Browsing by All Authors "Bulur, Emine"
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Item Activity concentrations of 224Ra, 226Ra, 228Ra and 40K radionuclides in refinery products and the additional radiation dose originated from oil residues in Turkey(Oxford University Press, 2013-10) Parmaksız, Aydın; Ağuş, Yusuf; Bulgurlu, Figen; Bulur, Emine; Yıldız, Çiğdem; Öncü, Tolga; AAH-5187-2020; 0000-0003-4000-5175; TAEK-SANAEMTotal of 56 crude oil, refinery product, waste water, sludge and scale samples collected from three refineries were measured by gamma-ray spectrometry. Except for nine samples, all refinery products samples were found below the minimum detectable activity (MDA) values. 224Ra, 226Ra, 228Ra and 40K activity concentrations in crude oil and refinery product samples were measured from MDA values to 11.7±4.5, 14.9±3.5, 11.6±4.5, 248.5±18.5 Bqkg-1 respectively. 224Ra, 226Ra, 228Ra and 40K activity concentrations in scale, sludge and water samples were measured from MDA values to 343.7±11.8, 809.2±29.0, 302.5±21.6, 623.0±80.9 Bqkg-1 respectively. Radium equivalent activities of residue samples were calculated up to 1241.8±42.4 Bq/kg. Maximum activity concentration index and alpha index were found 4.2 and 4.0 respectively. The annual effective doses of four residue samples were calculated equal or above permitted dose rate for public, i.e. 1mSv/y.Item Average glandular doses and national diagnostic reference levels in mammography examinations in Turkey(Oxford University Press, 2020-05) Parmaksız, Aydın; Ataç, G. K.; Bulur, Emine; İnal, Tolga; Alhan, Aslıhan; AAH-5187-2020; 0000-0003-4000-5175; TAEK-Radyasyon ve Hızlandırıcı Teknolojileri Dairesi BaşkanlığıIn order to establish National Diagnostic Reference Levels (DRLs) for mammography examinations, Entrance Skin Air Kerma (ESAK), Entrance Skin Dose (ESD) and Average Glandular Doses (AGDs) were calculated for a total of 25624 cranio-caudal (CC) and mediolateral oblique (MLO) projections of 6309 patients for 40-49 and 50-64 age groups. The average ESAK and ESD values for both age groups were found to be higher in MLO projections compared to CC projections. The minimum and maximum values of AGDs were determined as 0.4 mGy and 7.9 mGy for both projections. The maximum numbers of AGDs for CC and MLO projections were calculated in the range of 1.1-1.5 mGy and 1.6-2.0 mGy respectively. The third quartile values of AGDs were calculated for each compressed breast thickness (CBT) between 20 mm and 99 mm. The first National DRLs of the country were established for each 10 mm CBT in mammography examinations.Item CVP-2 (creative valuable protector-2) radyasyon filtresinin c-kollu skopi cihazı ile kullanılması(Türkiye Atom Enerjisi Kurumu, 2018) Parmaksız, Aydın; Bulur, Emine; Başdoğan, Miray; Kaan Ataç, Gökçe; Turpçu, Ufuk; Şen, Sema; AAH-5187-2020; 0000-0003-4000-5175; TAEK-Radyasyon ve Hızlandırıcı Teknolojileri Dairesi BaşkanlığıT.C. Sağlık Bakanlığı, Türkiye İlaç ve Tıbbi Cihaz Kurumu Başkanlığımın 20/12/2017 tarihli ve 78704445-000-E.254790 sayılı yazısı ile “ Aymed Medikal Teknoloji San. ve Tic. Ltd. Şti” isimli firma tarafından piyasaya arz edilmek istenen “CVP-2 (Creative Valuable Protector-2) Radyasyon Filtresi” isimli ürünün C-kolIu skopi cihazlarında kullanılması durumunda hastanın ve çalışanların radyasyonun zararlı etkilerinden korunmasına yönelik olduğu belirtilen bir cihaz olarak tanımlandığı ve üreticisinin beyan ettiği dozimetrik çalışma dışında klinik veri veya değerlendirmenin bulunmaması nedeniyle ülkemizde kullanılması için beyan edilen işlevleri yerine getirip getirmediği, getiriyorsa radyasyondan korunma için dozimetrik testlerin yapılarak değerlendirilmesine ilişkin görüşlerimizin paylaşılması talep edilmiştir. Bu raporda; Bayındır Sağlık Grubuna ait Söğütözü Bayındır Hastanesi ve Ufuk Üniversitesi Dr. Rıdvan Ege Hastanesi'nin ameliyathanelerinde kullanılan C-kollu skopi cihazlarına CVP-2 Radyasyon Filtresinin adaptörsüz olarak takılı olduğu ve takılı olmadığı durum senaryoları için ameliyathane koşullarında gerçekleştirilen ışınlamalar sonucunda; hasta ve personelin alabileceği radyasyon dozları ile CVP-2 Radyasyon Filtresinin kullanımına ilişkin radyolojik değerlendirmeler bulunmaktadır.Item Measurement of enhanced radium isotopes in oil production wastes in Turkey(Elsevier, 2015-03) Parmaksız, Aydın; Ağuş, Yusuf; Bulgurlu, Figen; Bulur, Emine; Öncü, Tolga; Özkök, Yücel Özer; AAH-5187-2020; /0000-0003-4000-5175; TAEK-SANAEMGamma dose rates of oil production equipment and wastes were measured externally by survey meter. They were found to be between 0.2 μSv h−1 and 25.7 μSv h−1. Activity concentrations of radium isotopes in crude oil, scale, sludge, contaminated soil and water samples were determined by gamma spectrometric method. Activity concentrations of 224Ra, 226Ra and 228Ra in samples varied from MDA to 132,000 Bq kg−1. Radium isotopes enriched up to 14,667 times in scale samples. The highest value of 226Ra was found to be 35,122 ± 1,983 Bq kg−1 for sludge samples. Activity concentrations of a considerable number of samples were found to be higher than the exemption level recommended by IAEA. Measurement results revealed that oil production wastes caused soil contamination up to 70,483 Bq kg−1. They may pose a radiological risk for workers and members of the public.Item Patient doses from CT examinations in Turkey(Turkish Society of Radiology, 2015) Ataç, Gökçe Kaan; Parmaksız, Aydın; İnal, Tolga; Bulur, Emine; Bulgurlu, Figen; Öncü, Tolga; Gündoğdu, Sadi; 59391; 0000-0002-4145-8275; TAEK-SANAEMPURPOSE We aimed to establish the first diagnostic reference levels (DRLs) for computed tomography (CT) examinations in adult and pediatric patients in Turkey and compare these with international DRLs. METHODS CT performance information and examination parameters (for head, chest, high-resolution CT of the chest [HRCT-chest], abdominal, and pelvic protocols) from 1607 hospitals were collected via a survey. Dose length products and effective doses for standard patient sizes were calculated from the reported volume CT dose index (CTDIvol). RESULTS The median number of protocols reported from the 167 responding hospitals (10% response rate) was 102 across five different age groups. Third quartile CTDIvol values for adult pelvic and all pediatric body protocols were higher than the European Commission standards but were comparable to studies conducted in other countries. CONCLUSION The radiation dose indicators for adult patients were similar to those reported in the literature, except for those associated with head protocols. CT protocol optimization is necessary for adult head and pediatric chest, HRCT-chest, abdominal, and pelvic protocols. The findings from this study are recommended for use as national DRLs in TurkeyItem Unintentional irradiation of conceptus by diagnostic imaging examinations in Turkey(Oxford University Press, 2014-12) Parmaksız, Aydın; Ataç, G. K.; Bulgurlu, Figen; Bulur, Emine; Öncü, Tolga; İnal, T.; AAH-5187-2020; 0000-0003-4000-5175; TAEK-SANAEMExposure of the fetus with medical radiation sources during the diagnostic procedures without intention is one of the most significant concerns in the medical community. In this study, 45 conventional x-ray and computed tomography examinations of the women who were unaware of their pregnancies were investigated. Effective doses and fetal doses were calculated for each application by using PCXMC and ImPACT CT scan software. The exposure of abdominal CT and abdominal conventional x-ray examinations were found to be over the literature for both the range and the average values. Some risks so-called childhood cancer induction, hereditary effects, decline in IQ and severe mental retardation were calculated for the range of each protocol. It was found that accidental exposure to the fetus in abdominal x-ray examinations, even without targeting the uterus, might increase the likelihood of childhood cancer development and severe mental retardation up to ̴ 3-4 times and ̴ 2-3 times respectively.