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2.
Skin Health Dis ; 4(1): e290, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38312247

RESUMO

Gynoid lipodystrophy, also called cellulite, is defined as a metabolic disorder of the subcutaneous tissue that alters body contour. It is rare in men but affects 80%-90% of adult women.The authors describe a technique for the treatment of cellulite with non-traumatic subcisionTM of septa by cannula associated with large-gel-particle hyaluronic acid (HA). It uses a special marking, a safe plan and a specific product. The product being used is Subskin Aeskins, in a subcutaneous plan as no major blood vessels were found.The authors report good aesthetic results with the proposed technique. The patients reported a high degree of satisfaction.The product chosen has high G prime and large particles, which accounts for resistance to deformation and a high lifting power. Moreover, HA is a biocompatible, absorbable product and considered a safe filler. This technique allows the treatment of an area with various surface irregularities.The Square Technique proved to be a minimally invasive technique, with fast results, no major risks and little downtime, bringing satisfaction to patients and improving their self-confidence and quality of life.

3.
Skin Health Dis ; 3(1): e155, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36751337

RESUMO

Background: All the changes the skin goes through, peaking at flaccidity, occur in the dermis and hypodermis, leading to loss of support and a lower capacity to totally accommodate displacements or any loss of subjacent volume, bringing about the onset of furrows and sagging. Improvements in facial sagging may be obtained with the administrations of substances like poly-L-lactic acid (PLLA), which triggers a tissue response through a controlled inflammatory reaction. Objectives: Compare the tissue distribution of the particles of PLLA of both products available in Brazil (Sculptra® and Rennova Elleva®) during and immediately after their subdermal administrations, with 22G cannulas, through high-resolution ultrasound imaging. Methods: A total of four patients aged between 18 and 64 years had the inner part of the upper arms divided into eight quadrants and treated with 16 ml of each product, reconstituted to correspond to 9.5 mg/ml. The sites where PLLA was injected were analyzed through the high-resolution ultrasound during (dynamic imaging) and immediately after the procedures (static imaging). Results: During Sculptra® injection, high-resolution ultrasound revealed that its distribution did not follow the trajectory of the cannula homogeneously. It was characterized by a more hyperechogenic central portion and an anechogenic peripheral portion, forming discrete posterior acoustic shadowing at times. Regarding Rennova ELLEVA® injection, the high-resolution ultrasound analysis showed a homogeneous distribution of the product across the subcutaneous tissue following the trajectory of the cannula without formation of significant interface with the surrounding tissue, maintaining the sonographic aspect of thinly granulated hyperechogenic deposits, with strong posterior acoustic shadowing during and immediately after its administration. Conclusion: Static and dynamic high-resolution ultrasound imaging show a more homogenous distribution of PLLA particles with the use of Rennova ELLEVA® when compared with Sculptra®, which may induce the formation of capsules and a subsequent more dispersed fibroplasia, with larger area of action and a possible better therapeutic result. The interest of this article lies in its originality, highlighting the differences in the tissue distribution of two different brands of PLLA particles, which can impact the clinical response to the two products - which we are researching and seems to interfere with the increase in dermal thickness.

4.
Aesthet Surg J ; 43(7): 773-783, 2023 06 14.
Artigo em Inglês | MEDLINE | ID: mdl-36594153

RESUMO

The development of high-frequency devices and transducers in recent years has enabled the growth of the use of dermatologic ultrasound. Real-time monitoring of the anatomy of the face during the application of aesthetic injectables potentially prevents complications such as vascular occlusions. Injecting physicians starting out in the practice of ultrasound-guided injections are commonly faced with practical questions about its use. In this article, based on the experience with ultrasound-guided filler injections of 2 large clinical centers in 2 countries, the authors summarize the steps involved when setting out to use ultrasound to guide injectable aesthetic procedures, such as fillers and biostimulators. First, the authors discuss factors that guide the choice of equipment and ultrasound transducers to perform the procedures. Next, a detailed discussion on practical issues related to the procedure is provided. The authors then consider the positioning of operators and equipment in the treatment field. The authors conclude by suggesting 2 possible techniques to guide injectable procedures: (1) scan before injecting or (2) scan while injecting.


Assuntos
Técnicas Cosméticas , Preenchedores Dérmicos , Humanos , Injeções , Ultrassonografia , Ultrassonografia Doppler , Técnicas Cosméticas/efeitos adversos , Preenchedores Dérmicos/efeitos adversos
5.
J Cosmet Dermatol ; 21(11): 5621-5627, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36029286

RESUMO

BACKGROUND: Ultrasound imaging is a useful tool to study the injection of fillers and biostimulators in the body. OBJECTIVE: Sonographically evaluate real-time injections of fillers and biostimulators and describe their behavior in the subcutaneous tissue of the buttocks of fresh-frozen specimen. METHODS: injection of two brands of high-density hyaluronic acid (HA), one brand of calcium hydroxyapatite (CaHA), one brand of hybrid injectable (CaHa + HA), one brand of polycaprolactone (PCL) and three brands of poly-l-lactic acid (PLLA) were performed in the subcutaneous tissue of the gluteal region under ultrasonography visualization on a fresh-frozen specimen. Videos during injection and static images immediately after injection were obtained. The sonographic aspects of the substances and their dispersion and interaction with the surrounding tissues were described. RESULTS: Real-time ultrasound showed different dispersion patterns of the two brands of HA, CaHA, hybrid injectable (CaHa + HA) and the three brands of PLLA. The sonographic aspects among the brands of PLLA were also different. CONCLUSIONS: The dynamic ultrasound evaluation of the injection of HA, CaHA, hybrid injectable (CaHa + HA), PCL and PLLA in a fresh-frozen specimen shed some light on their aspects and dispersion pattern in the buttock. If these patterns are confirmed in further studies in vivo, there will be a positive impact on the selection and development of safer and more effective techniques to enhance buttock contour.


Assuntos
Técnicas Cosméticas , Preenchedores Dérmicos , Envelhecimento da Pele , Humanos , Nádegas/diagnóstico por imagem , Durapatita , Ultrassonografia , Ácido Hialurônico
6.
J Cosmet Dermatol ; 21(5): 1967-1972, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35049130

RESUMO

INTRODUCTION: Enhancing and altering body contours has increasingly been the focus of new technologies and techniques in aesthetic treatments. The buttocks are seen as a symbol of beauty, sensuality, and attraction. PATIENTS AND METHODS: The authors described a technique for female and male gluteal augmentation. It uses a special marking, a safe plan, and a specific product. The patients chosen for this technique wanted to have an augmentation or projection effect on the buttocks, but were not willing to undergo surgery. The product used was Sofiderm Subskin Aeskins. The plan of injection was the subcutaneous as no major blood vessels were found. RESULTS: The authors report good aesthetic results with the proposed technique. The patients reported a high degree of satisfaction. DISCUSSION: The product chosen has a high G prime and a larger molecule size, which accounts for resistance to deformation and a high lifting power. Thus, result can be visible in a large body area. As the anatomy between male and female buttocks are different, different techniques were used for each gender. CONCLUSION: The LL body contour technique for gluteal augmentation proved to be a minimally invasive technique, with quick results, without major risks and downtime.


Assuntos
Ácido Hialurônico , Lipectomia , Beleza , Nádegas/anatomia & histologia , Nádegas/cirurgia , Estética , Feminino , Humanos , Lipectomia/métodos , Masculino
7.
Radiol Bras ; 53(1): 47-55, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32313337

RESUMO

Hepatic steatosis, or fatty liver disease, occurs due to the accumulation of lipids in hepatocytes. When it becomes chronic, lobular inflammation develops and the disease can evolve to hepatic fibrosis, liver cirrhosis, or hepatocellular carcinoma. Early diagnosis is desirable because patients diagnosed in the early stage of the disease respond better to treatment. In the early stages of fatty liver disease, the physical examination is often unremarkable. Fatty liver disease and hepatic fibrosis can be diagnosed and monitored through laboratory tests, imaging, and biopsy. Among the imaging methods, ultrasound stands out as an effective means of diagnosing and following patients with liver disease. Ultrasound used in conjunction with elastography (ultrasound elastography) has recently shown great utility in the follow-up of such patients. Ultrasound elastography studies the degree of deformation (stiffness) of an organ or lesion, so that when there is hardening, fibrosis, or cirrhosis of the liver, those alterations are well demonstrated. In this review article, we discuss the application of the different types of ultrasound elastography for liver studies: transient elastography, point shear wave elastography, and two-dimensional shear wave elastography. Although magnetic resonance elastography may also be used in the analysis of liver fibrosis, it will not be addressed in this article.

8.
Radiol. bras ; 53(1): 47-55, Jan.-Feb. 2020. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1057041

RESUMO

Abstract Hepatic steatosis, or fatty liver disease, occurs due to the accumulation of lipids in hepatocytes. When it becomes chronic, lobular inflammation develops and the disease can evolve to hepatic fibrosis, liver cirrhosis, or hepatocellular carcinoma. Early diagnosis is desirable because patients diagnosed in the early stage of the disease respond better to treatment. In the early stages of fatty liver disease, the physical examination is often unremarkable. Fatty liver disease and hepatic fibrosis can be diagnosed and monitored through laboratory tests, imaging, and biopsy. Among the imaging methods, ultrasound stands out as an effective means of diagnosing and following patients with liver disease. Ultrasound used in conjunction with elastography (ultrasound elastography) has recently shown great utility in the follow-up of such patients. Ultrasound elastography studies the degree of deformation (stiffness) of an organ or lesion, so that when there is hardening, fibrosis, or cirrhosis of the liver, those alterations are well demonstrated. In this review article, we discuss the application of the different types of ultrasound elastography for liver studies: transient elastography, point shear wave elastography, and two-dimensional shear wave elastography. Although magnetic resonance elastography may also be used in the analysis of liver fibrosis, it will not be addressed in this article.


Resumo Esteatose hepática ocorre pelo acúmulo de lipídios nos hepatócitos, sua cronificação cursa com inflamação lobular e evolui com fibrose hepática, cirrose e carcinoma hepatocelular. O diagnóstico precoce do acometimento hepático é desejável em razão da melhor resposta terapêutica dos pacientes na fase inicial da doença. O exame físico nas fases iniciais da doença não apresenta alterações. O diagnóstico e o controle evolutivo da esteatose e fibrose hepática podem ser realizados por exames laboratoriais, exames de imagens e biópsia. Entre os exames de imagem, destaca-se a ultrassonografia (US) no diagnóstico e acompanhamento dos pacientes com doença hepática. Atualmente, a US associada à elastografia vem se destacando para acompanhamento desses pacientes. A elastografia por US estuda o grau de deformação (ou dureza) do órgão ou lesão, de modo que quando há endurecimento do fígado, por fibrose ou cirrose, essa alteração é bem demonstrada na elastografia por US. Neste artigo de revisão nos propusemos a discutir a aplicação dos diversos tipos de elastografia por US para estudo do fígado: elastografia transitória, point-shear wave elastography e 2D-shear wave elastography. A elastografia por ressonância magnética também pode ser utilizada na análise de fibrose hepática, mas não será abordada neste artigo.

9.
Radiol Bras ; 52(4): 247-253, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31435087

RESUMO

The elastic properties of tissue have always been of interest in clinical practice. In the past, the identification of structures that were stiffer on physical palpation would raise the suspicion that "there was something wrong". With the development and advancement of medicine, there proved to be a true correlation in the prediction of malignancy of a lesion: malignant disease tends to stiffen the affected tissue, either by increased cell proliferation or fibrosis. Palpation is the oldest method for the detection of thyroid nodules, which is informed by the knowledge that malignant thyroid lesions tend to be much harder than benign ones. Unfortunately, palpation is a highly subjective method that is dependent on the size and location of the lesion, as well as on the skill of the physician. In cases where these nodules are very small or are located in deep regions, their detection by palpation is difficult or even impossible. In addition, although a malignant lesion differs in terms of elasticity, it may not have echogenic properties, preventing its detection by conventional ultrasound. Imaging that indicates the stiffness or deformation of tissues, through the use of ultrasound elastography techniques, adds new information related to their structural formation. In this article, we review the basic physical principles of elastography and the evolution of the method for the evaluation of thyroid nodules, as well as the limitations of and future perspectives for its use.


A propriedade elástica dos tecidos sempre foi motivo de interesse na prática clínica. A palpação física de estruturas mais rígidas levantava a suspeita de que "havia algo estranho" e isso se mostrou, com o desenvolvimento e avanços da medicina, uma correlação verdadeira na predição de malignidade de uma lesão: a doença maligna tende a enrijecer o tecido acometido, quer por proliferação celular aumentada ou por fibrose. A palpação é o método mais antigo para a detecção de nódulos tireoidianos. Lesões tireoidianas malignas tendem a ser muito mais duras do que as benignas. Infelizmente, a palpação é um método altamente subjetivo e depende do tamanho e localização da lesão e da habilidade do médico. Nos casos em que esses nódulos são muito pequenos ou estão localizados em regiões profundas, a sua detecção por palpação é dificultada ou até mesmo impossível. Além disso, mesmo sendo elasticamente diferente, a lesão pode não apresentar propriedades ecogênicas, impedindo a sua detecção por ultrassonografia convencional. A imagem da rigidez ou deformação desses tecidos acrescenta novas informações relacionadas à sua formação estrutural por meio das técnicas de elastografia. Revisamos, neste artigo, os princípios físicos básicos e a evolução da elastografia para avaliação de nódulos tireoidianos, bem como as limitações e perspectivas futuras do uso dessa técnica.

10.
Clin Cancer Res ; 25(22): 6683-6691, 2019 11 15.
Artigo em Inglês | MEDLINE | ID: mdl-31444249

RESUMO

PURPOSE: Quantitative ultrasound approaches can capture tissue morphologic properties to augment clinical diagnostics. This study aims to clinically assess whether quantitative ultrasound spectroscopy (QUS) parameters measured in hepatocellular carcinoma (HCC) tissues can be differentiated from those measured in at-risk or healthy liver parenchyma. EXPERIMENTAL DESIGN: This prospective Health Insurance Portability and Accountability Act (HIPAA)-compliant study was approved by the Institutional Review Board. Fifteen patients with HCC, 15 non-HCC patients with chronic liver disease, and 15 healthy volunteers were included (31.1% women; 68.9% men). Ultrasound radiofrequency data were acquired in each patient in both liver lobes at two focal depths (3/9 cm). Region of interests (ROIs) were drawn on HCC and liver parenchyma. The average normalized power spectrum for each ROI was extracted, and a linear regression was fit within the -6 dB bandwidth, from which the midband fit (MBF), spectral intercept (SI), and spectral slope (SS) were extracted. Differences in QUS parameters between the ROIs were tested by a mixed-effects regression. RESULTS: There was a significant intraindividual difference in MBF, SS, and SI between HCC and adjacent liver parenchyma (P < 0.001), and a significant interindividual difference between HCC and at-risk and healthy non-HCC parenchyma (P < 0.001). In patients with HCC, cirrhosis (n = 13) did not significantly change any of the three parameters (P > 0.8) in differentiating HCC from non-HCC parenchyma. MBF (P = 0.12), SI (P = 0.33), and SS (P = 0.57) were not significantly different in non-HCC tissue among the groups. CONCLUSIONS: The QUS parameters are significantly different in HCC versus non-HCC liver parenchyma, independent of underlying cirrhosis. This could be leveraged for improved HCC detection with ultrasound in the future.


Assuntos
Carcinoma Hepatocelular/diagnóstico por imagem , Carcinoma Hepatocelular/patologia , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/patologia , Fígado/diagnóstico por imagem , Análise Espectral , Ultrassonografia , Idoso , Idoso de 80 Anos ou mais , Diagnóstico Diferencial , Gerenciamento Clínico , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Cirrose Hepática/diagnóstico por imagem , Cirrose Hepática/patologia , Masculino , Pessoa de Meia-Idade , Curva ROC , Medição de Risco , Análise Espectral/métodos , Ultrassonografia/métodos , Fluxo de Trabalho
11.
Ultrasound Med Biol ; 45(8): 1944-1954, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31133445

RESUMO

The question of whether ultrasound point shear wave elastography can differentiate renal cell carcinoma (RCC) from angiomyolipoma (AML) is controversial. This study prospectively enrolled 51 patients with 52 renal tumors (42 RCCs, 10 AMLs). We obtained 10 measurements of shear wave velocity (SWV) in the renal tumor, cortex and medulla. Median SWV was first used to classify RCC versus AML. Next, the prediction accuracy of 4 machine learning algorithms-logistic regression, naïve Bayes, quadratic discriminant analysis and support vector machines (SVMs)-was evaluated, using statistical inputs from the tumor, cortex and combined statistical inputs from tumor, cortex and medulla. After leave-one-out cross validation, models were evaluated using the area under the receiver operating characteristic (ROC) curve (AUC). Tumor median SWV performed poorly (AUC = 0.62; p = 0.23). Except logistic regression, all machine learning algorithms reached statistical significance using combined statistical inputs (AUC = 0.78-0.98; p < 7.1 × 10-3). SVMs demonstrated 94% accuracy (AUC = 0.98; p = 3.13 × 10-6) and clearly outperformed median SWV in differentiating RCC from AML (p = 2.8 × 10-4).


Assuntos
Angiomiolipoma/diagnóstico por imagem , Carcinoma de Células Renais/diagnóstico por imagem , Técnicas de Imagem por Elasticidade/métodos , Interpretação de Imagem Assistida por Computador/métodos , Neoplasias Renais/diagnóstico por imagem , Aprendizado de Máquina , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Diagnóstico Diferencial , Feminino , Humanos , Rim/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Adulto Jovem
12.
Eur Radiol ; 28(5): 2068-2076, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29170798

RESUMO

OBJECTIVES: To evaluate the feasibility and time saving of fusing CT and MR enterography with ultrasound for ultrasound molecular imaging (USMI) of inflammation in an acute small bowel inflammation of swine. METHODS: Nine swine with ileitis were scanned with either CT (n = 3) or MR (n = 6) enterography. Imaging times to load CT/MR images onto a clinical ultrasound machine, fuse them to ultrasound with an anatomical landmark-based approach, and identify ileitis were compared to the imaging times without anatomical road mapping. Inflammation was then assessed by USMI using dual selectin-targeted (MBSelectin) and control (MBControl) contrast agents in diseased and healthy control bowel segments, followed by ex vivo histology. RESULTS: Cross-sectional image fusion with ultrasound was feasible with an alignment error of 13.9 ± 9.7 mm. Anatomical road mapping significantly reduced (P < 0.001) scanning times by 40%. Localising ileitis was achieved within 1.0 min. Subsequently performed USMI demonstrated significantly (P < 0.001) higher imaging signal using MBSelectin compared to MBControl and histology confirmed a significantly higher inflammation score (P = 0.006) and P- and E-selectin expression (P ≤ 0.02) in inflamed vs. healthy bowel. CONCLUSIONS: Fusion of CT and MR enterography data sets with ultrasound in real time is feasible and allows rapid anatomical localisation of ileitis for subsequent quantification of inflammation using USMI. KEY POINTS: • Real-time fusion of CT/MRI with ultrasound to localise ileitis is feasible. • Anatomical road mapping using CT/MRI significantly decreases the scanning time for USMI. • USMI allows quantification of inflammation in swine, verified with ex vivo histology.


Assuntos
Ileíte/diagnóstico , Intestino Delgado/diagnóstico por imagem , Imageamento por Ressonância Magnética/métodos , Imagem Molecular/métodos , Tomografia Computadorizada por Raios X/métodos , Ultrassonografia/métodos , Animais , Inflamação/diagnóstico , Suínos
13.
Theranostics ; 7(15): 3745-3758, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29109773

RESUMO

Purpose: To perform a clinical assessment of quantitative three-dimensional (3D) dynamic contrast-enhanced ultrasound (DCE-US) feasibility and repeatability in patients with liver metastasis, and to evaluate the extent of quantitative perfusion parameter sampling errors in 2D compared to 3D DCE-US imaging. Materials and Methods: Twenty consecutive 3D DCE-US scans of liver metastases were performed in 11 patients (45% women; mean age, 54.5 years; range, 48-60 years; 55% men; mean age, 57.6 years; range, 47-68 years). Pairs of repeated disruption-replenishment and bolus DCE-US images were acquired to determine repeatability of parameters. Disruption-replenishment was carried out by infusing 0.9 mL of microbubbles (Definity; Latheus Medical Imaging) diluted in 35.1 mL of saline over 8 min. Bolus consisted of intravenous injection of 0.2 mL microbubbles. Volumes-of-interest (VOI) and regions-or-interest (ROI) were segmented by two different readers in images to extract 3D and 2D perfusion parameters, respectively. Disruption-replenishment parameters were: relative blood volume (rBV), relative blood flow (rBF). Bolus parameters included: time-to-peak (TP), peak enhancement (PE), area-under-the-curve (AUC), and mean-transit-time (MTT). Results: Clinical feasibility and repeatability of 3D DCE-US using both the destruction-replenishment and bolus technique was demonstrated. The repeatability of 3D measurements between pairs of repeated acquisitions was assessed with the concordance correlation coefficient (CCC), and found to be excellent for all parameters (CCC > 0.80), except for the TP (0.74) and MTT (0.30) parameters. The CCC between readers was found to be excellent (CCC > 0.80) for all parameters except for TP (0.71) and MTT (0.52). There was a large Coefficient of Variation (COV) in intra-tumor measurements for 2D parameters (0.18-0.52). Same-tumor measurements made in 3D were significantly different (P = 0.001) than measurements made in 2D; a percent difference of up to 86% was observed between measurements made in 2D compared to 3D in the same tumor. Conclusions: 3D DCE-US imaging of liver metastases with a matrix array transducer is feasible and repeatable in the clinic. Results support 3D instead of 2D DCE US imaging to minimize sampling errors due to tumor heterogeneity.


Assuntos
Imageamento Tridimensional/métodos , Neoplasias Hepáticas/diagnóstico por imagem , Ultrassonografia/métodos , Meios de Contraste , Humanos , Microbolhas , Projetos Piloto
14.
Ultrasound Med Biol ; 43(12): 2774-2782, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-28967501

RESUMO

Ultrasound-based shear wave elastography (SWE) has recently gained substantial attention for non-invasive assessment of liver fibrosis. The purpose of this study was to perform an intra-individual comparison between 2-D shear wave elastography (2-D-SWE with a GE system) and Virtual Touch Tissue Quantification (VTTQ with a Siemens system) to assess whether these can be used interchangeably to grade fibrosis. Ninety-three patients (51 men, 42 women; mean age, 54 y) with liver disease of various etiologies (hepatitis B virus = 47, hepatitis C virus = 22; alcohol = 6, non-alcoholic steatohepatitis = 5, other = 13) were included. Using published system-specific shear wave speed cutoff values, liver fibrosis was classified into clinically non-significant (F0/F1) and significant (≥F2) fibrosis. Results indicated that intra-modality repeatability was excellent for both techniques (GE 2-D-SWE: intra-class correlation coefficient = 0.89 [0.84-0.93]; VTTQ: intra-class correlation coefficient = 0.90 [0.86-0.93]). Intra-modality classification agreement for fibrosis grading was good to excellent (GE 2-D-SWE: κ = 0.65, VTTQ: κ = 0.82). However, inter-modality agreement for fibrosis grading was only fair (κ = 0.31) using published system-specific shear wave speed cutoff values of fibrosis. In conclusion, although both GE 2-D-SWE and Siemens VTTQ exhibit good to excellent intra-modality repeatability, inter-modality agreement is only fair, suggesting that these should not be used interchangeably.


Assuntos
Técnicas de Imagem por Elasticidade/métodos , Processamento de Imagem Assistida por Computador/métodos , Cirrose Hepática/diagnóstico por imagem , Cirrose Hepática/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Fígado/diagnóstico por imagem , Fígado/patologia , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Estudos Retrospectivos , Índice de Gravidade de Doença , Adulto Jovem
15.
Theranostics ; 7(5): 1303-1329, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28435467

RESUMO

Elastography-based imaging techniques have received substantial attention in recent years for non-invasive assessment of tissue mechanical properties. These techniques take advantage of changed soft tissue elasticity in various pathologies to yield qualitative and quantitative information that can be used for diagnostic purposes. Measurements are acquired in specialized imaging modes that can detect tissue stiffness in response to an applied mechanical force (compression or shear wave). Ultrasound-based methods are of particular interest due to its many inherent advantages, such as wide availability including at the bedside and relatively low cost. Several ultrasound elastography techniques using different excitation methods have been developed. In general, these can be classified into strain imaging methods that use internal or external compression stimuli, and shear wave imaging that use ultrasound-generated traveling shear wave stimuli. While ultrasound elastography has shown promising results for non-invasive assessment of liver fibrosis, new applications in breast, thyroid, prostate, kidney and lymph node imaging are emerging. Here, we review the basic principles, foundation physics, and limitations of ultrasound elastography and summarize its current clinical use and ongoing developments in various clinical applications.


Assuntos
Técnicas de Imagem por Elasticidade/métodos , Ultrassonografia/métodos , Humanos
16.
Autops Case Rep ; 3(4): 63-68, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-28584809

RESUMO

Acute pancreatitis (AP) is a potential life-threatening disease, which originates from inflammatory involvement of the pancreas and surrounding tissues. Serious complications eventuate and treatment is difficult. AP is classified in both interstitial edematous pancreatitis, which occurs in 70-80% of patients, and necrotizing pancreatitis, which occurs in 20-30% of patients. Diagnosis is based on the presence of two of the following criteria: abdominal pain, increased serum determination of amylase and/or lipase more than three times the reference value, and characteristic tomographic findings. Among the latter, there is the pancreatic and surrounding tissue damage as well as that related to distant organ involvement. This case report shows the fatal case of a male patient with a history of heavy alcoholic abuse admitted with the diagnosis of necrotizing pancreatitis. The authors call attention to the unusual tomographic findings; namely, a huge duodenal hematoma and a large hemoperitoneum, ischemic involvement of the spleen and kidneys, as well as pancreatic and peripancreatic necrosis.

17.
Chest ; 141(1): 183-189, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21680642

RESUMO

OBJECTIVES: This study aimed to evaluate a panel of proinflammatory and antiinflammatory cytokines in noncomplicated and complicated parapneumonic pleural effusions and to correlate their levels with pleural fluid biochemical parameters. METHODS: Serum and pleural effusion were collected from 60 patients with noncomplicated (n = 26) or complicated (n = 34) parapneumonic effusions and assayed for cytologic, biochemical, and proinflammatory and antiinflammatory cytokines. Student t test was used to compare serum and pleural fluid values, Spearman correlation to analyze the relationship between pleural fluid cytokines and biochemical parameters, and accuracy of pleural fluid cytokine levels to determine the optimal cutoff value for identification of complicated effusions. Corrections for multiple comparisons were applied and a P value < .05 was accepted as significant. RESULTS: Serum and pleural fluid cytokine levels of IL-8, vascular endothelial growth factor (VEGF), IL-10, and tumor necrosis factor (TNF) soluble receptor (sR) II were similar between groups. In contrast, complicated effusions had higher levels of pleural fluid IL-1ß, IL-1 receptor antagonist (ra), and TNF sRI. Negative correlations were found between pleural fluid glucose with IL-1ß and TNF sRI and positive correlations between lactic dehydrogenate (LDH) with IL-1ß, IL-8, and VEGF. Pleural fluid levels of IL-1ß, IL-1ra, and TNF sRI were more accurate than IL-8, VEGF, IL-10, and TNF sRII in discriminating complicated effusions. CONCLUSIONS: Both proinflammatory and antiinflammatory cytokine levels in pleural fluid are elevated in complicated in comparison with noncomplicated parapneumonic pleural effusions, and they correlate with both pleural fluid glucose and LDH levels. IL-1ß, IL-1ra, and TNF sRI had higher sensitivity and specificity than IL-8, VEGF, IL-10, and TNF sRII in discriminating complicated effusions.


Assuntos
Citocinas/análise , Exsudatos e Transudatos/química , Inflamação/metabolismo , Derrame Pleural/metabolismo , Biomarcadores/análise , Diagnóstico Diferencial , Humanos , Derrame Pleural/diagnóstico , Estudos Prospectivos , Sensibilidade e Especificidade
18.
Einstein (Säo Paulo) ; 7(3)set. 2009. tab
Artigo em Inglês, Português | LILACS | ID: lil-530797

RESUMO

Objective: To evaluate the quality of life of women with urinary incontinence, as well as its association with other demographic and socioeconomic factors that may influence their perception of quality of life. Methods: A total of 50 patients were submitted to the Kings Health questionnaire and to other independent scales to evaluate severity of urinary incontinence, as well as presence and intensity of urinary symptoms. Results: One third of women considered their health status bad or very bad. Half of the patients referred that urinary incontinence symptoms greatly affected their quality of life. Patients with symptoms of overactive bladder and mixed urinary incontinence presented statistically higher scores of quality of life in the domain ?sleep/mood?. There was no statistical difference between the groups concerning other quality of life domains, sociodemographic factors, and the correlation between bladder problem and general health perception. Conclusions: Most women with urinary incontinence considered their health status from regular to very bad. The sociodemographic factors did not influence the quality of life of the patients studied. The Kings Health questionnaire showed a negative impact of urinary incontinence on patient?s quality of life


Objetivo: Avaliar a qualidade de vida em mulheres com incontinência urinária; e a associação de outros fatores demográficos e socioeconômicos que poderiam influenciar a percepção de qualidade de vida. Métodos: Cinquenta pacientes foram submetidas ao Kings Health questionnaire e a outras duas escalas independentes para avaliar a gravidade da incontinência urinária, a presença e a intensidade dos sintomas urinários. Resultados: 1/3 das mulheres classificou seu estado de saúde como ruim ou muito ruim. Metade das pacientes referiu que os sintomas ligados a incontinência urinária afetaram muito a qualidade de vida. As pacientes com sintomas de bexiga hiperativa e incontinência urinária mista apresentaram escores de qualidade de vida estatisticamente maiores no domínio ?sono e disposição?. Não houve diferença estatística entre os grupos em relação aos demais domínios de qualidade de vida, a fatores sociodemográficos, e na correlação do problema vesical com a percepção geral da saúde. Conclusões: A maioria das mulheres com incontinência urinária considerou sua saúde variando de regular a muito ruim. Os fatores sociodemográficos não influenciaram a qualidade de vida das pacientes estudadas. O Kings Health questionnaire evidenciou impacto negativo da incontinência urinária na qualidade de vida das pacientes

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