Darmawan, Fianti Femmilia (2017) Observasi Aktivitas Pendengaran Pada Otak Manusia Dengan Electrical Capacitance Volume Tomography. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dilakukan observasi terhadap aktivitas pendengaran pada otak manusia dengan mengamati citra yang dihasilkan oleh ECVT brain scanner 32 kanal. Perekaman aktivitas pendengaran dilakukan dengan memperdengarkan stimulus bunyi berupa single tone ke telinga kanan subjek. Dilakukan pula pengamatan pada sinyal otak hasil perekaman dengan EEG sebagai pembanding. Data hasil pengukuran ECVT kemudian direkonstruksi menjadi distribusi permitivitas (yang ditampilkan dalam bentuk citra otak) dengan metode average subtraction dan algoritma ILBP. Kemudian citra diolah dengan mencari jarak centroid dari keseluruhan frame yang dihasilkan agar didapatkan daerah irisan. Ditentukan Volume of Interest (VOI) dengan perkiraan posisi auditory cortex (A1) di 16≤ x ≤ 20; 7 ≤ y ≤ 10 | 23 ≤ y ≤ 26 dan 23 ≤ z ≤ 26. Hasil pengolahan citra dengan centroid menghasilkan daerah irisan dengan nilai permitivitas mencapai 1. Daerah tersebut kemudian di segmentasi berdasarkan warna dengan skala 0.8 - 1. Terekam aktivitas otak dengan EEG pada ritme alpha, dengan adanya kemiripan pola ERP pada waktu 30 ms, 45 ms, dan 130 ms. Polaritas potensial aksi bernilai negatif dengan amplitudo 1.6 µV. Pola ERP seluruh subjek memiliki kemiripan dengan koefisien korelasi di atas 0.5 kecuali S4 dengan koefisien korelasi 0.4. Citra ECVT hasil pengolahan dengan centroid memiliki kemiripan dengan koefisien korelasi di atas 0.5 pada seluruh kondisi stimulus.
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Observation of human brain auditory activity was done by interpreting 32-channels ECVT Brain Scanner's images. Single tone stimuli was presented to the right ear of subjects. Brain activity scanning was also done using EEG as a comparison. ECVT's measurement data was being reconstructed into permittivity distribution (brain image) by applying average subtraction method and ILBP algorithm. The distance of centroid from each image was being calculated to find composite area. Estimated location of auditory cortex is selected by determining Volume of Interest in the area of 16≤ x ≤ 20; 7 ≤ y ≤ 10 | 23 ≤ y ≤ 26 and 23 ≤ z ≤ 26. Composite area obtained from centroid's distance calculation and then being segmented based on color scale in 0.8 - 1. Recorded EEG activity occured in alpha rythm, with strong correlation of ERP pattern at 30 ms, 45 ms, and 130 ms. Potential action recorded has a negative polarity with amplitude 1.6µV. ERP pattern of all subjects have correlation coefficient larger than 0.5 except S4. In all conditions, ECVT image shows strong correlation with coefficient of correlation larger than 0.5.
Item Type: | Thesis (Undergraduate) |
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Uncontrolled Keywords: | Aktivitas Pendengaran; Auditory cortex; ECVT; Hearing activity |
Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7872 Electromagnetic Devices |
Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
Depositing User: | - FIANTI FEMMILIA DARMAWAN |
Date Deposited: | 05 May 2017 03:26 |
Last Modified: | 22 Dec 2017 07:56 |
URI: | http://repository.its.ac.id/id/eprint/3943 |
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