Search results for "Ultra"
showing 10 items of 4451 documents
Zur Ultrastruktur der Bindegewebszellen beim Myxoedema circumscriptum praetibiale
1967
Das Fehlen von jedweden Gefasveranderungen in einem klinisch sonst typischen myxodematosen Substrat ist Anlas, als weitere Moglichkeit in der Genese mucoider Infiltrationsvorgange grundsatzlich — neben der fruher betonten pathogenetischen Dignitat von Gefassonderformationen (Sperrarterien) oder pathologischen Umwandlungen (endarteriitische Prozesse) — auch auf die offensichtliche Bedeutung direkter bindegewebszelliger Sekretion chromotropen Materials an Hand elektronenmikroskopischer Beobachtung hinzuweisen. Gefunden wurden bei dieser Untersuchung 2 Bindegewebszelltypen, von denen der eine, der die bekannte sternformige Form aufweist, als “Mucoblast” angesehen wird, wahrend der andere Zellt…
Global Chronic Total Occlusion Crossing Algorithm
2021
© 2021 The Authors. Published by Elsevier on behalf of the American College of Cardiology Foundation. This is an open access article under the CC By-NC-ND License (http://creativecommons.org/licenses/by-nc-nd/4)
SIFT Texture Description for Understanding Breast Ultrasound Images
2014
Texture is a powerful cue for describing structures that show a high degree of similarity in their image intensity patterns. This paper describes the use of Self-Invariant Feature Transform (SIFT), both as low-level and high-level descriptors, applied to differentiate the tissues present in breast US images. For the low-level texture descriptors case, SIFT descriptors are extracted from a regular grid. The high-level texture descriptor is build as a Bag-of-Features (BoF) of SIFT descriptors. Experimental results are provided showing the validity of the proposed approach for describing the tissues in breast US images.
Muscle ultrasonography and computed tomography in elderly trained and untrained women
1993
Ultrasonography (US) and computed tomography (CT) were compared in studying the associations between long-term physical training and quadriceps muscle mass and structure in female athletes and controls, aged 66-85 years. Muscle cross-sectional area (CSA) measured using US correlated highly with that measured using CT, but the latter technique yielded 30% higher values on average. The echo intensity of the fasciae and bone measured by US correlated positively with the mean radiological density and negatively with the relative proportion of fat obtained from CT. Low intramuscular echo intensity was accompanied by high muscle density and low relative proportion of fat. The athletes had larger …
Sonografie-gesteuerte Freihand Stanzbiopsie mediastinaler Tumoren / Ultrasound-Guided Freehand Biopsy of Mediastinal Tumors
2001
Retrospektiv wurde die Wertigkeit der sonografiegesteuerten Freihand-Biopsie bei mediastinalen Tumoren untersucht. Unter transthorakaler real-time Sonografie wurden bei 53 Patienten Biopsate nach dem core-needle-Prinzip automatisch oder manuell in Lokalanasthesie und Freihand-Technik gewonnen. Bei 52 Patienten wurde die Diagnose gesichert, in einem Fall war die Histologie erst nach Mediastinoskopie eindeutig (nodular-sklerosierendes Hodgkin-Lymphom). Komplikationen traten nicht auf. Die Methode ist zuverlassig, komplikationsarm und leicht durchzufuhren. Sie ist insbesondere bei Verdacht auf solche Erkrankungen von grosem diagnostischen Wert, bei denen die konservative Behandlung im Vordergr…
Alteration of loosely bound calcium in the guinea pig organ of Corti after treatment with diltiazem as calcium channel blocker
1997
After oral administration of the organic calcium channel blocker diltiazem to guinea pigs for 7 days, calcium ions were precipitated with potassium antimonate in the cochleae. The spatial distribution of the precipitates was studied by energy-filtering transmission electron microscopy and the amount of the ultrastructural reaction products formed was determined semiquantitatively by an image processing system. Compared with untreated control ears, the number of the formed precipitates was reduced drastically in the inner hair cells after diltiazem treatment. In addition, electron microscopic analysis revealed that the number of calcium precipitates attached at the basolateral membrane of th…
Three-dimensional/four-dimensional transperineal ultrasound: clinical utility and future prospects.
2017
During the last decade, there has been a huge advancement in the use of transperineal ultrasound (TPU) in the field of obstetrics and gynecology. Its main applications in obstetrics include the monitoring of fetal progression in labor and recently the assessment of maternal pelvic dimensions, whereas in gynecology, TPU is at present widely used for the evaluation of the female pelvic floor, opening new boundaries for the assessment of pelvic floor disorders. The association of volumetric three-dimensional techniques has largely contributed to the remarkable progress that has occurred in the use of TPU. The aim of this paper is to offer an overview of the advantages, challenges and future pe…
Invasive ovarian seromucinous carcinoma developed on an endometrioma. The determining role of transvaginal ultrasound
2021
Endometriosis is a chronic inflammatory disease that has been associated with an increased risk of ovarian cancer, especially epithelial tumors. Transvaginal ultrasound is a first-line diagnostic method for the assessment of endometriosis, and of endometriomas, the ovarian cystic form of endometriosis. Endometriomas usually have typical ultrasound features that allow them to be easily diagnosed. When atypical images are observed, such as solid areas with vascular flow, their malignancy should be ruled out, especially in peri-menopausal women. Early diagnosis of these tumors is essential because immediate surgical treatment is crucial for prognosis. Malignant neoplasms associated with endome…
Diagnostic challenges and potential early indicators of breast periprosthetic anaplastic large cell lymphoma
2020
Abstract Rationale: Anaplastic large T-cell lymphoma (BI-ALCL) is a rare primitive lymphoma described in women with breast implant prostheses, which has been arousing interest in recent years due to its potentially high social impact. The difficult diagnosis associated with the high and increasing number of prosthetic implants worldwide has led to hypothesize an underestimation of the real impact of the disease among prosthesis-bearing women. The aim of this work is to search for specific radiological signs of disease linked to the chronic inflammatory pathogenetic mechanism. Patient concerns: This work describes a case of BI-ALCL in an American woman with no personal or family history of c…
Composite femoro-tibial bypass as alternative solution in complicated revascolarization: Case report
2021
Introduction Peripheral Arterial Disease (PAD) in diabetic patients is a significant cause of Morbility. Long arterial occlusion in patient previously treated can require unusual and complex solution. Herein we report a case of complicated bypass in diabetic patient with history of bypass for bilateral popliteal aneurysm. Presentation of case A 51-year-old male, smoker, with hypertension and diabetes mellitus was referred to our hospital for rest pain in left limb and peripheral cyanosis. Ultrasound doppler (US) showed an occlusion after common femoral artery with patency of Anterior-tibial artery (ATA) two centimeters after the origin. The unavailability of adequate autologous conduit nece…