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Biomedical subjects

G Bucci

Publications and source records attributed to G Bucci.

86 records · Page 5Linked to original sources
PubMedDate not supplied

Integrating content-based retrieval in a medical image reference database.

Image reference databases (IRDBs) are a recurrent research topic in medical imaging. Most IRDBs are designed to help experienced physicians in diagnostic tasks and require that users have prior extensive knowledge of the field for their use to be fruitful. Therefore, the educational potential of such image collections cannot be exploited thoroughly. In this paper we propose an image-indexing method to extend the functionalities of an existing medical IRDB and allow for its use in educational applications, as well as in computer-assisted diagnosis. Our method, based on the Kahrunen-Leève transform, has been used to develop a content-based search engine for tomographic image databases on which we are presently experimenting and which we aim to integrate into a working radiological IRDB installed at the University of Florence. Results achieved in our preliminary tests are also reported.

Brain↗
PubMedDate not supplied

[Current problems of the surgical treatment of rectal cancer: analysis of the literature and personal experience].

The surgical procedure is a crucial factor in preventing local recurrence in rectal cancer, and total mesorectal excision (TME) particularly is widely accepted as being associated with a decreased local recurrence rate. In this study, concerning 187 patients with rectal cancer, we compare conventional surgery, performed in 140 patients from 1979 to 1993, with a standardised TME procedure in 47 patients over the period from 1994 to 1998. The first group not treated by TME were operated on for 56 (40%) tumours of the upper rectum and 84 (60%) of the lower rectum; 35 (25%) were Dukes' A, 77 Dukes' B and 28 (20%) Dukes' C. 42 abdominoperineal amputations (30%) and 98 anterior resections (70%) were performed. The second group in which TME was performed comprised 17 (36%) tumours of the upper rectum and 30 (64%) of the lower rectum, 8 (17%) in stage I AJCC (Dukes' A), 16 (34%) in II (B) and 23 (49%) in III (C). 9 abdominoperineal amputations (19%) and 38 anterior resections (81%) were performed, 8 (21%) with an ultra-low anastomosis. In the first group of patients we observed 28 local recurrences (20%) and a 5-year disease-free survival in 50% of cases. In the second group we achieved a decreased rate of local recurrence (10.6%) which is about half that observed after conventional surgery, but there was no significant difference in survival. These data confirm the effectiveness of TME in reducing local recurrence rate, according to the literature; in future this procedure can get to reconsider the role of adjuvant therapy in the management of rectal cancer.

Adenocarcinoma↗
PubMedDate not supplied

[Recent data on the spread of Listeria spp. in the province of Ferrara].

The results of the investigations of Listeria held from 1985 to 1989 in samples of foods, surface waters and stools are reported. On the whole 98 strains of Listeria were isolated, 38 of which were L. monocytogenes. The first isolation of L. grayi from human stools is pointed out.

Animals↗
PubMedDate not supplied

Seasonal changes of parafollicular and follicular cells of the dormouse thyroid (Myoxus glis): an ultrastructural and immunocytochemical study.

The follicular epithelium of dormouse thyroid consists of two distinct cellular types, follicular and parafollicular cells. Parafollicular cells can be easily identified by their high cytoplasmic dye-affinity for phloxine, round to ovoid shape, basal arrangement and lack of contact with follicular colloid. The wide cytoplasmic matrix is clear and contains many secretory granules of variable electron density whose contents histochemically appears to be proteic with a lean glucidic component. Furthermore immunocytochemical reactions with antibodies against calcitonin and somatostatin showed that both hormones are co-stored in the secretory granules of all parafollicular cells. Both follicular and parafollicular cells show seasonal morphological variations in their secretory activity. Follicular cell activity is high in summer, reaches a peak in late fall or prehibernation and progressively slows down throughout hibernation. Parafollicular cells exhibit a fair synthetic activity in summer, in fall, and in the animals captured during winter hibernating sleep and killed after 12 days stay in laboratory. In winter sleep, granules with interrupted membrane and cottony contents are prevalent and the ultrastructural aspects suggest an intense discharge of secretion. The results are compared with those from other hibernating mammalians and discussed in the light of blood calcium values and seasonal balances of other metabolisms.

Animals↗
PubMedDate not supplied

[Further observations on healthy carriers of Salmonellae in the province of Ferrara (1976-1977),(author's transl)].

366 Salmonella strains (2.03%), belonging to 40 different serotypes, were isolated by Authors in 1976 from feces of healthy subjects, in the province of Ferrara; 262 strains (1.45%), belonging to 34 serotypes, were isolated in 1977. The Authors found no significant difference between isolations carried out in both sexes; highest frequencies of isolation were recorded in August, September and October. We have also reported the serotypes more frequently isolated by various Authors from sick and healthy men feces, from animal feces, from sewage and from surface waters.

Adolescent↗