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[en] Heat shrinkable tubes and tapes made of irradiated polyethylene have been produced for several years. The memory effect of such products is widely used in many industrial applications. Hot-melt adhesive is often applied to provide better sealing properties of heat shrinkable products. Radiation grafting of hot-melt adhesives based on PP and copolymers like EVA was investigated. Several monomers were selected for radiation grafting process. Comparison of structural and mechanical properties with nonirradiated material was carried out
Journal
[en] Computed Tomography (CT) has been employed in 13 patients with bladder tumors; 8 of them subsequently underwent surgery. Concordance between CT and pathological staging ranged in 90% of accurate results. Our data are discussed and compared to those of other authors in the literature. Staging was carried out according to the International Union Against Cancer. CT proved to be very accurate in the assessment of local and regional spread of tumor, limphatic progression and early detection of ureteral obstruction, as well as diagnosis of distant metastasis in selected patients. In poor candidates for surgery CT provided invaluable data to be used for localizing fields of radiation therapy. CT is a very well tolerated procedure, it is therefore suitable in subsequent treatment control. (Author)
[pt]
Estudaram-se 13 pacientes portadores de tumores de bexiga com Tomografia Computarizada (TC) sendo 8 deles submetidos a cirugia. Compararam-se os dados da TC com os da anatomia patologica, encontrando-se uma concordancia de 90%. Os resultados sao discutidos e comparados com os de outros autores da literatura. O estadiamento se fez de acordo com a Classificacao da Uniao Internacional contra o Cancer. A TC mostrou ser um metodo com alto nivel de confiabilidade para estudar a invasao local e regional do tumor, a disseminacao linfatica e o diagnostico precoce da obstrucao uretral, e para a deteccao de metastases distantes em pacientes selecionados. Fornece informacao muito valiosa para ser usada na localizacao dos campos na radioterapia. E um procedimento muito bem tolerado e particularmente util para o acompanhamento e controle de tratamento dos pacientes. (I.C.R.)Journal
Radiologia Brasileira; ISSN 0100-3984; 
; v. 15(2); p. 90-95
; v. 15(2); p. 90-95
[en] The doses of radiation to the lenses, thyroid, skin and aggregates of lymphatic tissue in the pharynx during plain films and pantomography of the teeth were determined. The highest doses to the lenses were received during plain film taking of the upper molars (1.25 mGy), to the thyroid the highest dose was during mandibular plain film taking (0.29 mGy). The highest irradiation of the skin was measured at the site of the beam directed to the studied tooth (48.20 mGy). During pantomography the highest doses to the radiation- sensitive pharyngeal lymphatic tissue (15.90 mGy) were found at the site of beam crossing. 8 refs. (author)
Journal
[en] Lead shields on the eyes used during cerebral angiography made by the method of Cole are described. The doses to selected points are given: nose bridge and centres of the eyelids of both eyes. On the basis of the obtained data it was found that the shields reduced the doses from 89.2% to 95.6% for the eye, and their shadow did not impair interpretation of the vascular pattern. Conditions are discussed when shields should not be applied. (author)
Journal
Pol. Przegl. Radiol. Med. Nukl; ISSN 0032-3748; ; v. 45(3); p. 153-155
; v. 45(3); p. 153-155
[en] Therapeutic results obtained by means of radium applicators are presented in 76 cases of primary vaginal carcinoma and the rates of 5-year survival are compared with the degree of tumour progression and radium dose. The mean cure rate was 34.2% and in grade 3 of progression the cure rate was 22.2%. Considering late radiation-induced lesions it was found that better results were obtained with higher gamma radiation doses of 226 Ra, particularly in grades 2 and 3 of progression, although in these groups radiation-induced injury was much more frequent. (author)
Journal
[en] The purpose of this work was to examine some properties of the Ni-Al 70/30 plasma sprayed coating on a 0.45% C structural steel base. On the base of analysis of microstructure as well as phase and chemical composition, microhardness and wear resistance of coating it has been found that intermetallic protective layer have attracted attention in a view of their structure application, especially under condition of abrasive wear with cast on iron. (author)
Journal
Inzynieria Materialowa; ISSN 0208-6247; ; v. 20(5); p. 402-408
; v. 20(5); p. 402-408
[en] The doses of ionizing radiation to which the eyeball is exposed during radiological investigation of the head were measured. It was demonstrated that the greatest exposure occurred during serial taking of radiograms in pneumoencephalography and angiography as well as during plain cranial films taken in the antero-posterior projection when the dose to the eye equals the surface dose. Film taking in this projection should be avoided if the condition of the patient makes this possible and if it is possible to take the films in the reverse projection. Lead shields reduce also the dose received by the lens. (author)
Journal
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