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논문 기본 정보

자료유형
학술저널
저자정보
Ko, In OK (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Science) Park, Ji Ae (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Science) Lee, Won Ho (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Science) Lim, Sang Moo (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Science) Kim, Kyeong Min (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Science)
저널정보
대한방사성의약품학회 대한방사성의약품학회지 대한방사성의약품학회지 제1권 제2호
발행연도
2015.1
수록면
130 - 136 (7page)

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초록· 키워드

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We evaluate the influence of MR contrast agent on positron emission tomography (PET) image using phantom, animal and human studies. Phantom consisted of 15 solutions with the mixture of various concentrations of Gd-based MR contrast agent and fixed activity of [$^{18}F$]FDG. Animal study was performed using rabbit and two kinds of MR contrast agents. After injecting contrast agent, CT or MRI scanning was performed at 1, 2, 5, 10, and 20 minutes. PET image was obtained using clinical PET/CT scan, and attenuation correction was performed using the all CT images. The values of HU, PET activity and MRI intensity were obtained from ROIs in each phantom and organ regions. In clinical study, patients (n=20) with breast cancer underwent sequential acquisitions of early [$^{18}F$]FDG PET/CT, MRI and delayed PET/CT. In phantom study, as the concentration increased, the CT attenuation and PET activity also increased. However, there was no relationship between the PET activity and the concentration in the clinical dose range of contrast agent. In animal study, change of PET activity was not significant at all time point of CT scan both MR contrast agents. There was no significant change of HU between early and delayed CT, except for kidney. Early and delayed SUV in tumor and liver showed significant increase and decrease, respectively (P<0.05). Under the condition of most clinical study (< 0.2 mM), MR contrast agent did not influence on PET image quantitation.

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