Publications by authors named "N M B Barreto"
This article presents 582 bone scan images from 291 adult patients who attended the Nuclear Medicine Service at the Instituto de Investigaciones en Ciencias de la Salud (IICS) of the Universidad Nacional de Asunción (UNA), Paraguay, between 2020 and 2024. The images were acquired using trimodal SPECT-CT-PET equipment, model AnyScan SCP, and the MEDISO brand. Approximately 20 mCi of technetium-99m methylene diphosphonate (Tc-MDP) was administered to each patient, producing whole-body planar images in anterior and posterior projections of the axial and appendicular skeleton with a resolution of 256 × 1024 pixels.
View Article and Find Full Text PDFIntroduction: Abdominal and perineal repairs for rectal prolapse are offered to patients based on surgeon assessment of risk. Interpretations of risk can vary. We sought to understand how the preoperative Risk Analysis Index (RAI) score, a validated measure of frailty, aligned with our existing decision-making process for rectal prolapse repair.
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- The study focused on identifying key immune molecules for diagnosing S. stercoralis infections using serum samples tested with specific antigens (AgS and AgM).
- Results from IgG-ELISA showed decent sensitivity (82.3 to 85.3%) and varying specificity (60.0 to 93.3%), but some cross-reactivity with other helminth infections was noted.
- A specific 140 kDa protein from AgS demonstrated perfect sensitivity and specificity without cross-reactivity, indicating its potential for creating reliable immunodiagnostic tests for strongyloidiasis.
This article presents a dataset containing 641 images of Thyroid Gammagraphies studies corresponding to 235 patients over 18 years of age that were acquired in the period from 2016 to 2024 at the Nuclear Medicine Service of the of the (IICS - UNA), Paraguay. First, the Thyroid Gammagraphies images were acquired according to the acquisition protocol described in this article. The thyroid scintigraphies images were acquired using trimodal SPECT-CT-PET equipment, model AnyScan SCP, MEDISO brand.
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- Oxidative stress significantly impacts various diseases, and this study presents a new model using hydrogen peroxide-induced stress in Galleria mellonella larvae as a cost-effective and ethical research alternative.
- The model serves as a bridge between in vitro and in vivo studies and helps identify important biomarkers related to oxidative stress, including lipid peroxidation and antioxidant enzyme activities.
- Results indicate that while G. mellonella larvae can tolerate high hydrogen peroxide doses initially, prolonged exposure leads to increased damage and reduced survival due to inadequate antioxidant defenses.