Dual Modality Tomography: The Image Analysis Of Forward Problem

Abstract

Kertas kerja ini mempersembahkan satu idea yang baru di dalam proses tomografi iaitu kombinasi di antara dua modaliti; electrical capacitance dan optikal tomografi untuk mengawasi pengukuran aliran pepejal/gas. Sistem Dual Modality Tomography (DMT) mengandungi lapan sensor capacitance elektrod dan 16 pasang sensor optikal di dalam satu lapis sensor. Data yang diambil dari kedua–dua sensor dipindahkan sesiri ke PC dengan kawalan dan dipicu oleh sistem perolehan data. Data yang didapati daripada kedua–dua sensor akan distrukturkan semula kepada imej menggunakan Linear Back Projection atau Iterative Reconstruction Algorithm. Di dalam projek ini, DMT akan menghasilkan cantuman imej, yang mana dibangunkan berdasarkan penyesuaian nilai pixel dan kawasan pengesanan pada penstrukturan semula imej pixel di antara sensor capacitance dan optikal tomografi. Senarai analisis kesilapan akan menentukan kebolehlaksanaan sensor DMT untuk menentusahkan ia sebagai instrumen bagi melihat aliran pepejal. Kata kunci: Electrical capacitance tomografi; optikal tomografi; dua mod tomografi; cantuman imej; algoritma penstrukturan semula The paper presents the novel idea in process tomography which is the combination of dual modality; electrical capacitance and optical tomography for monitoring solid/gas flow measurement. Dual Modality Tomography (DMT) system consists of eight electrodes of capacitance sensor and 16 pairs of optical sensor in one sensor plane. The data obtained from both sensors were inseries transfer to PC with control and triggered by data acquisition system. The data obtained from both sensors will then be reconstructed into image using Linear Back Projection or Iterative Reconstruction Algorithm. In this project, the DMT produces an image fusion, which is developed based on the adjustment of pixel values and the detection region of pixel images reconstruction between capacitance and optical tomography sensor. Series of error analyses will determine the feasibility of the DMT sensors to perform as an instrument in solid flow visualization. Key words: Electrical capacitance tomography; optical tomography; dual mode tomography; image fusion; reconstruction algorithm