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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.
351

Omhändertagande i samband med röntgenundersökning : en litteraturstudie / Caring in connection with diagnostic imaging examination : a litterature study

Blom, Elena, Svensson, Jenny January 2021 (has links)
Bakgrund: Röntgensjuksköterskan måste på kort tid bilda en förståelse för patienten och dennes behov för att kunna tillämpa ett gott omhändertagande. Det finns många delar inom omhändertagandet som måste appliceras för att kunna säkerställa en patientsäker vård. Syfte: Syftet med litteraturstudien var att belysa röntgensjuksköterskans erfarenheter av omhändertagande av patient i samband med röntgenundersökning.   Metod: En litteraturstudie innehållande nio kvalitativa studier. Sökningarna genomfördes i Pubmed, Cinahl och Scopus.  Resultat: Analysen resulterade i tre kategorier och sex underkategorier. Kategorierna bestod av: Medvetenhet om ansvaret, Känna krav på att vara och Hantera utmaningar. Konklusion: Hur röntgensjuksköterskan kommunicerar med patienten har en stor betydelse för hur mottaglig patienten blir mot den information som delges. Att ta sig tid att läsa av individen och dennes behov kan bidra till ett bättre omhändertagande. En tydligare beskrivning inom området som kan ge en vägledning vid olika patientmöten skulle kunna vara en tillgång för nyutexaminerade.  Nyckelord: erfarenheter, radiografi, röntgenundersökning, omhändertagande, röntgensjuksköterska / Background: The radiographer must in a short time form an understanding of the patient and his or her needs in order to be able to apply good care. There are many parts of care that must be applied to be able to ensure patient-safe care. Aim: The purpose of the literature study was to illuminate the radiographers’ experiences of the care of patients in connection with an diagnostic imaging examination. Method: A literature study containing nine qualitative studies. The searches were conducted in Pubmed, Cinahl and Scopus. Result: The analysis resulted in three categories and six subcategories. The categories consisted of: Awareness of responsibility, Feel the need to be effective and Handle challenges. Conclusion: How the radiographer communicates with the patient is of great importance for how receptive the patient becomes to the information provided. Taking the time to read the individual and his needs can contribute to better care. A clearer description in the area that can provide guidance at various patient meetings could be an asset for recent graduates. Keywords: experience, radiography, diagnostic imaging examination, caring for, radiographer
352

A contribuição da ultrassonografia na avaliação dos ligamentos do cotovelo: estudo comparativo com ressonância magnética / The contribution of ultrasonography in the evaluation of elbow ligaments: a comparative study with magnetic resonance imaging

Brandão, Aureliano Torquato 13 March 2019 (has links)
A ressonância magnética (RM) é o exame de escolha para avaliar os ligamentos do cotovelo. Os dados da literatura que relatam o uso da ultrassonografia (US) avaliando os ligamentos do cotovelo são escassos. A maioria dos estudos de US avalia apenas alguns aspectos dos ligamentos do cotovelo, principalmente relacionados a tendões, espaços articulares e, eventualmente, lesões ligamentares. O objetivo é avaliar o desempenho do US em demonstrar todos ligamentos do cotovelo em comparação com os resultados da MRI. Realizamos análises qualitativas e quantitativas das imagens do ligamento do cotovelo obtidas pelo US e RM em indivíduos assintomáticos. Na abordagem qualitativa, os dados de RM e US foram analisados por quatro radiologistas especializados em sistema musculoesquelético: dois para US e dois para RM. Cada médico realizou de forma independente e individualmente usando um relatório estruturado. A abordagem quantitativa incluiu medidas da espessura das fibras anteriores do ligamento colateral ulnar mediano e os locais exatos dessas medidas, realizados por radiologistas treinados para a avaliação quantitativa. Todos os ligamentos foram identificados pelos examinadores e houve alta concordância entre os métodos nas análises qualitativas e quantitativas: ecogenicidade e espessura do ligamento em imagens de US e espessura do ligamento e sinal em imagens de RM. A medida de concordância das espessuras dos ligamentos entre os examinadores da US foi superior a 97,8%. Entre os examinadores da RM, esta medida foi superior a 99,0%. A média da diferença entre as medidas de US e de RM foi de 0,08 mm (entre 0,04 mm e 0,12 mm). Não houve diferenças estatísticas entre os 2 métodos nas medidas de concordância e espessura dos ligamentos. Concluímos que a US é capaz de identificar ligamentos íntegros em adultos com a mesma facilidade e especificidade que a RM. Acreditamos que esses resultados, juntamente com as características já conhecidas do US (avaliação dinâmica da integridade do ligamento, menos contraindicações e baixo custo) têm potencial para adicionar um valor importante ao diagnóstico musculoesquelético da doença do cotovelo em um cenário mais difundido / Magnetic resonance imaging (MRI) is the exam of choice for assessing elbow ligaments. The literature data reporting the use of Ultrasonography (US) evaluating elbow ligaments is scarce. Most US studies evaluate only a few aspects of the elbow ligaments, mostly related to tendons, joint spaces and, eventually, ligament lesions. The main goal is to assess US performance to demonstrate elbow ligaments compared to MRI performance. We have conducted qualitative and quantitative analysis of the elbow ligaments images obtained by the US and MRI in healthy volunteers. In the qualitative approach, MRI and US data was analyzed by four radiologists specialized in musculoskeletal system: two for US and two for MRI. Each physician analyzed the images independently and individually using a structured report. The quantitative approach included measurements of the thickness of the anterior fibers of the medial ulnar collateral ligament and all measures was performed by trained radiologists for quantitative assessment. All ligaments were identified by the radiologists and there was high agreement between the methods in the qualitative and quantitative analyzes: echogenicity and thickness of the ligament in US images and ligament thickness and signal in MRI images. The concordance in the measurements of the thicknesses of the ligaments between the examiners of the US was superior to 97.8%. Among the MRI examiners, it was higher than 99.0%. The mean difference between the US and MRI measurements was 0.08 mm (between 0.04 mm and 0.12 mm). There was no statistical difference either in concordance or ligament thickness between US and MRI measures. We conclude that ultrasonography is capable of identifying healthy ligaments in adults with the same usability and specificity as magnetic resonance imaging. We believe these results, together with US already known characteristics (dynamic evaluation of ligament integrity, fewer contra-indications and low cost) has potential to add an important value to musculoskeletal diagnosis of elbow disease
353

T1rho MRI in brain aging, lumbar disc degeneration, and liver fibrosis: clinical and experimental studies.

January 2013 (has links)
T1rho弛豫是旋轉坐標系中的自旋晶格弛豫,它決定橫向磁化向量在存有自旋鎖定射頻脈衝情況下的衰減,自旋鎖定脈衝與橫向磁化向量同向。T1rho磁共振成像對於低頻運動過程敏感,故可研究水與其周大分子物質環境間的交互作用,有鑒別組織內早期生化改變的潛力。 / 衰老與慢性高血壓是常見腦退行性疾病的兩個主要危險因素。但是正常腦衰老過程及慢性高血壓兩個因素與腦組織T1rho是否有相關性,尚缺乏研究。序貫性測量SD老鼠自5至15月齡、WKY(血壓正常)和SHR(患有自發性高血壓)老鼠自6至12月齡的雙側丘腦、海馬、和皮質的腦組織T1rho值。發現三組老鼠的丘腦、海馬及皮質的T1rho均隨年齡增長而增高;且SHR的顯著高於WKY老鼠。 / T1rho值與椎間盤退變等級的相關性已有報導。但相比T2值,T1rho在評價椎間盤退變方面是否優於或如何優於T2值尚缺乏研究。將椎間盤髓核及纖維環的T1rho和T2值與5級和8級椎間盤退變等級系統做比較;發現髓核的T1rho及T2與椎間盤退變等級的相關性均呈二次函數降低,且無顯著差別(P=0.40)。纖維環的T1rho及T2與椎間盤退變等級的相關性呈線性函數降低,T2降低的斜率明顯比T1rho降低的斜率要平坦(P<0.001)。故T1rho值比T2值更加適合評價纖維環退變,而兩者在評價髓核時相似。 / 肝纖維化是幾乎所有慢性肝病的常見特徵,包括大分子物質在細胞外基質的沉積。選用四氯化碳CCl4腹腔注射6周來製造肝纖維化模型。肝臟T1rho在注射後的第二天輕度上升,然後持續上升,直到注射六周後T1rho達最高值,此後T1rho隨CCl4注射停止而降低。顯示T1rho磁共振成像對於監測慢性注射CCl4誘導的肝纖維化及肝損傷有價值。當沒有明顯肝纖維化時,肝T1rho輕微受水腫及急性炎症的影響。 / 為將肝臟T1rho磁共振成像轉化到臨床使用,我們研究了其可行性,以及正常志願者肝臟T1rho值分佈範圍。發現採用六個自旋鎖定時間來測量健康志願者肝T1rho,結果有較高的可重複性和一致性,肝T1rho平均值為42.5ms,分佈範圍為38.8到46.5ms。採用三個自鎖鎖定時間點掃描,可以減少一半掃描時間,且可以得到可信的肝T1rho值,但採用兩個自旋鎖定時間點則不行。 / T1rho relaxation is spin-lattice relaxation in the rotating frame. It determines the decay of the transverse magnetization in the presence of a spin-lock radiofrequency pulse, which applied along the transverse magnetization. T1rho MRI is sensitive to low frequency motional processes, so it can be used to investigate the interaction between water molecules and their macromolecular environment. T1rho imaging is suggested to have the potential to identify early biochemical changes in tissues. / Aging and chronic hypertension are two major risk factors for common neurodegenerative disease. However, whether normal brain aging and chronic spontaneous hypertensive are associated with brain T1rho values changes were not reported. We longitudinally measured the T1rho value in rat brain of Sprague-Dawley (SD) rats from 5-month to 15-month, and spontaneous hypertensive rats (SHR) with Wistar Kyoto (WKY) rats from 6-month to 12-month. The T1rho values in three brain regions of thalamus, hippocampus, and cortices increased with aging process, and were significantly higher in SHR than WKY rats. / For intervertebral disc, the correlation between T1rho and degenerative grade has been reported. However, whether and how T1rho specifically offer better evaluation of disc degeneration compared with T2 was not studied previously. T1rho and T2 value of nucleus pulposus (NP) and annulus fibrosus (AF) was compared with reference to the five-level and eight-level semi-quantitative disc degeneration grading systems. For NP, T1rho and T2 decreased quadratically with disc degeneration grades and had no significant trend difference (P=0.40). In NP, T1rho and T2 decrease in a similar pattern following disc degeneration. For AF, T1rho and T2 decreased linearly and the slopes of T2 were significantly flatter than those of T1rho (P<0.001). Therefore, the T1rho is better suited for evaluating AF in degenerated disc than T2. / Liver fibrosis, a common feature of almost all causes of chronic liver disease, involves macromolecules accumulated within the extracellular matrix. Male Sprague-Dawley rats received intraperitoneal injection of 2 ml/kg CCl4 twice weekly for up to 6 weeks. Then CCl4 was withdrawn for recovery. The liver T1rho values increased slightly on day 2, then increased further and were highest at week 6 post CCl4 insults, and decreased upon the withdrawal of the CCl4 insult. This study demonstrated that T1rho MRI is a valuable imaging biomarker for liver injury and fibrosis induced by CCl4. Liver T1rho value was only mildly affected by edema and acute inflammation when there was no apparent fibrosis. / To translate liver T1rho MRI to clinical application, the technical feasibility of T1rho MRI in human liver was explored and the normal range of T1rho values in healthy volunteers was determined. We found it is feasible to obtain consistent liver T1rho measurement for healthy human liver with six spin-lock time (SLT) points of 1, 10, 20, 30, 40, and 50ms; the mean liver T1rho value of the healthy subjects was 42.5ms, with a range of 38.8-46.5ms. Adopting 3-SLT points of 1, 20, and 50ms for T1rho measurement could provide reliable measurement and reduce the scanning time, while 2-SLT points of 1 and 50ms do not provide reliable measurement. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Zhao, Feng. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2013. / Includes bibliographical references (leaves 119-143). / Abstracts also in Chinese. / ABSTRACT --- p.i / ACKNOWLEDGEMENTS --- p.vi / LIST OF FIGURES --- p.viii / LIST OF TABLES --- p.xvi / LIST OF ABBREVIATIONS --- p.xvii / CONTENTS --- p.xxi / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Conventional Magnetic Resonance Imaging --- p.1 / Chapter 1.1.1 --- Basic Principle of Conventional Magnetic Resonance Imaging --- p.1 / Chapter 1.1.2 --- T1 Relaxation --- p.2 / Chapter 1.1.3 --- T2 Relaxation --- p.3 / Chapter 1.2 --- T1rho Magnetic Resonance Imaging --- p.3 / Chapter 1.2.1 --- T1rho Relaxation --- p.3 / Chapter 1.2.2 --- Principle of T1rho Magnetic Resonance Imaging --- p.4 / Chapter 1.2.3 --- Radiofrequency Pulse for T1rho Magnetic Resonance Imaging --- p.5 / Chapter 1.2.4 --- T1rho-weighted Contrast Imaging and Application --- p.10 / Chapter 1.2.5 --- Quantitative T1rho Mapping and Application --- p.11 / Chapter 1.2.6 --- T1rho Dispersion and Application --- p.13 / Chapter 1.3 --- Thesis Overview --- p.14 / Chapter Chapter 2 --- T1rho MRI in brain aging of animal model --- p.19 / Chapter 2.1 --- Introduction --- p.19 / Chapter 2.2 --- Materials and Methods --- p.20 / Chapter 2.2.1 --- Animal Model of Brain Aging --- p.20 / Chapter 2.2.2 --- T1rho Data Acquisition --- p.21 / Chapter 2.2.3 --- T1rho Data Processing --- p.23 / Chapter 2.2.4 --- T1rho Measurement and Statistical Analysis --- p.24 / Chapter 2.3 --- Results --- p.27 / Chapter 2.4 --- Discussion --- p.38 / Chapter 2.5 --- Summary --- p.42 / Chapter Chapter 3 --- T1rho MRI in lumbar disc degeneration of human subjects --- p.43 / Chapter 3.1 --- Introduction --- p.43 / Chapter 3.2 --- Methods --- p.45 / Chapter 3.2.1 --- Subjects --- p.45 / Chapter 3.2.2 --- MR Image Acquisition --- p.46 / Chapter 3.2.2.1 --- T2-weighted MRI --- p.46 / Chapter 3.2.2.2 --- T2 Mapping Imaging --- p.47 / Chapter 3.2.2.3 --- T1rho MRI --- p.47 / Chapter 3.2.3 --- Data Processing --- p.49 / Chapter 3.2.4 --- Data Measurement and Statistical Analysis --- p.49 / Chapter 3.3 --- Results --- p.52 / Chapter 3.3.1 --- Range of T1rho/T2 Values for Discs --- p.52 / Chapter 3.3.2 --- The Relationship between NP T1rho/T2 Values and 8-level Degeneration Grading of Discs --- p.52 / Chapter 3.3.3 --- The Relationship between NP T1rho/T2 Values and 5-level Degeneration Grading of Discs --- p.55 / Chapter 3.3.4 --- The Relationship between AF T1rho/T2 Values and 8-level Degeneration Grading of Discs --- p.58 / Chapter 3.3.5 --- The Relationship between AF T1rho/T2 Values and 8-level Degeneration Grading of Discs --- p.61 / Chapter 3.4 --- Discussion --- p.64 / Chapter 3.5 --- Summary --- p.69 / Chapter Chapter 4 --- T1rho MRI in rat liver fibrosis model induced by CCl4 insult --- p.71 / Chapter 4.1 --- Introduction --- p.71 / Chapter 4.2 --- Materials and Methods --- p.73 / Chapter 4.2.1 --- Animal Preparation --- p.73 / Chapter 4.2.2 --- MR Image Acquisition --- p.74 / Chapter 4.2.2.1 --- T2-weighted MRI --- p.75 / Chapter 4.2.2.2 --- T1rho MRI --- p.75 / Chapter 4.2.3 --- Data Processing --- p.76 / Chapter 4.2.4 --- Data Measurement and Statistical Analysis --- p.78 / Chapter 4.2.5 --- Histology Analysis --- p.79 / Chapter 4.3 --- Results --- p.80 / Chapter 4.3.1 --- T1rho Measurement Reproducibility --- p.80 / Chapter 4.3.2 --- Rat Liver T1rho Values at Different Time Phase --- p.81 / Chapter 4.3.3 --- Relative Rat Liver Signal Intensity on T2WI at Different Time Phase --- p.83 / Chapter 4.3.4 --- Histology Results --- p.84 / Chapter 4.4 --- Discussion --- p.86 / Chapter 4.5 --- Summary --- p.91 / Chapter Chapter 5 --- T1rho MRI in liver of healthy human subjects --- p.93 / Chapter 5.1 --- Introduction --- p.93 / Chapter 5.2 --- Methods --- p.95 / Chapter 5.2.1 --- Subjects --- p.95 / Chapter 5.2.2 --- MR Image Acquisition --- p.96 / Chapter 5.2.2.1 --- T2-weighted MRI --- p.96 / Chapter 5.2.2.2 --- T1rho MRI --- p.97 / Chapter 5.2.3 --- T1rho Data Processing --- p.99 / Chapter 5.2.4 --- T1rho Measurement --- p.100 / Chapter 5.3 --- Results --- p.102 / Chapter 5.3.1 --- T1rho Measurement Reproducibility --- p.105 / Chapter 5.3.2 --- T1rho Value Agreement of the Fasting Status with Post Meal Status --- p.105 / Chapter 5.3.3 --- T1rho Value Agreement for T1rho Maps Constructed by Different Spin-lock Time Points --- p.106 / Chapter 5.3.4 --- T1rho Value Range of Healthy Human Subjects --- p.108 / Chapter 5.4 --- Discussion --- p.108 / Chapter 5.5 --- Summary --- p.113 / Chapter Chapter 6 --- General discussion and further work --- p.115 / References: --- p.119 / LIST OF PUBLICATIONS --- p.138
354

Acute-Onset Heart Failure Secondary to Biventricular Non-Compaction Cardiomyopathy and Atrial Septal Defect in a Woman Presenting in the Seventh Decade

Sharma, Purva, Jobanputra, Yash, Chait, Robert, Ghumman, Waqas 28 February 2022 (has links)
We present a case of a previously asymptomatic 63-year-old woman who presented with worsening dyspnoea for 3 weeks. Initial transthoracic and later transoesophageal echocardiography confirmed biventricular non-compaction cardiomyopathy and a large secundum atrial septal defect (ASD) measuring 1.4 cm. Additionally, there was a haemodynamically significant left to right shunt causing acute decompensated systolic heart failure. She eventually underwent closure of the septal defect using a AMPLATZER Septal Occluder device. Decision to close the defect was made as the left to right shunt was causing severe pulmonary hypertension and acute heart failure. Since most heart failure treatments involve lowering of the LV afterload there was consideration that this could cause right to left shunting and could cause an Eisenmenger physiology. Hence the AMPLATZER Septal Occluder device was placed to eliminate the shunt through the ASD. The ASD combined with the non-compaction posed significant treatment challenge in this case.
355

Ultrasound-Guided Percutaneous Thrombin Injection for Femoral Artery Pseudoaneurysms

McCoy, Dana W., Scharfstein, B, Walker, W., Evans, J. 01 October 2000 (has links)
We reviewed 13 cases of ultrasound-guided thrombin injection of femoral pseudoaneurysms. All cases occurred within a 17-month period from January 1998 through May 1999 and were complications of femoral artery puncture. Immediate total thrombosis occurred in nine of 13 patients. Twenty-four-hour follow-up ultrasound in seven patients revealed no recurrence of pseudoaneurysm. Two of 13 patients required operative repair. One pseudoaneurysm thrombosed with 15 minutes of compression after injection and one case required a second injection. No cases of arterial thrombosis were noted. Ultrasound-guided thrombin injection for femoral artery pseudoaneurysm represents a safe and effective alternative to operative repair.
356

A determination of normal reference ranges for bone mineral density for Indian women of varying age groups in KZN : the impact of local data on the diagnosis of osteoporosis

Sunder, Roshnee January 2006 (has links)
Thesis (M.Tech.: Radiography) - Dept. of Radiography, Durban University of Technology, 2006 xxiv, 214 leaves, Annexures A-L / The aim of this research was to determine normal bone mineral density (BMD) reference ranges (means and standard deviations) for the lumbar spine, total hip and distal forearm, for Indian women of varying age groups in KwaZulu-Natal. The aim also included a comparison of the study population reference ranges with those provided by the manufacturer in order to evaluate any diagnostic implications.
357

Occupational stressors in diagnostic radiographers working in public health facilities in the eThekwini district of Kwazulu-Natal

Gam, Nkululeko Phalson 06 1900 (has links)
Submitted in fulfillment of the requirements for the Master of Technology: Radiography degree, Durban University of Technology, Durban, South Africa, 2015. / Introduction Occupational stress has negative effects on both the organisation and individuals employed by the organisation. In the organisation it can result in high levels of absenteeism, reduced productivity and compromised levels of patient care. Furthermore individuals affected by stress may suffer from raised levels of tension, mental fatigue, insufficient sleep, anxiety, and anger. Interventions to prevent both organisational and individual effects of occupational stress may only be implemented once stressors in an occupa-tional group have been identified hence the need for the current study. Purpose The purpose of the study was to investigate occupational stress in diagnostic radiographers working in public healthcare institutions in the eThekwini District of KwaZulu-Natal using a quantitative research approach. Method A cross sectional survey using a validated questionnaire with some open and closed-ended questions was utilised. Radiographers working in public hospitals in the eThekwini District of KwaZulu-Natal were invited to parti-cipate in the study. Respondents were asked to answer 60 closed ended and four open ended questions. Open ended questions afforded the respondents an opportunity to express their opinions. Quantitative data was analysed using the Statistical Package for Social Sciences (SPSS) version 21.0. Inferential statistics included the use of reliability coefficients, correlations and chi square test at a 95% confidence level. Open ended questions were analysed using thematic analysis. Results One hundred and one questionnaires were administered and forty three were returned which resulted in a 43% response rate. The mean age of respondents was 31.7 years and 88.4% were females. The majority (67.4%) were in possession of a National Diploma in Radiography. Seventy two percent worked in regional hospitals. The majority (41.8%) were employed as chief radiographers. Most radiographers affected by stressors were those working in regional hospitals. The three main sources of stress in order of response were workload, faulty equipment and staff shortages. In addition, bullying, long and strenuous shifts as well as training of students were also found to be stressors. Physical exercises, counselling and wellness days were used to reduce stress whilst employment of more staff, attending to faulty equipment, team building, reducing workload, and improved working conditions were suggested as methods of reducing stress amongst radiographers. Conclusion Radiographers working in the eThekwini District were stressed by a number of factors in their work places. Radiographers suggested ways that can be employed to reduce stress in their departments. A close cooperation between radiographers; radiography supervisors; institutional, district and provincial managers is recommended in order to address the challenges faced by radiographers.
358

Development of a freehand three-dimensional radial endoscopic ultrasonography system

Inglis, Scott January 2009 (has links)
Oesophageal cancer is an aggressive malignancy with an overall five-year survival of 5-10% and two-thirds of patients have irresectable disease at diagnosis. Accurate staging of oesophageal cancer is important as survival closely correlates with the stage of the tumour, nodal involvement and presence of metastases (TNM staging). Endoscopic ultrasonography (EUS) is currently the most reliable modality for providing accurate T and N staging. Depending on findings of the staging, various treatment options including endoscopic, oncological, and surgical treatments may be performed. It was theorised that the development of three-dimensional radial endoscopic ultrasonography would reduce the operator dependence of EUS and provide accurate dimensional and volume measurements to aid planning and monitoring of treatment. This thesis investigates the development of a three dimensional endoscopic ultrasound technique that can be used with the radial echoendoscopes. Various agar-based tissue mimicking material (TMM) recipes were characterised using a scanning acoustic macroscope to obtain the acoustic properties of attenuation, backscatter and speed of sound. Using these results, a number of endoscopic ultrasound phantoms were developed for the in-vitro investigation and evaluation of 3D-EUS techniques. To increase my understanding of EUS equipment, the imaging and acoustic properties of the EUS endoscopes were characterised using a pipe phantom and a hydrophone. The dual ‘single element’ mechanical and ‘multi-element’ electronic echoendoscopes were investigated. Measured imaging properties included dead space, low contrast penetration, and pipe length. The measured acoustic properties included transmitted beam plots, active working frequency and peak pressures. Three-dimensional ultrasound techniques were developed for specific application to EUS. This included the study of positional monitoring systems, reconstruction algorithms and measurement techniques. A 3D-EUS system was developed using a Microscribe positional arm and frame grabber card, to acquire the 3D dataset. A Matlab 3D-EUS toolbox was written to reconstruct and analyse the volumes. The 3D-EUS systems were evaluated on the EUS phantom and in clinical cases. The usefulness of the 3D-EUS systems was evaluated in a cohort of patients, who were routinely investigated by conventional EUS for a variety of upper gastrointestinal pathology. 3D-EUS accurately staged early tumours and provided the necessary anatomical information to facilitate treatment. With regards to more advanced tumours, 3D-EUS was more accurate than EUS in T and N staging. 3D-EUS gave useful anatomical details in a variety of benign conditions such as varicies and GISTs.
359

A determination of normal reference ranges for bone mineral density for Indian women of varying age groups in KZN : the impact of local data on the diagnosis of osteoporosis

Sunder, Roshnee January 2006 (has links)
A dissertation submitted in full compliance with the requirements for the M.Tech: Radiography,Durban University of Technology, 2006. / The aim of this research was to determine normal bone mineral density (BMD) reference ranges (means and standard deviations) for the lumbar spine, total hip and distal forearm, for Indian women of varying age groups in KwaZulu-Natal. The aim also included a comparison of the study population reference ranges with those provided by the manufacturer in order to evaluate any diagnostic implications. / M
360

Occupational stressors in diagnostic radiographers working in public health facilities in the eThekwini district of KwaZulu-Natal

Gam, Nkululeko Phalson 06 1900 (has links)
Submitted in fulfillment of the requirements for the Master of Technology: Radiography degree, Durban University of Technology, Durban, South Africa, 2015. / Introduction Occupational stress has negative effects on both the organisation and individuals employed by the organisation. In the organisation it can result in high levels of absenteeism, reduced productivity and compromised levels of patient care. Furthermore individuals affected by stress may suffer from raised levels of tension, mental fatigue, insufficient sleep, anxiety, and anger. Interventions to prevent both organisational and individual effects of occupational stress may only be implemented once stressors in an occupa-tional group have been identified hence the need for the current study. Purpose The purpose of the study was to investigate occupational stress in diagnostic radiographers working in public healthcare institutions in the eThekwini District of KwaZulu-Natal using a quantitative research approach. Method A cross sectional survey using a validated questionnaire with some open and closed-ended questions was utilised. Radiographers working in public hospitals in the eThekwini District of KwaZulu-Natal were invited to parti-cipate in the study. Respondents were asked to answer 60 closed ended and four open ended questions. Open ended questions afforded the respondents an opportunity to express their opinions. Quantitative data was analysed using the Statistical Package for Social Sciences (SPSS) version 21.0. Inferential statistics included the use of reliability coefficients, correlations and chi square test at a 95% confidence level. Open ended questions were analysed using thematic analysis. Results One hundred and one questionnaires were administered and forty three were returned which resulted in a 43% response rate. The mean age of respondents was 31.7 years and 88.4% were females. The majority (67.4%) were in possession of a National Diploma in Radiography. Seventy two percent worked in regional hospitals. The majority (41.8%) were employed as chief radiographers. Most radiographers affected by stressors were those working in regional hospitals. The three main sources of stress in order of response were workload, faulty equipment and staff shortages. In addition, bullying, long and strenuous shifts as well as training of students were also found to be stressors. Physical exercises, counselling and wellness days were used to reduce stress whilst employment of more staff, attending to faulty equipment, team building, reducing workload, and improved working conditions were suggested as methods of reducing stress amongst radiographers. Conclusion Radiographers working in the eThekwini District were stressed by a number of factors in their work places. Radiographers suggested ways that can be employed to reduce stress in their departments. A close cooperation between radiographers; radiography supervisors; institutional, district and provincial managers is recommended in order to address the challenges faced by radiographers. / M

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