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M.Tech. (Chiropractic) / Lateral elbow tendinopathy is the most frequent periarticular lesion which affects 1% to 3% of the general population and is a difficult condition to manage with a wide range of procedures and management protocols advocated (Abrahamson and Comfort, 2010). This study aimed to assess the efficacy of managing lateral elbow tendinopathy using therapeutic ultrasound (U/S), interferential current (IFC) or alternatively a combination of IFC and therapeutic U/S in addition to chiropractic manipulative therapy of the cervical spine and elbow. This study was a comparative study consisting of three groups of ten participants each with an equal gender ratio. Prior to becoming a participant in this study individuals were assessed according to the inclusion and exclusion criteria. Group A received therapeutic U/S; Group B received IFC and Group C received combination therapy of IFC and therapeutic U/S. All three groups received chiropractic manipulative therapy to the cervical spine and joints of the elbow complex. Subjective data was obtained using the Numerical Pain Rating Scale (NPRS). Objective data was obtained using the pressure algometer (pain pressure threshold) and the Jamar grip strength dynamometer (pain-free grip strength) on the affected side. The study was conducted over a course of three weeks for a total of seven visits per participant. Subjective and objective data was collected pre-intervention on the first and fourth visits and on the seventh evaluation only visit. Analysis of the data collected was performed by a statistician. All three groups showed statistically significant clinical improvements in all measures. The only group not exhibiting a statistical significance was the therapeutic U/S group in the initial pain pressure threshold results. In the objective measures of all intervals none of the groups showed statistical superiority over one another. However, the final NPRS results showed statistically significant improvement in therapeutic U/S and combination therapy groups over IFC alone. From the results it can be concluded that all groups were effective for lateral elbow tendinopathy in conjunction with chiropractic manipulative therapy. With respects to subjective pain therapeutic U/S and combination therapy appeared to have a greater efficacy than IFC, but no superior modality was identified with respects to objective measures.

Thesis (M.S.) -- Worcester Polytechnic Institute. / Keywords: ultrasound modeling; annular arrays. Includes bibliographical references (p.197-198).

In the design of cryogenic fuel tanks for the next generation Reusable Launch Vehicles (RLVs), the permeability of liquid hydrogen (LH2) across the thickness of the tank is a critical issue. The rate of permeation of LH2 is largely dependent on the internal damage state of the composite tank wall. Damage in the form of matrix cracks in the composite material of the tank is responsible for the through-the-thickness permeation of LH2. In this context, the detection of matrix cracks takes on an unprecedented significance. In this work, an ultrasonic technique for the ply-by-ply detection of matrix cracks in laminated composites is developed. Experimental results are presented for graphite/epoxy laminates with different lay-ups and laminate thicknesses. Matrix cracks in each of the plies of the laminated composites were detected even when there was a rather high density of cracks in all of the plies. The ultrasonic data were calibrated by comparing them with the corresponding results obtained by using the traditional methods of optical microscopy and penetrant enhanced X-radiography. Excellent quantitative correlation was observed between the results obtained with ultrasonics and the traditional methods.

In the design of cryogenic fuel tanks for the next generation Reusable Launch Vehicles (RLVs), the permeability of liquid hydrogen (LH2) across the thickness of the tank is a critical issue. The rate of permeation of LH2 is largely dependent on the internal damage state of the composite tank wall. Damage in the form of matrix cracks in the composite material of the tank is responsible for the through-the-thickness permeation of LH2. In this context, the detection of matrix cracks takes on an unprecedented significance. In this work, an ultrasonic technique for the ply-by-ply detection of matrix cracks in laminated composites is developed. Experimental results are presented for graphite/epoxy laminates with different lay-ups and laminate thicknesses. Matrix cracks in each of the plies of the laminated composites were detected even when there was a rather high density of cracks in all of the plies. The ultrasonic data were calibrated by comparing them with the corresponding results obtained by using the traditional methods of optical microscopy and penetrant enhanced X-radiography. Excellent quantitative correlation was observed between the results obtained with ultrasonics and the traditional methods.

Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (leaves 108-116).

Three-dimensional (3D) sonography is regarded as a further development of ultrasound imaging technology and its application has greatly increased in recent years. This thesis summarizes the original research findings of the application of 3D ultrasonography for biometry measurement, morphology screening, prenatal diagnosis of abnormalities, ultrasound training and the application of 3D volumetry in the early diagnosis of homozygous α-thalassemia and birth weight prediction in term pregnancy. In a study involving 50 singleton pregnancies at 17-34 weeks' gestation, fetal biometric measurements obtained by an inexperienced operator using both two-dimensional (2D) and 3D ultrasound were reproducible and showed good agreement with those obtained by an experienced operator (all intraclass correlation coefficients were ≥ 0.991). The use of 3D ultrasound by an inexperienced operator allowed faster measurement of fetal biometric parameters than the use of 2D ultrasound, and also seemed to facilitate the acquisition of higher-quality images for the measurement of abdominal circumference. In basic central nervous system and cardiac screening examination, for the inexperienced operator, 3D/four-dimensional(4D) volume acquisition yielded a quicker but less optimal anatomic examination of the fetal central nervous system and heart structures compared to 2D. The diagnostic accuracy of 3D ultrasonography in central nervous system abnormalities was also investigated. The results illustrated that 3D agreed with 2D ultrasonography in the prenatal diagnosis of intracranial malformations. Homozygous α0-thalassemia is very common in South-east Asia and its prenatal diagnosis is essential due to increased fetal and maternal mortality and morbidity. Placental volume/CRL quotient measured by 3D volumetry was significantly higher in pregnancies with α0-thalassemia major cases, and 1.49 may be regarded as a cut-off for early prediction of α0-thalassemia major. In a cross-sectional study of 290 Hong Kong Chinese women with a singleton pregnancy at 37-42 weeks of gestation, the birth weight prediction models based on 3D thigh volume and conventional 2D biometric measurements were developed. It was found that with 3D thigh model, the precision of birth weight prediction to within 5 and 10% of actual birth weight in a Chinese population at term gestation could be achieved. Previous studies have shown that there is a difference in the learning curve of fetal biometry measurement by 2D ultrasound among trainees. Whether there is any difference in the learning curve between 2D and 3D ultrasound is unknown. The study included three trainees and each of them performed 90 scans in biometry measurements. By using cumulative sum analysis graphs, it could be shown that there was no difference in the learning curve between 2D and 3D ultrasound. In conclusion, the above studies have demonstrated that the use of 3D ultrasound has diversified and provided much additional information in selected indications. / published_or_final_version / Obstetrics and Gynaecology / Doctoral / Doctor of Philosophy

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