ANALYSIS OF THE EFFECT OF CARE DOSE 4D SOFTWARE USE ON IMAGE QUALITY AND RADIATION DOSE ON THE CT SCAN ABDOMEN

  • Ni Larasati Kartika Sari Universitas Nasional
  • Merry Suzana Rumah Sakit Hermina Depok, Jl. Siliwangi No.50, Pancoran MAS, Kota Depok, Jawa Barat 16431
  • Muzilman Muslim Universitas Nasional, Jalan Sawo Manila, Pejaten, Pasar Minggu, Jakarta Selatan 11520
  • Dewi Muliyati Physics Education Department, Universitas Negeri Jakarta, Jalan Rawamangun Muka, Jakarta Timur 13220
Keywords: CT Number, CTDIvol, noise, noise power spectrum

Abstract

The CT Scan is the most significant contributor to radiation dose on radiological examination, although the frequency of the examination is far below other modalities. In order to control this radiation dose, manufactures of CT Scan have equipped their units with built-in software called Automatic Exposure Control (AEC). This study aims to analyze the effect of AEC software, CARE Dose 4D, on image quality, and CTDIvol. Objects used in this study were three water phantoms, each with a diameter of 165 mm, 230 mm, and 305 mm. The image quality-analyzed was CT Number and noise. Measurement of image quality was carried out following Bapeten's provisions. Noise Power Spectrum (NPS) graphics were also used to further observes noise texture. The CT Number accuracy, CT Number, and noise uniformity obtained with and without CARE Dose 4D, on the three phantoms were still within Bapeten's threshold. This indicates that the use of CARE Dose 4D can still image a homogeneous object accurately. The results of the NPS curve showed that the two modes, in three phantoms, were having the same noise texture. The NPS curves also showed that the use of CARE Dose 4D produces higher noise than the non-CARE Dose 4D mode. Meanwhile, there were significant differences from the CTDIvol obtained from the two modes. The use of CARE Dose 4D software reduced dose of up to 54.34%. From this, the use of CARE Dose 4D software can reduce the radiation dose while maintaining image quality.

References

D. J. Brenner and E. J. Hall, “Computed tomography, an increasing source of radiation exposure,” N. Engl. J. Med., 2007, vol. 357, no. 22,

C. H. McCollough et al., “Strategies for Reducing Radiation Dose in CT,” Radiologic Clinics of North America, 2009.

Fajri et al., “Analisis Perbandingan Parameter dan Profil Dosis Menggunakan Phantom Standard dan Tidak Standar,” Universitas Diponegoro, Semarang, Dikutip: https://www.youngster.physicsjurnal.com. Diakses tanggal 19 Mei 2019.

B. F. Wall, “Ionising radiation exposure of the population of the United States: NCRP Report No. 160,” Radiat. Prot. Dosimetry, 2009, vol. 136.

Shawna L. et al., “CARE Dose 4D CT Automatic Exposure Control System: Physics Principles and Practical Hints. Radiological Society of North America,” Scientific Assembly and Annual Meeting, November 25 - November 30, 2007 ,Chicago I.L., 2007. http://archive.rsna.org/2007/5011233.html Accessed February 28, 2020.

C. H. Lee et al., “Radiation Dose Modulation Techniques in the Multidetector CT Era: From Basics to Practice,” Radio Graphics, 2008, vol. 28.

Justin B. Solomon et al., “Relating Noise to Image Quality Indicators in CT Examinations With Tube Current Modulation,” AJR, 2013, vol. 200.

G. R. Iball et al., “Assessment of tube current modulation in pelvic CT,” The British Journal of Radiology, 2006, vol. 79.

M. Soderberg and M. Gunnarsson, “Automatic exposure control in computed tomography – an evaluation of systems from different manufacturers,” Acta Radiologica, 2010, vol. 51.

K. K. Lau et al., “Imaging Techniques in Improving Image Quality of CT Abdomen: What Are the Latest?”, The Royal of Australian and New Zealand College of Radiologists, 2016,

https://epos.myesr.org/ranzcr/viewing/?module=viewing_poster&pi=135764, Accessed April 5, 2020.

M. Bruesewitz et al., “Smart mA – Automatic Exposure Control (AEC): Physics Principles and Practical Hints Automatic Exposure Control (AEC) Systems in CT Using AEC to Prescribe the Desired Image Quality AEC and Image Quality,” Med. Educ., 2008.

S. S. Mannudeep K. Kalra et al., “Techniques and Applications of Automatic Tube Current Modulation for CT1 Introduction,” RSNA, 2004.

C. H. McCollough and J. M. K. Michael R. Bruesewitz, “CT Dose Reduction and Dose Management Tools: Overview of Available Options,” RSNA, 2006, vol. 26.

J. T. Bushberg et al., “The Essential Physics of Medical Imaging,” 2012, vol. 30, no. 7.

Published
2020-04-30
How to Cite
Kartika Sari, N. L., Suzana, M., Muslim, M., & Muliyati, D. (2020). ANALYSIS OF THE EFFECT OF CARE DOSE 4D SOFTWARE USE ON IMAGE QUALITY AND RADIATION DOSE ON THE CT SCAN ABDOMEN. Spektra: Jurnal Fisika Dan Aplikasinya, 5(1), 31 - 40. https://doi.org/10.21009/SPEKTRA.051.04