Journals / Süleyman Demirel Üniversitesi Fen Edebiyat Fakültesi Fen Dergisi / 2019 / Cilt: 14 - Sayı: 2

Effects of Voltage and Current Values to Patient Dose by CTDI Phantom

Voltaj ve Akım Değerlerinin Hasta Dozu Üzerindeki Etkilerinin CTDI Fantomu ile Araştırılması

Pages
327–334
Publication Date
2019-11-30
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Especially in small and thin patients such as the head phantom, the dose increase is higher.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Computed tomography is a modern device and plays an important role in diagnostic imaging.
📊
Key Findings & Data:The aim of this study was to examine the dose changes in two water-equivalent cylindrical phantoms with different diameters, one 16 cm in diameter and the other 32 cm in diameter, by changing the tube voltage (kVp), tube current (mU) and slices thickness values in CT.
💡
Conclusion & Impact:Especially in small and thin patients such as the head phantom, the dose increase is higher.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:CTDI · Doz · Fantom

Abstract

Computed tomography is a modern device and plays an important role in diagnostic imaging. The aim of this study was to examine the dose changes in two water-equivalent cylindrical phantoms with different diameters, one 16 cm in diameter and the other 32 cm in diameter, by changing the tube voltage (kVp), tube current (mU) and slices thickness values in CT. The absorbed dose values obtained by the ionization chamber were converted to the relevant parameters by means of a package program available on the computer. The calculated CTDIvol for a given volume and the DLP values giving the total dose value taken during the cross-sectional length were compared. As can be seen from the results of the study, the dose increases with increasing the current and voltage values. Especially in small and thin patients such as the head phantom, the dose increase is higher.

Özet

Bilgisayarlı tomografi (CT) günümüzde etkin bir şekilde kullanılan modern bir cihaz olup, tanısal görüntülemede çok önemli bir yer tutmaktadır. Bu çalışmanın amacı, CT’de tüp voltajı (kVp), tüp akımı (mAs) ve kesit kalınlığı değerlerini değiştirerek farklı çaplara sahip biri 16 cm çapında ve diğeri 32 cm çapında olan su eşdeğeri silindirik iki adet fantomda doz değişimlerini incelemektir. İyonizasyon odası ile okunan soğurulan doz değerleri bilgisayarda var olan bir paket programı yardımıyla ilgili parametrelere çevrilmiştir. Belli bir hacim için hesaplanan CTDIvol ve kesit alınan uzunluk boyunca aldığı toplam doz değerini veren DLP değerleri karşılaştırılmıştır. Çalışma sonuçlarından da görüldüğü gibi, doz artışı akım ve voltaj değerini arttırdıkça yükselmektedir. Özellikle kafa fantomu örneğindeki gibi küçük ve zayıf hastalarda doz artışı daha fazladır.

🔖

Cite This Article

SARPÜN, İ. H., İNAL, A., ÇEÇEN, B. (2019). Effects of Voltage and Current Values to Patient Dose by CTDI Phantom. Süleyman Demirel Üniversitesi Fen Edebiyat Fakültesi Fen Dergisi, Cilt: 14 - Sayı: 2, 327–334. https://ajindex.com/articles/260917

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (12)

  1. S. Reynolds, “The downside of Diagnostic Imaging,” NCI Cancer Bulletin, 7(2), 8-9, 2010
  2. UNSCEAR, “Sources, effects and risks of ionization radiation,” UNSCEAR Report 2013 Vol. I, Report to General Assembly, New York, 2013, pp. 1-19
  3. AAPM, “The measurement, reporting, and management of radiation dose in CT,” AAPM Report No. 96, Report of AAPM Task Group 23 of the Diagnostic Imaging Council CT Committee, College Park, 2008, pp. 27-35
  4. AAPM, “Site specific dose estimates (SSDE) in pediatric and adult body CT examinations,” AAPM Report No. 204, Report of AAPM Task Group 204 of AAPM, College Park, 2011, pp. 41-56
  5. AAPM, “Comprehensive methodology for the evaluation of radiation dose in X-ray computed tomography,” AAPM Report No. 111, Report of AAPM Task Group 111: The future of CT dosimetry, College Park, 2010, pp. 21-23
  6. J. A. Bauhs, T. J. Vrieze, A. N. Primak, M. R. Bruesewitz, and C. H. McCollough, “CT dosimetry: comparison of measurement techniques and devices,” Radiographics, 28 (1), 245-253, 2008
  7. M. J. Siegel, B. Schmidt, D. Bradley, C. Suess, and C. Hildebolt, “Radiation dose and image quality in pediatric CT: effect of technical factors and phantom size and shape,” Radiology, 233 (2), 515-522, 2004
  8. J. J. DeMarco, C. H. Cagnon, D. D. Cody, D. M. Stevens, C. H. McCollough, M. Zankl, E. Angel, and M. F. McNitt-Gray, “Estimating radiation doses from multidetector CT using Monte Carlo simulations: effects of different size voxelized patient models on magnitudes of organ and effective dose,” Phys. Med. Biol., 52 (9), 2583-2597, 2007
  9. A. C. Turner, M. Zankl, J. J. DeMarco, C. H. Cagnon, D. Zhang, E. Angel, D. D. Cody, D. M. Stevens, C. H. McCollough, and M. F. McNitt-Gray, “The feasibility of a scanner-independent technique to estimate organ dose from MDCT scans: using CTDIvol to account for differences between scanners,” Med. Phys., 37 (4), 1816–1825, 2010
  10. S. M. Lee, W. Lee, J. W. Chung, E.-A. Park, and J. H. Park, "Effect of kVp on image quality and accuracy in coronary CT angiography according to patient body size: a phantom study," Int. J. of Cardiovascular Imaging, 29, 83-91, 2013
  11. Q. Li, H. Yua, L. Zhang, L. Fana, and S.-Y. Liu, "Combining low tube voltage and iterative reconstruction for contrast-enhanced CT imaging of the chest - Initial clinical experience," Clinical Radiology, 68 (5), 249-253, 2013
  12. Z. Szucs-Farkas, C. Schaller, S. Bensler, M. A. Patak, P. Vock, and S. T. Schindera, "Detection of