Fig. 1.

Results screen of the quantitative parameters of CEH-EUS for leiomyoma and high-risk GIST of the stomach. The small reference region of interest (ROI) defines the baseline for quantitative analysis in the center of the CEH-EUS image, and the large ROI marks the hotspot in the enhanced tumor for (A) leiomyoma and (B) high-risk GIST. Time-intensity curves of the large ROI for the quantitative parameter “peak enhancement” for (C) leiomyoma and (D) high-risk GIST.

CEH-EUS, contrast-enhanced harmonic endoscopic ultrasonography; GIST, gastrointestinal stromal tumor; a.u., arbitrary units.