Figure 4.

(Color online) Microparticle The images shown above illustrate the change of the integrated intensity of the CPS image signal after image processing steps were incrementally added: (a) MC, (b) MC + HP filter, (c) MC + HP + M&T filters, and (d) MC + HP + M&T + GM filters. In each image, the particle signal was rendered as a heat map overlaid on a grayscale B-mode background. Each heat map was normalized such that the brightest signal within each image appears white. The green arrow points to the tumor. As each image processing step was added from (a)–(d), the tumor signal became increasingly dominant relative to background tissue signal. MC: motion correction, HP: high-pass filter, M&T: median and threshold filter; GM: global motion filter.