Abstract
In medical diagnostics visual evaluation of an object or its image is necessary but time consuming operation. Well-known computer vision algorithms or their compilation, or even some new methods should be the right tool in increasing the speed and reliability of this process. This paper introduces situation in this domain and some experiments and their results in extraction of biomechanical parameters of human pelvis from x-ray images using combination of Hough transform for a line, for a circle (arc) and Canny edge detector. The main idea of an algorithm, which was created during this experiment, is to use different levels of noise filter thus making a balance between leaving too much noise and removing too much actual data. The basic steps would be: filter out most of noise and noisy objects using high filter’s threshold value; find sharp and clear objects; narrow the set of possible parameters of noisy objects; apply noise filter with lower threshold value to the original image; find noisy objects. Experiment shows that algorithm works but it needs to be tested on reliability and some bindings with actual biomechanical parameters should be done (see [1–6]).
Highlights
Contemporary medical diagnostics explores intensively visual evaluation of medical images, signals or other complicated objects
Different dysfunctions of an acetabulofemoral joint which result in pain and/or motility restrictions are important factors determining a person’s quality of life
Around 10% of patients over 85 years of age suffer from a degenerative acetabulofemoral joint disease and according to the data of different studies, the occurrence of congenital joint dislocation among newborns due to insufficient development ranges from 3% to 7.5% of all cases
Summary
Contemporary medical diagnostics explores intensively visual evaluation of medical images, signals or other complicated objects. Different dysfunctions of an acetabulofemoral joint which result in pain and/or motility restrictions are important factors determining a person’s quality of life Such dysfunction may be congenital, caused by trauma or joint operation conditions (such as long-term joint strain c Vilnius University, 2011 exceeding joint stress limits due to obesity, hard physical work, uncomfortable body position or repeated movements), natural wear on joints or may be a result of other pathologies. Establishment of pathological diagnoses in the pelvic area (such as dysplasia, arthrosis, dislocation or fracture) and selection of treatment methods relies on a number of methods based on calculations involving biomechanical parameters of objects under analysis. These parameters can be conveyed in geometrical expressions: points, distances among objects, positions of objects to each other and angle formations. Additional diagnostic methods, if necessary (computed tomography, radioisotope bone scan, ultrasound testing, magnetic resonance imaging, arthroscopy)
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