Ultrasound Radiation
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Ultrasound guided endoscopic combined Intrarenal surgery – 10 steps for the success
ABSTRACT Background: Endoscopic combined intrarenal surgery (ECIRS) has been used to treat complex kidney stones (1). The combined use of ultrasound (US) has the potential to improve safety and reduce radiation exposure, however, it is still underutilized (2). Objectives: Our objective is to describe, in a step-by-step manner, the ultrasound-guided ECIRS (
International braz j urol. Publicado em: 2022
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2. Comparison of Clinical Examination and Various Imaging Modalities in the Diagnosis of Head and Neck Cancer
Abstract Introduction Squamous cell Carcinoma of the Head and Neck (HNSCC) is the most common tumor entity of malignant processes in the head and neck area. Due to the metastasizing behavior of these tumors, the staging is indispensable for the treatment planning and requires imaging techniques, which are sensitive, specific, and as far as possible cost-eff
Int. Arch. Otorhinolaryngol.. Publicado em: 2021-04
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3. Point-of-care ultrasound by the pediatrician in the diagnosis and follow-up of community-acquired pneumonia,
Abstract Objectives: To review, analyze, and present the available evidence on the usefulness of point-of-care pulmonary ultrasound in the diagnosis and monitoring of community-acquired pneumonia (CAP), aiming to facilitate its potential inclusion into pediatric clinical reference guidelines. Source of data: A non-systematic research was carried out in the
J. Pediatr. (Rio J.). Publicado em: 2021-02
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4. Staghorn renal stones: what the urologist needs to know
ABSTRACT Patients with staghorn renal stones are challenging cases, requiring careful preoperative evaluation and close follow-up to avoid stone recurrence. In this article we aim to discuss the main topics related to staghorn renal stones with focus on surgical approach. Most of staghorn renal stones are composed of struvite (magnesium ammonium phosphate) a
Int. braz j urol.. Publicado em: 2020-12
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5. Penile emergencies: a review of the main conditions
Resumo As condições agudas do pênis são raras, geralmente relacionadas a causas traumáticas, vasculares ou infecciosas, e muitas vezes requerem avaliação médica imediata. As emergências penianas podem ter tratamento conservador ou cirúrgico e muitas vezes dependem dos exames de imagem. A ultrassonografia é a modalidade de imagem de escolha na aval
Radiol Bras. Publicado em: 18/04/2019
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6. Aggressive papillary thyroid carcinoma in a child with type 2 congenital generalized lipodystrophy
SUMMARY Thyroid carcinoma (TC) is rare in children, particularly in those aged < 10 years. Several studies have demonstrated a correlation between neoplasms and hyperinsulinemia and insulin resistance, which are often associated with a higher risk for and/or aggressiveness of the neoplasm. Congenital generalized lipodystrophy (CGL) with autosomal recessive i
Arch. Endocrinol. Metab.. Publicado em: 2019-01
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7. Use of Mixture Design with Minimal Restrictions to Optimize an Extraction Procedure Employing Diluted Acids Assisted by Ultrasound and Microwave for Nutrient Element Determination in Vegetal Samples
In this work, it was developed an alternative analytical strategy for the preparation of vegetal samples extracted with diluted acids and assisted by ultrasound and microwave radiation for the determination of nutrients elements by fast sequential flame atomic absorption spectrometer. The conditions optimized using univariate and multivariate methodologies f
J. Braz. Chem. Soc.. Publicado em: 2018-06
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8. Mean scatterer space estimation from ultrasound signals combining singular spectral analysis and entropy
AbstractIntroduction: Ultrasound (US) is a nonionizing radiation capable of real time imaging at low cost. Its most attractive application is quantitative tissue characterization with the objective of differentiating normal tissues from diseased tissues. In this study, an automated method using singular spectrum analysis (SSA) to estimate the mean scatterer
Res. Biomed. Eng.. Publicado em: 2018-06
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9. Commercial and Noncommercial Peroxidases Activity under Ultrasound and Microwave Treatment: a Pretreatment to Improve Wastewater Treatment
This study aimed at evaluating the activity of peroxidases after ultrasound and microwave radiation exposure as an alternative to the wastewater treatment improvement. The results showed that after treatment with ultrasound using a power of 30% and a temperature of 55 °C was obtained an increase in relative activity, 129.5% in the enzyme from rice bran, 147
J. Braz. Chem. Soc.. Publicado em: 2017-10
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10. Evaluation of gloves as a water bag coupling agent for therapeutic ultrasound
Abstract Introduction Therapeutic ultrasound (TUS) is a widespread modality in physiotherapy, and the water bag technique is a coupling method employed in the presence of anatomical irregularities in the treatment area. The aim of the present study is to evaluate the acoustic attenuation of the water bag and its effectiveness as a TUS coupling agent. Metho
Res. Biomed. Eng.. Publicado em: 27/03/2017
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11. Complete supine PCNL: ultrasound vs. fluoroscopic guided: a randomized clinical trial
ABSTRACT Introduction and Hypothesis: To compare complications and outcomes of complete supine percutaneous nephrolithotomy (csPCNL) with ultrasound guided and fluoroscopically guided procedure. Materials and Methods: In this randomized clinical trial study from January 2009 to September 2010, 26 of 51 patients with renal stones underwent csPCNL with ultra
Int. braz j urol.. Publicado em: 2016-08
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12. Determination of Metal Loading in Heterogeneous Catalyst by Slurry Sampling Flame Atomic Absorption Spectrometry
Quantification of metal loading in supported catalysts is imperative; however, the analytical methods are usually time-consuming, expensive, and require sophisticated equipment and sample extraction with hazardous and corrosive strong acids. Herein, we report a new method for quantification of metal in supported catalysts using slurry sampling flame atomic a
J. Braz. Chem. Soc.. Publicado em: 2015-02