PURPOSE To propose and test the feasibility of a novel method for quantifying 3D regional pulmonary kinematics from hyperpolarized helium-3 tagged MRI in human subjects using a tailored image processing pipeline and a recently developed nonrigid registration framework. MATERIALS AND METHODS Following image acquisition, inspiratory and expiratory tagged (3)He magnetic resonance (MR) images wer...

New motor rehabilitation therapies include virtual reality (VR) and robotic technologies. In limb rehabilitation, limb posture is required to (1) provide a limb realistic representation in VR games and (2) assess the patient improvement. When exoskeleton devices are used in the therapy, the measurements of their joint angles cannot be directly used to represent the posture of the patient limb, ...

OBJECTIVES The assessment of spinal reflexes has traditionally been performed by clinicians with minimal need for recording equipment, where doctors rely on their training and may use established subjective reflex rating scales. With advances in technology, it is now possible to assess reflexes objectively. This study compared two objective methods of assessing patellar reflex magnitude, durati...

Analyzing human poses with a Kinect is a promising method to evaluate potentials risks of musculoskeletal disorders at workstations. In ecological situations, complex 3D poses and constraints imposed by the environment make it difficult to obtain reliable kinematic information. Thus, being able to predict the potential accuracy of the measurement for such complex 3D poses and sensor placements ...

The analysis of surgical motion has received a growing interest with the development of devices allowing their automatic capture. In this context, the use of advanced surgical training systems make an automated assessment of surgical trainee possible. Automatic and quantitative evaluation of surgical skills is a very important step in improving surgical patient care. In this paper, we present a...

We present an analysis of the spatial covariance structure of an articulated motion prior in which joint angles have a known covariance structure. From this, a well-known, but often ignored, deficiency of the kinematic skeleton representation becomes clear: spatial variance not only depends on limb lengths, but also increases as the kinematic chains are traversed. We then present two similar Ga...

The aim of this study was based on the kinematic parameters, extracted at different stages of performing a forward handspring to determine the interconnection of methodological procedures of learning with the final structure of the movement. The respondent is an active competitor with years of experience, elite athlete, many times Croatian champion, and competitor at European, World Championshi...

OBJECTIVE To validate a protocol assessing upper limb kinematics using a planar robot among stroke patients. DESIGN Prospective cohort study. SUBJECTS Age-matched healthy subjects (n = 25) and stroke patients (n = 25). METHODS Various kinematic indices (n = 44) were obtained from 4 tasks performed by subjects with REAplan, a planar end-effector robotic device. The metrological properties ...

We calculate the shape of the photon spectrum for B → Xs + γ decay in the presence of a background chromomagnetic field for the case of SU(2) gauge group. The effect of the external field resembles the Zeeman effect the parton model peak is split into two slightly assymetric peaks, located around the kinematic endpoint. We investigate the analytic properties of the spectrum and calculate the to...