Hounsfield Units
Mostrando 1-12 de 16 artigos, teses e dissertações.
-
1. Editorial Comment: Upper urinary tract stone compositions: the role of age and gender
ABSTRACT Purpose: Clear cell papillary (CCP) renal cell carcinoma (RCC) is a new subtype of RCC that was formally recognized by the International Society of Urological Pathology Vancouver Classification of Renal Neoplasia in 2013. Subsequently, CCP RCC was added to the 2016 World Health Organization Classification of Tumors of the Urinary System and Male Ge
Int. braz j urol.. Publicado em: 2020-02
-
2. Computed tomography imaging characteristics of clear cell papillary renal cell carcinoma
ABSTRACT Purpose: Clear cell papillary (CCP) renal cell carcinoma (RCC) is a new subtype of RCC that was formally recognized by the International Society of Urological Pathology Vancouver Classification of Renal Neoplasia in 2013. Subsequently, CCP RCC was added to the 2016 World Health Organization Classification of Tumors of the Urinary System and Male Ge
Int. braz j urol.. Publicado em: 2020-02
-
3. Usefulness of measuring renal papillae in Hounsfield units in stone - forming patients
ABSTRACT Introduction: The aim of this work is to study the density of the renal papillae in stone-forming patients and to determine its usefulness. Materials and Methods: This study included a total of 79 patients diagnosed with renal stones and on whom a computed tomography without contrast was performed from June 2014 to May 2015. The patients were divi
Int. braz j urol.. Publicado em: 2016-10
-
4. The S.T.O.N.E. Score: A new assessment tool to predict stone free rates in ureteroscopy from pre-operative radiological features
Objective: To develop a user friendly system (S.T.O.N.E. Score) to quantify and describe stone characteristics provided by computed axial tomography scan to predict ureteroscopy outcomes and to evaluate the characteristics that are thought to affect stone free rates. Materials and Methods: The S.T.O.N.E. score consists of 5 stone characteristics: (S)ize,
Int. braz j urol.. Publicado em: 2014-01
-
5. Bone density: comparative evaluation of Hounsfield units in multislice and cone-beam computed tomography
The aim of this study was to evaluate the validity of the bone density value of potential implant sites in HU obtained by a specific cone-beam computed tomography (CBCT) device. In this study, the HU values obtained using a MSCT scanner were used as the gold standard. Twenty mandibles (40 potential implant sites) were scanned using an MSCT scanner (Somatom S
Braz. oral res.. Publicado em: 2012-12
-
6. Predicting dysthyroid optic neuropathy using computed tomography volumetric analyses of orbital structures
OBJECTIVE: To evaluate the ability of orbital apex crowding volume measurements calculated with multidetector-computed tomography to detect dysthyroid optic neuropathy. METHODS: Ninety-three patients with Graves' orbitopathy were studied prospectively. All of the patients underwent a complete neuro-ophthalmic examination and computed tomography scanning. Vol
Clinics. Publicado em: 2012-08
-
7. A scanographic assessment of alveolar recruitment and overinflation during high frequence ventilation : preliminary results in three patients
BACKGROUND AND OBJECTIVES: High-frequency ventilation (HFV) may offer an attractive alternative to conventional strategies in the ventilation of the acute respiratory distress syndrome (ARDS) or acute lung injury (ALI) because it can minimize lung injury. Maintaining ventilation between lower and upper inflection points, it can warrant alveolar recruitment w
Publicado em: 2011
-
8. Avaliação dimensional e do coeficiente de atenuação de ameloblastomas e tumores odontogênicos queratocísticos em imagens axiais por tomografia computadorizada. / Dimensional analysis and assessment of ct valves of ameloblastomas and odontogenic keratocysttic tumors on ct axial images.
Os ameloblastomas e tumores odontogênicos queratocísticos são relativamente comuns dentre as neoplasias odontogênicas, geralmente agressivos e com potencial de recidiva. Suas características clínicas e radiográficas são variáveis e o diagnóstico diferencial a partir de imagens convencionais possui importantes limitações. A tomografia computadoriz
Publicado em: 2008
-
9. Evaluation of positions effects related to gravitacional pulmonary dependent densities in dogs (Canis familiaris) by computed tomography / Avaliação dos efeitos do posicionamento relacionados à opacificação pulmonar gravitacional dependente em cães (Canis familiaris) através da tomografia computadorizada
Computed tomography (CT) is a diagnostic method of election to the lungs evaluation. However, the pulmonary atelectasis or gravitacional dependent pulmonary densities, wich is observed during general anesthesia or long-term of recumbency, could increase the risk of obscuring pulmonary lesions, such metastasis. The aim of this study was to compare the recumbe
Publicado em: 2005
-
10. Identification of rounded atelectasis in workers exposed to asbestos by contrast helical computed tomography
Rounded atelectasis (RA) is a benign and unusual form of subpleural lung collapse that has been described mostly in asbestos-exposed workers. This form of atelectasis manifests as a lung nodule and can be confused with bronchogenic carcinoma upon conventional radiologic examination. The objective of the present study was to evaluate the variation in contrast
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-10
-
11. A randomized double-blind study of the short-time treatment of obese patients with nonalcoholic fatty liver disease with ursodeoxycholic acid
In order to determine the effect of ursodeoxycholic acid on nonalcoholic fatty liver disease, 30 patients with body mass indices higher than 25, serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST) or gamma-glutamyltransferase (gamma-GT) at least more than 1.5 times the upper limit of normality, and hepatic steatosis demonstrated
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-06
-
12. The significance of the incidental finding of basal ganglia calcification on computed tomography.
Basal ganglia calcification was found as an incidental finding in 42 out of 7000 patients who underwent computed tomography. The calcification showed on plain skull radiography when the maximum density on computed tomography exceeded 100 Hounsfield units. The 26 patients with basal ganglia calcification detected on computed tomography who were available for