Browsing by Author "Donato, Henrique"
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- Evaluation of the Mediastinum - Important Hints from the Chest RadiographPublication . Donato, Henrique; Pereira da Silva, FM; Candelaria, I; Oliveira, F; Caseiro-Alves, F
- Liver MRI: From basic protocol to advanced techniquesPublication . Donato, Henrique; França, M; Candelária, I; Caseiro-Alves, FLiver MR is a well-established modality with multiparametric capabilities. However, to take advantage of its full capacity, it is mandatory to master the technique and optimize imaging protocols, apply advanced imaging concepts and understand the use of different contrast media. Physiologic artefacts although inherent to upper abdominal studies can be minimized using triggering techniques and new strategies for motion control. For standardization, the liver MR protocol should include motion-resistant T2-w sequences, in-op phase GRE T1 and T2-w fast spin echo sequences with fat suppression. Diffusion-weighted imaging (DWI) is mandatory, especially for detection of sub-centimetre metastases. Contrast-enhanced MR is the cornerstone of liver MR, especially for lesion characterization. Although extracellular agents are the most extensively used contrast agents, hepatobiliary contrast media can provide an extra-layer of functional diagnostic information adding to the diagnostic value of liver MR. The use of high field strength (3T) increases SNR but is more challenging especially concerning artefact control. Quantitative MR belongs to the new and evolving field of radiomics where the use of emerging biomarkers such as perfusion or DWI can derive new information regarding disease detection, prognostication and evaluation of tumour response. This information can overcome some of the limitations of current tests, especially when using vascular disruptive agents for oncologic treatment assessment. MR is, today, a robust, mature, multiparametric imaging modality where clinical applications have greatly expanded from morphology to advanced imaging. This new concept should be acknowledged by all those involved in producing high quality, high-end liver MR studies.
- Main Abnormalities of the Videofluoroscopic Swallowing Study - a Valuable Technique in Swallowing DisordersPublication . Donato, Henrique; Pereira da Silva, FM; Oliveira, PB; Ilharco, J; Caseiro-Alves, F
- Peripheral nerve ultrasound – anatomy and technique for diagnosis and proceduresPublication . Mota, SJ; Pereira da Silva, FM; Gil-Pereira, M; Donato, Henrique; Donato, P; Caseiro-Alves, F
- Sinais em Radiologia TorácicaPublication . Donato, Henrique; Pereira da Silva, F; Antunes, C; Belo-Oliveira, P; Caseiro-Alves, F
- Symptomatic bilateral coronary artery fistula to pulmonary artery in elderly patientPublication . Pereira da Silva, F; Donato, P; Donato, Henrique; Jorge, E; Ferreira, MJ; Caseiro-Alves, FWe report the imaging findings of an uncommon coronary vascular termination anomaly, with fistula to the pulmonary artery. This 70 year old female patient presented unstable angina, showing a coronary artery fistula depicted in coronary angiogram from the left coronary to the pulmonary artery, with no significant atherosclerotic pathology. Due to development of ventricular tachycardia in stress echocardiogram examination, she was proposed for coronary fistula closure. Coronary CT was performed for procedure planning and allowed the identification of a second unsuspected fistula from the right coronary to the right pulmonary artery. Congenital coronary anomalies are a possible cause of symptomatic coronary pathology in patients of any age. In older patients, coronary artery fistulas are rare, especially when symptomatic. Adequately performed CT examinations, using its post processing capabilities, with 3D and MIP reconstructions are invaluable in delineating coronary anatomy, essential for further treatment planning.