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.
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Showing 1 to 18 of 18 for “"Power Doppler"”.
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Coherent flow power Doppler imaging
… perfusion. Conventional techniques include color Doppler imaging and power Doppler (PD) imaging. These methods depend on either the measurement of phase change or the detection of the power of backscattered echoes from blood. Both techniques are susceptible to noise. Common noise sources include …
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Power doppler ultrasound for peripheral perfusion imaging
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Power-Doppler-sonographische Darstellung der Synovialitis, Validierung der Methode anhand histologischer Untersuchungen
… klinischen Studie wird untersucht, inwieweit die powerdoppler-sonographischen Befunde der Synovialitis bei Arthrose bzw. rheumatoider Arthritis mit den histologischen Befunden korrelieren Es wurden 23 Patienten, 6 Männer und 17 Frauen, mit einem Durchschnittsalter von 69 Jahren vor geplanter …
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Perfusion imaging using power doppler ultrasound without contrast enhancement to diagnose peripheral artery disease
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Perfusion imaging using power doppler ultrasound without contrast enhancement to diagnose peripheral artery disease
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Clinical utility of 3D power doppler ultrasound and maternal biomarkers in the prediction of pre-eclampsia in high-risk pregnancies
… vascularisation indices, uterine artery Doppler and maternal serum biomarkers (Pregnancy Associated Plasma Protein-A (PAPP-A), Placental like Growth Factor (PlGF), soluble Fms-like tyrosine kinase (sFLt-1) and soluble Endoglin (sEng)) measured in the first and second trimesters of …
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Studio del microcircolo della parete gastrica affetta da patologia infiammatoria e neoplastica mediante Color-Power Doppler ed ecografia con mezzo di contrasto endovenoso
Introduzione: Negli ultimi anni, il color-power Doppler si è dimostrato un utile strumento per valutare le alterazioni della vascolarizzazione della parete intestinale nelle patologie del tratto gastro-enterico. Più di recente, i mezzi di contrasto ecografici di II generazione associati …
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Análisis de la circulación cerebral fetal mediante power doppler tridimensional en gestaciones complicadas con diabetes gestacional y su relación con el estado proinflamatorio materno
… utilizando índices vasculares de la ecografía power Doppler tridimensional (3DPD) y estudiar sus relaciones con los perfiles lipídicos y glucémicos maternos, así como su relación con marcadores inflamatorios y de daño endotelial. Métodos: Se realiza un estudio de tipo casos y controles en …
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Utilizing Multitask Transfer Learning for Sonographic Rheumatoid Arthritis Synovitis Grading
… (US) images in Brightness mode (B-Mode) and Power Doppler mode.</p> <p>In the medical community, the lack of reliability of scoring these images has been an issue and reason for concern for doctors and other medical practitioners. The human/machine variability across the acquisition procedure …
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The use of ultrasound in the prediction of endometrial cancer in women with postmenopausal bleeding
… characteristics curve, AUC, 0.83), and the power Doppler ultrasound variable that best predicted malignancy was irregular branching of endometrial blood vessels (AUC 0.77). Mathematical models for evaluation of the individual risk of endometrial malignancy were constructed using clinical …
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Multimodal imaging monitoring of key physiological changes of peripheral arterial disease
… with Laser Speckle Contrast Imaging (LSCI) and Power Doppler ultrasound for perfusion (superficial and deep tissue, respectively); followed by fluorescent imaging of hypoxia and imaging both angiogenesis and metabolism using molecular PET probes. Briefly, we found that building such a multimodal …
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Mapping Ultrasound Features of Hand Osteoarthritis: Links to Classifications, Clinical Signs, and Self-Reported Outcomes
… hypertrophy (SH), synovial effusion (SE), power Doppler (PD), and SMI vascularity. Clinical signs were assessed physically (finger nodes, tenderness, thumb-base squaring) and photographically (finger nodes, deformity, thumb-base squaring). Pain and aesthetic impact were measured using …
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AVALIAÇÃO ANDROLÓGICA E ULTRASSONOGRAFIA DOPPLER EM GARANHÕES QUARTO DE MILHA
… in their function. Thus, the diagnosis through Doppler ultrasonography can show reproductive problems. The aim of this study was to evaluate the correlation between testicular hemodynamics and sperm quality, emphasizing sperm motility. Six stallions of a quarter of a mile, healthy, were used in …
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A multimodal lens into vascular recovery in a preclinical model of peripheral arterial disease
… at hypoxia and \avbt activity, as well as a new power Doppler ultrasound imaging technique capable of detecting small spatiotemporal changes in blood perfusion within muscle. The second chapters applies the \cuProbe peptide targeted at \avbt, to establish an optimal preclinical model of PAD. The …
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First-order statistical speckle models improve robustness and reproducibility of contrast-enhanced ultrasound perfusion estimates
… which combine vascular measures from CEUS and power Doppler, may be suitable for screening of de novo sunitinib resistance in patients diagnosed with renal cell carcinoma. Further studies are required to assess whether this protocol can be predictive of patient outcome.
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Quantitative Texture and Blob Analyses on Patellar Tendon Sonographic Images of Collegiate Basketball Athletes
… ML6-15 linear probe. At each imaging session, power Doppler images were collected in the longitudinal and transverse axis, at the proximal, central, and distal regions of the patellar tendon of both knees. Image texture analysis was performed using a custom MATLAB (Mathworks, USA) program to …
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Peripheral perfusion imaging modeling
… ultrasonic per- fusion imaging. Novel pulsed-Doppler methods for perfusion imaging are val- idated using dialysis cartridges as perfusion phantoms. Techniques are exam- ined quantitatively at 5 and 12.5 MHz using phantoms with blood-mimicking fluid flow within cellulose microfibers. A variety …
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Ultrasound tissue perfusion imaging
… and potential malignancy. Ultrasonic pulsed Doppler imaging is a safe and economical modality for noninvasive monitoring of blood flow. However, weak blood echoes make it difficult to detect perfusion using standard methods without the expense of contrast enhancement. Additionally, imaging …