Thickness precision measurement method of sheath and insulation materials based on image processing

Abstract

Subpixel is a key technology of image processing technology. It can achieve positioning better than entire pixel precision to the target. Against the shortcoming of slow speed of general Zernike moment subpixel location method, proposed an improved Sobel-Zernike moment positioning method in the software algorithms of sheath and insulation materials thickness image measurement system, improved the edge point criterion and the edge subpixel coordinates formula, optimized the edge of a single pixel contour, achieved precise and rapid measurements, and the experiment display is faster than 80%.

Clinical Analysis of Transbronchial Cryobiopsy in Diagnosis of Diffuse Lung Disease

“…According to one study [9], the rates of obtaining a diagnosis via transbronchial or percutaneous lung biopsy are statistically comparable at ~ 25%, while the corresponding rate for surgical lung biopsy is signi cantly higher (~ 98.7%). In the present study, diagnoses were obtained for 91.2% of the patients who underwent TBCB, that is, a lower rate obtained by surgical lung biopsy but higher than that of either transbronchial or percutaneous lung biopsy reported previously [7,9].…”

“…Thoracentesis or drainage was performed in those with moderate pneumothorax, while persistent pneumothorax did not occur. Cascante et al [7,16] reported similar results. Other studies have reported that complications such as postoperative infection, empyema, respiratory failure, short-term DLD exacerbation, and postoperative death are uncommon or rare [9,17,18], and these did not occur in our subjects.…”

“…A second reason for the much higher diagnostic rate of TBCB relative to transbronchial or percutaneous lung biopsies is that, in TBCB, the sample may contain many small airways that can facilitate the evaluation of suspected bronchiolitis. Furthermore, in cryobiopsy, freezing usually does not change lung structure [7,11] but will decrease compression and deformation, and the specimen quality is better.…”

“…Rapid advances in TBCB in recent years have allowed its gradual acceptance as a diagnostic method for DLD, and an alternative to surgical lung biopsy [3,7]. However, the various guidelines have yet to provide clear recommendations for TBCB.…”

“…The gold standard for diagnosis of DLD is surgical lung biopsy [2,3], but this is usually not used in clinical practice due to the associated high risks and cost [3][4][5]. Alternatives include transbronchial lung biopsy and percutaneous lung biopsy, but each has shortcomings such as low tissue sample size, poor quality, and inability to satisfy pathological diagnosis [5][6][7].…”