Digital Imaging And Communications In Medicine (Dicom)

Top PDF Digital Imaging And Communications In Medicine (Dicom):

PS 3.5-2009 Digital Imaging and Communications in Medicine (DICOM) Part 5: Data Structures and Encoding

PS 3.5-2009 Digital Imaging and Communications in Medicine (DICOM) Part 5: Data Structures and Encoding

2. Though it would be unusual, would not take advantage of correlation between the red, green and blue components, and would not achieve effective compression, a Photometric Interpretation of RGB could be specified as long as no multi-component transformation was specified by the JPEG 2000 bit stream. 3. Despite the application of a multi-component color transformation and its reflection in the Photometric Interpretation attribute, the “color space” remains undefined. There is currently no means of conveying “standard color spaces” either by fixed values (such as sRGB) or by ICC profiles. Note in particular that the JP2 file header is not sent in the JPEG 2000 bitstream that is encapsulated in DICOM.
Mostrar más

116 Lee mas

PS 3.5-2011 Digital Imaging and Communications in Medicine (DICOM) Part 5: Data Structures and Encoding

PS 3.5-2011 Digital Imaging and Communications in Medicine (DICOM) Part 5: Data Structures and Encoding

2. Though it would be unusual, would not take advantage of correlation between the red, green and blue components, and would not achieve effective compression, a Photometric Interpretation of RGB could be specified as long as no multi-component transformation was specified by the JPEG 2000 bit stream. 3. Despite the application of a multi-component color transformation and its reflection in the Photometric Interpretation attribute, the “color space” remains undefined. There is currently no means of conveying “standard color spaces” either by fixed values (such as sRGB) or by ICC profiles. Note in particular that the JP2 file header is not sent in the JPEG 2000 bitstream that is encapsulated in DICOM.
Mostrar más

117 Lee mas

PS 3.3-2009 Digital Imaging and Communications in Medicine (DICOM) Part 3: Information Object Definitions

PS 3.3-2009 Digital Imaging and Communications in Medicine (DICOM) Part 3: Information Object Definitions

The Positron Emission Tomography (PET) Image Information Object Definition specifies an image that has been created by a Positron Tomograph imaging device, including dedicated PET cameras and Nuclear Medicine imaging devices operating in coincidence mode. This includes data created by external detection devices that create images of the distribution of administered radioactive materials, specifically positron emitters, in the body. Depending on the specific radiopharmaceuticals administered and the particular imaging procedure performed, problems involving changes in metabolism, function, or physiology can be investigated and various region pathologies can be studied. For these problems, quantitation of image data in absolute activity and physiological units is important. In addition, the PET Image IOD specifies attenuation (transmission) images used for correction and anatomical reference of emission images. A.21.2 PET Image IOD Entity-Relationship Model
Mostrar más

1286 Lee mas

PS 3.4-2011 Digital Imaging and Communications in Medicine (DICOM) Part 4: Service Class Specifications

PS 3.4-2011 Digital Imaging and Communications in Medicine (DICOM) Part 4: Service Class Specifications

However if fuzzy semantic matching of PN Attributes has been negotiated, matching by the SCP may result in responses that are not obviously related to the request, hence care should be taken if any additional filtering of responses is performed by the SCU. For example, if phonetic matching is performed, a query for “Swain” might well return “Swayne”, or if name component order insensitive matching is performed, a query for “Smith^Mary” might well return “Mary^Smith” or “Mary Smith” or “Smith, Mary”.

417 Lee mas

PS 3.6-2011 Digital Imaging and Communications in Medicine (DICOM) Part 6: Data Dictionary

PS 3.6-2011 Digital Imaging and Communications in Medicine (DICOM) Part 6: Data Dictionary

In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication.
Mostrar más

216 Lee mas

PS 3.6-2009 Digital Imaging and Communications in Medicine (DICOM) Part 6: Data Dictionary

PS 3.6-2009 Digital Imaging and Communications in Medicine (DICOM) Part 6: Data Dictionary

publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, expressed or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual

188 Lee mas

DICOM Digital Imaging and Communications in Medicine

DICOM Digital Imaging and Communications in Medicine

1993 comunicación de la imagenología médica Acr, Nema, DICOM 2003 acceso web a imágenes médicas WADO.. 2011 comunicación web de la imagenología.[r]

74 Lee mas

Anomalías de la estructura y función del hipocampo en la esquizofrenia en relación a los déficits de memoria declarativa

Anomalías de la estructura y función del hipocampo en la esquizofrenia en relación a los déficits de memoria declarativa

Diffusion tensor imaging (DTI) is a relatively new technique used to detect changes in the anisotropic diffusion of white matter. The study of the disruption of brain connectivity may increase our understanding of cognitive deficits associated with schizophrenia. Here we analysed DTI data in 25 patients with DSM-IV schizophrenia and 24 healthy controls. Two complementary measures, fractional anisotropy and apparent diffusion coefficient, were considered and analysed using voxel-based morphometry analysis of the whole brain. Declarative memory functions were also investigated and their associations with DTI data were analysed. Fractional anisotropy was significantly reduced and apparent diffusion coefficient increased in the left sub-gyral white matter of the temporal lobe, which involves the posterior part of the fornix. In the schizophrenic group, females had lower FA than males in the genu of the corpus callosum. Memory functions correlate with FA values. These data provide further evidence for the disruption of white matter connectivity in the left medial temporal lobe, and for its contribution to the declarative memory deficit in schizophrenia.
Mostrar más

157 Lee mas

Detection of breast lesions in medical digital imaging using neural networks

Detection of breast lesions in medical digital imaging using neural networks

classification is a special case of function approximation where the function’s output y is restricted to one of M (M ≥ 2) discrete values (or classes). A neural network for solving classification problems typically has N input neurons and M output neurons. The kth output neuron (1 ≤ Κ ≤ Μ ) is trained to output one (while all the other output neurons are trained to output zero) for patterns belonging to the kth class. A single output neuron suffices in the case of problems that involve two category classifications. The multilayer perceptron facilitates the classification of nonlinear problems; the more hidden layers in a neural network, the simpler it will be to isolate the problem (Figure 4).
Mostrar más

10 Lee mas

Annual Update in Intensive Care and Emergency Medicine 2017

Annual Update in Intensive Care and Emergency Medicine 2017

There are few data regarding the prevalence and time course of anemia after in- tensive care. One study showed that 77% of patients were still anemic at hospital discharge and that nearly half the patients who were in the ICU for seven or more days had hemoglobin concentrations < 10.0 g/dl [39]. In a study looking at pa- tients mechanically ventilated > 24 h and discharged from ICU with hemoglobin concentrations < 10.0 g/dl, half the patients were still anemic at six months [40]. The anemia was predominantly normochromic and normocytic, consistent with on- going inflammation, inappropriate erythropoietin response and poor marrow RBC production, although the contribution of iron deficiency is difficult to ascertain in these states. These patients had a reduced mean SF-36 score at both 3 and 6 months compared to the normal population. Studies looking at HRQOL for anemia and other chronic disease such as malignancy [41] and end-stage renal disease [42] consistently show an association between hemoglobin concentrations and HRQOL. Fatigue is a prevalent symptom among survivors, and many of the physical features of the post-ICU syndrome are typical of anemia [43]. However, the causal associa- tion between anemia and fatigue, and reduced HRQOL, in this patient group are not well studied. Equally, there are no high quality studies exploring whether interven- tions to treat and correct anemia, whether with RBC transfusion or non-transfusion interventions such as iron or erythropoietin, can modify these important outcomes. Cost-effectiveness
Mostrar más

520 Lee mas

Annual Reports 2003 2007  Department of Computer Science and Engineering

Annual Reports 2003 2007 Department of Computer Science and Engineering

Quality improvement of clinical practice guidelines Guidelines are documents issued by medical organisations containing recommenda- tions about diagnosis tests or interventions to perform under par- ticular clinical circumstances. These recommendations are based on the best empirical evidence available at the moment. A crucial con- dition for the success of guidelines is that they fulfill strong quality requirements. However, in general guidelines are written in natural language and hence they are often error-prone. Recent efforts have been made to tackle this problem. However, these initiatives are not sufficient since they still rely on informal procedures and notations. The approach we take relies on formal representation languages for guidelines which allow for a systematic verification and validation thereof. M. Marcos in collaboration with Prof. F. van Harmelen (Vrije Universiteit Amsterdam), Dr. P. Lucas (Katholieke Univer- siteit Nijmegen), Prof. S. Miksch (Vienna University of Technology), Prof. W. Reif (University of Augsburg) and K. Rosenbrand (Dutch Institute for Healthcare CBO).
Mostrar más

118 Lee mas

The Human Genome and Advances in Medicine: Limits and Future Prospects

The Human Genome and Advances in Medicine: Limits and Future Prospects

The HGP’s initial objectives were fulfilled 2 years ahead of schedule, and, in addition to compiling a highly accurate sequence of the human genome which has been made freely available and accessible to everyone, the Consortium has developed a set of new technologies and has constructed genetic maps of the genomes of various organisms. Moreover, this program of scientific investigation is linked to a parallel bioethics program. It is also interesting to note that, thanks to advances in technology, this result was achieved for a cost lower than the initial budget, which estimated that 500 Mb would be sequenced annually at a cost of 0.25 dollars per finished base. The final figure was 1400 Mb per year at a cost of 0.09 dollars per base. The size and scope of the HGP has also provided valuable lessons about the organization and management
Mostrar más

6 Lee mas

Informe d'Autors UOC a ISI Web of Knowledge  Maig 2012

Informe d'Autors UOC a ISI Web of Knowledge Maig 2012

Borrell, C.; Espelt, A.; Rodriguez-Sanz, M.; Burstrom, B.; Muntaner, C.; Pasarin, M. I., et al. (2009). Analyzing differences in the magnitude of socioeconomic inequalities in self-perceived health by countries of different political tradition in Europe. International Journal of Health Services, 39(2), 321-341. DOI:10.2190/HS.39.2.f

5 Lee mas

Stereoscopy and refocusing from axial scanning in 3D imaging

Stereoscopy and refocusing from axial scanning in 3D imaging

En el presente trabajo, usamos una cámara monocular junto a una lente de foco ajustable eléctricamente (ETL) para adquirir un stack multifoco sin desplazamientos mecánicos, evitando vibraciones y problemas de registro durante en la adquisición. Es posible decodificar y reconstruir nuevas imágenes de interés a través de algoritmos de procesamiento digital con bases físicas. Operaciones en el dominio de Fourier en combinación con el conocimiento de las distancias focales empleadas para barrer el eje óptico, permiten la redistribución de la información en el stack original. De esta forma, a partir de un stack multifoco, es posible reenfocar digitalmente la escena, a través de aperturas sintetizadas digitalmente con diferentes formas y tamaños, obteniendo por ejemplo una imagen con la profundidad de campo extendida (cámara pinhole). También consideramos desplazamientos digitales del pinhole para cambiar la perspectiva de la escena 3D y obtener pares de imágenes estereoscópicas (imágenes para el ojo izquierdo y derecho) como caso particular. Finalmente, también es posible combinar ambas implementaciones y reconstruir la escena como si hubiera sido capturada tanto desde una perspectiva diferente como con una apertura diferente simultáneamente.
Mostrar más

6 Lee mas

Assembling models of embryo development: Image analysis and the construction of digital atlases

Assembling models of embryo development: Image analysis and the construction of digital atlases

This review is organized as follows: "Classification of digital atlases, Animal models, Imaging modalities, Spatial scopes and resolutions, Developmental stages, Data types, and[r]

12 Lee mas

Narrative of Southeastern Mexican patients with ostearthritis: A focus group interview study

Narrative of Southeastern Mexican patients with ostearthritis: A focus group interview study

however, in a robust quest to cure disease and extend life, its attention seems to have fallen by the wayside. In some cases, medical treatments exclusively focused on the physical dimension of illness may ameliorate bodily symptoms; notwithstanding, at the cost of exacerbating emotional suffering (9). Within this framework, Narrative Medicine (or Narrative-Based Medicine) has developed as a theoretical and operative approach aiming at introducing into daily medical practice the use of narrative as a tool to collect and interpret information from the patient's point of view (10). Narrative Medicine serves to accompanying the patient through the experience of his/her illness, listening to his/her story in a simplified therapeutic role. People are essentially storytellers, and the content of the stories they tell and listen shape their attitude towards their lives. This becomes particularly relevant in patients who are suffering of painful and disabling chronic illnesses, such as OA.
Mostrar más

7 Lee mas

Advances in the Simultaneous Multiple Surface optical design method for imaging and non-imaging applications

Advances in the Simultaneous Multiple Surface optical design method for imaging and non-imaging applications

Since etendue squeezer should not change the size of exit aperture based on the conservation of etendue, we need to restrict emitting area of étendue-squeeze to be circular by putting a planar absorber at the exit with a central 200mm radial hole, as shown in Fig 6.15. It’s interesting to observe saw-teeth near field irradiance pattern on a dummy plane very close to the exit surface of etendue-squeezer, when the incoming ray-bundles are circular from previous collimator. The appearance of this saw-teeth contour is due to the limited number of array units inside the circular exit aperture. This mismatch between exit circular aperture and saw-teeth near field irradiance pattern will also contribute to a certain efficiency loss, which we call it “saw-teeth loss”. Increasing the number of lenslet units can reduce the size of saw- teeth. It can also be observed a central black area which corresponds to the blocking by the first grooved lens of collimator. In the following analysis, 1324 units of lenslet are placed within the exit aperture, reducing the “saw-teeth” loss to approximately 1%. Each lenslet has a 2.4 centimeters central thickness.
Mostrar más

171 Lee mas

Connecting inquiry based learning with collaborative work in online education

Connecting inquiry based learning with collaborative work in online education

9 The Universitat Oberta de Catalunya (UOC) is a fully online university settled in 1995. UOC developed a new brand educational model in which the concept –and the tool- of Virtual Campus was the main element, using the Information and communication Technologies (ICT), particularly the Internet, as a means to make students, online tutors and instructors interact between them. This particular educational model was developed from its very beginning and has been continuously improved. Student enrolment has dramatically grown up during these years, starting with 200 students in 1995 and having over 60,000 right now.
Mostrar más

26 Lee mas

TítuloTechnologies for participatory medicine and health promotion in the elderly population

TítuloTechnologies for participatory medicine and health promotion in the elderly population

Currently there are numerous commercial solutions for monitoring health parameters of users through sensor devices capable of transmitting data to other devices, such as a mobile phone or a computer. Among these solutions are quantifying bracelets for physical exercise and/or sleep, scales, glucometers, tensiometers, heart rate monitors, ans so on. [11] . However, the 3 research lines that we are considering in this study are neither adequately nor completely covered today by commercial devices. Therefore, a signi fi cant part of the research work consists of being able to define, based on the requirements indicated by the participating health professionals, a set of “models” of sensors capable of measuring the pertinent parameters, which is not possible by using only commercial solutions. On the other hand, the personal and non-transfer- able use that is going to be made of the sensors by the users forces the costs of the same to be moderate, which limits the range of devices that can be included. What matters, in short, are reliable and affordable sensor devices for the end user, without neglecting technology and efficiency. [10]
Mostrar más

7 Lee mas

Titles in research and review articles in veterinary medicine : a corpus-based study

Titles in research and review articles in veterinary medicine : a corpus-based study

Titles of research and review articles that satisfy the features of precision, information and easy-indexation require the mastering of certain linguistic and pragmatic skills from the researcher-writer. The mastering of this communicative competence exerts a demand especially on junior researchers at two important activities of their daily efforts: decoding and encoding titles when doing bibliographic searches and getting their own findings published.

9 Lee mas

Show all 10000 documents...