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Browsing ESS4-Vários by Author "Abrantes, António"
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- Assessment of scatter radiation in the shielding of radiography proceduresPublication . Duarte, Maria; Rodrigues, Sónia; Ribeiro, Luís; Abrantes, António; Almeida, Rui; Azevedo, Kevin; Ribeiro, AnabelaScattered radiation is the largest contributor to patient dose and the main cause for stochastic effects (1-3). Evaluate the use of radiological protections and attenuating materials depending on the scattered radiation which the patient is subject, analyzing the appropriate placement of the protections is extremely important for the improvement of the radiographer clinical practice (4-7). Therefore, the purpose of this research is to ascertain the best way to protect irradiated patients, particularly children and pregnant women.
- Audit on the radiographers practice for CTPA performing in emergency departmentPublication . Miranda, Dulce; da Silva, Carlos Alberto; Mateus, B.; Almeida, Rui; Vicente, Bianca; Abrantes, António; Ribeiro, A. P.; Santos, P.; Carriço, B.ComputedTomography Pulmonary Angiography (CTPA) is a first line exam used to stratify the early risk of patients with Pulmonary embolism (PE) who is a common presentation to emergency department.The diagnosis of acute Pulmonary embolism (PE) is based on direct evidence of a thrombus in two projections, either as a filling defect or as amputation of a pulmonary arterial branch When performing CTPA, it is important for the radiographer to be aware of all aspects which can lead to an indeterminate CTPA or incorrect interpretation....
- Claustrophobia and Anxiety in Magnetic Resonance ImagingPublication . Lopes, Bruno; Azevedo, Kevin; Abrantes, António; Rodrigues, Sónia; Ribeiro, Luís; Vicente, Bianca; Almeida, RuiThe main goal of this research was to evaluate the anxiety and claustrophobia levels in patients undergoing Magnetic Resonance Imaging of the Head, Extremities and Breast. The specific objectives were: Understand if the anatomical region of the exam (Head, Extremities or Breast) influences the anxiety and claustrophobia levels Understand if prior MRI examinations influence the anxiety and claustrophobia levels Understand if age, gender and education status influences the anxiety and claustrophobia levels.
- Clinical audit and quality improvement of the imaging departmentsPublication . Almeida, Rui; Silva, Carlos Otero; Gama, Zenewton; Abrantes, AntónioDue to the nature of imaging departments, clinical audit, quality improvement and safety topics have specific components that are not observed in other services or departments, as they have the particularity of performing imaging procedures that involve the application of ionizing radiation, in most cases 1. Within the complexities of these procedures, the patient's inability to choose the best procedure stands out, leaving the healthcare professionals involved the responsibility to select the best patient-centred procedure, with the application of the most effective and efficient protocol depending on the patient clinical situation, based on the available evidence, and applying the lowest radiation dose possible. This poster intends to address a set of tools aiming to assess professional performance and encourage changes in the practices adopted, such as Clinical Audit, Evidence-based Practice and Guidelines, which can be integrated in a major concept of clinical governance as a system of measures and procedures to deliver the best care to the patient.
- Clinical diagnostic reference levels in computed tomography examinationsPublication . Marques, Raquel; Rodrigues, Sónia; Abrantes, António; Ribeiro, Luís; Azevedo, Kevin; Almeida, Rui; Vicente, B.For the accomplishment of this study, CT dose descriptors such as mAs, kVp, Computed Tomography Dose Index (CTDI) and Dose Length Product (DLP) were registered for CT examinations of the brain, face, chest, spine, abdomen and pelvis, through the examination of the file dose protocol grouped into 12 different clinical indications and using a sample of 20 patients per each clinical indication. A final total of 240 examinations were considered.
- Comparative dose measurements in dentomaxillofacial imaging procedures: are Barium and Bismuth shields useful for the protection of eyes and thyroid glands?Publication . Almeida, Rui; Abrantes, António; Silva, Carlos OteroDose measurements were performed at the eye lens and thyroid level using TLD dosimeters, in different configurations (with and without shields) and using standard protocols with different values of voltage (kV) and current-time product (mAs). A total of 103 exposures were performed on patients, 84 of them using a MSCT GE Lightspeed 16 equipment and the remaining 19 using a CBCT NewTom GiANO equipment. These exposures were subdivided into 22 smaller samples (19 samples with 5 exposures each, 1 sample with 4 exposures and 2 samples with 2 exposures each), in accordance with the protocols and configurations adopted. 54 were performed without the use of shields and the remaining 49 with the use of shields, namely, a bismuth shield for the thyroid, a barium shield for the eye lens and, also, a bismuth shield for the breast, which was tested only in the routine MSCT protocol.
- Effectiveness of shielding in computed tomography examinationsPublication . Coelho, Soraia; Azevedo, Kevin; Abrantes, António; Rodrigues, Sónia; Ribeiro, Luís; Vicente, Bianca; Almeida, Rui; Lesyuk, OksanaComputed Tomography (CT) is an important tool in providing high-quality crosssectional images of the body using ionizing radiation and computational reconstruction techniques. CT has transformed much of medical imaging by providing three-dimensional views of the organ or body region of interest. CT involves larger radiation doses than the more common, conventional x-ray imaging procedures, and technological developments have contributed to the increase of number and diversity of scanning procedures, in adults and pediatrics patients. Since an increasing number of CT scans are being obtained, the...
- Evaluation of the patient exposure dose during ERCP Fluoroscopy guided proceduresPublication . Granadas, Marisa; Rodrigues, Sónia; Sousa, Patrick; Lesyuk, Oksana; Vicente, Bianca; Almeida, Rui; Azevedo, Kevin; Ribeiro, Luís; Abrantes, AntónioEndoscopic retrograde cholangiopancreatography (ERCP) is a diagnostic/therapeutic fluoroscopy guided procedure that includes upper gastrointestinal endoscopy allowing the treatment of the bile and pancreatic ducts pathologies. Currently, ERCP is mostly used in therapy, which turns in to longer procedures, with potential higher doses of ionizing radiation to the patient and due to the cancer development risk it's relevant to evaluate dose exposure during ERCP. The International Atomic Energy Agency (IAEA) defined the mean dose area product (DAP) for ERCP diagnostic procedures as 15 Gy.cm2 and mean...
- Fat quantification using computerized tomographyPublication . Malveiro, Rita; Abrantes, António; Rodrigues, Sónia; Ribeiro, Luís; Azevedo, Kevin; Almeida, RuiThe purpose of this research was to quantify the volume of subcutaneous fat, visceral fat and intramuscular fat of patients that underwent computerized tomography examinations and relate this to age, gender, weight, height, waist circumference and body mass index.
- Implementing dose management systems in Radiology Departments: pros and consPublication . Vicente, Bianca; Almeida, Rui; Abrantes, António; da Silva, CarlosThe increasing use of radiodiagnostic modalities has led to an increased focus and awareness on patient safety and consequent search for optimization of radiographer’s practices 1. The Basic Safety and Standards Directive (BSSD), 2013/59/Euratom lays down standards for protection against the dangers arising from exposure to ionizing radiation2. This Directive was adopted by the Council of the European Union in 2013 and there was a requirement for transposition and implementation into national legislation in EU member state by February 2018. One of the key points...