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Biomedical subjects

A Toti

Publications and source records attributed to A Toti.

At least 19 recordsLinked to original sources
PubMed1987

[Comparison between phantoms for quality control in xeromammography].

An indicator of operating technique (phantom) is very useful for quality control in diagnostic radiology. We tested experimentally that the "Random Phantom" is the most suitable between those commercially available for xeromammography. In fact this indicator points out image quality alterations caused even by very small variations of the physical parameters affecting image quality. We did not test the phantoms for mammographic technique but we believe that the "Random" is the most suitable in this field too.

Humans↗
PubMed1986

Breast cancer risk factors in Italian women: a multicentric case-control study.

To evaluate the importance of several risk factors for breast cancer in the Italian female population, a large multicentric case-control study was conducted in 10 breast clinics in Italy. The study included 1,556 women affected by breast cancer, histologically and/or cytologically confirmed. Controls were 1,505 women admitted to a hospital in the same town, matched with cases for residence and with the same age distribution of the Italian female population. The risk factors considered in this study were family history of breast cancer, reproductive history, height and weight, use of oral contraceptives, other hormonal therapies and smoking history. The results of this study confirm the significant role of a positive family history of breast cancer (RR = 2.37); the relative risk was even higher when a first-degree relative was affected or the breast cancer was bilateral. The analysis of the reproductive history showed a significant trend of increasing risk with increasing age at first birth and, although less evident, with increasing number of children. Quetelet's index (kg/m-2) was positively correlated with breast cancer risk, mostly in postmenopausal women. Among other studied factors, only late age at menopause confirmed an increased risk for breast cancer, whereas age at menarche, use of oral contraceptives and smoking histories did not show any significant correlation with breast cancer risk. These results are in substantial agreement with other international studies, but represent an interesting contribution to studies about the Italian female population.

Abortion, Spontaneous↗
PubMed1985

[Xeroangiography. Technical principals and applied developments].

The physical patterns ruling the information of a xeroradiographic image allow the visualization of the arterial system with a lower concentration of contrast medium. So you can visualize the arterial branches both with intravenous injection of the usual angiographic concentration of contrast medium or with intraarterial injection of diluted contrast medium at a very low concentration. A prerequisite to successful xeroangiography was the commercial diffusion of a changer for xerox cassettes allowing several exposures according to standardized programs.

Angiography↗
PubMed1985

[Transvenous xeroangiography of arteriovenous fistulas of patients undergoing periodic hemodialysis].

Xeroradiography allows visualisation of the arterial system after intravenous injection of contrast media. This method has proved particularly useful for diagnosis of changes in the arteriovenous fistulas of 20 patients on chronic haemodialysis. In all cases transvenous xeroangiography gave information about morphologic alterations of vessels and soft tissues. Among the commonly used angiographic methods, transvenous xeroangiography appears the technique of choice.

Aged↗
PubMed1983

[Ultrasonographic study in breast immersion].

100 breast symptomatic patients have been examined with ultrasound, using an automated water-path scanner (Senomatic 3D CGR), and commercial B-mode or real-time scanners. All the patients were also examined with xeromammography. Normal breast patterns, as well as benign and malignant breast lesions, are presented.

Adenofibroma↗
PubMed1980

Possible indication of breast cancer risk through discriminant functions.

In the Ferrara province of Italy, a screening programme for the detection of breast cancer was initiated in 1965; by 1976, 21,120 women had been examined. The biologic history of the women participating in the program is routinely collected at registration. Several biological variables can be extracted from the history. We used 15 biologic variables in order to construct discriminant functions between women affected by breast cancer and a group of control women. It was found that four variables suffice to separate the group of the women with breast cancer from the control group, although with some degree of uncertainty. The theory was advanced that the individual values of a discriminant function may be associated with the risk of healthy women for developing breast cancer. Data collected after the construction of the discriminant function hint at such an association. We have attempted to calculate a discriminant value for healthy women participating in screening programs, so that those having a discriminant value below a given threshold may be considered at higher risk than those above the threshold. The women in the high-risk group may then be submitted to an appropriate examination schedule.

Adult↗
PubMed1978

[Phagocytic lymphocyte-like elements (PLLE) and irradiation in vitro].

The peripheral blood of rats contains lymphocyte-like phagocytes after intracardial injection of India ink. In vitro irradiation of whole blood (1000 r - 60Co), causes marked reduction in whole lymphocytes but does not modify the number and morphological integrity of the phagocytes, which can therefore be held to be comparatively radioresistant: as such, they could belong either to the mononucleate phagocyte system or to the lymphatic system (T4 lymphocytes). Since T-lymphocytes are not capable of phagocytosis, the former hypothesis would appear the most probable.

Animals↗