The developmental goal of 3D ultrasound imaging (3DUS) is to engineer a modality to perform 3D morphological ultrasound analysis of human muscles. 3DUS images are constructed from calibrated freehand 2D B-mode ultrasound images, which are positioned into a voxel array. Ultrasound (US) imaging allows quantification of muscle size, fascicle length, and angle of pennation. These morphological vari...

Introduction Changes in muscle geometry such as muscle thickness, pennation angle and fascicle length occur with muscle contraction (Herbert and Gandevia, 1995; Fukunaga et al., 1997; Ito et al., 1998; Kawakami et al., 1998; Maganaris and Baltzopoulos, 1999). These changes can be measured using computerised sonography and could potentially provide a measure of muscle 'activity'. This study inve...

Baptista R, Onzi E, Goulart N, Dos Santos LD, Makarewicz G, Vaz M. Effects of Concentric Versus Eccentric Strength Training on the Elderly’s Knee Extensor Structure and Function. JEPonline 2016;19(3):120-132. The purpose of this study was to compare the effects of eccentric vs. concentric 12-wk strength training program on the quadriceps properties of elderly men. Twenty-three subjects performe...

The trajectories of skeletal muscle fascicles are critical to their function, and many skeletal muscles across the body have fascicles with highly complex trajectories. Architectural descriptions of muscles account for fascicle trajectories by reporting parameters such as fascicle length, physiological cross-sectional area, and pennation angle. These parameters are typically reported as constan...

The purpose of this study is to compare the ultrasonographic architectural properties of muscles and balance ability based on the muscle contraction of chronic stroke patients. The subjects of this study were 30 chronic stroke patients were divided into 3 classes based on the Modified Ashworth Scale (MAS), with 10 patients in each class. Ultrasonographic architectural properties and balance abi...

Poststroke dorsiflexor weakness and paretic limb foot drop increase the risk of stumbling and falling and decrease overall functional mobility. It is of interest whether dorsiflexor muscle weakness is primarily neurological in origin or whether morphological differences also contribute to the impairment. Ten poststroke hemiparetic individuals were imaged bilaterally using noninvasive medical im...

PURPOSE To track the regeneration process of lateral gastrocnemius due to a muscle laceration in rats, and to treatment with plateletrich plasma (PRP). METHODS Ultrasound (40 MHz) images were used for measuring pennation angle (PA), muscle thickness (MT) and mean pixel intensity, along with claudication scores, of treated (PRPG) and non-treated (NTG) groups of rats. RESULTS NTG showed a PA ...

BACKGROUND No study relating the changes obtained in the architecture of erector spinae (ES) muscle were registered with ultrasound and different intensities of muscle contraction recorded by surface EMG (electromyography) on the ES muscle was found. The aim of this study was analyse the relationship in the response of the ES muscle during isometric moderate and light lumbar isometric extension...

The parameters of muscle ultrasound images reflect the function and state muscles. They are great significance to diagnosis diseases. Because manual labeling is time-consuming laborious, automatic image has become a research topic. In recent years, there have been many methods that apply processing deep learning automatically analyze images. However, these limitations, such as being non-automat...