The majority of patients with Crohn's disease and a proportion of patients with ulcerative colitis will ultimately require surgical treatment despite advances in diagnosis, therapy, and endoscopic interventions. The surgical procedures that are most commonly done include bowel resection with anastomosis, strictureplasty, faecal diversion, and ileal pouch. These surgical treatment modalities result in substantial alterations in bowel anatomy. In patients with inflammatory bowel disease, endoscopy plays a key role in the assessment of disease activity, disease recurrence, treatment response, dysplasia surveillance, and delivery of endoscopic therapy. Endoscopic evaluation and management of surgically altered bowel can be challenging. This consensus guideline delineates anatomical landmarks and endoscopic assessment of these landmarks in diseased and surgically altered bowel.

• MeSH
• anastomóza chirurgická metody   MeSH
• anatomická značka diagnostické zobrazování   MeSH
• chirurgie trávicího traktu škodlivé účinky   MeSH
• Crohnova nemoc diagnóza   chirurgie   MeSH
• dospělí MeSH
• endoskopie metody   MeSH
• idiopatické střevní záněty chirurgie   MeSH
• konsensus MeSH
• lidé středního věku MeSH
• lidé MeSH
• pouch škodlivé účinky   MeSH
• proktokolektomie rekonstrukční metody   MeSH
• recidiva MeSH
• směrnice pro lékařskou praxi jako téma MeSH
• stenóza chirurgie   MeSH
• střeva anatomie a histologie   patologie   chirurgie   MeSH
• stupeň závažnosti nemoci MeSH
• ulcerózní kolitida diagnóza   chirurgie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• přehledy MeSH
• Research Support, N.I.H., Extramural MeSH

The purpose of this study is (1) to introduce a new approach for edge detection in orthopantograms (OPGs) and an improved automatic parameter selector for common edge detectors, (2) to present a comparison between our novel approach with common edge detectors and (3) to provide faster outputs without compromising quality. A new approach for edge detection based on statistical measures was introduced: (1) a set of N edge detection results is calculated from a given input image and a selected type of edge detector, (2) N correspondence maps are constructed from N edge detection results, (3) probabilities and average probabilities are computed, (4) an overall correspondence is evaluated for each correspondence map and (5) the correspondence map providing the best overall correspondence is taken as the result of edge detection procedure. A comparison with common edge detectors (the Roberts, Prewitt, Sobel, Laplacian of the Gaussian and Canny methods) with various parameter settings (304 combinations for each test image) was carried out. The methods were assessed objectively [edge mismatch error (EME), modified Hausdorff distance (MHD) and principal component analysis] and subjectively by experts in dentistry and based on time demands. The suitability of the new approach for edge detection in OPGs was confirmed by experts. The current conventional methods in edge detection in OPGs are inadequate (none of the tested methods reach an EME value or MHD value below 0.1). Our proposed approach for edge detection shows promising potential for its implementation in clinical dentistry. It enhances the accuracy of OPG interpretation and advances diagnosis and treatment planning.

• Klíčová slova
• computer-assisted image processing, medical imaging, panoramic radiography,
• MeSH
• algoritmy MeSH
• analýza hlavních komponent MeSH
• anatomická značka diagnostické zobrazování   MeSH
• artefakty MeSH
• časové faktory MeSH
• cysty čelistí diagnostické zobrazování   MeSH
• extrakce zubů MeSH
• lidé MeSH
• normální rozdělení MeSH
• počítačové zpracování obrazu statistika a číselné údaje   MeSH
• pravděpodobnost MeSH
• rentgendiagnostika panoramatická statistika a číselné údaje   MeSH
• rentgenový obraz - interpretace počítačová metody   MeSH
• zubní kaz diagnostické zobrazování   MeSH
• zuby přespočetné diagnostické zobrazování   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• srovnávací studie MeSH