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. 2020 Aug 4;14:216. doi: 10.3389/fncel.2020.00216

FIGURE 4.

FIGURE 4

Correlation analysis between different qualification standards of dopaminergic neuron survival and substantia nigra hyperechogenicity (SNH) in Parkinson’s disease (PD). (A) Correlation analysis between optical density (OD) values of TH-ir cells and maximum SNH area under transcranial sonography (TCS). P = 0.0007, r = –0.7762, R2 = 0.6025, F = 19.7. (B) Correlation analysis between TH-ir cell numbers and maximum SNH area under TCS. P = 0.0296, r = –0.5611, R2 = 0.3148, F = 5.972. (C) Correlation analysis between OD values of TH-ir cells and mean gray values of substantia nigra (SN) under TCS. P = 0.0045, r = –0.6893, R2 = 0.4752, F = 11.77. (D) Correlation analysis between TH-ir cell numbers and mean gray values of SN under TCS. P = 0.8089, r = 0.06829, R2 = 0.004664, F = 0.06092.