a r ...
... overlying the vessel of interest. In addition, US is highly operator dependent. Because the present patient was in a post-traumatic setting, Doppler US was not performed. Supra-aortic arterial and venous structures may be visualized with a high imaging quality using MDCT technology, which offers a r ...
Experimental article – Reducing effective dose to a paediatric
... assess visual acuity before rating the images. Each image was rated for visual image quality against a reference image using 2 alternative forced choice software using a 5-point Likert scale. Physical measures (SNR and CNR) were also taken to assess image quality. Results: Of the 27 images rated, 13 ...
... assess visual acuity before rating the images. Each image was rated for visual image quality against a reference image using 2 alternative forced choice software using a 5-point Likert scale. Physical measures (SNR and CNR) were also taken to assess image quality. Results: Of the 27 images rated, 13 ...
From Chest Pain to Multiple Myeloma: Radiology in Practice
... • PCP initially attributed pain to costochondritis. • Pain was refractory to NSAIDs. • An outpt stress test was performed, which was normal. • Pain persisted for several more days and spread to mid-back. • Pt went to his local ED, where a CTA was performed to rule out a pulmonary embolism. ...
... • PCP initially attributed pain to costochondritis. • Pain was refractory to NSAIDs. • An outpt stress test was performed, which was normal. • Pain persisted for several more days and spread to mid-back. • Pt went to his local ED, where a CTA was performed to rule out a pulmonary embolism. ...
Rib Fractures - Diagnostic Centers of America
... increased incidence of various organ injuries. There is increased likelihood for injury to the adjacent subclavian and innominate vessels with displaced first and second rib fractures, but this injury can usually be suspected on clinical grounds or from the chest radiographic abnormalities [8]. Lowe ...
... increased incidence of various organ injuries. There is increased likelihood for injury to the adjacent subclavian and innominate vessels with displaced first and second rib fractures, but this injury can usually be suspected on clinical grounds or from the chest radiographic abnormalities [8]. Lowe ...
metomidate positron emission tomography after dexamethasone
... examinations and thus was not suppressed by dexamethasone pre-medication. On the other hand, this was also the case for one of the two non-functional incidentalomas. One may speculate that non-functional adrenocortical tumours may also still express a higher cell density, giving rise to an increased ...
... examinations and thus was not suppressed by dexamethasone pre-medication. On the other hand, this was also the case for one of the two non-functional incidentalomas. One may speculate that non-functional adrenocortical tumours may also still express a higher cell density, giving rise to an increased ...
3 aims of the study
... imaging vendors, by reducing variance inherent among differing hardware and software platforms. A first application area is cancer trials. Volumetric CT, FDG-PET and DCE-MRI have been identified as the most promising imaging techniques for this specific application. Although those imaging techniques ...
... imaging vendors, by reducing variance inherent among differing hardware and software platforms. A first application area is cancer trials. Volumetric CT, FDG-PET and DCE-MRI have been identified as the most promising imaging techniques for this specific application. Although those imaging techniques ...
DICOM Digital Mammography Subgroup
... reporting system for CT colonography (C-RADS). Second, an initial draft of a white paper describing the clinical needs and technological rationale for development of a DICOM Abdomen CAD Structured Report. The proposed scope is to limit the Structured Report content to findings and features, similar ...
... reporting system for CT colonography (C-RADS). Second, an initial draft of a white paper describing the clinical needs and technological rationale for development of a DICOM Abdomen CAD Structured Report. The proposed scope is to limit the Structured Report content to findings and features, similar ...
Voxar 3DTM PET/CT Fusion - Toshiba Medical Visualization
... Voxar 3D PET/CT Fusion incorporates many powerful one-click tools in a single screen for effective review of current and prior PET/CT studies. Combining automated functions with mouse-based navigation, the application is exceptionally easy to use. Accurate and efficient blending of PET and CT studie ...
... Voxar 3D PET/CT Fusion incorporates many powerful one-click tools in a single screen for effective review of current and prior PET/CT studies. Combining automated functions with mouse-based navigation, the application is exceptionally easy to use. Accurate and efficient blending of PET and CT studie ...
Asymmetric cone-beam transmission tomography
... Figure 12 shows the patient cone-beam transmission data reconstruction as desaibed in Section 1I.A.1. Slices #53 to #76 are displayed in 128 x 128 images, and the cardiac region is within the range of these slices. Larger views of the top, mid, and bottom images are also shown in Figure 12 with tiit ...
... Figure 12 shows the patient cone-beam transmission data reconstruction as desaibed in Section 1I.A.1. Slices #53 to #76 are displayed in 128 x 128 images, and the cardiac region is within the range of these slices. Larger views of the top, mid, and bottom images are also shown in Figure 12 with tiit ...
December 2012 - University of Iowa Carver College of Medicine
... nificant savings as well as a strategic research alliance that provides for the exchange of technology and scientific find‑ ings between the Radiology Department and Siemens. The period also saw major improvement in the department’s imaging equipment with the upgrading of all MR, CT, and PET scanner ...
... nificant savings as well as a strategic research alliance that provides for the exchange of technology and scientific find‑ ings between the Radiology Department and Siemens. The period also saw major improvement in the department’s imaging equipment with the upgrading of all MR, CT, and PET scanner ...
Optimal parameters for clinical implementation of breast cancer
... addition, our clinical experience has shown that rotations and translations can be difficult to distinguish using only two orthogonal planar images. Therefore volumetric images are desired for accurate patient setup. When clip localization with orthogonal kV radiographs is not feasible, cone-beam CT ...
... addition, our clinical experience has shown that rotations and translations can be difficult to distinguish using only two orthogonal planar images. Therefore volumetric images are desired for accurate patient setup. When clip localization with orthogonal kV radiographs is not feasible, cone-beam CT ...
ANSWERS Chapter 1 1. Define digital radiography. Answer: Term
... ability of phosphors to emit visible light only while exposed to x-rays. Phosphorescence occurs when screen phosphors continue to emit light after the x-ray exposure has stopped. This is also referred to as screen lag and will cause general overall fogging of the radiographic image and degrading the ...
... ability of phosphors to emit visible light only while exposed to x-rays. Phosphorescence occurs when screen phosphors continue to emit light after the x-ray exposure has stopped. This is also referred to as screen lag and will cause general overall fogging of the radiographic image and degrading the ...
Pre-print
... Free-breathing unilateral breast DCE MRI was performed in six patients (age 55.3±6.7 years) in sagittal orientation prior to MRI-guided biopsy using the radial 3D FLASH protocol on a 3-T scanner (MAGNETOM Trio, Siemens AG), ...
... Free-breathing unilateral breast DCE MRI was performed in six patients (age 55.3±6.7 years) in sagittal orientation prior to MRI-guided biopsy using the radial 3D FLASH protocol on a 3-T scanner (MAGNETOM Trio, Siemens AG), ...
Tomosynthesis finds invasive lobular carcinoma not visible
... 40% higher for invasive cancers and 27% higher for all cancers.2 Better lesion-margin analysis and more accurate lesion location have also been reported.4 In a tomosynthesis scan, the x-ray tube head moves over the breast, acquiring 15 low-dose images over a 15-degree arc to produce a dataset that i ...
... 40% higher for invasive cancers and 27% higher for all cancers.2 Better lesion-margin analysis and more accurate lesion location have also been reported.4 In a tomosynthesis scan, the x-ray tube head moves over the breast, acquiring 15 low-dose images over a 15-degree arc to produce a dataset that i ...
Award Winners
... Prostate Cancer in the Transition Zone and the Anterior Fibromuscular Stroma: Clues to the Diagnosis in Multiparametric MRI with Emphasis on Intraprostatic Patterns of Spread and the Relative Frequency of the Locations H. Shinmoto, MD, Tokorozawa JAPAN; S. Soga, MD; C. Tamura; K. Yamada, MD; T. Okam ...
... Prostate Cancer in the Transition Zone and the Anterior Fibromuscular Stroma: Clues to the Diagnosis in Multiparametric MRI with Emphasis on Intraprostatic Patterns of Spread and the Relative Frequency of the Locations H. Shinmoto, MD, Tokorozawa JAPAN; S. Soga, MD; C. Tamura; K. Yamada, MD; T. Okam ...
III. Profile Details - QIBA Wiki
... beyond the scope of this document. Change may be assessed by calculating absolute volume at each time point and subtracting, or alternatively by a direct measure of change without specific regard to absolute volumes. The Profile does not intend to discourage innovation in the means by which this is ...
... beyond the scope of this document. Change may be assessed by calculating absolute volume at each time point and subtracting, or alternatively by a direct measure of change without specific regard to absolute volumes. The Profile does not intend to discourage innovation in the means by which this is ...
Quantifying spatial heterogeneity in dynamic contrast
... THEORY Heterogeneity in this work refers to the degree of spatial non-uniformity in a parameter map. Our statistics attempt to quantify this heterogeneity by accounting for both the distribution of parameter values and their spatial relationship. A 2-D grey-scale image can be thought of as being a s ...
... THEORY Heterogeneity in this work refers to the degree of spatial non-uniformity in a parameter map. Our statistics attempt to quantify this heterogeneity by accounting for both the distribution of parameter values and their spatial relationship. A 2-D grey-scale image can be thought of as being a s ...
Popular Links - UNC Health Care News
... he Department of Radiology relies not only on the teaching, clinical and research skills of its faculty, but also on their leadership expertise in supporting oversight within the Department and throughout the School of Medicine (SOM) and UNC Healthcare (UNCH). Dedicated faculty such as our own serve ...
... he Department of Radiology relies not only on the teaching, clinical and research skills of its faculty, but also on their leadership expertise in supporting oversight within the Department and throughout the School of Medicine (SOM) and UNC Healthcare (UNCH). Dedicated faculty such as our own serve ...
Impression of RSNA
... Her extensive experience and knowledge will be an asset as this vibrant division grows to deliver quality care to the greater Atlanta Metro Area. ...
... Her extensive experience and knowledge will be an asset as this vibrant division grows to deliver quality care to the greater Atlanta Metro Area. ...
Abdominal Aortoiliac Duplex Evaluation
... be observed so that scanning technique can be adjusted as necessary to optimize image quality and spectral waveform characteristics. The patient’s physical and mental status is assessed and monitored throughout the examination, with modifications made to the procedure plan according to changes in th ...
... be observed so that scanning technique can be adjusted as necessary to optimize image quality and spectral waveform characteristics. The patient’s physical and mental status is assessed and monitored throughout the examination, with modifications made to the procedure plan according to changes in th ...