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1. Λαδία, Αρσενόη. Δόση θυρεοειδούς αδένα ασθενούς σε εξετάσεις οισοφαγογραφήματος.

Degree: 2010, University of Patras

Δοσιμετρία είναι ο κλάδος της επιστήμης που ασχολείται με τις μετρήσεις ιοντιζουσών ακτινοβολιών, με σκοπό την ποσοτική έκφραση της σχέσης μεταξύ των χαρακτηριστικών ενός πεδίου ακτινοβόλησης και του αποτελέσματος της ακτινοβόλησης ενός συστήματος. Η δοσιμετρία συνεισφέρει σημαντικά σε όσες επιστήμες κάνουν χρήση ιοντιζουσών ακτινοβολιών, και ιδιαίτερα στο χώρο της Ιατρικής, απ’ όπου και πρωτοξεκίνησε η εφαρμογή της. Υπάρχουν πολλές μέθοδοι δοσιμετρίας, και φυσικά, πολλά διαφορετικά είδη δοσιμέτρων. Στη συγκεκριμένη εργασία θα ασχοληθούμε αποκλειστικά με τη δοσιμετρία θερμοφωταύγειας. Το φαινόμενο της θερμοφωταύγειας βρίσκει πρακτική εφαρμογή στη δοσιμετρία ιοντιζουσών ακτινοβολιών με τη συλλογή των οπτικών φωτονίων που εκπέμπονται κατά την αποδιέγερση του θερμοφωταυγάζοντος υλικού, που χρησιμοποιείται. Η μέθοδος της θερμοφωταύγειας αποτελεί την πιο αξιόπιστη μέθοδο για την μέτρηση δόσεων ακτινοβολίας από ιατρικές εξετάσεις. Οι εφαρμογές της δοσιμετρίας θερμοφωταύγειας στην Ιατρική αφορούν κυρίως μετρήσεις της απορροφούμενης δόσεως στην Ακτινοθεραπεία και την Ακτινοδιαγνωστική, ενώ εφαρμόζεται σε μικρότερο βαθμό και στην Πυρηνική Ιατρική. Σκοπός της συγκεκριμένης εργασίας είναι η μέτρηση δόσεων ασθενών, που υποβάλλονται σε ακτινοδιαγνωστικές εξετάσεις, με τη βοήθεια κρυστάλλων θερμοφωταύγειας. Στην Ακτινοδιαγνωστική, η ανάγκη της δοσιμέτρησης προκύπτει από τις επιταγές της Ακτινοπροστασίας, η οποία απαιτεί τη μικρότερη δυνατή δόση στον ασθενή και το προσωπικό, με την καλύτερη δυνατή ποιότητα απεικόνισης. Κι η ανάγκη αυτή γίνεται πιο επιτακτική, όταν οι ακτινοδιαγνωστικές εξετάσεις αφορούν νεογνά και μικρά παιδιά, καθώς και συγκεκριμένες ομάδες του πληθυσμού που χαρακτηρίζονται από υψηλό βαθμό ακτινοευαισθησίας. Πιο συγκεκριμένα, καλούμαστε να υπολογίσουμε την δόση που λαμβάνουν ασθενείς στον θυροειδή αδένα, όταν υποβάλλονται σε εξέταση οισοφαγογραφήματος που πραγματοποιούνται προκειμένου να ελεγχθεί η φυσιολογία και η λειτουργία του πεπτικού συστήματος. Παράλληλα, καλούμαστε να εκτιμήσουμε τον τυχόν κίνδυνο καρκινογένεσης, λόγω των στοχαστικών αποτελεσμάτων της ακτινοβολίας, έπειτα από συσχέτιση με την τιμή της απορροφούμενης δόσης που προκύπτει.

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Advisors/Committee Members: Παναγιωτάκης, Γεώργιος, Ladia, Arsenoe, Σακελλαρόπουλος, Γεώργιος, Καλογεροπούλου, Χριστίνα.

Subjects/Keywords: Δοσίμετρο θερμοφωταυγείας; Οισοφαγογράφημα; Κινηματογράφηση; 615.842; TLD dosimeter; Esophagogram; Cine mode

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Λαδία, . (2010). Δόση θυρεοειδούς αδένα ασθενούς σε εξετάσεις οισοφαγογραφήματος. (Masters Thesis). University of Patras. Retrieved from http://nemertes.lis.upatras.gr/jspui/handle/10889/3682

Chicago Manual of Style (16th Edition):

Λαδία, Αρσενόη. “Δόση θυρεοειδούς αδένα ασθενούς σε εξετάσεις οισοφαγογραφήματος.” 2010. Masters Thesis, University of Patras. Accessed December 08, 2019. http://nemertes.lis.upatras.gr/jspui/handle/10889/3682.

MLA Handbook (7th Edition):

Λαδία, Αρσενόη. “Δόση θυρεοειδούς αδένα ασθενούς σε εξετάσεις οισοφαγογραφήματος.” 2010. Web. 08 Dec 2019.

Vancouver:

Λαδία . Δόση θυρεοειδούς αδένα ασθενούς σε εξετάσεις οισοφαγογραφήματος. [Internet] [Masters thesis]. University of Patras; 2010. [cited 2019 Dec 08]. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/3682.

Council of Science Editors:

Λαδία . Δόση θυρεοειδούς αδένα ασθενούς σε εξετάσεις οισοφαγογραφήματος. [Masters Thesis]. University of Patras; 2010. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/3682


RMIT University

2. Bawazeer, O. EPID based transit dosimetry to monitor inter-fraction variation in radiation therapy.

Degree: 2018, RMIT University

In radiotherapy treatment, an amorphous silicon electronic portal imaging device (a-Si EPID) is mounted to the linear accelerator and is routinely used to verify patient setup prior to treatment. EPIDs have garnered much research interest for their important clinical applications and advantageous features, such as high resolution and fast acquisition times. As well, EPIDs offer the potential for “free” transit dosimetry and simply detect the treatment beam, meaning that the patient receives no additional dose. However, experience with EPIDs for transit dosimetry applications in the clinical setting is partially limited because of the complexity of reproducing the published methods. Commercial solutions have been presented and are continuing to emerge but are not mature enough for widespread adoption. The goal of this project was to extend the application of EPIDs in two main clinical areas, with the overall goal of providing a simple procedure that uses minimal resources. The EPID was used in transit dosimetry and in measuring beam attenuation through couch and immobilization devices. For the first investigation, the modern delivery modalities can change the dose rate during delivery or can deliver a low monitor unit (MU). Therefore, the influence of the cine mode dosimetric characteristics of the EPID were examined. Emphasis was placed on delivering a low MU and changing the dose rates. The EPID’s performance was then compared to the well-documented integrated mode and dose measurements using an ionization chamber. The greatest nonlinearity was observed at low MU settings of less than 100 MU with the highest dose per frame. For dosimetric applications, this technique could be avoided by calibrating the EPID with a large number of MU. Despite the observed nonlinearity with low MU, EPID performance showed comparable responses, within 2%, when operated in cine and integrated acquisition modes. These results indicate that for dosimetry applications, no additional corrections are required when the EPID operated in cine compared to integrated mode. A transit dosimetry method published by Sabet and colleagues in 2014 utilized two-dimensional (2D) transit EPID images normalized to ionization chamber measurements at the depth of dose maximum in water at the EPID plane and included a number of corrections to determine the complete 2D field area. The present work expanded on this idea and simplified the methodology to determine the complete 2D in-field area by applying a single correction rather than several corrections, while maintaining the standard clinical flood field (FF) calibration.The calibration method was assessed by comparing transit doses derived from the EPID versus MapCHECK for thirty dynamic intensity modulated radiation therapy (dIMRT) fields. The mean gamma pass rates in the field area for the examined dIMRT fields were 94% ± 3% (1SD), with a maximum and minimum of 99.7% and 86.7%, respectively. The proposed method is less complicated than previous measurement…

Subjects/Keywords: Fields of Research; EPID; Cine mode; Inter-fraction variations; Similarity index; Couch and immobilization devices

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bawazeer, O. (2018). EPID based transit dosimetry to monitor inter-fraction variation in radiation therapy. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:162585

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Bawazeer, O. “EPID based transit dosimetry to monitor inter-fraction variation in radiation therapy.” 2018. Thesis, RMIT University. Accessed December 08, 2019. http://researchbank.rmit.edu.au/view/rmit:162585.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Bawazeer, O. “EPID based transit dosimetry to monitor inter-fraction variation in radiation therapy.” 2018. Web. 08 Dec 2019.

Vancouver:

Bawazeer O. EPID based transit dosimetry to monitor inter-fraction variation in radiation therapy. [Internet] [Thesis]. RMIT University; 2018. [cited 2019 Dec 08]. Available from: http://researchbank.rmit.edu.au/view/rmit:162585.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bawazeer O. EPID based transit dosimetry to monitor inter-fraction variation in radiation therapy. [Thesis]. RMIT University; 2018. Available from: http://researchbank.rmit.edu.au/view/rmit:162585

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of St. Andrews

3. Rutherford, Jennifer R. Sites of struggle: representations of family in Spanish film (1996-2004) .

Degree: 2010, University of St. Andrews

This thesis analyses how ways of thinking about and meanings of family are (re)negotiated and (re)presented in six films that, to varying degrees, are categorised as cine social. The group of films consists of Familia (León de Aranoa, 1996), Solas (Zambrano, 1999), Flores de otro mundo (Bollaín, 1999), Poniente (Gutiérrez, 2002), Te doy mis ojos (Bollaín, 2003) and Cachorro (Albaladejo, 2004). Despite the growing body of critical work on the wide-ranging social themes they deal with, little sustained attention has been given to their representations of family. Scholars tend to mention it only in passing, or refer back to the allegorical/mediating function that family has often played in Spanish cinema. The objective of this thesis is to place the emphasis, as the films do themselves, on the family per se. Insights into family from a range of academic fields including philosophy, sociology, feminist and queer theories and cultural, race and gender studies are combined with close textual readings and a consideration of the modes of representation and address employed in the films to analyse how they function as sites of ideological struggle. The thesis begins by sketching out historically and culturally situated definitions of family and providing an overview of some of its most iconic representations in Spanish cinema. Establishing many of the aspects developed in the main body of the thesis the first chapter concentrates on Familia, which denaturalises the hegemonic family by presenting it as a self-conscious performance. The subsequent four chapters focus on family forms, roles, practices, commitment, power dynamics and domestic space. They explore how the films’ affective and informed modes of address position the spectator in relation to criticisms of the traditional family and evaluations of emerging family ideologies, finally proposing that they could usefully be viewed as a cycle of postmodern family melodramas. Advisors/Committee Members: Bentley, Bernard Pierre Emile (advisor), Vidal, Belen (advisor).

Subjects/Keywords: Spanish film; Family; Postmodern family; Cine social; Melodrama; Affective mode of address; Familia; Solas; Te doy mis ojos; Cachorro; Flores de otro mundo; Poniente

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Rutherford, J. R. (2010). Sites of struggle: representations of family in Spanish film (1996-2004) . (Thesis). University of St. Andrews. Retrieved from http://hdl.handle.net/10023/2557

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Rutherford, Jennifer R. “Sites of struggle: representations of family in Spanish film (1996-2004) .” 2010. Thesis, University of St. Andrews. Accessed December 08, 2019. http://hdl.handle.net/10023/2557.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Rutherford, Jennifer R. “Sites of struggle: representations of family in Spanish film (1996-2004) .” 2010. Web. 08 Dec 2019.

Vancouver:

Rutherford JR. Sites of struggle: representations of family in Spanish film (1996-2004) . [Internet] [Thesis]. University of St. Andrews; 2010. [cited 2019 Dec 08]. Available from: http://hdl.handle.net/10023/2557.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rutherford JR. Sites of struggle: representations of family in Spanish film (1996-2004) . [Thesis]. University of St. Andrews; 2010. Available from: http://hdl.handle.net/10023/2557

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.