A Computer-Aided Analysis Method of SPECT Brain Images for Quantitative Treatment Monitoring: Performance Evaluations and Clinical Applications

Figure 2

Comparisons of the image quality indexes for three-size lesions (8 mm: diameter of 8 mm, 16 mm: diameter of 16 mm, and 24 mm: diameter of 24 mm) at nine different change-rates (10% to 90%). (a) The normalized average error (NAE) for measuring the difference between the change-rate map (CRM) and its ground truth; (b) the peak signal-noise ratio (PSNR) for reflecting the image quality of the CRM; (c) the normalized cross-correlation (NCC) for quantifying the similarity between the CRM and its ground truth.

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(b)

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