Table 2.
Configuration of elastography system and image segmentation.
| Articles | Mode | Type | System | Processing and Segmentation |
|---|---|---|---|---|
| Hu et al. [48] | US | SWE + B-mode |
ACUSON Sequoia Redwood US diagnostic system (Siemens, Munich, Germany) | Use PP-LiteSeg to segment SWE by B-mode |
| Pereira et al. [49] | US | SWE + B-mode | - | Segmented SWE region with stress corresponding to 0.7 max stress value |
| Qin et al. [50] | US | SWE + B-mode | Aixplorer ultrasonic machine | Pre-extracted ROI by color channel transformation and segmented by radiologists |
| Săftoiu et al. [51] | US | EUS, SE + B-mode | HITACHI 8500 (Hitachi Medical Systems, Zug, Switzerland) Pentax Linear Endoscope EG3830UT and EG3870 UTK (Pentax, Hamburg Germany) |
Processed using ImageJ software to extract hue histogram matrix. Manual selection or tumor area |
| Săftoiu et al. [52] | US | EUS | - | Processed using a special software plugin based on ImageJ software to extract hue histogram matrix. Manual selection or tumor area. |
| Sun et al. [53] | US | SWE + B-mode | - | ROI manually segmented using ITK-SNAP Denoise with Median Filter and outlined by radiologists. |
| Udriștoiu et al. [54] | US | EUS, SE, Doppler | HITACHI Preirus EG3870UTK, Pentax Medical Corporation |
Contrast enhancement, ROI manual segmentation |
| Zhang et al. [55] | US | SE + B-mode | HI Vision 900, HI Vision Ascendus, HI Vision Preirus color US units from Hitachi (Tokyo, Japan) | Conducted by experienced radiologist |
| Zhao et al. [56] | US | SE + B-mode | HITACHI Vision 900 system (Hitachi Medical System, Tokyo, Japan), - | - |
| B-mode | Philips iu222 (Philips, Bothell, WA, USA) | |||
| Zhao et al. [57] | US | SWE + B-mode | Aixplorer; Supersonic Imagine (Paris, France), SWE | ROI extracted by Q-Box quantification tool |
| Zhou et al. [58] | US | - | - | Contrast enhancement |
EUS: endoscopic ultrasound; ROI: region of interest; SE: strain elastography; SWE: shear-wave elastography; US: ultrasound.