Guilherme Watte

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OBJECTIVE To determine whether air trapping (expressed as the percentage of air trapping relative to total lung volume [AT%]) correlates with clinical and functional parameters in children with obliterative bronchiolitis (OB). METHODS CT scans of 19 children with OB were post-processed for AT% quantification with the use of a fixed threshold of -950 HU(More)
To estimate the diagnostic accuracy of signal intensity of the lesion-to-spinal cord ratio (LSR) and apparent diffusion coefficient (ADC) in diffusion-weighted (DW) magnetic resonance imaging of pulmonary nodules suspicious for lung cancer in granulomatous lung disease-endemic regions. Forty-nine patients with indeterminate solitary pulmonary nodules(More)
We evaluated the diagnostic value for pulmonary embolism (PE) of the True fast imaging with steady-state precession (TrueFISP) MRI, a method that allows the visualization of pulmonary vasculature without breath holding or intravenous contrast. This is a prospective investigation including 93 patients with suspected PE. All patients underwent TrueFISP MRI(More)
Postoperative esophageal strictures frequently recur. We assessed the efficacy of injecting triamcinolone after bougie dilation in comparison to dilation alone. In a double-blind randomized fashion, 19 patients (68 % male with mean age of 53-years old) with non-dilated esophagogastric complex strictures after esophagectomy with gastric pull-up were assigned(More)
PURPOSE The aim of the study was to determine the accuracy of multidetector computed tomography in the evaluation of histologically confirmed pulmonary hamartomas (PHs), with a special focus on fat detection. MATERIALS AND METHODS Data from 55 patients who had received a histologically confirmed diagnosis of PH and had undergone 64-slice thoracic MDCT(More)
PURPOSE To evaluate the efficacy and safety of hypofractionated radiotherapy (16 Gy in 2 fractions, 1 week apart) in patients with complicated bone metastases and poor performance status. METHODS A prospective single-arm phase II clinical trial was conducted from July 2014 to May 2016. The primary endpoint was pain response as defined in the International(More)
OBJECTIVE To examine the variation in the rates of psychiatric hospitalization and the mean hospital stay time in the public health system in the state of Rio Grande do Sul, in the south of Brazil, from 2000 to 2011. METHODS This was an ecological study. Data were collected from DATASUS. The rates were obtained from diagnosis of admissions due to(More)
Dear Editor, We thank Drs. Shen and Kuang [1] for their interest in our recent publication in European Radiology [2]. The aim of our study was to estimate the diagnostic accuracy of signal intensity of the lesion-to-spinal cord ratio (LSR) and apparent diffusion coefficient (ADC) in diffusion-weighted magnetic resonance imaging (DWI) of pulmonary nodules(More)
AIM To evaluate the diagnostic performance of ultra-low-dose computed tomography (ULDCT) in comparison to standard coronary calcium score (CCS) acquisition for the evaluation of coronary artery calcification (CAC). MATERIALS AND METHODS Standard CCS acquisition and ULDCT were performed in patients referred for coronary CT angiography for the evaluation of(More)
OBJECTIVE To evaluate the changes in lung function in the first year after single lung transplantation in patients with idiopathic pulmonary fibrosis (IPF). METHODS We retrospectively evaluated patients with IPF who underwent single lung transplantation between January of 2006 and December of 2012, reviewing the changes in the lung function occurring(More)