42 research outputs found
Studio angiografico della vascolarizzazione della loggia mandibolare
No full textGiacché nella pratica chirurgica emerge inequivocabilmente una grande variabilità di dettagli anatomo-topografici nell'ambito della loggia sottomandibolare, come del resto in ogni distretto del corpo, agli autori è parso meritevole uno studio particolareggiato del decorso della arteria facciale con la tecnica dell'angiografia digitale. Da tale analisi sono chiaramente emerse frequenti variazioni anatomiche e decorsi normali
Endovascular Interventional Radiology of the Urogenital Tract
No full textInterventional radiology of the male urogenital system includes percutaneous and endovascular procedures, and these last consist mostly of transcatheter arterial embolizations. At the kidney level, arterial embolizations are performed mainly for palliative treatment of parenchymal tumors, for renal traumas and, less frequently, for arteriovenous fistulas and renal aneurysms and pseudoaneurysms. These latter may often require emergency intervention as they can cause renal or peri-renal hematomas or significant hematuria. Transcatheter arterial embolization is also an effective therapy for intractable severe bladder hematuria secondary to a number of neoplastic and inflammatory conditions in the pelvis, including unresectable bladder cancer and radiation-induced or cyclophosphamide-induced hemorrhagic cystitis. Endovascular interventional procedures for the penis are indicated for the treatment of post-traumatic priapism. In this article, we review the main endovascular radiological interventions of the male urogenital system, describing the technical aspects, results, and complications of each procedure at the various anatomical districts
claudicatio intermittens due to abdominal aortic aneurysms: imaging and endovascular treatment
No full textPerfusion CT in acute stroke: Effectiveness of automatically-generated colour maps
No full textOBJECTIVE:
To evaluate the accuracy of perfusion CT (pCT) in the definition of the infarcted core and the penumbra, comparing the data obtained from the evaluation of parametric maps [cerebral blood volume (CBV), cerebral blood flow (CBF) and mean transit time (MTT)] with software-generated colour maps.
METHODS:
A retrospective analysis was performed to identify patients with suspected acute ischaemic strokes and who had undergone unenhanced CT and pCT carried out within 4.5 h from the onset of the symptoms. A qualitative evaluation of the CBV, CBF and MTT maps was performed, followed by an analysis of the colour maps automatically generated by the software.
RESULTS:
26 patients were identified, but a direct CT follow-up was performed only on 19 patients after 24-48 h. In the qualitative analysis, 14 patients showed perfusion abnormalities. Specifically, 29 perfusion deficit areas were detected, of which 15 areas suggested the penumbra and the remaining 14 areas suggested the infarct. As for automatically software-generated maps, 12 patients showed perfusion abnormalities. 25 perfusion deficit areas were identified, 15 areas of which suggested the penumbra and the other 10 areas the infarct. The McNemar's test showed no statistically significant difference between the two methods of evaluation in highlighting infarcted areas proved later at CT follow-up.
CONCLUSION:
We demonstrated how pCT provides good diagnostic accuracy in the identification of acute ischaemic lesions. The limits of identification of the lesions mainly lie at the pons level and in the basal ganglia area. Qualitative analysis has proven to be more efficient in identification of perfusion lesions in comparison with software-generated maps. However, software-generated maps have proven to be very useful in the emergency setting. Advances in knowledge: The use of CT perfusion is requested in increasingly more patients in order to optimize the treatment, thanks also to the technological evolution of CT, which now allows a whole-brain study. The need for performing CT perfusion study also in the emergency setting could represent a problem for physicians who are not used to interpreting the parametric maps (CBV, MTT etc.). The software-generated maps could be of value in these settings, helping the less expert physician in the differentiation between different areas
Rene e vie urinarie (capitolo 8)
No full text• Supporto didattico alle rinnovate esigenze del corso di laurea per Tecnici di Radiologia Medica il cui percorso,
al passo con la dirompente evoluzione tecnologica della Diagnostica per Immagini, si è andato radicalmente
modificando nel corso degli ultimi anni.
• Il volume si suddivide in due parti: nella parte generale vengono esaminati i principi fisici
della risonanza magnetica e i parametri che contribuiscono alla formazione dell’immagine
e all’acquisizione delle sequenze, riservando comunque spazio anche alla semeiotica generale,
ai mezzi di contrasto e, in particolare, all’interpretazione e alla correzione degli artefatti;
la parte speciale comprende la trattazione dei diversi organi e apparati, privilegiando ovviamente gli aspetti
tecnico-metodologici e i quadri anatomici di normalità senza escludere comunque anche la descrizione
dei principali quadri patologici e degli elementi semeiologici essenziali a essi correlati
angioplastia iliaca intraoperatoria y revascularizacion distal:es un metod eficaz en el paciente de alto riesgo?
No full textLa rivascolarizzazione percutanea dell'arteriopatia periferica degli arti inferiori nel distretto femoro-popliteo: PTA e PTA più stent Risultati dopo sei anni di follow-up
No full textDual-energy CT of the brain: Comparison between DECT angiography-derived virtual unenhanced images and true unenhanced images in the detection of intracranial haemorrhage
No full textTo evaluate the diagnostic performance of virtual non-contrast (VNC) images in detecting intracranial haemorrhages (ICHs)
Renal stones composition in vivo determination: comparison between 100/Sn140 kV dual-energy CT and 120 kV single-energy CT
No full textThe objective of this study is to compare in vivo, the accuracy of single-energy CT (SECT) and dual-energy CT (DECT) in renal stone characterization. Retrospective study approved by the IRB. 30 patients with symptomatic urolithiasis who underwent CT on a second-generation dual-source scanner with a protocol that included low-dose 120 kV scan followed by 100/Sn140 kV dual-energy scan have been included. Stone composition was classified as uric acid, cystine or calcium oxalates, and phosphates according to attenuation values at 120 kV and to 100/Sn140 kV attenuation ratios and compared with the infrared spectroscopy analysis. 50 stones were detected in 30 patients. SECT correctly assessed stone composition in 52 % of the cases, DECT in 90 %. Sensitivity, specificity, positive predictive value, and negative predictive value in differentiating uric acid vs. non-uric acid stones were 0.94, 0.72, 0.64, and 0.96 for SECT and 1.00, 0.94, 1.00, and 0.96 for DECT, respectively. DECT significantly performs better than SECT in characterising renal stones in vivo, and may represent a useful tool for treatment planning
