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

Yıl 2018, Cilt: 8 Sayı: 1, 41 - 45, 26.03.2018

Osman Melih Topcuoğlu

https://doi.org/10.31832/smj.380347

Öz

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

Öz

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.

Anahtar Kelimeler

Dual energy, Abdominal CT, CT, Dual energy CT

Kaynakça

• 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