Vrednosti povprečnih žleznih doz v presejalnem programu Dora in primerjava z vrednostmi povprečnih žleznih doz v tujih presejalnih programih

Kostiov, Anamarija (author)

Uvod: Mamografija je temeljna preiskava za zgodnje odkrivanje raka dojke. Kot vsako rentgensko slikanje tudi mamografija dozno obremeni preiskovanko. Kakovostno organiziran program presejanja je bistven za zgodnje odkrivanje raka dojk in zmanjšanje umrljivosti za to boleznijo. Del vsakega kakovostno organiziranega programa je zagotavljanje najnižje dozne obremenitve preiskovank. Namen: Namen raziskave je bil izračunati, kakšna je povprečna žlezna dozna obremenitev pacientke pri posamezni projekciji na mobilnih enotah presejalnega programa Dora in primerjati rezultate z vrednostmi povprečnih žleznih doz z dozami drugih presejalnih programov. Materiali in metode: Mamografa, ki se uporabljata na mobilnih enotah presejalnega programa Dora sta Siemens Inovation. Za izračun povprečne žlezne doze (MGD) je bila uporabljena metoda izračunavanja povprečnih žleznih doz po Dance et al, 2000. V raziskavo je bilo vključenih 2999 preiskovank (11996 projekcij), ki so bile pregledane v mesecu septembru leta 2010 in 2011. Do podatkov, potrebnih za izračun MGD sem prišla preko sistema IMPACS RIS (Agfa Helath care, Belgium). Raziskava je bila retrospektivna. Primerjava naših MGD s tujimi je bila narejena po pregledu strokovne literature. Rezultati in razprava: Povprečna vrednost MDG na mobilni enoti 1 je bila 1,57 mGy, na mobilni enoti 2 pa 1,83. Vrednosti povprečnih debelin dojke so bile na mobilni enoti 1 56,71 mm, na mobilni enoti 2 pa 57,04 mm. Razlike v povprečnih vrednostih MGD med septembru 2010 in septembrom 2011 so bile na mobilni enoti 1 majhne (manjše od 1%), na mobilni enoti 2 pa nekoliko večje (3%). Povprečna vrednost žlezne doze v mobilnih enotah programa Dora je bila 1,74 mGy, povprečna debelina dojke pa 57 mm. Dozna obremenitev na digitalnih mamografskih aparatih programa Dora je v povprečju za 50% manjša od doze na analognih mamografih, na katerih so bile opravljene tuje študije (Rosberg et al., 2000 in Kruger et al., 2001). Zaključek: Vrednosti povprečnih žleznih doz se v programu Dora razlikujejo glede na aparat, na katerem je preiskovanka slikana, so pa polovico nižje, kot jih navajajo študije, ki obravnavajo to temo.

• Language: Slovenian
• Keywords: mamografija, povprečna žlezna doza, MGD, presejalni program
• Typology: 1.09 - Published Professional Conference Contribution
• Organization: ZF - Faculty of Health Sciences
• Year: 2012
• Number of pages: Str. 19-23
• PID: 20.500.12556/RUL-114440
• UDC: 618.19-073.7
• URN: URN:NBN:SI:doc-K5YQLTLC
• COBISS.SI-ID: 4385899
• Publication date in RUL: 28.02.2020

Record is a part of a proceedings

• Title: Analogna in digitalna radiološka tehnologija
• Editors: Gašper Podobnik
• COBISS.SI-ID: 1284219

Record is a part of a journal

• Title: Bilten
• Publisher: Društvo radioloških inženirjev Slovenije, Zbornica radioloških inženirjev Slovenije
• ISSN: 1855-5136
• COBISS.SI-ID: 241400320

Secondary language

• Language: English
• Title: Values of mean glandular doses in Slovenian breast screening programme and comparison with foreign screening programmes

Abstract

Introduction: Mammography is a basic examination of early breast cancer detection. Like every x-ray examination mammography has also invasive effect on patients. High quality screening programme is essential for early detection of breast cancer and low mortality due to breast cancer. Part of high quality screening programme is assuring that patients receive the lowest possible dose exposures. Purpose: Purpose of research was to calculate average dose values in every projection on mobile units of DORA breast screening programme and to compare them to average glandular doses from other studies. Methods: Mobile units of breast screening programme are equipped with Siemens Inovation Mammograph. Mean glandular doses were calculated by the formula Dance et al., 2000. Research was performed on 2999 patients (11996 projections), examined in September 2010 and September 2011. Data used in calculations were collected within IMPACS RIS system (Agfa Health care, Belgium). Research took place retrospectively. Comparison between our MGD values and values from other studies was performed after the study of correspondent references. Results: The average MGD value in mobile unit 1 was 1,57 mGy and in mobile unit 2 1,83 mGy. The value of average breast thicknesses in mobile unit 1 is 56,71 mm and on mobile unit 2 57,04 mm. The differences between MGD values in September 2010 and September 2011 on mobile unit 1 were small (less than 1 percent), and on mobile unit 2 the differences were a bit higher (3 percents). Average MGD value in DORA breast screening programme was 1,74 mGy, average thickness was 57 mm. Doses in digital mammographs used in our screening programmes were 50 percent smaller then the doses on analogue mammographs used in other studies (Rosberg et al., 2000 in Kruger et al., 2001). Conclusion: MGD values of in DORA breast screening programme depend on the mamograph used in examination. Regarding the above subject, they are half smaller than the values calculated in other studies.

• Keywords: mammography, average glandular dose, MGD, breast screening programme Dora