TINJAUAN SISTEMATIS TEKNIK REDUKSI NOISE PADA CITRA CT SCAN THORAKS UNTUK PENINGKATAN KUALITAS DIAGNOSTIK
DOI:
https://doi.org/10.24252/sainfis.v5i2.63790Kata Kunci:
Citra, CT Scan, Diagnostik, Rekonstruksi, ThoraksAbstrak
Penggunaan protokol dosis rendah pada pemeriksaan CT semakin diutamakan untuk mengurangi paparan radiasi pada pasien. Namun, penurunan dosis ini menyebabkan peningkatan derau yang berakibat pada turunnya kualitas citra dan berpotensi mengganggu ketepatan diagnosis. Untuk mengatasi masalah tersebut, berbagai teknik rekonstruksi citra telah dikembangkan, mulai dari rekonstruksi proyeksi balik terfilter, rekonstruksi iteratif, rekonstruksi iteratif hibrida, hingga rekonstruksi berbasis kecerdasan buatan. Penelitian ini menelaah lima jurnal yang membandingkan kinerja berbagai metode rekonstruksi berdasarkan dua parameter objektif, yaitu rasio sinyal terhadap derau (SNR) dan rasio kontras terhadap derau (CNR). Hasil telaah menunjukkan bahwa rekonstruksi proyeksi balik terfilter menghasilkan kualitas citra paling rendah karena tidak memiliki model pengendalian derau, sedangkan rekonstruksi iteratif mampu menekan derau namun sering menimbulkan citra yang terlalu halus sehingga detail anatomi berkurang. Sebaliknya, rekonstruksi berbasis kecerdasan buatan khususnya tingkat tinggi secara konsisten memberikan nilai SNR dan CNR tertinggi, mampu mempertahankan detail anatomi halus, serta menjaga ketajaman tepi meskipun dosis radiasi sangat diturunkan. Berdasarkan keseluruhan temuan, rekonstruksi berbasis kecerdasan buatan tingkat tinggi merupakan metode yang paling efektif dan paling direkomendasikan untuk meningkatkan kualitas citra CT dosis rendah tanpa mengurangi keandalan penilaian klinis.
Unduhan
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