126 research outputs found
PRaFULL: A method for the analysis of piled raft foundation under lateral load
No full textA new code, called PRaFULL (Piled Raft Foundation Under Lateral Load), was developed for the analysis of laterally loaded Combined Pile Raft Foundation (CPRF). The proposed code considers the contribution offered by the raft-soil contact and the interactions between all the CPRF system components. The nonlinear behaviour of the reinforced concrete pile and the soil are accounted. As shallower soil layers are of great relevance in the lateral response of a pile foundation, PRaFULL includes the possibility to consider layered soil profiles with appropriate properties. The shadowing effect on the ultimate soil pressure is accounted, when dealing with pile groups, as proposed by the Strain Wedge Model. PRaFULL BEM code obviously requires less computational resources compared to FEM (Finite Element Method) or FDM (Finite Difference Method) codes. The proposed code was validated in the linear elastic range by comparisons with the code APRAF (Analysis of Piled Raft Foundations). The reliability of the procedure to predict piled raft performance was then verified in nonlinear range by comparisons with both centrifuge tests and computer code PRAB
The role of computerized tomography in the diagnosis of postoperative intervertebral diskitis
No full textSix patients with diskitis following lumbar disk surgery were investigated by Computed Tomography (CT). Four patients underwent CT in a rather early phase of the disease (5-37 days after the onset of the symptoms): a posterior paravertebral fluid collection was always recognized, while the plain film was normal. Later on (2-4 months), the classical signs of diskitis were evident, with both CT and the plain film. The collection was always present at CT. A reintervention, performed on 3 patients, revealed the purulent content of the collections. It seems reasonable to suggest a relationship between the collection and the subsequent diskitis; the collection is probably an early sign of the disease. Its detection is of great value, because it could allow an immediate and adequate therapy. The authors stress the usefulness of performing CT in an early phase on this kind of symptomatic patients
The Role of CEUS in the Characterization of Hepatocellular Nodules Detected During the US Surveillance Program – Current Practices in Europe
No full textThe basic pathological feature for the differential
diagnosis between hepatocellular carcinoma
(HCC) and non-malignant hepatocellular nodules
in cirrhotic patients detected during ultrasound
(US) is the vascular supply to the nodule. Computed
tomography (CT) and magnetic resonance
imaging (MRI) are considered reference imaging
techniques for depicting hepatocellular nodule
vascularity in the noninvasive diagnosis of HCC.
Contrast-enhanced US (CEUS) improves the diagnostic
performance of unenhanced US in the diagnosis
of HCC, giving an overall diagnostic accuracy
that is similar to that of CT, even for nodules smaller
than 2 cm. An additional diagnostic feature of
CEUS relative to CT is the possibility to visualize
contrast wash-in to hepatic nodules during the
arterial phase and contrast washout during the
portal venous and late phases. Sensitivity for the
diagnosis of HCC with combined assessment of
CEUS and CT is higher than for separate assessments
of CEUS and CT due to the reduction of
false-negative findings. CEUS represents a competitive
imaging method from an economic point of
view, and is an effective imaging tool for assessing
the therapeutic outcome after surgery, ablation
therapy, and transarterial chemoembolization
(TACE)
La fibrinolisi loco-regionale nel trattamento delle occlusioni dei by-pass degli arti inferiori: nostra esperienza
No full textImpatto clinico-diagnostico dell’ecocontrastografia nelle lesioni epatiche e valutazione dei costi
No full textDefinizione e realizzazione di un archivio informatico per dati radiologici di interesse scientifico.
No full text
Tomografia Computerizzata ad alta risoluzione e tomografia pluridirezionale nella valutazione dei colesteatomi dell’orecchio medio
No full text
Growth hormone secretory pattern and response to treatment in children with short stature followed to adult height.
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