Open NiklasTee opened 5 months ago
Hi, concerning 16 electrodes with 224 measurements, I see that your protocol is step=8 and meas=8, which means that current carrying electrodes are also been used for measurements, right?
May be you could try step=8 (opposition excitation) meas=1 (adjacent measures), and drop the measures on current carrying electrodes. 16 electrodes will yield 192 total measurements, which might be stable in this setting.
From my understanding, in step=8 and meas=8 the current carrying electrodes are not used for voltage measurement in the same set:
Current Emitting | Current Absorbing | Voltage Positive | Voltage Negative E01_E09_E02_E10 E01_E09_E03_E11 E01_E09_E04_E12 E01_E09_E05_E13 E01_E09_E06_E14 E01_E09_E07_E15 E01_E09_E08_E16 E01_E09_E10_E02 E01_E09_E11_E03 E01_E09_E12_E04 E01_E09_E13_E05 E01_E09_E14_E06 E01_E09_E15_E07 E01_E09_E16_E08
this repeats for the other 15 electrode pairs:
E02_E10_E01_E09 E02_E10_E03_E11 E02_E10_E04_E12 E02_E10_E05_E13 E02_E10_E06_E14 ...
I don't see a way to manipulate the collected data to arrive at a different configuration by dropping measures. Also, I am unable to rerun the experiment. Is there a reason why 224 measurements tends to be unstable?
First of all thanks for the project!
I collect real world data using a 16 electrode belt wrapped around the pelvic (bladder monitoring). Measurements are taken in opposition schema resulting in a DataFrame with 448 columns (224 for each Magnitude and Phase) like this:
E01_E09_E02_E10_Magnitude | E01_E09_E02_E10_Phase | E01_E09_E03_E11_Magnitude | E01_E09_E03_E11_Phase | -- | E16_E08_E14_E06_Magnitude | E16_E08_E14_E06_Phase | E16_E08_E15_E07_Magnitude | E16_E08_E15_E07_Phase
The electrodes are not spaced equally around the pelvic, but with vacancy above the pubic bone due to hardware design:
This is the code I am using for reconstruction:
Reconstruction runs through, but the results are not as expected. Even when validating the hardware on an agar-agar phantom, I found the algorithm struggling with the electrode position (results are better when assuming a equally spaced electrode arrangement, but still not as expected):
Am I missing something, or is the combination of opposition schema with custom electrode arrangement just not suitable?