Encontrados 7 documentos, a visualizar página 1 de 1
Usefulness of Perfusion CT to Assess Response to Neoadjuvant Combined Chemoradi...
Curvo-Semedo, L; Portilha, A; Ruivo, C; Borrego, M; Leite, JS; Caseiro-Alves, FRATIONALE AND OBJECTIVES: To prospectively evaluate perfusion computed tomography (CT) for assessment of changes in tumor vascularity after chemoradiation therapy (CRT) in locally advanced rectal cancer and to analyze the correlation between baseline perfusion parameters and tumor response. MATERIALS AND METHODS: Twenty patients with rectal cancer underwent baseline perfusion CT before CRT, and in 11 an examin...
Tumour ADC measurements in rectal cancer: effect of ROI methods on ADC values a...
Lambregts, DM; Beets, GL; Maas, M; Curvo-Semedo, L; Kessels, AG; Thywissen, T; Beets-Tan, RGOBJECTIVES: To assess the influence of region of interest (ROI) size and positioning on tumour ADC measurements and interobserver variability in patients with locally advanced rectal cancer (LARC). METHODS: Forty-six LARC patients were retrospectively included. Patients underwent MRI including DWI (b0,500,1000) before and 6-8 weeks after chemoradiation (CRT). Two readers measured mean tumour ADCs (pre- and pos...
The hypointense liver lesion on T2-weighted MR images and what it means
Curvo-Semedo, L; Brito, JB; Seco, MF; Costa, JM; Marques, CB; Caseiro-Alves, FThe vast majority of focal liver lesions are hyperintense on T2-weighted magnetic resonance (MR) images. Rarely, however, hepatic nodules may appear totally or partially hypointense on those images. Causes for this uncommon appearance include deposition of iron, calcium, or copper and are related to the presence of blood degradation products, macromolecules, coagulative necrosis, and other conditions. Although ...
Sigmoid colon perforation at CT colonography secondary to a possible obstructiv...
Belo-Oliveira, P; Curvo-Semedo, L; Rodrigues, H; Belo-Soares, P; Caseiro-Alves, FWe report a case of colonic perforation in CT colonography, which was observed in a sigmoid colon segment contained within an inguinal hernia. At surgery, apart from the perforation, a normal large-bowel wall was found. Although rare, perforation may occur in patients with normal bowel wall, possibly resulting from a mechanical strain caused by gaseous overdistention. Radiologists performing the procedure must ...
USPIO-enhanced magnetic resonance imaging for nodal staging in patients with he...
Curvo-Semedo, L; Diniz, M; Miguéis, J; Julião, MJ; Martins, P; Pinto, A; Caseiro-Alves, FPURPOSE: To determine the accuracy of ultrasmall superparamagnetic iron oxide (USPIO)-enhanced magnetic resonance imaging (MRI) for nodal staging in patients with head and neck cancer. MATERIALS AND METHODS: Twenty patients with carcinomas of the upper aerodigestive tract were prospectively enrolled. MRI was performed before and 24-36 hours after intravenous infusion of an USPIO agent, ferumoxtran-10 (Sinerem; ...
Soft-tissue foreign body (cactus thorn)
Brito, J; Neves, S; Curvo-Semedo, L; Caseiro-Alves, FA 52-year-old woman complained of pain, swelling and functional impairment on the second digit of the hand 6 weeks after she punctured the finger with a cactus thorn.
Tuberculosis of the chest
Curvo-Semedo, L; Teixeira, L; Caseiro-Alves, FThe relationship between tuberculosis and mankind has been known for many centuries, with the disease being one of the major causes of illness and death. During the early 1980s, there was a widespread belief that the disease was being controlled, but by the mid-1980s, the number of cases increased. This change in the epidemiological picture has several causes, of which the AIDS epidemic, the progression of pove...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||