Earticle

초록

영어

This study aimed to compare the image quality according to distant from table to detector (22.4 and 35.7 cm) when acquiring single photon emission tomography (SPECT) images. The discovery SPECT/computed tomography (GE, USA) and NEMA IEC body phantom were used, and image was aquired by using 99mTc which is maintained as 8:1 between hot sphere and background activity ratio during 10 minutes. In addition, quantitative analysis was performed by drawing the region of interests (ROIs) using singal to noise ratio (SNR), coefficient of variation (COV), and contrast to noise ratio (CNR). Based on the results, SNR result occurred diffenrece approximatley 16.1 % accoriding to distance from table to detector. In addition, COV result was also approximately 6.2 % and CNR result show approximately 11.6 %. In conclusion, the distant from table to detector is crucial in nuclear medicine image because it is effective for image quality. We confirmed that image quality is improved in SPECT images when locating to object closely.

한국어

본 연구의 목적은, 테이블과 디텍터간의 거리에 따른 SPECT 영상의 질을 평가하고자 한다. 영상의 질 평가를 위해 SPECT/CT (GE, USA) 와 NEMA IEC 몸통 팬텀을 이용하였다. 방사성동위원소는 99mTc를 팬텀에 삽입하였고, hot sphere 와 background 방사능량 비율을 8:1 로 유지하였고, 테이블과 디텍터 간의 거리를 22.4 cm 와 35.7 cm 유지하며 10분동안 영상을 획득하였다. 정량적인 평가인자로는 signal to noise ratio (SNR), coefficient of variation (COV), contrast to noise ratio (CNR)을 적용하였다. SNR, COV, CNR 의 결과값을 바탕으로, 테이블과 디텍터간의 거리가 가까울수록 영상의 질이 우수함을 확인하였다.

목차

Abstract
Ⅰ. 서론
Ⅱ. 재료 및 방법
1. 실험대상 및 방법
2. 정량적 분석
Ⅳ. 고찰 및 결론
참고문헌
요약

키워드

저자

• Chan Rok Park [ 박찬록 | Department of Radiological Science, Jeonju University ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한디지털의료영상학회논문지 [Korean Journal of Digital Imaging in Medicine]

• 간기

  연3회

• pISSN

  1976-7641

• 수록기간

  1995~2026

• 십진분류

  KDC 510 DDC 610