Miguel Ramalho

ORCID: 0000-0003-2522-1670
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About
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Research Areas
  • Advanced MRI Techniques and Applications
  • Lanthanide and Transition Metal Complexes
  • MRI in cancer diagnosis
  • Hepatocellular Carcinoma Treatment and Prognosis
  • Medical Imaging Techniques and Applications
  • Liver Disease Diagnosis and Treatment
  • Radiation Dose and Imaging
  • Pancreatitis Pathology and Treatment
  • Cholangiocarcinoma and Gallbladder Cancer Studies
  • Liver Disease and Transplantation
  • Radiomics and Machine Learning in Medical Imaging
  • Atomic and Subatomic Physics Research
  • Adrenal and Paraganglionic Tumors
  • Genetic and Kidney Cyst Diseases
  • Radioactive element chemistry and processing
  • Medical Imaging and Pathology Studies
  • Gallbladder and Bile Duct Disorders
  • Radiology practices and education
  • Gastrointestinal disorders and treatments
  • Appendicitis Diagnosis and Management
  • Ultrasound in Clinical Applications
  • Pancreatic and Hepatic Oncology Research
  • Trauma Management and Diagnosis
  • Renal cell carcinoma treatment
  • Advanced Neuroimaging Techniques and Applications

Hospital da Luz
2018-2025

Hospital Garcia de Orta
2015-2024

Universidade Estadual Paulista (Unesp)
2024

University of North Carolina at Chapel Hill
2009-2018

Centro Hospitalar de Lisboa Central
2017

University of North Carolina Hospitals
2011-2016

Siemens (United States)
2011

Weatherford College
2007

To determine if a correlation exists between the number of previous enhanced magnetic resonance (MR) imaging examinations and high signal intensity in globus pallidus (GP) dentate nucleus (DN) patients who received gadodiamide (Omniscan), linear nonionic gadolinium-based contrast agent, those gadobenate dimeglumine (MultiHance), ionic agent.Institutional review board approval was obtained for this single-center retrospective study, with waiver informed consent. The study population included...

10.1148/radiol.2015150872 article EN Radiology 2015-06-16

The literature informs us that gadolinium can cause health issues. At least four major disorders, including the two well-recognized nephrogenic systemic fibrosis and severe acute adverse event, have been identified.We propose naming histopathologically proven presence of in brain tissue "gadolinium storage condition," we describe a new entity represents symptomatic deposition individuals with normal renal function, for which designation disease."

10.2214/ajr.15.15842 article EN American Journal of Roentgenology 2016-05-25

The purposes of this study were to evaluate the feasibility a free-breathing 3D gradient-recalled echo sequence with radial data sampling (radial GRE) in abdominal MRI compared standard GRE volumetric interpolated breath-hold examination (VIBE) for imaging cooperative patients and perform preliminary assessment noncooperative patients.Fifty-five consecutively registered who underwent unenhanced contrast-enhanced technique constituted population. Two readers independently blindly evaluated...

10.2214/ajr.10.5881 article EN American Journal of Roentgenology 2011-08-23

Objective The aim of this study was to examine and report 4 patients who developed symptomatology shortly after gadolinium-based contrast agent (GBCA) administration. Materials Methods History taking targeted physical examination were performed on subjects reported development new disease features within hours weeks having received an intravenous administration GBCA. Results Two assessed at 2 months (patient P2mo) 3 P3mo) GBCA (early stage), 7 years P7yr) 8 P8yr) (late stage). Clinical...

10.1097/rli.0000000000000318 article EN Investigative Radiology 2016-08-19

To describe the magnetic resonance imaging (MRI) appearance of hepatic combined hepatocellular-cholangiocarcinoma (cHCC-CC) in 11 patients.The database Department Pathology was cross-referenced with MRI to identify patients confirmed cHCC-CC who had undergone MRI. Eleven consecutive were included (seven female, mean age 57.6 years). All Caucasian. Five a clinical history chronic liver disease. Two radiologists retrospectively analyzed images consensus.cHCC-CC single mass 10/11 patients....

10.1002/jmri.23754 article EN Journal of Magnetic Resonance Imaging 2012-07-10

<h3>BACKGROUND AND PURPOSE:</h3> Different T1-weighted sequences have been used for qualitative and quantitative evaluation of T1 signal intensity related to gadolinium deposition in the dentate nucleus patients who underwent several enhanced MR imaging studies. Our purpose was perform an intraindividual comparison between spin-echo 3D magnetization-prepared rapid acquisition gradient echo had multiple exposures gadodiamide. <h3>MATERIALS METHODS:</h3> retrospectively selected population...

10.3174/ajnr.a4757 article EN cc-by American Journal of Neuroradiology 2016-03-31

The purpose of this study was to retrospectively evaluate early dynamic serial gadolinium-enhanced and chemical-shift imaging (CSI) MRI distinguish benign from malignant adrenal tumors.Between July 2007 December 2011, 205 patients with 239 lesions (177 adenomas, 54 metastases, 5 pheochromocytomas, 3 cortical carcinomas) underwent CSI. CSI assessed qualitatively by calculating the index, enhancement patterns were evaluated quantitatively. Statistical analyses performed.Most adenomas exhibited...

10.2214/ajr.13.11731 article EN American Journal of Roentgenology 2014-06-21

The aim of this study was to report the use intravenous calcium (Ca)-/zinc (Zn)-diethylene triamine penta-acetic acid (DTPA) for treatment 25 symptomatic patients diagnosed with gadolinium deposition disease (GDD).Written informed consent obtained. Twenty-five (18 women; mean age, 46.8 ± 15.3 years) a diagnosis GDD were included. All had received at least 1 administration (Gd)-based contrast agent. Patients 3 sessions Ca-/Zn-DTPA, 15 treatments spaced month apart, and 10 week apart. In all...

10.1097/rli.0000000000000453 article EN Investigative Radiology 2018-02-07

Objectives The aim of this study was to summarize the current preclinical and clinical evidence on association between exposure gadolinium (Gd) compounds skin toxicity in a setting similar practice. Materials Methods A search MEDLINE PubMed references from January 2000 December 2022 performed using keywords related deposition its effects skin, such as “gadolinium,” “gadolinium-based contrast agents,” “skin,” “deposition,” “toxicity.” In addition, cross-referencing added when appropriate. For...

10.1097/rli.0000000000000973 article EN Investigative Radiology 2023-04-24

Purpose: To document additional findings in the Splanchnic System patients with hepatosteatosis on clinical MR studies. Materials and Methods: One hundred randomly selected studies of who underwent during a six-month interval were included. Clinical information current requisition prior abdominal within one year was recorded. No research or investigation into medical records performed. Statistical analyses Results: Among 100 hepatosteatosis, there 59 Females (mean 52.6 years). The presenting...

10.15406/ghoa.2024.15.00570 article EN Gastroenterology & Hepatology Open Access 2024-02-16

Objetivo: comparar a terapêutica ofertada aos pacientes que evoluíram óbito foram submetidos cuidados paliativos e aqueles estavam sob com objetivo de cura. Metodologia: Estudo retrospectivo, quantitativo, utilizando prontuários da Santa Casa Caridade Diamantina (SCCD), evoluiram 01 janeiro 31 dezembro 2020. Resultados: Os resultados mostraram o tempo médio internação foi 7,39 dias, maioria dos tinha acometimento cardíacos respiratórios como causa principal internação. Cuidados indicados...

10.55905/revconv.18n.3-068 article PT cc-by-nc Contribuciones a las Ciencias Sociales 2025-03-10

Adrenal lesions are common findings in abdominal imaging, with adrenal adenomas being the most frequent type. Accurate detection of is essential to avoid unnecessary diagnostic procedures and treatments. However, conventional imaging-based evaluation relies heavily on expertise radiologists can be complicated by pseudo-lesions, overlapping imaging features, suboptimal techniques. To address these challenges, we propose an end-to-end machine learning pipeline that integrates deep...

10.3390/app15084100 article EN cc-by Applied Sciences 2025-04-08
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