Fig. 1
From: A new method to predict refracture risk after locking compression plate removal of clavicle shaft
Measurement method of mean gray value of screw hole. A: preoperative X-ray of patient. B. postoperative X-ray of patient. C: Images were treated using Image J software, mean gray value of screw holes (yellow line) and marginal normal bone tissue (blue line) were measured by “straight or freehand line” measurements. D: refracture at the screw hole (white arrow)