We studied the influence of the radiographic procedure and joint positioning on knee joint space width (JSW) in 10 healthy volunteers, and the intrareader reproducibility of JSW measurements on radiographs performed 2 weeks apart using a standardized procedure. Results show that a 5 or 10 downward inclination of the X-ray beam and 15 or 30 of induced external foot rotation significantly reduced...

In this report, we discuss adaptive control of a space robot system with an attitude controlled base on which the robot is attached. We at first derive the system kinematic and dynamic equations based on Lagrangian dynamics and linear momentum conservation law. Using the dynamic model developed, we discuss the problem of linear parameterization in t m s of dynamic parameters, and have found tha...

We develop a new method for building a representation of an image from a library of basis elements that is facilitated by a joint adaptive space and frequency (JASF) graph. The JASF graph combines partitionable frequency expansion and spatial segmentation of the image, symmetrically. We demonstrate by using a rate-distortion framework for basis selection that the JASF graph improves compression...

BACKGROUND Psoriatic arthritis may progress to joint damage. Joint damage may be assessed clinically, by identifying deformed, fused, or flail joints, or radiologically, by recording erosions, joint space narrowing, ankylosis, lysis, or surgery. The relation between clinical and radiological damage is unclear. OBJECTIVE To study the ordering of clinical and radiological damage detection, and ...

OBJECTIVE To compare condylar position and morphology among different vertical skeletal patterns. METHODS Diagnostic cone-beam computed tomography images of 60 adult patients (120 temporomandibular joints) who visited the orthodontic clinic of Hallym University Sacred Heart Hospital were reviewed. The subjects were divided into three equal groups according to the mandibular plane angle: hypod...

INTRODUCTION Wear of polyethylene inserts plays an important role in failure of total knee replacement and can be monitored in vivo by measuring the minimum joint space width in anteroposterior radiographs. The objective of this retrospective cross-sectional study was to compare the accuracy and precision of a new model-based method with the conventional method by analysing the difference betwe...

Controllers for parallel manipulators can be designed in task space or joint space, each having its own advantages and disadvantages. In this paper, integral sliding mode controllers designed in joint space and in task space are compared using MATLAB simulation. In both cases, genetic algorithm is used to determine optimal sliding surface gain. The performance and robustness, smoothness of cont...

BACKGROUND The conventional technique for sacroiliac (SI) joint injection involves aligning the anterior and posterior aspects of the SI joint under fluoroscopic guidance and then entering the SI joint in the most caudal aspect. OBJECTIVE We wish to highlight that there is no added advantage to aligning both the anterior and posterior joint lines of the SI joint as it is time consuming, assoc...

This study has been performed to demonstrate the type and frequency of the anatomical variations of the sacroiliac joint according to age, gender, Body Mass Index and childbirth, and the influence of the anatomical variants to the uniformity and width of the joint space. It was conducted on 400 consecutive patients without sacroiliac complaint who underwent pelvic CT scanning for various reason...