Analisis Optimasi Citra Radiografi Pada Pemeriksaan Thorax Sistem Computed Radiography (CR) Terhadap Entrance Surface Dose (ESD)

Tri Ambarsari, Budi Santoso, Nursama Heru Apriantoro, Febria Anita


Telah dilakukan penelitian analisis variasi faktor eksposi pemeriksaan thorax terhadap dosis permukaan dan noise pada citra radiografi. Dilakukan 10 (sepuluh) kali ekspos pada phantom thorax dengan faktor  eksposi 50 kV- 8 mAs, 50 kV-10 mAs, 55 kV- 8 mAs, 55 kV-10 mAs, 55 kV-10 mAs, 60 kV- 8 mAs, 60 kV-10 mAs, 66 kV-8 mAs, 66 kV-10 mAs dan 102 kV- 1 mAs, 102 kV - 2,5 mAs untuk teknik kV tinggi. Untuk masing-masing faktor eksposi ditempelkan satu TLD yang diletakkan di tengah lapangan penyinaran untuk mengukur nilai dosis permukaan. Kondisi eksposi optimum pemeriksaan thorax PA (dinyatakan dengan nilai lgM ) terjadi ketika penggunaan faktor eksposi 55 kV dengan 8 mAs karena nilai lgM yang didapat yaitu 1,91 , nilai standar deviasi 6,605 dan nilai ESD sebesar 0,098 mGy.


Variasi faktor eksposi, Dosis permukaan, Computed Radiography (CR)

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