Journal of Radiation Industry (방사선산업학회지)

Korean Society of Radiation Industry (한국방사선산업학회)
권호 표지

Measurement of the Noise according to the Slice Thickness in MDCT

MDCT에서 절편두께에 따른 Noise 측정

  • Moon, Il-Bong (Department of Radiological Technology, Gwangju Health University) ;
  • Dong, Kyung-Rae (Department of Radiological Technology, Gwangju Health University) ;
  • Kim, Mi-Hyun (Department of Radiological Technology, Gwangju Health University) ;
  • Choi, Sung-Hyun (Department of Radiology, Kyung Hee University Hospital at Gang-dong) ;
  • Kweon, Dae-Cheol (Department of Radiological Science, Shinhan University) ;
  • Goo, Eun-Hoe (Department of Radiological Science, Cheongju University)
  • 문일봉 (광주보건대학교 방사선과) ;
  • 동경래 (광주보건대학교 방사선과) ;
  • 김미현 (광주보건대학교 방사선과) ;
  • 최성현 (강동경희대학교병원 영상의학과) ;
  • 권대철 (신한대학교 방사선학과) ;
  • 구은회 (청주대학교 방사선학과)
  • Received : 2017.07.20
  • Accepted : 2017.09.10
  • Published : 2017.09.30

⟨ Previous Next ⟩

Abstract

MDCT is used to determine how the noise changes as the slice thickness changes. Noise according to thickness of 1.5, 3.0, 5.0 and 10.0 mm was analyzed using the Siemens (Somatom Definition Flash, Germany) equipment and calibration conditions such as tube voltage and tube current using the calibration QC phantom. 1.5, 3.0, 5.0 and 10.0 mm, respectively. The mean HU was 1.5 mm (7.7 HU), 3.0 mm (4.9 HU) and was reduced by 59.5% from 1.5 mm. 5.0 mm (3.9 HU) and 97.6% compared to 1.5 mm, 10.0 mm (3.1 HU) and 148% less than 1.5 mm. It was found that as slice thickness increased, noise decreased, while slice thickness decreased. In conclusion, setting the appropriate slice thickness for each site may be useful for obtaining appropriate noise and image quality.

Keywords

Acknowledgement

Supported by : Korea Radiation Safety Foundation (KORSAFe), Nuclear Safety and Security Commission (NSSC)