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Contingency of the 32 patients who underwent both SN-TCD and postsynaptic SPECT imaging
| Total number of patient n = 32 | postsynaptic SPECT abnormal | postsynaptic SPECT normal |
| SN-TCD positive (= abnormal) | 6a | 15c |
| SN-TCD negative (= normal) | 3b | 8d |
SN substantia nigra, TCD transcranial duplex, SPECT Single Photon Emission Computer Tomography
a: IPD 2, APS 2, inconclusive 2
b: IPD 2, APS 1
c: IPD 13, APS 1, inconclusive 1
d: IPD 4, VP 3, 1 restgroup
