Tek Enerji ve Hızlı Voltaj Değişimli Çift Enerji Abdomen Bilgisayarlı Tomografilerine Ait Bilgisayarlı Tomografi Doz İndekslerinin Karşılaştırılması

Amaç: Tek kaynaklı tek enerji (TK TE) ve tek kaynaklı hızlı voltaj değişimli çift enerji (TK HVD-ÇE) abdomen bilgisayarlı tomografilerine (BT) ait BT doz indekslerini (BTDİ) karşılaştırmak.Gereç ve Yöntemler: Bu prospektif çalışmada, yaş ortalaması 52±15,7 yıl olan 73 hastadan (32 Kadın ve 41 Erkek) elde olunmuş HVD-ÇE abdomen BT’lere ait ortalama BTDİ, TE abdomen BT’lere ait ortalama BTDİ’ler ile karşılaştırıldı. Tüm hastaların vücut kitle indeksleri (VKİ) ve BT taramalarına ait BTDİ’leri kaydedildi. İstatistiksel analiz için örneklem t testi kullanıldı. P değeri <0.05 istatistiksel olarak anlamlı kabul edildi.Bulgular: Ortalama VKİ 24.2±7.6 ve HVD-ÇEBT ile TEBT’lere ait ortalama BTDİ değerleri sırasıyla 14.6±2.5 mGy ve 12.5±7.2 mGy idi. Her iki teknik ile elde olunan ortalama BTDİ’ler arasındaki fark anlamlıydı (p=0.02). HVD-ÇE abdomen BT’ye ait ortalama CTDİ, TE abdomen BT’ye göre %14.4 daha fazla idi. Sonuç: HVD-ÇE abdomen BT’ye ait ortalama CTDİ, TE abdomen BT’ye göre %14.4 daha fazla idi.

Anahtar Kelimeler:

Çift enerji, Abdomen BT, BT, Çift enerji BT

Comparison of Computed Tomography Dose İndices for Single Energy and Fast Kilovoltage Switching Dual Energy Abdominal Computed Tomographies

Objective: To investigate the computed tomography dose index (CTDI) of the single source fast kilovoltage-switching dual energy CT (SS FKS-DECT) of the abdomen compared to conventional single source single energy (SSSE) CT.Materials and Methods: In this prospective study, the mean CTDI of the SS FKS-DECT of the abdomen obtained from 73 patients (32 women and 41 men) with a mean age of 52±15.7 years, compared to the CTDI of the conventional SSSE CT. Body mass index (BMI) of all patients and CTDI of all scans were noted. Two-tailed student t test was used for statistical analysis. P value of <0.05 was considered as statistically significant. Results: The mean BMI was 24.2±7.6 and the mean CTDI for the FKS-DECT and SECT were 14.6±2.5 mGy and 12.5±7.2 mGy, respectively. The difference between the CTDI values of both acquisitions were statistically significant (p=0.02). The mean CTDI of the FKS-DECT of the abdomen was 14.4% higher than those for the SECT. Conclusion: The mean CTDI of the SS FKS-DE abdomen CT was 14.4% higher than those of the SS SE abdomen CT.

Keywords:

Dual energy, Abdominal CT, CT, Dual energy CT,

PDF

___

1. Thomas C, Krauss B, Ketelsen D, et al. Differentiation of urinary calculi with dual energy CT: effect of spectral shaping by high energy tin filtration. Investigative radiology 2010; 45:393-398
2. Graser A, Johnson TR, Chandarana H and Macari M. Dual energy CT: preliminary observations and potential clinical applications in the abdomen. European radiology 2009; 19:13-23
3. Schoepf UJ and Colletti PM. New dimensions in imaging: the awakening of dual-energy CT. AJR American journal of roentgenology 2012; 199:S1-2
4. Flohr TG, McCollough CH, Bruder H, et al. First performance evaluation of a dual-source CT (DSCT) system. European radiology 2006; 16:256-268
5. Agrawal MD, Pinho DF, Kulkarni NM, Hahn PF, Guimaraes AR and Sahani DV. Oncologic applications of dual-energy CT in the abdomen. Radiographics : a review publication of the Radiological Society of North America, Inc 2014; 34:589-612
6. Uhrig M, Simons D, Kachelriess M, Pisana F, Kuchenbecker S and Schlemmer HP. Advanced abdominal imaging with dual energy CT is feasible without increasing radiation dose. Cancer imaging : the official publication of the International Cancer Imaging Society 2016; 16:15
7. Purysko AS, Primak AN, Baker ME, et al. Comparison of radiation dose and image quality from single-energy and dual-energy CT examinations in the same patients screened for hepatocellular carcinoma. Clinical radiology 2014; 69:e538-544
8. Ho LM, Yoshizumi TT, Hurwitz LM, et al. Dual energy versus single energy MDCT: measurement of radiation dose using adult abdominal imaging protocols. Academic radiology 2009; 16:1400-1407
9. Li B, Yadava G and Hsieh J. Quantification of head and body CTDI(VOL) of dual-energy x-ray CT with fast-kVp switching. Medical physics 2011; 38:2595-2601
10. Lin XZ, Wu ZY, Tao R, et al. Dual energy spectral CT imaging of insulinoma-Value in preoperative diagnosis compared with conventional multi-detector CT. European journal of radiology 2012; 81:2487-2494