- Shoulder Injury and Treatment
- Musculoskeletal pain and rehabilitation
- Mechanical Circulatory Support Devices
- Spine and Intervertebral Disc Pathology
- Dermatologic Treatments and Research
- Cardiac Arrest and Resuscitation
- Scoliosis diagnosis and treatment
- Prosthetics and Rehabilitation Robotics
- Muscle activation and electromyography studies
- Heart Rate Variability and Autonomic Control
- Soft Robotics and Applications
- Cardiovascular and exercise physiology
- Non-Invasive Vital Sign Monitoring
- Facial Rejuvenation and Surgery Techniques
- Surgical Simulation and Training
- Hemodynamic Monitoring and Therapy
- Spinal Fractures and Fixation Techniques
- Cardiac and Coronary Surgery Techniques
- Mass Spectrometry Techniques and Applications
- Skin Protection and Aging
- Acne and Rosacea Treatments and Effects
- Advanced Sensor and Energy Harvesting Materials
- Trauma Management and Diagnosis
- Medical Imaging and Analysis
- Sports injuries and prevention
Samsung (South Korea)
2023-2024
Seoul National University
2011-2023
Seoul National University Hospital
2015
Range of motion (ROM) measurements are essential for the evaluation and diagnosis adhesive capsulitis shoulder (AC). However, taking these using a goniometer is inconvenient sometimes unreliable. The Kinect (Microsoft, Seattle, WA, USA) gaining attention as new detecting device that nonintrusive easy to implement. This study aimed apply measure ROM in AC; we evaluated its validity by calculating agreement obtained with those assessed utility AC. Both shoulders 15 healthy volunteers affected...
Background/purpose Existing acne grading methods, which depend on overall impression, require a long training period and there is high degree of variability among raters, including trained dermatologists. The use lesion count provides fair reproducibility but the method time consuming. New technologies in photographic equipment software allow solutions to problem evaluation. This study was conducted develop automatic program evaluation its usefulness. Methods We made conditions optimize...
The process of cardiopulmonary resuscitation (CPR) involves various components that must be followed to deliver high quality CPR. While the commonly apply CPR for all ages from infant adult, there are several different suggestions such as two-thumb and two-finger However, comprehensive evaluation based on these has been difficult in absence proper tool. Here, we developed a new manikin-integrated, digital measuring system objectively estimates overall performance by evaluating individual one...
Heart rate variations are tracked using an RF Doppler signal by applying a reassigned joint time-frequency transform (RJTFT). In analysis, RJTFT improves the readability of heart on spectrogram and is continuously with it. To verify result, heartbeat was acquired from stationary human subject radar unit. The sensor operating at 2.45 GHz located distance 0.5 m subject. Using RJTFT, clearly extracted, thereby improved readability. A reference measured photoplethysmography (PPG) device compared...
Although minimally invasive surgery (MIS) affords several advantages compared to conventional open surgery, robotic MIS systems still have many limitations. One of the limitations is non-uniform gripping force due mechanical strings existing systems. To overcome this limitation, a surgical instrument with pneumatic system consisting compressor, catheter balloon, micro motor, and other parts developed. This study aims implement pitching/yawing joints using motors without based on...
Abstract Background and Objective: The robot-assisted automatic laser hair removal (LHR) system is developed to automatically detect any arbitrary shape of the desired LHR treatment area provide uniform irradiation designated skin area.For delivery energy, a unit commercial device, distance sensor, high-resolution webcam are attached at six axis industrial robot's end-effector, which can be easily controlled using graphical user interface (GUI). During treatment, provides real-time progress...
The uniform delivery of laser energy is particularly important for safe and effective hair removal (LHR) treatment. Although it necessary to quantitatively assess the spatial distribution delivered laser, spots are difficult trace owing a lack visual cues. This study proposes novel preclinic tool evaluate operator proficiency in LHR treatment applies this train novice operators compare two different techniques (sliding versus spot-by-spot).
Objective To compare optical motion capture system (MoCap), attitude and heading reference (AHRS) sensor, Microsoft Kinect for the continuous measurement of cervical range (ROM). Methods Fifteen healthy adult subjects were asked to sit in front camera with markers AHRS sensors attached body a room equipped camera. Subjects instructed independently perform axial rotation followed by flexion/extension lateral bending. Each movement was repeated 5 times while being measured simultaneously 3...
The ElectroMechanical Film (EMFi), a thin and flexible piezoelectric material, has been widely used as mechanical sensor or actuator. Especially in Biomedical Engineering field, many researchers have EMFi for measuring ballistocardiogram (BCG) which is signal caused by blood ejection from heart. However, previous methods required special equipments installed on chair bed to measure BCG. In this preliminary study, we designed patch type that can electrical simultaneously single unit....
Background We sought to validate the accuracy and assess efficacy of a newly developed electronic weight estimation device (ie, rolling tape) for paediatric estimation. Methods enrolled convenience sample children aged <17 years presenting our emergency department who volunteered participate in study. The children's heights weights were measured, three researchers estimated these values using tape Broselow at 5 min intervals. estimates researcher 1, 2 compared with measured values, mean...
Abstract Objective To develop a simple method of quantifying dynamic lumbar stability by evaluating postural changes the spine during wall plank‐and‐roll (WPR) activity while maintaining maximal trunk rigidity. Design A descriptive, exploratory research with convenience sample. Setting biomechanics laboratory tertiary university hospital. Participants Sixteen healthy young subjects (8 men and 8 women; 30.7 ± 6.8 years old) 3 patients (2 46 50 old; 1 woman 54 low back pain (LBP). Methods The...
Background Low back pain (LBP) has been linked to the degree of lumbar stability, but evaluating stability remained a challenge. Previous research shown that inertial sensors could be used quantify motor patterns during wall plank‐and‐roll (WPR) test, and LBP may cause deviations in movement from general observed healthy individuals. Objective To generalize WPR test individuals, analyze effect aging on test. Design A descriptive, exploratory with convenience sample. This study is registered...
Despite the importance of cardiorespiratory fitness, no practical method exists to estimate maximal oxygen consumption (VO₂max) without a specific exercise protocol. We developed an estimation model VO₂max, using activity energy expenditure (aEEmax) as new feature represent level physical activity. Electrocardiogram (ECG) and acceleration data were recorded for 4 days in 24 healthy young men, reference VO₂max levels measured test. aEE was calculated body weight, while heart rate (HR)...
To provide an alternative to conventional large-scale fitness equipment, we previously developed a soft passive wearable device for upper limb resistance exercises that utilized elastic exercise bands. However, the user was required manually adjust level of strength. In this paper, introduce novel constitutes cable-driven actuation control profiles. Our proposed allows generation isotonic force trajectories, similar those produced during dumbbell lifting, utilizing custom actuators. The...
The assessment of cardiopulmonary resuscitation (CPR) is important for training as well CPR related research to validate new method or confirm efficacy existing one. Infant CPR, in particular, has been received great attention due its controversy over appropriateness superiority between two different methods, two-finger (TF) and two-thumb (TT) suggested by the council. Accordingly, development tool that capable reliably investigating techniques become critical. One most challenging task...
The COVID-19 pandemic has changed the lifestyle of society and interest in health fitness greatly increased, accordingly. Recently, motorized devices that allow fine automatic adjustment resistance without physically changing applied weight have been released to market. In fact, these eased resistance-changing process. However, such are still not portable as they must be mounted on wall their control needs improved increase efficiency strength training. This study introduces a chair-shaped...