--- license: cc-by-nc-4.0 --- Main protocol Performer: Hamza \ Purpose / Hypothesis: Using 2 different foam with gap betweend them. Needle size: 22G \ Needle tip: Quincke \ Punctured Material: 1.5 cm foam, Two of 1 cm on top each other \ Phantom setup: Foam 1(1cm foams in total 2 cm) and foam 2(1.5cm) with gap between and otherway around [photo 1] Extended: Window box is used. Between materials there was air gap. New holder used for stable sensor placement on needle shaft. [photo 2] Filename meaning: \ hamza_foam1-foam2_22g_quincke_M.4.4.1.22G_2025-12-15_13.29.40 user_phantom_needle-gauge_needle-type_sensor-type_timestamp Sensor places on channel 0. Channel 1 wasnt connected Needle tracking protocol Marker Size: 4 cm Marker Border size: 1.2 cm Needle offset: 9.3 cm Z-offset: 0.5 cm