Subtraction of aligned images is a means to assess changes in a wide variety of clinical applications. In this paper we explore the information theoretical origin of Mutual Information (MI), which is based on Shannon's entropy. However, the interpretation of standard MI registration as a communication channel suggests that MI is too restrictive a criterion. In this paper the concept of Mutual I...

A group of small-for-dates full-term babies whose intra-uterine growth was followed by serial ultrasonic cephalometry were examined at a mean age of 4 years. Those children whose skull growth had begun to slow in utero before 34 weeks' menstrual age were more likely to have a height and weight less than the 10th centile. When the onset of growth failure had occurred before 26 weeks there was a ...

In this paper we model shape objects variability and spatial relationships between characteristics of this object. What is an object? We consider that an object is a set of shapes and points. We establish here a formalism unifying shapes and points by approximating shape contours by composite Bézier curves. These are equivalent to their control points. We then propose a non linear invariant sta...

The case of a 40-year-old male patient with obstructive sleep apnea syndrome (OSAS) is reported, with emphasis on treatment with a dental appliance. This therapeutic approach, which has been focused on recent research, has as its objective, the posturing of the mandibule and, consequently, the tongue more anteriorly, thus in turn leading to an increase in the posterior oropharyngeal airway spac...

This book represents the first single volume in the English language dealing with procedures aimed at the accurate measuring of the female pelvis and the fetal head in utero. Because of the unreliability of the usual external pelvic measurements the obstetrical studies of recent years have tended to neglect this fundamental part of obstetrics. Indeed, until the advent of the Roentgen mensuratio...

Background: Unusual enlargement of nasopharynx can disrupt air flow through the nose. The aim of this study was to investigate the cephalometric parameters in the upper airways. Methods: This retrospective descriptive study was conducted on 32 adults with Class II malocclusion without the history of night apnea in Qazvin. The radiographs were obtained from the...

OBJECTIVES The study aims to better understand the reappearance of sleep apnoea in adolescents considered cured of obstructive sleep apnoea (OSA) following adenotonsillectomy and orthodontic treatment. STUDY DESIGN The study employs a retrospective analysis of 29 adolescents (nine girls and 20 boys) with OSA previously treated with adenotonsillectomy and orthodontia at a mean age of 7.5years....