{"id":{"repo_id":"greece","oai_identifier":"oai:10442/0002"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/0002","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΝΕΑ ΥΛΙΚΑ ΘΩΡΑΚΙΣΕΩΣ ΕΝΑΝΤΙ ΦΩΤΟΝΙΩΝ ΚΑΙ ΝΕΤΡΟΝΙΩΝ ΠΑΡΑΓΟΜΕΝΩΝ ΑΠΟ ΙΑΤΡΙΚΑ ΜΗΧΑΝΗΜΑΤΑ.","abstract":"\"STEEL-CONCRETE\" IS A MIXTURE OF CONCRETE AND \"STEEL PUNCHINGS\" (BY-PRODUCT OF PRESSES OF INDUSTRY). THE TRANSMISSION FOR THIS SHIELDING MATERIAL OF BEAMS PRODUCED BY TELETHERAPY UNITS FOR PRIMARY AND SECONDARY RADIATION, HAVE BEEN MEASURED. THE CONSTRUCTION COST OF THE TREATMENT ROOM USING \"STEEL-CONCRETE\", IS THREE TIMES LOWER THAN THAT USING IRON AND THE NECESSARY THICKNESS IS THREE TIMES LESS THAN USING ORDINARY CONCRETE. SPECIAL CARE IS REQUIRED FOR THE SHIELDING OF THE DOOR OF TREATMENT ROOM OF ACCELARATORS. SEVERAL INEXPENSIVE MATERIALS, SUCH AS POLYETHYLENE IN FORM OF PEARLS, \"XYLOTEX\", \"NOVOPAN\", CAN BE USED TO SIGNIFICANTLY REDUCE THE COST OF THE DOOR. THE PHOTONEUTRONS ATTENUATION FOR THESE MATERIALS HAS BEEN MEASURED FOR MEDICAL ACCELARATORS.","abstract_html":""STEEL-CONCRETE" IS A MIXTURE OF CONCRETE AND "STEEL PUNCHINGS" (BY-PRODUCT OF PRESSES OF INDUSTRY). THE TRANSMISSION FOR THIS SHIELDING MATERIAL OF BEAMS PRODUCED BY TELETHERAPY UNITS FOR PRIMARY AND SECONDARY RADIATION, HAVE BEEN MEASURED. THE CONSTRUCTION COST OF THE TREATMENT ROOM USING "STEEL-CONCRETE", IS THREE TIMES LOWER THAN THAT USING IRON AND THE NECESSARY THICKNESS IS THREE TIMES LESS THAN USING ORDINARY CONCRETE. SPECIAL CARE IS REQUIRED FOR THE SHIELDING OF THE DOOR OF TREATMENT ROOM OF ACCELARATORS. SEVERAL INEXPENSIVE MATERIALS, SUCH AS POLYETHYLENE IN FORM OF PEARLS, "XYLOTEX", "NOVOPAN", CAN BE USED TO SIGNIFICANTLY REDUCE THE COST OF THE DOOR. THE PHOTONEUTRONS ATTENUATION FOR THESE MATERIALS HAS BEEN MEASURED FOR MEDICAL ACCELARATORS.","abstract_has_math":false,"creators":["Koutroubas, Stylianos","Κουτρουμπάς, Στυλιανός"],"institution":"University of Patras","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1985,"date_issued":"1985","date_published":"1985","updated_at":"2026-07-24T02:25:08Z","subjects":["RADIATION PROTECTION IN THERAPY INSTALLATIONS ΠΡΟΣΤΑΣΙΑ","Ακτινοβολία","ΑΚΤΙΝΟΘΕΡΑΠΕΥΤΙΚΟΙ ΘΑΛΑΜΟΙ","ΑΚΤΙΝΟΠΡΟΣΤΑΣΙΑ ΙΑΤΡΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ","ΕΞΑΣΘΕΝΗΣΗ ΑΚΤΙΝΟΒΟΛΙΑΣ","ΘΩΡΑΚΙΣΗ ΦΩΤΟΝΕΤΡΟΝΙΩΝ ΙΑΤΡΙΚΩΝ ΕΠΙΤΑΧΥΝΤΩΝ","ΥΛΙΚΑ ΘΩΡΑΚΙΣΗΣ","SHIELDING MATERIALS FOR RADIOTHERAPY ROOMS","Ιατρική και Επιστήμες Υγείας","Κλινική Ιατρική","Medical and Health Sciences","Clinical Medicine"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0002"],"render_values":[{"text":"10.12681/eadd/0002","href":"https://doi.org/10.12681/eadd/0002","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/0002","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Koutroubas, Stylianos","Κουτρουμπάς, Στυλιανός"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1985"]},{"key":"dc:publisher","label":"Institution","values":["University of Patras","Πανεπιστήμιο Πατρών"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["RADIATION PROTECTION IN THERAPY INSTALLATIONS ΠΡΟΣΤΑΣΙΑ","Ακτινοβολία","ΑΚΤΙΝΟΘΕΡΑΠΕΥΤΙΚΟΙ ΘΑΛΑΜΟΙ","ΑΚΤΙΝΟΠΡΟΣΤΑΣΙΑ ΙΑΤΡΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ","ΕΞΑΣΘΕΝΗΣΗ ΑΚΤΙΝΟΒΟΛΙΑΣ","ΘΩΡΑΚΙΣΗ ΦΩΤΟΝΕΤΡΟΝΙΩΝ ΙΑΤΡΙΚΩΝ ΕΠΙΤΑΧΥΝΤΩΝ","ΥΛΙΚΑ ΘΩΡΑΚΙΣΗΣ","SHIELDING MATERIALS FOR RADIOTHERAPY ROOMS","Ιατρική και Επιστήμες Υγείας","Κλινική Ιατρική","Medical and Health Sciences","Clinical Medicine"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0002","http://hdl.handle.net/10442/hedi/0002"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"STEEL-CONCRETE\" IS A MIXTURE OF CONCRETE AND \"STEEL PUNCHINGS\" (BY-PRODUCT OF PRESSES OF INDUSTRY). THE TRANSMISSION FOR THIS SHIELDING MATERIAL OF BEAMS PRODUCED BY TELETHERAPY UNITS FOR PRIMARY AND SECONDARY RADIATION, HAVE BEEN MEASURED. THE CONSTRUCTION COST OF THE TREATMENT ROOM USING \"STEEL-CONCRETE\", IS THREE TIMES LOWER THAN THAT USING IRON AND THE NECESSARY THICKNESS IS THREE TIMES LESS THAN USING ORDINARY CONCRETE. SPECIAL CARE IS REQUIRED FOR THE SHIELDING OF THE DOOR OF TREATMENT ROOM OF ACCELARATORS. SEVERAL INEXPENSIVE MATERIALS, SUCH AS POLYETHYLENE IN FORM OF PEARLS, \"XYLOTEX\", \"NOVOPAN\", CAN BE USED TO SIGNIFICANTLY REDUCE THE COST OF THE DOOR. THE PHOTONEUTRONS ATTENUATION FOR THESE MATERIALS HAS BEEN MEASURED FOR MEDICAL ACCELARATORS.","ΤΟ \"ΣΙΔΗΡΟΔΕΜΑ\" ΕΙΝΑΙ ΕΝΑ ΝΕΟ ΥΛΙΚΟ ΘΩΡΑΚΙΣΕΩΣ ΕΝΑΝΤΙ ΦΩΤΟΝΙΩΝ ΕΝΕΡΓΕΙΑΣ 1 - 45MEV ΠΟΥ ΠΑΡΑΓΟΝΤΑΙ ΑΠΟ ΥΠΕΡΔΥΝΑΜΙΚΑ ΑΚΤΙΝΟΘΕΡΑΠΕΥΤΙΚΑ ΜΗΧΑΝΗΜΑΤΑ. ΑΦ'ΕΝΟΣ ΕΧΕΙΠΟΛΥ ΜΙΚΡΟΤΕΡΟ ΚΟΣΤΟΣ ΑΠΟ ΤΟ ΜΟΛΥΒΔΟ ΚΑΙ ΑΡΚΕΤΑ ΜΙΚΡΟΤΕΡΟ ΑΠΟ ΤΟ ΣΙΔΗΡΟ, ΑΦ'ΕΤΕΡΟΥ ΕΧΕΙ ΔΙΠΛΑΣΙΑ ΠΥΚΝΟΤΗΤΑ ΚΑΙ ΠΕΡΙΠΟΥ ΔΙΠΛΑΣΙΟ ΑΤΟΜΙΚΟ ΑΡΙΘΜΟ ΣΕ ΣΧΕΣΗ ΜΕ ΤΟΣΚΥΡΟΔΕΜΑ. ΑΠΟΤΕΛΕΙΤΑΙ ΔΕ ΑΠΟ ΜΙΓΜΑ ΤΣΙΜΕΝΤΟΚΟΝΙΑΣ ΚΑΙ ΥΠΟΠΡΟΙΟΝΤΩΝ ΒΙΟΜΗΧΑΝΙΩΝ ΔΙΑΤΡΗΣΕΩΣ ΧΑΛΥΒΔΟΕΛΑΣΜΑΤΩΝ. ΜΕΛΕΤΗΘΗΚΕ ΠΕΙΡΑΜΑΤΙΚΑ Η ΕΞΑΣΘΕΝΗΣΗ ΠΟΥ ΠΡΟΚΑΛΕΙΤΟ \"ΣΙΔΗΡΟΔΕΜΑ\" ΣΤΗΝ ΠΡΩΤΕΥΟΥΣΑ ΚΑΙ ΤΗ ΣΚΕΔΑΖΟΜΕΝΗ ΣΕ ΔΙΑΦΟΡΕΣ ΓΩΝΙΕΣ ΑΚΤΙΝΟΒΟΛΙΑ, ΠΟΥ ΕΚΠΕΜΠΕΤΑΙ ΑΠΟ ΜΟΝΑΔΕΣ ΚΟΒΑΛΤΙΟΥ 60 ΚΑΙ ΕΠΙΤΑΧΥΝΤΕΣ ΔΙΑΦΟΡΩΝ ΤΥΠΩΝ. ΜΕΤΡΗΣΕΙΣ ΕΞΑΣΘΕΝΗΣΗΣ ΤΗΣ ΡΟΗΣ ΚΑΙ ΤΗΣ ΙΣΟΔΥΝΑΜΗΣ ΔΟΣΗΣ ΦΩΤΟΝΕΤΡΟΝΙΩΝ, ΠΟΥ ΦΘΑΝΟΥΝ ΣΤΗ ΘΗΡΑ ΤΟΥ ΘΑΛΑΜΟΥ ΕΠΙΤΑΧΥΝΤΩΝ, ΑΠΟ ΦΘΗΝΑ ΒΙΟΜΗΧΑΝΙΚΑ ΥΛΙΚΑ (Π.Χ. ΠΟΛΥΑΙΘΥΛΕΝΙΟ ΣΕ ΚΟΚΚΟΥΣ) ΑΠΟΤΕΛΟΥΝ ΤΟ ΔΕΥΤΕΡΟ ΜΕΡΟΣ ΤΗΣ ΕΡΓΑΣΙΑΣ."]},{"key":"dc:title","label":"Title","values":["ΝΕΑ ΥΛΙΚΑ ΘΩΡΑΚΙΣΕΩΣ ΕΝΑΝΤΙ ΦΩΤΟΝΙΩΝ ΚΑΙ ΝΕΤΡΟΝΙΩΝ ΠΑΡΑΓΟΜΕΝΩΝ ΑΠΟ ΙΑΤΡΙΚΑ ΜΗΧΑΝΗΜΑΤΑ.","NEW SHIELDING MATERIALS FOR RADIOTHERAPY ROOMS"]}]}],"canonical_facts":{"dc:creator":["Koutroubas, Stylianos","Κουτρουμπάς, Στυλιανός"],"dc:date":["1985"],"dc:description":["\"STEEL-CONCRETE\" IS A MIXTURE OF CONCRETE AND \"STEEL PUNCHINGS\" (BY-PRODUCT OF PRESSES OF INDUSTRY). THE TRANSMISSION FOR THIS SHIELDING MATERIAL OF BEAMS PRODUCED BY TELETHERAPY UNITS FOR PRIMARY AND SECONDARY RADIATION, HAVE BEEN MEASURED. THE CONSTRUCTION COST OF THE TREATMENT ROOM USING \"STEEL-CONCRETE\", IS THREE TIMES LOWER THAN THAT USING IRON AND THE NECESSARY THICKNESS IS THREE TIMES LESS THAN USING ORDINARY CONCRETE. SPECIAL CARE IS REQUIRED FOR THE SHIELDING OF THE DOOR OF TREATMENT ROOM OF ACCELARATORS. SEVERAL INEXPENSIVE MATERIALS, SUCH AS POLYETHYLENE IN FORM OF PEARLS, \"XYLOTEX\", \"NOVOPAN\", CAN BE USED TO SIGNIFICANTLY REDUCE THE COST OF THE DOOR. THE PHOTONEUTRONS ATTENUATION FOR THESE MATERIALS HAS BEEN MEASURED FOR MEDICAL ACCELARATORS.","ΤΟ \"ΣΙΔΗΡΟΔΕΜΑ\" ΕΙΝΑΙ ΕΝΑ ΝΕΟ ΥΛΙΚΟ ΘΩΡΑΚΙΣΕΩΣ ΕΝΑΝΤΙ ΦΩΤΟΝΙΩΝ ΕΝΕΡΓΕΙΑΣ 1 - 45MEV ΠΟΥ ΠΑΡΑΓΟΝΤΑΙ ΑΠΟ ΥΠΕΡΔΥΝΑΜΙΚΑ ΑΚΤΙΝΟΘΕΡΑΠΕΥΤΙΚΑ ΜΗΧΑΝΗΜΑΤΑ. ΑΦ'ΕΝΟΣ ΕΧΕΙΠΟΛΥ ΜΙΚΡΟΤΕΡΟ ΚΟΣΤΟΣ ΑΠΟ ΤΟ ΜΟΛΥΒΔΟ ΚΑΙ ΑΡΚΕΤΑ ΜΙΚΡΟΤΕΡΟ ΑΠΟ ΤΟ ΣΙΔΗΡΟ, ΑΦ'ΕΤΕΡΟΥ ΕΧΕΙ ΔΙΠΛΑΣΙΑ ΠΥΚΝΟΤΗΤΑ ΚΑΙ ΠΕΡΙΠΟΥ ΔΙΠΛΑΣΙΟ ΑΤΟΜΙΚΟ ΑΡΙΘΜΟ ΣΕ ΣΧΕΣΗ ΜΕ ΤΟΣΚΥΡΟΔΕΜΑ. ΑΠΟΤΕΛΕΙΤΑΙ ΔΕ ΑΠΟ ΜΙΓΜΑ ΤΣΙΜΕΝΤΟΚΟΝΙΑΣ ΚΑΙ ΥΠΟΠΡΟΙΟΝΤΩΝ ΒΙΟΜΗΧΑΝΙΩΝ ΔΙΑΤΡΗΣΕΩΣ ΧΑΛΥΒΔΟΕΛΑΣΜΑΤΩΝ. ΜΕΛΕΤΗΘΗΚΕ ΠΕΙΡΑΜΑΤΙΚΑ Η ΕΞΑΣΘΕΝΗΣΗ ΠΟΥ ΠΡΟΚΑΛΕΙΤΟ \"ΣΙΔΗΡΟΔΕΜΑ\" ΣΤΗΝ ΠΡΩΤΕΥΟΥΣΑ ΚΑΙ ΤΗ ΣΚΕΔΑΖΟΜΕΝΗ ΣΕ ΔΙΑΦΟΡΕΣ ΓΩΝΙΕΣ ΑΚΤΙΝΟΒΟΛΙΑ, ΠΟΥ ΕΚΠΕΜΠΕΤΑΙ ΑΠΟ ΜΟΝΑΔΕΣ ΚΟΒΑΛΤΙΟΥ 60 ΚΑΙ ΕΠΙΤΑΧΥΝΤΕΣ ΔΙΑΦΟΡΩΝ ΤΥΠΩΝ. ΜΕΤΡΗΣΕΙΣ ΕΞΑΣΘΕΝΗΣΗΣ ΤΗΣ ΡΟΗΣ ΚΑΙ ΤΗΣ ΙΣΟΔΥΝΑΜΗΣ ΔΟΣΗΣ ΦΩΤΟΝΕΤΡΟΝΙΩΝ, ΠΟΥ ΦΘΑΝΟΥΝ ΣΤΗ ΘΗΡΑ ΤΟΥ ΘΑΛΑΜΟΥ ΕΠΙΤΑΧΥΝΤΩΝ, ΑΠΟ ΦΘΗΝΑ ΒΙΟΜΗΧΑΝΙΚΑ ΥΛΙΚΑ (Π.Χ. ΠΟΛΥΑΙΘΥΛΕΝΙΟ ΣΕ ΚΟΚΚΟΥΣ) ΑΠΟΤΕΛΟΥΝ ΤΟ ΔΕΥΤΕΡΟ ΜΕΡΟΣ ΤΗΣ ΕΡΓΑΣΙΑΣ."],"dc:identifier":["10.12681/eadd/0002","http://hdl.handle.net/10442/hedi/0002"],"dc:language":["gre"],"dc:publisher":["University of Patras","Πανεπιστήμιο Πατρών"],"dc:subject":["RADIATION PROTECTION IN THERAPY INSTALLATIONS ΠΡΟΣΤΑΣΙΑ","Ακτινοβολία","ΑΚΤΙΝΟΘΕΡΑΠΕΥΤΙΚΟΙ ΘΑΛΑΜΟΙ","ΑΚΤΙΝΟΠΡΟΣΤΑΣΙΑ ΙΑΤΡΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ","ΕΞΑΣΘΕΝΗΣΗ ΑΚΤΙΝΟΒΟΛΙΑΣ","ΘΩΡΑΚΙΣΗ ΦΩΤΟΝΕΤΡΟΝΙΩΝ ΙΑΤΡΙΚΩΝ ΕΠΙΤΑΧΥΝΤΩΝ","ΥΛΙΚΑ ΘΩΡΑΚΙΣΗΣ","SHIELDING MATERIALS FOR RADIOTHERAPY ROOMS","Ιατρική και Επιστήμες Υγείας","Κλινική Ιατρική","Medical and Health Sciences","Clinical Medicine"],"dc:title":["ΝΕΑ ΥΛΙΚΑ ΘΩΡΑΚΙΣΕΩΣ ΕΝΑΝΤΙ ΦΩΤΟΝΙΩΝ ΚΑΙ ΝΕΤΡΟΝΙΩΝ ΠΑΡΑΓΟΜΕΝΩΝ ΑΠΟ ΙΑΤΡΙΚΑ ΜΗΧΑΝΗΜΑΤΑ.","NEW SHIELDING MATERIALS FOR RADIOTHERAPY ROOMS"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:25:08Z"}