Pediatrik Yaşta Bilgisayarlı Tomografi Uygulamalarında Radyasyon Dozunu Azaltma Stratejileri

Bilgisayarlı tomografi, pediyatrik yaş grubunda kullanımı gün geçtikçe artan bir görüntülemetekniğidir. Pediatrik yaş grubunun radyasyona duyarlı olması ve radyasyonun kanser riskioluşturmasında kümülatif dozun etkin olması verilen doza dikkat edilmesini gerektirmektedir.Çocuklara erişkin protokollerinin uygulanması, kilo bağımlı değişikliklerin yapılmaması, verilendozun ölçümünde ve riskin belirlenmesinde standartların belli olmaması, yüksek dozlar içincezai müeyyidenin olmaması önemli sorunlardır. Ancak gerekli durumlarda, -sadece- hedefvücut alanlarının bilgisayarlı tomografi ile değerlendirilmesi, parametrelerin çocuklar içinyeniden düzenlenmesi ve her çocuğa özel protokol değişikliklerinin yapılması ile radyasyondozu önemli ölçüde azaltılabilir. Radyasyonu azaltmada, kullanılan tomografi aletinin teknikparametre değişiklikleri (tüp akımı, kilovolt piki, masa hızı) iyi bilinmeli ve dikkatliceuygulanmalıdır

Anahtar Kelimeler:

bilgisayarlı tomografi, çocukluk çağı, radyasyon

Strategies to Limit Radiation Dose in Pediatric Computed Tomography Applications

Computed tomography is an increasingly used imaging modality in childhood. Since pediatricpopulation possess increased radiosensitivity and radiation-related cancer risk is related withcumulative dose, the radiation exposure must be carefully established. Use of the same CTsettings for adults and children, deficiency of weight adjusted protocols, lack of consensus forthe measurement of dose and related risks of radiation, and absence of penalties for higher dosesare essential problems. Radiation dose can significantly be decreased with evaluation of -onlytargeted part of the body in appropriate conditions, rearrangement of the scanning parametersfor children, and subject based protocol and dose adjustment for each children. The alternationsin technical parameters of CT device like tube current, kilovoltage peak, table speed should bewell-known and carefully applied for limitation of the radiation dose

Keywords:

computed tomography, childhood, radiation,

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