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  • Liver neoplasms  (3)
  • Ultrasound  (2)
  • 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Long-term results of percutaneous ethanol injection therapy for hepatocellular carcinoma in cirrhosis: a European experience (1997)
    Springer
    European radiology 7 (1997), S. 514-519 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Alcohol ; Liver neoplasms ; Therapy ; Interventional procedure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The objective of our work was to evaluate the long-term results of percutaneous ethanol injection (PEI) for the treatment of hepatocellular carcinoma (HCC) in patients with liver cirrhosis. A total of 184 cirrhotic patients with HCC underwent PEI as the only anticancer treatment over an 8-year period. Patients were followed after therapy by means of clinical examinations, laboratory tests, and US and CT studies performed at regular time intervals. Survival rates were determined according to the Kaplan-Meier method. The overall survival was 67 % at 3 years, 41 % at 5 years, and 19 % at 7 years. The 3-, 5-, and 7-year survival rates of patients with single HCC ≤ 3 cm (78, 54, and 28 %, respectively) were significantly higher (p 〈 0.01) than those of patients with single HCC of 3.1–5 cm (61, 32, and 16, respectively) or multiple HCCs (51, 21, and 0 %, respectively). Survival of Child-Pugh A patients (79 % at 3 years, 53 % at 5 years, and 32 % at 7 years) was significantly longer (p 〈 0.01) than that of Child-Pugh B patients (50 % at 3 years, 28 % at 5 years, and 8 % at 7 years). A selected group of 70 patients with Child-Pugh A cirrhosis and single HCC ≤ 3 cm had a 7-year survival of 42 %. Long-term survival of cirrhotic patients with HCC treated with PEI is comparable to that reported in published series of matched patients submitted to surgical resection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050194
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Inflammatory aneurysm of the abdominal aorta: role of ultrasonography (1993)
    Springer
    European radiology 3 (1993), S. 333-336 
    Details
    ISSN: 1432-1084
    Keywords: Aneurysm ; Aorta ; Inflammatory aneurysm ; Ultrasound
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract During a 5-year period 229 aneurysms of the abdominal aorta were identified by ultrasonography (US) and subsequently submitted to CT. Of these, 41 were seen to be of the inflammatory type on the grounds of the CT scans, confirmed in 29 cases by surgical findings. The patients were 38 men and 3 women, mean age 64.9 years. US, performed using both 3.5 and 5 MHz probes, revealed the inflammatory nature of the aneurysm in 33 of 41 cases (80.5%). In the remaining cases a correct diagnosis could not be determined because of obesity and/or the distal location of the lesion. Regarding the complications associated with the inflammatory nature of the aneurysm (considered only in those cases submitted to surgery) US revealed a good diagnostic accuracy for ureteral involvement (7/7 cases detected, no false positives). Caval involvement was also correctly identified in 6 of 8 cases, although overestimated in 3 of 21. Both of these complications were correctly detected by CT in all cases. Neither US nor CT furnished reliable signs regarding duodenal and colonic involvement (surgically proven in 4 of 29 cases). US proved effective in detecting the inflammatory nature of the aneurysm. If surgery is considered, CT seems mandatory for a correct assessment of the complications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00167463
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Differentiation of hepatocellular adenoma and focal nodular hyperplasia of the liver: comparison of power Doppler imaging and conventional color Doppler sonography (1997)
    Springer
    European radiology 7 (1997), S. 1410-1415 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Liver ; focal nodular hyperplasia ; Liver neoplasms ; diagnosis ; US ; Ultrasound ; Doppler studies ; power Doppler studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of our study was to compare the diagnostic efficacy of power Doppler imaging and conventional color Doppler sonography for differentiating between hepatocellular adenoma (HCA) and focal nodular hyperplasia (FNH) of the liver. Thirty-one focal liver lesions (in 29 patients) with histologic proof of HCA (n = 9) or FNH (n = 22) were studied with power and color Doppler sonography according to a standardized examination protocol. The size of the lesions ranged between 1.5 and 14.5 cm (HCA, 3.5–14.5 cm, mean ± SD 7.3 ± 3.3 cm; FNH, 1.5–9.1 cm, mean ± SD 5.1 ± 2.1 cm). Intratumoral vessels with a venous Doppler spectrum, associated with either pulsatile or continuous peripheral flow, were detected in HCA (eight of nine lesions by power Doppler imaging and six of nine by color Doppler imaging) but not in FNH. In contrast, color signals with an arterial Doppler spectrum, radiating from the center to the periphery of the lesion, were depicted in FNH (20 of 22 cases by power Doppler imaging and 15 of 22 by color Doppler sonography) but not in HCA. Differentiation of HCA and FNH was achieved in 28 of 31 cases (90 %) by power Doppler imaging and in 21 of 31 (68 %) by color Doppler sonography (p 〈 0.01). Power Doppler imaging is superior to conventional color Doppler sonography in the depiction of the intratumoral flow characteristics of HCA and FNH, and enables a more accurate differential diagnosis than color Doppler sonography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050308
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  • 4
    Electronic Resource
    Electronic Resource
    Combined transcatheter arterial chemoembolization and percutaneous ethanol injection for the treatment of large hepatocellular carcinoma: local therapeutic effect and long-term survival rate (1998)
    Springer
    European radiology 8 (1998), S. 439-444 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Alcohol ; Liver neoplasms ; Liver neoplasms ; therapy ; Liver ; interventional procedure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of our study was to investigate local therapeutic effects and long-term results of combined transcatheter arterial chemoembolization (TACE) and percutaneous ethanol injection (PEI) in the treatment of large hepatocellular carcinoma (HCC). Eight-six patients (67 males and 19 females, age range 48–75 years, mean age 65.1 years) with Child-Pugh class A (n = 48) or B (n = 38) liver cirrhosis and a large HCC (main tumor 3.1–8 cm in diameter with no more than two daughter nodules) were enrolled in a prospective study. All patients underwent a single TACE session followed by PEI. Follow-up ranged from 4 to 65 months (mean 27.8 months, median 26 months). No major complication occurred. The local therapeutic effect, as assessed on the basis of findings at CT and MR imaging, was complete response in 71 of 86 patients (82 %) and partial response in 15 of 86. Overall survival rates by the Kaplan-Meier method were 92 % at 1 year, 83 % at 2 years, 69 % at 3 years, 58 % at 4 years, and 47 % at 5 years. Survival of Child-Pugh A patients (75 % at 3 years and 59 % at 5 years) was significantly longer (p 〈 0.01) than that of Child-Pugh B patients (61 % at 3 years and 35 % at 5 years). Combined TACE and PEI is an effective treatment for large HCC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050409
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    Paper (German National Licenses)
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  • 5
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    Effects of Surface Geology on Seismic Ground Motion Deduced from Ambient-Noise Measurements, in the Town of Avellino, Irpinia Region (Italy) (2012)
    Springer Verlag
    Details
    Publication Date: 2018-10-23
    Description: The effects of surface geology on ground motion provide an important tool in seismic hazard studies. It is well known that the presence of soft sediments can cause amplification of the ground motion at the surface, particularly when there is a sharp impedance contrast at shallow depth. The town of Avellino is located in an area characterised by high seismicity in Italy, about 30 km from the epicentre of the 23 November 1980, Irpinia earthquake (M = 6.9). No earthquake recordings are available in the area. The local geology is characterised by strong heterogeneity, with impedance contrasts at depth. We present the results from seismic noise measurements carried out in the urban area of Avellino to evaluate the effects of local geology on the seismic ground motion. We computed the horizontal-to-vertical (H/V) noise spectral ratios at 16 selected sites in this urban area for which drilling data are available within the first 40 m of depth. A Rayleigh wave inversion technique using the peak frequencies of the noise H/V spectral ratios is then presented for estimating Vs models, assuming that the thicknesses of the shallow soil layers are known. The results show a good correspondence between experimental and theoretical peak frequencies, which are interpreted in terms of sediment resonance. For one site, which is characterised by a broad peak in the horizontal-to-vertical spectral-ratio curve, simple one-dimensional modelling is not representative of the resonance effects. Consistent variations in peak amplitudes are seen among the sites. A site classification based on shear-wave velocity characteristics, in terms of Vs30, cannot explain these data. The differences observed are better correlated to the impedance contrast between the sediments and basement. A more detailed investigation of the physical parameters of the subsoil structure, together with earthquake data, are desirable for future research, to confirm these data in terms of site response.
    Description: Published
    Description: 1173 – 1188
    Description: 3.1. Fisica dei terremoti
    Description: 4.1. Metodologie sismologiche per l'ingegneria sismica
    Description: JCR Journal
    Description: restricted
    Keywords: Ambient noise ; HVSR ; site effects ; Avellino ; 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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