- Volume 9 Issue 1
DOI QR Code
Evaluation of metabolic tumor volume using different image reconstruction on 18F-FDG PET/CT fusion image
18F-FDG PET/CT 융합영상에서 영상 재구성 차이에 의한 MTV (Metabolic tumor volume) 평가
- Yoon, Seok Hwan (Department of Nuclear Medicine, Seoul National University Hospital)
- 윤석환 (서울대학교병원 핵의학과)
- Received : 2017.11.26
- Accepted : 2018.01.20
- Published : 2018.01.28
Recently, MTV(metabolic tumor volume) has been used as indices of the whole tumor FDG uptake on FDG PET image but it is influenced by image reconstruction. The purpose of this study was to evaluate the correlation between actual volume and metabolic tumor volume applying different SUVmax threshold for different reconstruction algorithm on phantom study. Measurement were performed on a Siemens Biograph mCT40 using a NEMA IEC body phantom containing different size six spheres filled with F18-FDG applying four SBRs (4:1, 8:1, 10:1, 20:1). Images reconstructed four algorithms (OSEM3D, OSEM3D+PSF, OSEM3D +TOF, OSEM3D+TOF+PSF) and MTV were measured with different SUVmax threshold. Overall, the use of increasing thresholds result in decreasing MTV. and increasing the signal to background ratio decreased MTV by applying same SUVmax threshold. The 40% SUVmax threshold gave the best concordance between measured and actual volume in PSF and PSF+TOF reconstruction image. and the 45% threshold had the best correlation between the volume measured and actual volume in OSEM3D and TOF reconstruction image. we believe that this study will be used when the measurement of MTV applying various reconstruction image.
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