Novel algorithm for the hemiplegic gait evaluation using a single 3-axis accelerometer.

This paper suggests the novel algorithm for the estimating gait parameters of the hemiplegic patients using a 3-axis accelerometer. The signal processing for algorithm consists of a bandpass filter and a least square acceleration filter. To evaluate the performance of the algorithm, the correlation coefficients of the stride and the step time between the 3-axis accelerometer and the Vicon motion analysis system are compared. In consequence, correlation coefficient ranged from 0.90 to 0.99 for patients and ranged from 0.92 to 0.99 for normal subjects. The results showed that the novel algorithm is very useful for estimating not only hemiplegic gait but also normal gait.

Thyroid dimensions of Korean adults on routine neck computed tomography and its relationship to age, sex, and body size.

The purpose of this study was to establish a "normal" range of dimensions of the thyroid gland on routine neck computed tomography in the Korean population and to investigate the possible influence of some physiological factors on the thyroid dimension. Neck computed tomography scans of 100 adults (57 males, 43 females; mean age=55.2 years) were reviewed retrospectively to measure the size of the thyroid gland and to evaluate its relationship to the trachea and cervical vertebra. For right and left lobes, the mean width was 15.7+/-2.6 mm and 15.2+/-3.1 mm, the mean thickness was 20.9+/-3.4 mm and 18.9+/-3.4 mm, the mean length was 61.8+/-8.6 mm and 58.5+/-8.3 mm, the mean estimated volume of each lobe was 8.8+/-3.1 cm(3) and 7.6+/-3.0 cm(3), respectively. The mean volume of total thyroid glands (including isthmus) was 17.5+/-6.6 cm(3). There was no significant difference between the total study group and the normal thyroid function group. The dimensions of the right lobe were significantly larger that those of the left. There was no significant difference between males and females. In multiple regression analysis, it was likely that the influence of body weight on the thyroid dimension was most pronounced. Our study presents initial data for assessing the thyroid gland on neck computed tomography scans in Koreans, and thereby provides suitable limit values of normal thyroid glands.