ABSTRACT
Objectives: to study the accuracy of cytopathology and to evaluate it as diagnostic pathological tool in breast diseases.Method:a prospective study in the period between Jan 2006 and Feb 2008.Data were analysed using the SPSS. Sensitivity; specificity and accuracy were calculated and compared to literature. Results: Total number of reports was 542; 271 for each cytopathology and histopathology. The overall mean age was 41.0+ 15.3 (ranging between 14- 80) years.The overall sensitivity; specificity and accuracy of cytopathology were 56.1; 80.9 and 63.8respectively while those of histopathology were 93.5; 83.5 and 89.7respectively.Conclusion: FNAC has low sensitivity; specificity and accuracy
Subject(s)
Biopsy , Breast Neoplasms/diagnosis , Diagnostic Imaging , MammographyABSTRACT
Sorption is an important process for the transport of radionuclides through backfill materials in a radioactive waste underground repository. Within this study, sorption of Cs on selected Czech clay materials and their mixtures with sand was investigated by batch tests. The experiments were performed under oxic conditions at 25 degrees C. Synthetic groundwater as a liquid phase and unconditioned clays (as they were provided by their producer) were used to reach the natural conditions as close as possible. Distribution ratios (Rds) of Cs for all selected clays rise with increase of the clay fraction in clay/sand mixtures in agreement with previous works studying sorption behaviour of such mixtures. The rise of Rds is from 10(2) cm3 g(-1) for mixtures with 80% of sand to 10(3) cm3 g(-1) for pure clays. There are significant differences between natural and technologically modified clays.
Subject(s)
Aluminum Silicates/chemistry , Cesium Radioisotopes/analysis , Cesium Radioisotopes/chemistry , Silicates/chemistry , Silicon Dioxide/chemistry , Soil Pollutants, Radioactive/analysis , Adsorption , Aluminum Silicates/analysis , Clay , Complex Mixtures/analysis , Complex Mixtures/chemistry , Czech Republic , Diffusion , Environmental Monitoring/methods , Radiometry/methods , Silicon Dioxide/analysisABSTRACT
The capabilities of neutron and photon activation analysis (NAA and PAA, respectively) for low-level determination of silicon in biological materials have been examined. Sensitivities of a variety of modes of NAA and PAA with radiochemical separation have been evaluated. Results are presented for silicon in reference materials CSRM 12-2-03 Lucerne, Bowen's Kale, NIST SRM-1571 Orchard Leaves, and NIST SRM-1515 Apple Leaves. The results were obtained by employing the 29Si(n,p)29Al reaction with fast reactor neutrons and the radiochemical procedure developed for aluminium separation. Possibilities of further improvement of the silicon determination limit down to the microg g(-1) level by employing NAA and PAA with radiochemical separation are outlined.
