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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Desenvolvimento e implementação de um editor de documentos estruturados no padrão Dicom Structured Report

Bortoluzzi, Mariana Kessler January 2003 (has links)
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação. / Made available in DSpace on 2012-10-20T12:22:07Z (GMT). No. of bitstreams: 1 195362.pdf: 1894061 bytes, checksum: a79f99dd7cf59ec149b7f2d4113ad4df (MD5)
42

Modelagem e implementação orientada a objetos de um cliente de rede para banco de dados de imagens médicas digitais utilizando o padrão Dicom 3.0

Sampaio, Sílvio Costa January 1999 (has links)
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. / Made available in DSpace on 2012-10-19T02:34:21Z (GMT). No. of bitstreams: 0Bitstream added on 2016-01-09T03:37:42Z : No. of bitstreams: 1 176125.pdf: 10293707 bytes, checksum: 112a06fa7e1594076927bba0f76cd969 (MD5) / Desenvolvido no escopo do projeto Cyclops, um Projeto de cooperação Brasil-Alemanha direcionado ao desenvolvimento de ferramentas para suporte ao diagnóstico médico por imagem, este trabalho apresenta uma modelagem do padrão DICOM 3.0 (Digital Imaging Communications in Medicine) verdadeiramente orientada a objetos, além da implementação, utilizando linguagem Smalltalk, do software DicomEditor para validação do modelo desenvolvido.
43

Reconstrução 3D de imagens médicas

Reis, Lidiane Pereira dos January 2001 (has links)
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação. / Made available in DSpace on 2012-10-19T09:20:41Z (GMT). No. of bitstreams: 0Bitstream added on 2014-09-26T00:13:55Z : No. of bitstreams: 1 184278.pdf: 26388451 bytes, checksum: ac9ec96e699cbd184b0514b9e32b2519 (MD5) / Atualmente imagens médicas provenientes de aparelhos radiológicos podem trazer grandes avanços na medicina. A visualização de imagens médicas em diferentes planos bidimensionais (axial, coronal, sagital) e em três dimensões (3D) tem se tornado uma grande ferramenta para o auxílio ao diagnóstico médico, e o melhor esclarecimento das relações espaciais entre diferentes estruturas anatômicas de um determinado paciente, pois possibilita um auxílio aos profissionais na análise das imagens radiológicas, fornecendo meios mais precisos de medir a extensão e volume de uma determinada anatomia ou patologia em tais regiões, permitindo ao médico uma visão mais detalhada. Neste contexto, o presente trabalho consiste no desenvolvimento uma metodologia que possa determinar, parametrizar e coordenar os diversos métodos adequados capazes de manipular e reconstruir imagens médicas, representando anatomias e patologias a partit de Tomografias Computadorizadas. Desta forma, a disponibilização de uma ferramenta de software dentro deste cenário de radiologia é de fundamental importância para auxiliar diagnósticos médicos.
44

Effect of display type and room illuminance in viewing digital dental radiography:display performance in panoramic and intraoral radiography

Kallio-Pulkkinen, S. (Soili) 17 November 2015 (has links)
Abstract Today, digital imaging is widely used in dentistry. In medical radiography, the importance of displays and room illuminance has been shown in many studies, whereas the effect of these factors in the diagnosis of dental radiography is not clear and remains controversial. There is limited knowledge among dentists as to how observer performance is affected by the type of display, level of ambient light or grayscale calibration. The aim of this thesis was to compare observer performance in the detection of both anatomical structures and pathology in panoramic and bitewing radiographs using consumer grade display with γ 2.2- and DICOM-calibration, a tablet (3rd generation Apple iPad® and a 6 MegaPixel (MP) display under different lighting conditions. Furthermore, the thesis aimed at providing recommendations for type of display and acceptable illuminance levels in the room for interpretation of dental radiographs. Thirty panoramic and bitewing radiographs were randomly evaluated on four displays under bright (510 lx) and dim (16 lx) ambient lighting by two observers. Both anatomical structures and pathology were evaluated because they provided both low- and high-contrast structure. Consensus was considered as reference. Intra- and inter-observer agreement was determined. The proportion of equivalent ratings and weighted kappa were used to assess the reliability. The level of significance was set to P<0.05. DICOM calibration may improve observer performance in the detection of pathology in panoramic radiographs regardless of the room illuminance level. DICOM calibration improves the detection of enamel and dentinal caries in bitewing radiographs, particularly in bright lighting conditions. On the other hand, in dental practice the room illuminance level is often higher, and it is thus recommended that the overall lighting level should be decreased. Furthermore, a DICOM-calibrated consumer grade display can be used instead of a medical display in dental practice without compromising the diagnostic quality and it saves costs. Tablet displays are recommended to use with care in dental radiography. / Tiivistelmä Hammaslääketieteessä käytetään nykyään pääasiassa digitaalista kuvantamista. Lääketieteellisessä radiologiassa näyttöjen ja käyttöympäristön valaistuksen merkitys kuvien katseluun on osoitettu lukuisissa tutkimuksissa, kun taas hammaslääketieteellisten tutkimusten tulokset näiden tekijöiden vaikutuksista röntgenkuvien tulkintaan eivät ole yksiselitteisiä ja niissä on ristiriitaisuutta. Hammaslääkäreiden tiedot näyttöjen, kalibroinnin ja ympäröivän valaistuksen vaikutuksesta röntgenkuvan tulkintaan ovat puutteellisia. Tämän väitöskirjan tarkoituksena oli vertailla näyttöjen suorituskykyä panoraama- ja purusiivekekuvien tulkinnassa eri valaistusolosuhteissa. Tutkimuksessa vertailtiin γ 2.2- ja DICOM-kalibroitua perusnäyttöä, tablettia (kolmannen polven Apple iPad®) sekä 6 MegaPikselin (MP) lääketieteelliseen käyttöön tarkoitettua näyttöä. Lisäksi väitöskirjan tarkoituksena oli antaa hammaslääketieteellisten röntgenkuvien katseluun soveltuvia näyttöjä ja käyttöympäristön valaistusta koskevia suosituksia. Kaksi tulkitsijaa arvioi 30 panoraama- ja purusiivekeröntgenkuvaa satunnaisessa järjestyksessä neljältä eri näytöltä kirkkaassa (510 luksia) ja hämärässä (16 luksia) valaistuksessa. Tutkimuksessa arvioitiin sekä korkeakontrastisia anatomisia rakenteita että matalakontrastisia patologisia löydöksiä. Tuloksia verrattiin tutkijoiden väliseen yhteisluentaan. Luotettavuuden arviointiin käytettiin yhdenmukaisuusosuutta sekä painotettua kappaa. Toistettavuuden arvioimiseksi laskettiin kapat toisen alkuperäisten ja uusintaluentojen sekä molempien tulkitsijoiden alkuperäisluentojen välille. Merkitsevyystasoksi määriteltiin p<0,05. DICOM-kalibrointi voi parantaa patologisten löydösten tulkintaa panoraamakuvissa molemmissa valaistusolosuhteissa. DICOM-kalibrointi parantaa selvästi purusiivekekuvien hammaskiille- ja hammasluukarieksen tulkintaa erityisesti kirkkaassa valaistuksessa. Hammaslääkäreiden työskentelytilojen valaistus on yleensä korkeampi kuin tutkimuksessa käytetty, joten näyttöjen käyttöympäristön valaistusta tulisi laskea toimistovalaistusta vastaavaksi. DICOM-kalibroitua perusnäyttöä voidaan suositella käytettäväksi kalliiden medikaalinäyttöjen sijaan. Tablettia tulee sen sijaan käyttää harkiten hammaskuvien tulkintaan.
45

Variation in accumulated dose of volumetric-modulated arc therapy for pancreatic cancer due to different beam starting phases / 膵臓癌に対する強度変調回転放射線治療における異なる照射開始位相に起因した累積線量の変動

Sasaki, Makoto 23 March 2020 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(人間健康科学) / 甲第22390号 / 人健博第76号 / 新制||人健||5(附属図書館) / 京都大学大学院医学研究科人間健康科学系専攻 / (主査)教授 椎名 毅, 教授 精山 明敏, 教授 富樫 かおり / 学位規則第4条第1項該当 / Doctor of Human Health Sciences / Kyoto University / DFAM
46

An Image Processing-based Approach for Additive Manufacturing of Cranial Implants

Ghalsasi, Omkar 05 October 2021 (has links)
No description available.
47

Pokročilé možnosti zabezpečení medicínských obrazových dat / Advanced Security Methods of Medical Image

Roček, Aleš January 2017 (has links)
Medical institutions adapt digital based archiving of patients records images to fulfil its advantages like availability, easy sharing, high resolution etc. Digital form of records brings apart from advantages also disadvantages at security risks. It is easier attacking, stealing, using without authorization etc. This thesiss deals with this security issues, describes the needs and approaches to security, explains the reasons for deployment of watermarking. It names three main methods of medical image watermarking and compares their plus and cons: zero, reversible and watermarking in Region Of Non Interest (RONI). New method of Zero-reversible-RONI watermarking, that combine advantages of described methods, is proposed. For practical tests of properities of proposed method was used huge database of medical images. Application of the proposed method on this database delivers very promising results. Practical results discussion and comparison with other medical imaging watermarkikng methods are at the end of this thesis.
48

A Patient Specific Treatment Planning Method for BNCT Utilizing MCNP and RayStation

Seekamp, James M. January 2020 (has links)
No description available.
49

Wavelet Based SPIHT Compression for DICOM Images

Dhasarathan, Iyyappan, Rathinasamy, Vimal, Cui, Tang January 2011 (has links)
Generally, image viewers do not include the scalability for the image compressionand ecient encoding and decoding for easy transmission. They alsonever consider the specic requirements of the heterogeneous networks constitutedby the Global Packet Radio Service(GPRS), Universal Mobile TelecommunicationSystem(UMTS), Wireless Local Area Network(WLAN) and DigitalVideo Broadcasting(DVB-H). This work contains the medical application withviewer for the Digital Imaging and Communications in Medicine(DICOM) imagesas its core content. This application discusses the scalable wavelet-basedcompression, retrival and the decompression of the DICOM images. This proposedapplication is compatible with the mobile phones activated in the heterogeneousnetwoks. This paper also explains about the performance issues whenthis application is used in prototype heterogenous networks.
50

Evaluation of 18F-FDG PET Agent in Cardiac Gated Imaging

Lin, Jonathan Lee 16 August 2012 (has links)
No description available.

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