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Submitted in partial compliance with the requirements for the Master’s Degree in Technology: Chiropractic, Durban University of Technology, 2017. / Radiographs are the most commonly used modalities for the purpose of diagnosing skeletal disorders. Radiographs are important for chiropractors to exclude any contra-indications prior to spinal manipulative therapy. If contra-indications are found treatment is modified to what best suits each patient. There is a gap in the literature regarding chiropractors reading the same set of radiographs and agreeing on findings. Objectives The study investigated inter- and intra-examiner reliability of lumbar spine radiograph analysis by chiropractors and its impact on clinical management. Methods Inter- and intra-examiner examination of radiographs occurred in two rounds separated by two weeks. Six chiropractors read the same 30 radiographs and clinical history was only available in the second round. Results Inter-observer agreement for categorisation for Round One was 96.78% and Round Two 89.49%. Inter-observer agreement in management was 96.45% in round one and 96.00% in Round two. Agreement between chiropractors had no statistically significant difference. Identification average improved from 0.09 to 0.89 kappa. Overall specificity was relatively high and sensitivity was relatively low. Conclusion Reliability/Agreement between chiropractors was strong in both rounds. Categorising of the diagnosis improved from poor to substantial from Round One to Round Two. Case history improved the accuracy of interpreting the radiographs although this change was not statistically significant. / M

Atualmente observa-se que as queixas de afecção física mais comuns do aparelho locomotor na clínica médica e do esporte, entre adultos jovens e adolescentes ativos, estão relacionadas ao joelho, sendo o sintoma de dor femoropatelar, a mais freqüente. Porém, essa condição é uma incógnita, para os especialistas em joelho, quando se tenta definir uma causa específica e de consenso. Como forma de tentar contribuir na elucidação desse problema resolveu-se executar este trabalho investigativo, buscando-se encontrar diferenças clínicas e biomecânicas entre indivíduos do sexo feminino, com e sem o referido sintoma, com idade entre 15 e 20 anos. Foram avaliadas 23 jovens com dor femoropatelar bilateral, sem afecção conhecida presente e 20 sem sintoma (46 joelhos sintomáticos e 40 assintomáticos). Todas foram submetidas a exames radiográficos (incidências: antero-posterior, perfil e axial), onde se verificou o alinhamento femorotibial, a altura patelar, o ângulo do sulco, o ângulo de congruência, e o ângulo femoropatelar lateral. Também se mensurou a retração dos isquiotibiais e o ângulo Q em exame clínico e, os indivíduos da pesquisa ainda se submeteram a avaliação da força, por dinamometria isocinética, dos grupos musculares extensores e flexores do joelho e do quadril, além dos rotadores mediais e laterais e os adutores e abdutores do quadril. Após análise dos resultados, pode ser observado que as diferenças, estatisticamente significativas, entre os grupos estudados, foram quanto ao alinhamento do membro inferior, com o ângulo Q apresentando um p < 0,001, o ângulo femoropatelar lateral com um p = 0,006, o ângulo do sulco com o p < 0,001, o ângulo de congruência com o p = 0,027 e, o único parâmetro diferente estatisticamente na dinamometria isocinética, foi o ângulo do pico de torque da extensão do quadril, com um p = 0,03. De acordo com os resultados da comparação entre o grupo sintomático e o assintomático, observa-se que há uma relação importante do mau alinhamento da articulação do joelho com a sintomatologia estudada, porém não pode ser apontado um ou outro ângulo como o mais importante para o surgimento da dor, ou talvez ainda possa ser dito que estes desalinhamentos predispõem o joelho ao sintoma, mas talvez não sejam as causas primárias da afecção. Ficou demonstrado que o aumento do ângulo Q e o encurtamento dos isquiotibiais não são causas de dor femoropatelar. Foi verificado que indivíduos com e sem o sintoma não apresentam diferença quanto a força muscular de músculos envolvidos na ação do quadril e do joelho. O ângulo femoropatelar lateral apresentou média maior no grupo assintomático, enquanto que a média do ângulo do sulco, no mesmo grupo, foi menor. Já o ângulo de congruência apresentou média positiva no grupo assintomático e negativa no grupo com dor, mostrando que a patela do grupo com dor, tem seu ápice mais medializado que a do grupo controle / Presently it has been observed that the most common physical affection in the locomotor system in medical and sportive clinic, among active young adults and adolescents are related to the knee, being femoropatellar pain symptom the most frequent. Although, this condition is unknown for those who are specialists in knee when they try to identify a specific cause and an agreement. As a way of trying to contribute for the elucidation of this problem, it has been decided to execute this investigative study trying to find clinic, radiographic and isokinetic differences among female individuals, with and without the above mentioned symptom, between 15 and 20 years old. 23 young females with bilateral femoropatellar pain were analyzed, with unknown affection, and 20 without symptoms (46 symptomatic knees and 40 asymptomatic). All of them were submitted to radiographic exams (anteroposterior, profile and axial incidences), were it was verified the femorotibial alignment, the patellar height, the groove angle, the congruence angle and the femoropatellar lateral angle. It was also measured the hamstring shortness and Q angle in clinic exam and, the individuals of this study were submitted to strength evaluation, by isokinetic dynamometry of the extensor and flexor muscles of knees and hips, besides hip medial and lateral rotators and the adducts and abducts. After analyzing the results, it can be observed that the statistically significant differences among studied groups were related to the inferior member alignment, with the Q angle presenting p value < 0,001, the femoropatellar lateral angle p value = 0,006, the groove angle p value < 0,001, the congruence angle p value = 0,027 and, the only one statistically different parameter in isokinetic dynamometry was the torque peak angle of hip extension with p value = 0,03. According to the results of comparison between symptomatic and asymptomatic groups there is an important relationship between bad alignment of the knee joint with the studied symptomatology, but it cannot be appointed one or another as the most important for the appearing of the pain, or maybe it still can be said that these disarrangements can predispose the knee to the symptom, but maybe they are not the primary causes of the affection. It was shown that the raise of the Q angle and the hamstring shortness are not the causes of femoropatellar pain. It was verified that individuals with or without the symptom do not show difference in relation to the muscular strength of the involved muscles in movement of the hip and knee. The femoropatellar lateral angle presented higher average in the asymptomatic group, while the average of the groove angle, in the same group, was smaller. Yet the congruence angle presented a positive average in the asymptomatic group and a negative average in the group with pain, showing that the patella in the group with pain has its apex more medially than the control group

No description available.

A new method for the general application of quadratic spatial/spatial frequency domain filtering to imagery is presented in this dissertation. The major contribution of this research is the development of an original algorithm for approximating the inverse psuedo Wigner distribution through synthesis of an image in the spatial domain which approximates the result of filtering an original image in the DPWD domain.

No / Awareness is growing of the importance of patient centered care (PCC) in diagnostic radiography. PCC is embedded within professional body publications and guidance documents, but there is limited research evidence exploring the perceptions of student radiographers and radiography academics. Methods: This paper reports Stage 1 and Stage 2 of the project from the perspective of radiography academic and student radiographer participants, and compares these to the perspectives of service users, clinical radiographers and radiography managers reported previously. Stage 1 used an online survey tool to gauge participant agreement with a series of attitudinal statements. Stage 2 used situational vignettes to promote discussion and debate about PCC approaches. Results: Response rates to the Stage 1 survey were above the minimum threshold, with 50 responses from student radiographers and 38 responses from radiography academics. Stage 1 participants were asked to participate in Stage 2 on a voluntary basis. As with service users and service deliverers, care communication, event interactions and control over environment were the key influences on PCC. However, students highlighted differences between reported and observed levels of PCC. Conclusion: There is some way to go to embed PCC in diagnostic radiography practice. As impartial observers of radiography practice, student radiographers highlight the difference between service users and service deliverer's perceptions of PCC. Whilst the focus of clinical radiographers remains on efficiency, it is difficult for student radiographers to challenge the accepted norm. Role models are required to promote PCC behaviours and a holistic approach in radiography practice. Implications for practice: A package of educational support and audit tools will be made available to support both service deliverers and student radiographers to deliver PCC

[Truncated abstract] In this thesis, we introduce a mammogram analysis system developed for the automatic segmentation and analysis of mammograms. This original system has been designed to aid radiologists to detect breast cancer on mammograms. The system embodies attribute-driven segmentation in which the attributes of an image are extracted progressively in a step-by-step, hierarchical fashion. Global, low-level attributes obtained in the early stages are used to derive local, high-level attributes in later stages, leading to increasing refinement and accuracy in image segmentation and analysis. The proposed system can be characterized as: • a bootstrap engine driven by the attributes of the images; • a solid framework supporting the process of hierarchical segmentation; • a universal platform for the development and integration of segmentation and analysis techniques; and • an extensible database in which knowledge about the image is accumulated. Central to this system are three major components: 1. a series of applications for attribute acquisition; 2. a standard format for attribute normalization; and 3. a database for attribute storage and data exchange between applications. The first step of the automatic process is to segment the mammogram hierarchically into several distinctive regions that represent the anatomy of the breast. The adequacy and quality of the mammogram are then assessed using the anatomical features obtained from segmentation. Further image analysis, such as breast density classification and lesion detection, may then be carried out inside the breast region. Several domain-specific algorithms have therefore been developed for the attribute acquisition component in the system. These include: 1. automatic pectoral muscle segmentation; 2. adequacy assessment of positioning and exposure; and 3. contrast enhancement of mass lesions. An adaptive algorithm is described for automatic segmentation of the pectoral muscle on mammograms of mediolateral oblique (MLO) views

The purpose of the project was to design a curriculum guideline for educators to teach computed radiography. This project can be used as a stand-alone course, or integrated into existing radiologic technology courses.

Call number: LD2668 .T4 1964 R47 / Master of Science