Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 20 for “"3D Ultrasound"”.
-
Design of a single element 3D ultrasound scanner
… previously theorized scanning methods such as ultrasound tomography can now be realized. This thesis presents the design, error analysis, and initial image reconstructions from a single element 3D ultrasound tomography system. The system enables volumetric pulse echo or transmission imaging of …
-
3D Ultrasound in Pregnancy: Discourses, Women’s Experiences and Psychological Understanding
… private three- and four-dimensional (3/4D) ultrasound scans in pregnancy, the experiences of women who have 3/4D scans and what impact these scans may have on pregnant women. A critical discourse analysis of scanning company websites was undertaken to explore the discourses, identities and …
-
A Novel System and Image Processing for Improving 3D Ultrasound-guided Interventional Cancer Procedures
… Image-guided interventions that incorporate 3D information intraoperatively have been shown to improve the accuracy and feasibility of these procedures, but clinical needs still exist for improving workflow and reducing physician variability with widely applicable cost-conscience approaches. …
-
Three-dimensional free-hand ultrasound imaging system for medical applications
This thesis has developed a PC-based 3D free-hand ultrasound system using conventional ultrasound scanner. The 3D ultrasound system developed is used for carotid and brachial artery scanning to evaluate vessel wall characteristics, which have strong relationship to traditional atherosclerotic risk …
-
The design, construction and testing of a hermetically sealed breast platfrom for dual-modality mammography
When ultrasound is used as an adjunct to X-ray mammography in either hand-held or automated mode, the patient typically lies in a prone position. The disadvantages of this approach include: variable image quality; poor co-registration of X-ray and ultrasound images; and increased costs and patient …
-
Path Planning for Trajectory Guided Freehand Ultrasound Scan
… crucial role in medical diagnosis and analysis. 3D medical imaging provides more comprehensive and greater anatomical detail of internal body structures when compared to traditional 2D images, allowing for more accurate measurement of organ and tumor volume, and prediction and monitoring of some …
-
Image processing in echography and MRI
… imaging applications: speckle<br/>detection in 3D ultrasound, left ventricle detection in cardiac magnetic resonance imaging<br/>(MRI) and flow feature visualisation in velocity MRI.<br/><br/>For speckle detection, a learning from data approach was taken using pattern recognition<br/>principles …
-
Ultrasound prediction of large fetuses. Epidemiological and clinical investigations
… by using a routine fetal two-dimensional (2D) ultrasound examination for fetal growth in the third trimester of pregnancy, and to examine whether the detection rate could be further improved by including maternal pre-pregnancy and pregnancy-related variables to the estimated fetal weight (FW) …
-
3D organ property mapping using freehand ultrasound scans
3D organ property mapping has gained a considerable amount of interest in the recent years because of its diagnostic and clinical significance. Existing methods for 3D property mapping include computed tomography (CT), magnetic resonance imaging (MRI), and 3D ultrasound (3DUS). These methods, while …
-
The use of ultrasound in the prediction of endometrial cancer in women with postmenopausal bleeding
… presented in this thesis was to identify the ultrasound methods and ultrasound features that are most useful for the prediction of endometrial cancer in patients with postmenopausal bleeding and sonographic endometrial thickness 4.5 mm or more. The grey-scale ultrasound variable that best …
-
Predicting successful outcome of singleton and multiple pregnancies after assisted reproductive technologies (ART)
… women at the outset of their IVF cycle. A 3D ultrasound of the uterine volume was performed. Women completed a survey on lifestyle and demographics. None of the interrogated demographics or lifestyle factors demonstrated a significant impact on conception nor on pregnancy loss. Neither …
-
Development and Validation of Mechatronic Systems for Image-Guided Needle Interventions and Point-of-Care Breast Cancer Screening with Ultrasound (2D and 3D) and Positron Emission Mammography
… needle interventions. Specifically, 2D and 3D ultrasound (US) and positron emission mammography (PEM) were employed to improve detection, independent of breast density, in conjunction with mechatronic and automated approaches for accurate image acquisition and precise interventional …
-
The Role of Three-dimensional Ultrasound in the Diagnosis and Treatment of Uterine Pathology
… the role of three – dimensional transvaginal ultrasound in the identification, classification and management of uterine pathology. We performed serial measurements of fibroids over a period of time to examine their natural history. We found that fibroids tend to grow at a relatively fast …
-
Microultrasound Imaging of Tissue Dysplasia
… of high frequency, broadband µUS (micro-ultrasound) imaging transducers through optimization of ultra-thinning processes for lithium niobate (LNO) and fabrication of novel ‘mass-spring’ matching layers using carefully controlled vacuum deposition is demonstrated. The effectiveness of this …
-
Comprehensive gene assessment of estrogen receptor positive breast cancers reveals that HER2 positive status plays an important role in resistance to neoadjuvant letrozole
… their clinical response assessed using periodic 3D ultrasound. Core biopsies were taken at 0, 14 days and 3 months of treatment. RNA was extracted, amplified, labelled and hybridised to Illumina HT-12 whole genome beadarrays. A group of patients with ER positive/ HER2 negative disease were …
-
Innovations in three-dimensional ultrafast ultrasound imaging
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
-
Advancing Photoacoustic Imaging Technology with Compact Source, Fluorescence Co-registration, Spectral Encoding, Matrix Detection and FRET
… biomedical imaging modality that can provide 3D ultrasonically scalable images of biological tissue ranging from organelles to organs. Pure optical imaging modalities (e.g., optical coherence tomography and diffuse optical tomography) encounter a fundamental limitation of either penetration or …
-
Innovations in imaging sequences and reconstruction pipelines for ultrasound localization microscopy
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
-
A clinical role for fluid dynamics modelling of arteriovenous fistulae
… modelling. This began with the development of an ultrasound-based 3D geometry scanning methodology, as well as a data pipeline for generation of PS-CFD models. A diverse range of patients with AVFs were scanned during a one year period, from which eight different patient cases were formed, …