Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Ishikawa, T. et al.

Comparative nigrostriatal dopaminergic imaging with iodine-123-beta CIT-FP/SPECT and fluorine-18-FDOPA/PET.

SPECT imaging of the dopamine transporter is now an alternative to PET in the quantification of nigrostriatal dopaminergic function. We compared [123I] beta CIT-FP/SPECT and [18F]FDOPA/PET in the assessment of nigrostriatal dopaminergic function in Parkinson's disease (PD) and normal aging. METHODS: We studied 12 mildly affected PD patients (mean age: 61.0 +/- 13.2 yr; H&Y Stage I-II) with both [123I] beta CIT-FP and [18F]FDOPA. Fifteen normal volunteers (mean age: 45.5 +/- 22.1 yr) served as controls for both tracers. We measured the striato-occipital ratio (SOR) for both tracers at approximately 100 min postinjection. RESULTS: We found a highly significant correlation between SOR measures obtained for both tracers (r = 0.79, p < 0.0001). In normal volunteers a significant age-related decline in striatal uptake was noted with [123I] beta CIT-FP (r = -0.56, p < 0.04) but not with [18F]FDOPA. SOR values for both tracers discriminated PD patients from controls with comparable accuracy (F[1,25] = 52.1 and 53.0, p < 0.0001 for [123I] beta CIT-FP and [18F]FDOPA, respectively). UPDRS motor ratings correlated with SOR values obtained by both imaging techniques (r = -0.69 and -0.60, p < 0.04 for [123I] beta CIT-FP and [18F]FDOPA, respectively). CONCLUSION: These results indicate that [123I] beta CIT-FP/SPECT can provide quantitative descriptors of presynaptic dopaminergic function comparable to those obtained with [18F]FDOPA/PET.[1]

References

Comparative nigrostriatal dopaminergic imaging with iodine-123-beta CIT-FP/SPECT and fluorine-18-FDOPA/PET. Ishikawa, T., Dhawan, V., Kazumata, K., Chaly, T., Mandel, F., Neumeyer, J., Margouleff, C., Babchyck, B., Zanzi, I., Eidelberg, D. J. Nucl. Med. (1996) [Pubmed]

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