Determination of Absorbed Radiation Dose Levels of Lenses Thyroid and Oral Mucosa in Computed Tomography Imagining: Phantom Study

Abstract

Baş ve boyun bilgisayarlı tomografi (BT) görüntülemesi, en sık kullanılan radyolojik incelemelerinden biridir. Birçok hastalığın tanısında önemli rol oynar. Lens ve tiroid bezi radyasyona karşı en duyarlı organlardandır. Bu çalışmanın amacı, BT görüntülemesi yapıl an hastaların, lens, oral mukoza ve tiroid dokusunun maruz kaldığı radyasyon dozunun belirlenmesidir. Yöntem: Çalışmada, insan eşdeğeri olan Alderson Rando fantomunun tiroid, oral mukoza, lens bölgelerine termolüminesans dozimetreleri (TLD) yerleştirilmiş ve fantomun baş-boyun bölgesinin BT görüntülemesi yapılmıştır. Toplam 18 adet TLD kullanılmıştır. Öncelikle dozimetrelerin kalibrasyon işlemleri yapılmıştır. Bu dozimetrelerden 6 tanesi fantomun tiroid bölgesine, 4 tanesi oral mukozaya, 4 tanesi de lens bölgesine yerleştirilmiştir. 4 tane dozimetre ise arkaplan (background) ölçümleri için kullanılmıştır.

Evaluating Radiation Exposure to Oral Tissues in C-Arm Fluoroscopy A Dose Analysis

“…In the research, radiation doses affecting both superficial and deeper tissues of the oral cavity were meticulously measured, examining various exposure times ranging from 0.5 to 8 minutes, and thermoluminescence dosimeters (TLD-100) were used for precise measurement. According to the study of Günay et al [27], the radiation values measured for the oral mucosa during computed tomography were 10.36 mSv (minimum), 19.47 mSv (maximum) and the mean value was 15.15±2.96 mSv. According to the results of this study, the oral cavity internal mean value for 1 minute is 1.640925 mSv.…”

“…When the data of Günay et al [27] and the data of this study are compared with each other, the radiation dose to which the patient is exposed during 1 CT scan and a 9.23-minute C-arm fluoroscopy scan is equal to each other. According to this comparison, it can be concluded that C-arm fluoroscopy has a minimal impact on the patient compared to CT.…”

“…The selected phantom complies with ICRU-44 standards [29]. Representing a female, the phantom (Figure 1) stands at 155 cm in height and weighs 50 kg, with a material density of 0.985 g/cm³ [27].…”

“…Numerous studies have been conducted on radiation dosage calculation [17][18][19][20][21][22][23][24][25]. There are studies that determine the amount of radiation to which hospital personnel are exposed during surgeries in which fluoroscopy is actively used [26] or the radiation value to which the patient's oral mucosa is exposed during CT [27]. However, there is no study in the literature that determines the amount of radiation to which patients' oral cavity is exposed during fluoroscopy imaging.…”

Radiation Dose Levels in Submandibular and Sublingual Gland Regions during C-Arm Scopy

“…LiF:Mg,Ti material, chosen for its close equivalence to human tissue. This selection ensures accurate measurement of radiation exposure, as the material closely mimics human tissue properties [7].…”