Sarcopenia Detection System Using RGB-D Camera and Ultrasound Probe: System Development and Preclinical In-Vitro Test

Abstract

Sarcopenia is defined as muscle mass and strength loss with aging. As places, such as South Korea, Japan, and Europe have entered an aged society, sarcopenia is attracting global attention with elderly health. However, only few developed devices can quantify sarcopenia diagnosis modalities. Thus, the authors developed a sarcopenia detection system with 4 degrees of freedom to scan the human thigh with ultrasound probe and determine whether he/she has sarcopenia by inspecting the length of muscle thickness in the thigh by ultrasound image. To accurately measure the muscle thickness, the ultrasound probe attached to the sarcopenia detection system, must be moved angularly along the convex surface of the thigh with predefined pressure maintained. Therefore, the authors proposed an angular thigh scanning method for the aforementioned reason. The method first curve-fits the angular surface of the subject’s thigh with piecewise arcs using D information from a fixed RGB-D camera. Then, it incorporates a Jacobian-based ultrasound probe moving method to move the ultrasound probe along the curve-fitted arc and maintains radial interface force between the probe and the surface by force feedback control. The proposed method was validated by in-vitro test with a human thigh mimicked ham-gelatin phantom. The result showed the ham tissue thickness was maintained within approximately 26.01 ± 1.0 mm during 82° scanning with a 2.5 N radial force setting and the radial force between probe and surface of the phantom was maintained within 2.50 ± 0.1 N.

The Role of Casting Methods in Preserving Traditional Martial Arts through Motion Capture Technology

“…This technology enables the precise capture of intricate movements performed by skilled practitioners, resulting in accurate and detailed digital representations (Zhou et al, 2019). Motion capture systems utilize sensors and cameras to track markers on the body, ensuring high precision and fidelity in recording martial arts movements (Kim et al, 2015). The captured data preserves the subtleties and nuances of each technique, providing a comprehensive representation of the art form.…”

“…Traditional martial arts often involve dynamic and acrobatic movements that may pose challenges for motion capture systems. Fast-paced and complex motions, such as jumps, flips, and spins, can be difficult to capture accurately due to limitations in marker tracking and occlusion (Kim et al, 2015). These limitations may result in incomplete or distorted representations of the movements, affecting the fidelity of the preserved cultural heritage.…”

“…Furthermore, specialized equipment, including cameras, sensors, and software, is necessary for accurate data capture and processing. The expertise and resources required for motion capture may pose challenges in terms of accessibility, particularly for smaller organizations or cultural heritage institutions (Kim et al, 2015).…”

Portable Digital Monitoring System for Sarcopenia Screening and Diagnosis

“…Some technological systems to evaluate sarcopenia have been recently developed [ 42 , 43 , 44 , 45 ], but these are rarely available in the market and their validity has yet to be established. Although the presented system still uses manual anthropometric evaluations (i.e., body circumferences and skinfolds), which represents an important limitation amongst older adults because of their skin and fat tissue properties [ 46 ], anthropometric evaluations do have economic and time-consuming advantages compared with current lab methods (MRI, MRS, CT, and DXA).…”