Internet of Things-Based Ultrasound-Guided Erector Spinae Plane Block Combined with Edaravone Anesthesia in Thoracoscopic Lobectomy

Figure 7

Ultrasonic edge detection of lungs. (a) The original image; (b) the image contaminated by noise; (c–e) edge detection and image processing of Canny operator, Prewitt operator, and Soble operator, respectively.

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(b)

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