34 documents found, page 1 of 4
Enhancement patterns of adrenal nodules on magnetic resonance imaging
Yamauchi,Fernando Ide; Lemos,George Ramos; Dubinco,André; Paiva,Omir Antunes; Mussi,Thais Caldara; Baroni,Ronaldo HuebABSTRACT Objective: To compare enhancement patterns of typical adrenal adenomas, lipid-poor adenomas, and non-adenomas on magnetic resonance imaging (MRI). Materials and Methods: Evaluation of adrenal nodules larger than 1.0 cm, with at least 2-year follow-up, evaluated on MRI in January 2007 and December 2016. Two different protocols were included - upper abdomen MRI (delayed phase after 3 minutes) and abdomen...
Evaluation of the blood-oxygen-level-dependent (BOLD) sequence with 3 Tesla dev...
Mendes,Guilherme Falleiros; Falsarella,Priscila Mina; Garcia,Rodrigo Gobbo; Sanches,Liana Guerra; Baroni,Ronaldo HuebABSTRACT Objective To evaluate the ability of blood-oxygen-level-dependent (BOLD) magnetic resonance imaging at 3 Tesla to measure tissue oxygen bioavailability based on R2* values, and to differentiate between acute tubular necrosis and acute rejection compared to renal biopsy (gold standard). Methods A prospective, single-center study, with patients submitted to renal transplantation between 2013 and 2014, wh...
Practical recommendations for the safe use of gadolinium in magnetic resonance ...
Baroni,Ronaldo Hueb; Bauab Jr.,Tufik; Bittencourt,Leonardo Kayat; D’Ippolito,Giuseppe; Goldman,Suzan Menasce; Hohgraefe Neto,Guilherme; Manzella,AdonisAbstract Objective: To assess the practical aspects of the use of various gadolinium-based contrast agents (GBCAs) by radiologists. Materials and Methods: Ten experienced radiologists from different regions of Brazil participated in a Delphi panel querying their use of various GBCAs, including linear and macrocyclic classes (1.0 and 0.5 M), in terms of the choice of agent, volume and dosage of the agents, and a...
Abdominal symptoms as initial manifestation of COVID-19: a case series
Amaral,Lucas Tadashi Wada; Brito,Vanessa Mizubuti; Beraldo,Gabriel Laverdi; Fonseca,Eduardo Kaiser Ururahy Nunes; Yokoo,Patrícia; Talans,AleyABSTRACT The COVID-19 became a pandemic in early 2020. It was found, at first, that the main manifestations of this new virus occur through respiratory and constitutional symptoms. Therefore, chest tomography was elected as the best imaging test to assess the extent of pulmonary involvement and as a good prognostic predictor for the disease. However, as new studies were produced, the gastrointestinal involvemen...
Prostate volume measurement by multiparametric magnetic resonance and transrect...
Martins,Tatiana; Mussi,Thais Caldara; Baroni,Ronaldo HuebABSTRACT Objective To assess accuracy of multiparametric magnetic resonance of the prostate to estimate gland volume, comparing the results with transrectal ultrasound and surgical specimen. Methods A retrospective study of 85 patients who underwent multiparametric magnetic resonance and transrectal ultrasound (for fusion image-guided biopsy) before radical prostatectomy. Prostate measurements were obtained fro...
A comparative study of ultrasound and cross-sectional imaging for detection of ...
Yamauchi,Fernando Ide; Paiva,Omir Antunes; Mussi,Thaís Caldara; Francisco Neto,Miguel José; Baroni,Ronaldo HuebABSTRACT Objective: To evaluate anatomic factors and radiologist's experience in the detection of solid renal masses on ultrasonography. Methods: We searched for solid renal masses diagnosed on cross-sectional imaging from 2007 to 2017 that also had previous ultrasonography from the past 6 months. The following features were evaluated: nodule size, laterality, location and growth pattern, patient body mass inde...
Penile emergencies: a review of the main conditions
Dantas,George Caldas; Cavalcante Jr.,Francisco; Yamauchi,Fernando Ide; Racy,Marcelo C. J.; Rahal Jr.,Antônio; Baroni,Ronaldo HuebAbstract Acute penile conditions, which typically have a traumatic, vascular, or infectious etiology, are rather uncommon and often require prompt medical evaluation. Penile emergencies can be treated conservatively or surgically, and their management often relies on the results of imaging examinations. Because of its high spatial resolution and wide availability, as well as the fact that it does not involve th...
Progression rate in Bosniak category IIF complex renal cysts
Tames,Amanda de Vasconcelos Chambi; Fonseca,Eduardo Kaiser Ururahy Nunes; Yamauchi,Fernando Ide; Arrais,Gabriela Maia Soares MessaggiAbstract Objective: To evaluate progression rate of Bosniak category IIF complex renal cysts and the malignancy rate among surgically resected cysts. Materials and Methods: We performed a database search for complex renal cysts classified as Bosniak category IIF on computed tomography or magnetic resonance imaging between January 2008 and April 2016. Follow-up examinations (computed tomography or magnetic reson...
Morphologic criteria of vermiform appendix on computed tomography and a possibl...
Tames,Amanda Chambi; Yamauchi,Fernando Ide; Castro,Adham do Amaral e; Amoedo,Caroline Duarte de Mello; Cardoso,Ellison Fernando; Baroni,Ronaldo HuebAbstract Objective: To evaluate the correlation of morphological criteria of the cecal appendix using computed tomography (CT) and the possible risk of developing acute appendicitis. Materials and Methods: Cases were defined as patients with surgically confirmed acute appendicitis who had undergone CT at least twice: at diagnosis and at least one month prior. Controls were defined as emergency patients with abd...
Common pitfalls in renal mass evaluation: a practical guide
Leão,Layra Ribeiro de Sousa; Mussi,Thais Caldara; Yamauchi,Fernando Ide; Baroni,Ronaldo HuebAbstract More than half of patients over 50 years of age have had at least one focal renal lesion detected as an incidental finding during an ultrasound, computed tomography, or magnetic resonance imaging examination. Although the majority of such lesions can be easily detected and correctly characterized, misdiagnoses may occur and are often related to methodological limitations, inappropriate imaging protocol...