Search results for "tomography"
showing 10 items of 2332 documents
Computational analysis to predict false-lumen perfusion and outcome of type B aortic dissection.
2014
We have attempted to identify potential predictors foracute and late aortic events starting from admission computed tomographic images.
Haemoptysis: a frequent diagnostic challenge
2015
We appreciate and agree with the comments of M. Mondoni and colleagues, that the results of the ongoing prospective Italian multicentre trial ([www.ClinicalTrial.gov][1] identifier [NCT02045394][2]) will be of considerable interest for the management of haemoptysis, a frequent and severe symptom, especially since there is no clear consensus concerning aetiology and treatment. Interestingly, beyond determining the prevalence of diseases that may present with haemoptysis, their epidemiological results will be analysed according to the severity of the symptom. More importantly, their trial will hopefully make it possible to analyse the sensitivity and specificity of complementary tests, such a…
The impact of SARS-COV2 pandemic on the management oF IPF patients: Our narrative experience
2021
Abstract Background The SARS-CoV-2 pandemic has changed the health-care systems around the world in a remarkable way. We describe the strategies adopted to cope with the limitations imposed by the pandemic to the access to health care by patients diagnosed with idiopathic Pulmonary Fibrosis (IPF). Material and methods We conducted a retrospective observational analysis including IPF patients under antifibrotic drugs (nintedanib and pirfenidone) that accessed to the Outpatient clinic of the University of Palermo, Italy. Patients received a phone number and an email address in case of any urgency and a virtual meeting was settled up monthly. Results 40 patients (M/F: 30/10) were followed up, …
Assessing and accessing the small airways; implications for asthma management
2013
Despite the wealth of experience in the management of asthma, the disease remains inadequately controlled in some patients, who face long-term respiratory impairment and disability. The disease has been characterised as an inflammatory condition affecting first the larger airways and eventually the smaller airways, but there is evidence that peripheral airway involvement defines a particular and more severe phenotype of asthma. For this reason, assessing functional and biological parameters reflective of small airways involvement is important prognostically. No assessment method is universally and directly representative of peripheral airway function, but the traditional spirometric tests, …
Congenital pulmonary airway malformation in adult: report of two rare cases and literature review
2019
Congenital pulmonary airway malformations (CPAMs) are a heterogeneous group of congenital, non-hereditary lesions of the lung, cystic and non-cystic type with clear developmental anomalies and evident malformative changes, which derive from the excessive proliferation of the tubular bronchial structures. We described two rare cases of type IV CPAM detected in adult patients with different clinical presentation: one of these cases was symptomatic, complaining of cough and hemoptysis. Conversely, the other case was reported as incidental findings in patient with abdominal pain without respiratory symptoms. Chest computed tomography (CT) scan was performed showing voluminous cystic formations …
Mechanostructural adaptations preceding postpneumonectomy lung growth
2012
In many species, pneumonectomy results in compensatory growth in the remaining lung. Although the late mechanical consequences of murine pneumonectomy are known, little is known about the anatomic adaptations and respiratory mechanics during compensatory lung growth. To investigate the structural and mechanical changes during compensatory growth, mice were studied for 21 days after left pneumonectomy using microCT and respiratory system impedance (FlexiVent). Anatomic changes after left pneumonectomy included minimal mediastinal shift or chestwall remodeling, but significant displacement of the heart and cardiac lobe. Mean displacement of the cardiac lobe centroid was 5.2 ± 0.8 mm. Lung imp…
Publisher Correction: X-Ray Nanotomography of Individual Pulp Fibre Bonds Reveals the Effect of Wall Thickness on Contact Area
2020
Fibre bonds play an essential role in various properties of paper. Much research has focused on their strength, but the determination of the actual contact area also provides a challenge. Many of the research methods rely on optical tools, which are restricted by the wavelength of light that is utilised. Novel X-ray computed tomography devices utilise X-rays in studying the inner structure of materials, and surpass the optical methods in terms of resolution, allowing detection of even smaller details and variations in distance between the fibres in the bond intersection area. X-ray nanotomography was used to image 26 individual cellulose fibre bonds made of springwood and summerwood fibres …
A Tomographical Characterization of L-convex Polyominoes
2005
Our main purpose is to characterize the class of L-convex polyominoes introduced in [3] by means of their horizontal and vertical projections. The achieved results allow an answer to one of the most relevant questions in tomography i.e. the uniqueness of discrete sets, with respect to their horizontal and vertical projections. In this paper, by giving a characterization of L-convex polyominoes, we investigate the connection between uniqueness property and unimodality of vectors of horizontal and vertical projections. In the last section we consider the continuum environment; we extend the definition of L-convex set, and we obtain some results analogous to those for the discrete case.
Synthesis of 2-amino-6-(2-[18F]fluoro-pyridine-4-ylmethoxy)-9-(octyl-β-d-glucosyl)-purine: a novel radioligand for positron emission tomography studi…
2002
Abstract The synthesis of the novel glucose conjugated O6-methylguanine-DNA methyltransferase (MGMT) inhibitor 2-amino-6-(2-[18F]fluoro-pyridine-4-ylmethoxy)-9-(octyl-α- d -glucosyl)-purine is reported. This compound might serve as a radiotracer for the determination of the MGMT status of tumour tissue.