The predictive value of transcranial duplex sonography for the clinical diagnosis in undiagnosed parkinsonian syndromes: comparison with SPECT scans

Table 3 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)	6^a	15^c
SN-TCD negative (= normal)	3^b	8^d

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

ISSN: 1471-2377