| Abstrak/Abstract |
This study proposes a boundary sensor system for
Electrical Impedance Tomography (EIT) to estimate the swollen
area boundaries in legs affected by lymphedema. Lymphedema
imaging poses significant challenges in defining accurate bound-
ary geometry models, as conventional EIT systems often provide
imprecise geometric data. The proposed system utilizes a Time of
Flight (ToF) VL53L0X sensor mounted on a rotating platform,
enabling the capture of variable data points independently of
the number of sensors and thereby addressing the limitations of
traditional methods. The experimental setup involved testing the
VL53L0X ToF sensor for distance and angle variations, with the
sensor mounted on a platform driven by a stepper motor for pre-
cise angular positioning. Results revealed that the VL53L0X ToF
sensor consistently misread distances with a mean absolute error
of 32.0111 mm, and angle variations introduced a measurement
error percentage of 8.2%. The system exhibited an average base
platform rotation angle error of 0.65°, indicating precise angular
shifts. Overall, the ToF VL53L0X-based boundary sensor system
successfully estimated non-homogeneous body boundary shapes
with an error percentage of 3.9751%. These findings suggest that
while there is room for improvement in sensor accuracy, the
proposed method provides a cost-effective and accurate means
of obtaining geometric data, enhancing EIT imaging for better
lymphedema diagnosis and monitoring. |
