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Exploring cork quality and density: a preliminary investigation employing computerized tomography
Publication . Pinheiro, João; Caldeira Lagem Abrantes, António Fernando; Brito, G.
Sample density was studied by placing an ROI (Region of Interest) to encompass as much usable material as possible in each sample, but not exceeding its limits, or to include the outer layer that is generally of no use (Table 1). The ROI was then evaluated using an average of the minimum to maximum density in the designated area of each of the samples, this process being carried out consistently in order to improve results and reduce measurement error.
Analysis of radiological examination request forms in a radiology department
Publication . Gonçalves, S. R.; Caldeira Lagem Abrantes, António Fernando; Ribeiro, Luís Pedro; do Espírito Santo Rodrigues, Sónia Isabel; Pinheiro, João; Magalhães Ribeiro, Anabela de; Almeida, R. P. P.
Clinical information in the Radiology department is an important tool to perform correct imaging studies, and adjust the exam to the anatomical region and clinical suspicion. Due to limited time and high workflow in diagnostic departments, immobilization devices, and communication barriers with patients, it may be difficult to identify the region under study, adjust the study to the patient's condition, and perform the scan properly.
Thus, the emergency room physicians and other medical referrals should provide as much information as possible so the radiographers, radiologists, and sonographers can perform the requested exam and clarify any clinical suspicion. Proper communication with clinicians before an examination is essential to provide patient-centered healthcare.
The present study aimed to evaluate the existence or absence of clinical information in the examination requests forms in a radiology department.
Anatomical regions and Body Mass Index: A Specific Absorption Rate (SAR) problem
Publication . Romão, C.; Caldeira Lagem Abrantes, António Fernando; Ribeiro, Luís Pedro; do Espírito Santo Rodrigues, Sónia Isabel; Pinheiro, João; Almeida, R. P. P.
The aim of this study is the analysis of SAR during MRI scans, and correlate them with gender, Body Mass Index, type of pulse sequence, acquisition time and the radiofrequencies applied on pulse sequences, and also the anatomic area.
Assessment of anatomical changes by pulmonary Angio-CT resulting from pulmonary thromboembolism
Publication . Costa, I.; Ribeiro, Luís Pedro; Caldeira Lagem Abrantes, António Fernando; do Espírito Santo Rodrigues, Sónia Isabel; Pinheiro, João; Azevedo, K. B.
PTE (Pulmonary Thromboembolism) is the third most common cause of cardiovascular death, with more than 600,000 cases per year in the US. This pathology has a wide spectrum of presentations and severity, with some patients experiencing shock, requiring urgent thrombolysis, while others can be safely treated on an outpatient basis with anticoagulation treatments alone (John, Marti Poletti, Perrier, 2014).
The degree of pulmonary arterial obstruction and the previous cardiorespiratory status determine the hemodynamic consequences of PTE, the elevation of pulmonary pressure is insignificant until the obstruction of the pulmonary arterial bed is greater than 30–50%, whereby above this threshold it increases rapidly, causing an elevation of pulmonary vascular resistance and consequently significant pulmonary hypertension with enlargement of the proximal arterial vessels, resulting in an afterload on the right ventricle and therefore its dilation. (Bryce, Perez-Johnston, Bryce, Homayoon, & Santos -Martin, 2019; John, et al., 2014).
The main objective is to assess the anatomical changes that may be present in patients diagnosed with PTE. In order to be able to reach the main objective of the work and answer the pre-defined research questions, there was a need to also define specific objectives, which consisted of analyzing which alterations were the most evidence of the presence of PTE; relate verifiable anatomical alterations through pulmonary Angio-CT with gender; relate verifiable anatomical alterations through pulmonary Angio-CT with age; to relate the curvature of the interventricular septum and the dilation of the right ventricle and also to relate the dilation of the pulmonary artery trunk and the dilation of the right ventricle.
Changes in bone mineral density in individuals with cerebral palsy
Publication . Viegas, M.; Ribeiro, Luís Pedro; Pinheiro, João; Vicente, B.; do Espírito Santo Rodrigues, Sónia Isabel; Caldeira Lagem Abrantes, António Fernando
According to Scheinberg, et al. (2015) citing Bianchi ML. (2013) Cerebral Palsy (CP) is one of the most prevalent diseases within those that affect bone mass, and is often related to other pathologies such as osteoporosis. According to António, D., H., et al, (2020) citing NIH, (2002); WHO, (2003) osteoporosis is a pathology that involves others and is defined by the deterioration of bone tissue. In this way, with the alterations caused in the bone tissue and with the reduced BMD values, the bones lose resistance to traumas, causing their fragility and, consequently, a greater probability of the occurrence of fractures. In this way, BMD measurement will help in the diagnosis of osteopenia/osteoporosis and in the prevention of future bone fractures. In addition to bone densitometry, there are other methods, less invasive and less expensive, that effectively analyze BMD. CP is characterized as a permanent, though not invariable, disturbance of movement and posture due to a non-progressive defect or lesion of the brain early in life. (Rosa, A.C.A. & Matos, M.R. (2017)) Depending on the area of the nervous system affected, the patient with CP presents neuromuscular alterations. Each change will compromise differently and to different degrees, affecting the functional performance of these patients.