186,499 research outputs found
O espaço e as formas
No full textThe work of Adalberto Dias, considered in its
time span and the extraordinary variety
of project opportunities and themes
that it crosses, gives us the idea of a route
very coherent, where each advance testifies to the
construction of a process of interpretation of the
reality capable of exploring with extreme refinement
the plurality of expressions it finds. Each
project is configured, even before being
the definite and determined proposal, as a
true exploration aimed at establishing the
rules underlying the choices. Far from
the notion of canon and alien to the application of models
pre-established, the practice of the project is based on a
refined exercise of reading and interpreting the place,
that finds its main medium in drawing, a
true instrument of appropriation of reality.
The sketch is a fundamental element of the project
of drawing; as Dias says, “Everything begins
with a line”, a line that initially flows
freely and multiplies, joining other
lines, drawing an arabesque of hypotheses
and senses, outlining shapes, chasing
meanings, questioning and forcing reality,
modifying the initial intentions according to the
local, outlining ideas and then verifying them with
the rigor of the technical instruments of representation.
A true moment of project conception,
the sketch is capable of suggesting a new order of
the reality, making explicit and reinforcing the complexity
and the meanings of the place. The route is highly
experimental and the words of Dias, “I still do
as I saw it done and how I learned it”, clearly echo
those of Alexandre Alves Costa, the famous exponent of
Escola do Porto: “We always learn to project,
projecting”
Preoperative assessment of nonfunctioning pancreatic endocrine tumours: role of MDCT and MRI
No full textPURPOSE:
This study was done to compare the diagnostic accuracy of multidetector computed tomography (MDCT) and magnetic resonance imaging (MRI) in the preoperative assessment of nonfunctioning pancreatic endocrine tumours (NFPET).
MATERIALS AND METHODS:
Fifty-one patients (25 men, 26 women; mean age, 52 years), preoperatively investigated by both MDCT and MRI and subsequently operated on with a histological diagnosis of NFPET, were included in this study. MDCT and MRI accuracy in evaluating location, size, margins, baseline density/signal intensity, structure, pattern of enhancement, peak enhancement phase, involvement of main pancreatic duct, involvement of adjacent organs, infiltration of peritumoural vessels, involvement of locoregional lymph nodes, and liver metastases was compared using Pearson correlation, Mann-Whitney and chi-square tests. A value of p<0.05 was considered statistically significant.
RESULTS:
MDCT and MRI had similar accuracy in assessing size, margins, baseline density/signal intensity, structure, pattern of enhancement, peak enhancement phase, involvement of main pancreatic duct, involvement of adjacent organs, involvement of locoregional lymph nodes, and liver metastases (p>0.05). MDCT was superior to MRI in evaluating the infiltration of peritumoural vessels (p=0.025).
CONCLUSIONS:
MDCT performed better than MRI in assessing vascular involvement and should be considered the best imaging tool for preoperative evaluation of NFPET
L’elaborazione e il riconoscimento dell’immagine radiografica con il calcolatore: esperienze personali
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