Patrik Gabor Rozsa

58535540700

Publications - 2

Heartbeat Estimation from Subtle Body Vibrations via Inertial Sensing

Patrik Gabor Rozsa Szilvia Nagy

Publication Name: 60th International Scientific Conference on Information Communication and Energy Systems and Technologies Icest 2025 Proceedings

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This paper presents a cost-conscious signal processing pipeline for detecting heartbeats from faint body vibrations using a single back-mounted inertial measurement unit (IMU). The system operates without ECG or PPG sensors, relying solely on accelerometer and gyroscope data. The pipeline is designed with the intent to run on lightweight edge-computing platforms, such as Raspberry Pi-class devices or even on a ESP32, while prioritizing energy efficiency and user-friendliness for extended battery-powered use. Preliminary validation against manually recorded heart rates demonstrates feasibility with limitations.

Open Access: Yes

DOI: 10.1109/ICEST66328.2025.11098443

On Applying Expert Knowledge for Spline-Based Segmentation of Liver on Computed Tomography Images

Melinda Kovacs Patrik Gabor Rozsa Szilvia Nagy

Publication Name: 2023 58th International Scientific Conference on Information Communication and Energy Systems and Technologies Icest 2023 Proceedings

Publication Date: 2023-01-01

Volume: Unknown

Issue: Unknown

Page Range: 21-24

Description:

The segmentation of the liver from the surrounding soft tissues between the ribs on a non-enhanced, arterial or delayed phase computed tomography image complicated, as the muscle and many other soft tissues have very similar X-ray attenuation to the liver, thus they manifest as similar intensity and similar pattern domains on the computed tomography images. However, if the anatomical setup of the human body and the location of the bones, that have much higher attenuation are taken into account, a sufficiently smooth and precise borderline can be drawn between the ribcage and the liver, that can be developed into a liver contour by successive erosion and active contour methods.

Open Access: Yes

DOI: 10.1109/ICEST58410.2023.10187395