Active contours with prior corner detection to extract discontinuous boundaries of anatomical structures in X-ray images

2015 ◽  
Vol 9 (3) ◽  
pp. 202-210 ◽  
Author(s):  
Aruni U.A. Niroshika ◽  
Donna K.S. Kannangara ◽  
Ravindra S. Lokupitiya ◽  
Ravinda G.N. Meegama
Keyword(s):  
Active Contours ◽  
Corner Detection ◽  
Anatomical Structures ◽  
X Ray

Multimodal Retinal Image Registration for Optic Disk Segmentation

2004 ◽  
Vol 43 (04) ◽  
pp. 336-342 ◽  
Author(s):  
M. Skokan ◽  
L. Kubečka ◽  
M. Wolf ◽  
K. Donath ◽  
J. Jan ◽  
...  
Keyword(s):  
Nonlinear Filtering ◽  
Active Contours ◽  
Optic Disk ◽  
Scanning Laser ◽  
Morphological Operations ◽  
Anatomical Structures ◽  
Glaucoma Diagnosis ◽  
Laser Tomography ◽  
Canny Edge ◽  
Fundus Photographs

Summary Objectives: The analysis of the optic disk morphology with the means of the scanning laser tomography is an important step for glaucoma diagnosis. A method we developed for optic disk segmentation in images of the scanning laser tomograph is limited by noise, nonuniform illumination and presence of blood vessels. Inspired by recent medical research, we wanted to develop a tool for improving optic disk segmentation by registration of images of the scanning laser tomograph and color fundus photographs and by applying a method we developed for optic disk segmentation in color fundus photographs. Methods: The segmentation of the optic disk for glaucoma diagnosis in images of the scanning laser tomograph is based on morphological operations, detection of anatomical structures and active contours and has been described in a previous paper [1]. The segmentation of the optic disk in the fundus photographs is based on nonlinear filtering, Canny edge detector and a modified Hough transform. The registration is based on mutual information using simulated annealing for finding maxima. Results: The registration was successful 86.8% of the time when tested on 174 images. Results of the registration have shown a very low displacement error of a maximum of about 5 pixels. The correctness of the registration was manually evaluated by measuring distances between the real vessel borders and those from the registered image. Conclusions: We have developed a method for the registration of images of the scanning laser tomograph and fundus photographs. Our first experiments showed that the optic disk segmentation could be improved by fused information from both image modalities.

Ulnar corner

2018 ◽  
Author(s):  
David Warwick
Keyword(s):  
Anatomical Structures ◽  
X Ray ◽  
Hypothenar Hammer Syndrome ◽  
Ulnar Head ◽  
Traumatic Lesions ◽  
Surgical Options ◽  
Hook Of Hamate ◽  
Hamate Fracture ◽  
Excision Arthroplasty ◽  
Operative Measures

The ulnar corner is complex with many anatomical structures and many potential pathologies. This may render diagnosis and treatment a challenge. Meticulous history taking and examination are required, supplemented, if necessary, by tests such as X-ray, MRI, and arthroscopy. Condition include ECU and FCU tendinopathy; hook of hamate fracture; carpal instability; osteoarthritis of the DRUJ, pisotriquetral joint and lunatehamate joint; degenerative and traumatic lesions of the TFCC; ulnar neuropathy, and hypothenar hammer syndrome. Successful treatment depends on accurate diagnosis; non-operative measures usually suffice but surgical options include excision arthroplasty (e.g. pisiform arthritis), joint replacement (e.g. ulnar head), neurolysis (e.g. ulnar nerve neuropathy), surgical debridement (e.g. TFCC central perforations and lunate–hamate arthritis), and ulnar shortening (ulnocarpal impaction).

Design of corner detection used for calibration of x-ray device

2000 ◽  
Author(s):  
Jianfeng Lu ◽  
Xuelei Hu ◽  
Jingyu Yang ◽  
Yukun Ye ◽  
Dong Wang
Keyword(s):  
Corner Detection ◽  
X Ray

scholarly journals Modern concepts of constitutional and X-ray anatomy of the chest in adolescents and adults

2021 ◽  
Vol 6 (3) ◽  
pp. 4-7
Author(s):  
Elena D. Lutsay ◽  
Aleksandr G. Shekhtman ◽  
Anatolii V. Volodin ◽  
Tatyana A. Alekseeva
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Scientific Data ◽  
Anthropometric Parameters ◽  
Anatomical Structures ◽  
X Ray ◽  
Chest Cavity ◽  
Size And Shape ◽  
Surgical Access ◽  
Adolescents And Adults

The review presents the analysis of domestic and foreign literature, selecting the available scientific data on the features of constitutional and X-ray anatomy of the chest in adolescents and adults. The size and shape of the chest depends on age, sex and anthropometric parameters: height, body mass index, and also the presence of concomitant pathology. These patterns are characteristic of individual anatomical structures of the chest: sternum, ribs, spine and diaphragm. The study of constitutional anatomy is necessary for the development of morphological foundations for the interpretation of the results of intravital imaging of the chest and organs, justification of various methods of surgical access to the organ and structures of the chest and chest cavity.

Sign in / Sign up

Export Citation Format

Share Document