Table 2. Quantification results of the methods adopted for synthetic measurements.

Methods	Sensitivity matrix size	Reconstruction time (s)	Regularization parameter
Full data	46,128 × 28,830	2,942	0.016
After SNR filter (threshold = 2.02)	27,869 × 28,830	2,100	0.753
After CNR filter (threshold = 7.5)	24,025 × 28,830	1,896	0.005
After PCA reduction (CPV = 95.8%)	35,000 × 28,830	1,937	0.259
After SNR, CNR filter (threshold of SNR = 2.0/CNR = 6.5)	37,479 × 28,830	2,178	0.896
After SNR, CNR filter & PCA (threshold of SNR = 2.0/CNR = 6.5/CPV = 95%)	28,123 × 28,830	1,484	0.001