Brain SPECT 검사 시 Dynamic Continuous Mode의 유용성 평가

• 영문명: The Evaluation of Dynamic Continuous Mode in Brain SPECT
• 발행기관: 대한핵의학기술학회
• 저자명: 박선명(Park Sun Myung) 김수영(Kim Soo Yung) 최성욱(Choi Sung Wook)
• 간행물 정보: 『핵의학기술』Vol.21 No.1, 15~22쪽, 전체 8쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2017.06.30

영문 초록

Purpose During Brain SPECT study, critical factor for proper study with ⁹⁹ᵐ Tc-ECD or ⁹⁹ᵐ Tc-HMPAO is one of the important causes to patent’s movement. It causes both improper diagnosis and examination failure. In this study, we evaluated the effect of Dynamic Continuous Mode Acquisition compared to Step and Shoot Mode to raise efficacy and reject the data set with movement, as well as, be reconstructed in certain criteria. Materials and Methods Deluxe Jaszczak phantom and Hoffman 3D Brain phantom were used to find proper standard data set and exact time. Step and Shoot Mode and Dynamic Continuous Mode Acquisition were performed with SymbiaT16. Firstly, Deluxe Jaszczak phantom was filled with Na⁹⁹ᵐTcO₄ 370 MBq and obtained in 60 minutes to check spatial resolution compared with Step and Shoot Mode and Dynamic Continuous Mode. The second, the Hoffman 3D Phantom filled with Na⁹⁹ᵐTcO₄ 74 MBq was acquired for 15 Frame/minutes to evaluate visual assessment and quantification. Finally, in the Deluxe Jaszczak phantom, Spheres and Rods were measured by MI Apps program as well as, checking counts with the frontal lobe, temporal lobe, occipital lobe, cerebellum and hypothalamus parts was performed in the Hoffman 3D Brain Phantom. Results In Brain SPECT Study, using Dynamic Continuous Mode rather than current Step and Shoot Mode, we can do the reading using the 20 to 50 % of the acquired image, and during the test if the patient moves, we can remove unneeded image to reduce the rate of restudy and reinjection. Conclusion Dynamic Continuous Mode in Brain study condition enhances effects compared to Step and Shoot Mode. And also is powerful method to reduce reacquisition rate caused by patient movement. The findings further indicate that it suggest rejection limit to maintain clinical value with certain reconstruction factors compared with Tomo data set. Further examination to improve spatial resolution, SPECT/CT should be the answer for that.

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키워드

SPECT Step and Shoot Mode(SSM) Dynamic Continuous Mode(DCM) Filtered Back Projection(FBJ) Iteration Reconstruction(IR)