Project: Anschutz (80 OPM sensors)
Subject: Enzo
Subject ID: Enzo1
Date: December 23, 2021
Paradigm: Dry Phantom

Dry Phantom Paradigm
1 kOkm resistor - 32 Hz sine wave
1 V Amplitude: One Dipole at a time: 1.01 - 1.16; 30 sec each
0.1 V Amplitude: One Dipole at a time: 1.01 - 1.16; 30 sec each
0.1 V Amplitude: Two Dipoles simultaneously at a time: 1.01  and 1.02 - 1.16; 30 sec each (in parallel)
1 V Amplitude: Two Dipoles simultaneously at a time 1.01  and 1.02- 1.16; 30 sec each (in parallel)
0.01 V Amplitude: Two Dipoles simultaneously at a time 1.01  and 1.02- 1.16; 30 sec each (in parallel)
0.01 V Amplitude: One Dipole at a time: 1.01 - 1.16; 30 sec each
 

Triggers
00:00 HPI
01:00 Phantom
05:00 Sensor localization

Sensor positions
If a location is 00 for x, y, and z, it is a bad channel

Coregistration
Before and after measurement day
HPI coils 1-5, one measurement per file 
43 Hz sine wave
100  Ohm resistor
10 sec measured at two amplitudes: 0.05 V and 0.5V

Two Polhemus files:
Polhemus head shape measurement outside the helmet and inside the helmet
Five point Polhemus file has fiducially, HPI coils, and 5 points on the OPM helmet
	Run Polhemus twice: “OPM_Enzo1”
Polhemus reference points on the helmet
LPA: Helmet Point 1
RPA: Helmet Point 4
Nasion: Helmet Point 2
Cz: Helmet Point 3
Inion: Helmet Point 5

Coil1: Right arm
Coil 2: Left arm
Coil 3: center top towards feet
Coil 4: center top towards helmet
Coil 5: on top PCB
(Need relative coordinates for these points)
What is the spacing between PCBs?

OPM1: dimple on right (= Point 2 on phantom)
OPM2: dimple on left (= Point 1 on phantom)
OPM3: dimple on top (= Point 5 on phantom)
OPM4: dimple on right front (= Point 3 on phantom)
OPM5: dimple on left front (= Point 4 on phantom)
	
The coordinates of the helmet reference Points in the sensor frame are:

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Photo of the setup:

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Coordinates oof the Polhemus point on the Phantom in the helmet frame:
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Phantom dipole position in the sensor coordinate frame are in file: “Alpha 2 Helmet Phantom Dipole Coordinates - Sheet1.csv”