컴퓨터단층촬영 검사 시 테이블 높이에 따른 화질 특성에 관한 연구

• 영문명: A Study on Characteristic of Image Quality according to CT Table Height in Computed Tomography
• 발행기관: 대한방사선과학회(구 대한방사선기술학회)
• 저자명: 김기원 민정환 이상선 이영봉 이기종 박한솔 오주영
• 간행물 정보: 『방사선기술과학』제46권 제4호, 295~301쪽, 전체 7쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2023.08.31

영문 초록

In addition to protocol adjustments during CT examinations, the height of the CT table can also affect image quality. Therefore, this study aimed to investigate the change in image quality depending on the height of the table in brain CT, which accounts for a large proportion of CT examinations, by measuring signal to contrast to noise ratio (CNR) and noise power spectrum (NPS) using the head phantom and evaluating them. The head phantom images were acquired using Philips Brilliance iCT 256. When the image was acquired, the table height was adjusted to 815, 865, 915, 965, 1015, and 1030 mm, respectively, and each scan was performed 3 times for each height. The CNR result showed the highest value at 965 mm, which is the height adjacent to the center of the head phantom. NPS showed the lowest NPS at 915 mm, the center of the head phantom in the low frequency region. From these results, it can be seen that the height of the table in CT examination is closely related to the image quality, and it can be seen the characteristics of image quality according to CT table through quantitative evaluation methods such as CNR and NPS.

목차

Ⅰ. 서 론

Ⅱ. 대상 및 방법

Ⅲ. 결 과

Ⅳ. 고 찰

Ⅴ. 결 론

REFERENCES

키워드

컴퓨터단층촬영 컴퓨터단층촬영 테이블 화질 대조도 대 잡음비 잡음전력스펙트럼 Computed Tomography CT Table Image Quality Contrast to Noise Ratio Noise Power Spectrum