Analisis Perbandingan Performa Adaptive Statistical Iterative Reconstrucion-V dan Non ASiR-V dalam Optimalisasi Dosis dan Image Quality : Studi Kasus Fantom Pediatrik

Rachmawatie, Nieke Eka (2025) Analisis Perbandingan Performa Adaptive Statistical Iterative Reconstrucion-V dan Non ASiR-V dalam Optimalisasi Dosis dan Image Quality : Studi Kasus Fantom Pediatrik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh algoritma Adaptive Statistical Iterative Reconstruction-V (ASIR-V) terhadap kualitas citra dan dosis radiasi pada pemindaian CT pediatric. Penelitian menggunakan fantom Various Age-size Pediatric Chest (VAPC) usia 1, 4, dan 7 tahun. Parameter kualitas citra yang dianalisis meliputi Signal-to-Noise Ratio (SNR), Contrast-to-Noise Ratio (CNR), dan Noise Power Spectrum (NPS) sementara dosis diukur menggunakan film Gafchromic LD-VI dan dikalibrasi dengan kurva polinomial orde tiga. Hasil penelitian menunjukkan bahwa peningkatan persentase ASIR-V dari 20%, 40%, 60% dan 80% secara signifikan meningkatkan nilai rata-rata SNR dan CNR. Rekonstruksi ASiR-V yang paling optimal adalah 80% pada hampir semua usia fantom pediatrik. Kenaikan SNR berbanding lurus dengan nilai CNR dari 5,63 (Rekonstruksi Non ASiR-V) menjadi 7,93 pada saat kenaikan ASiR-V 80%. Penurunan noise sebesar 42,30% - 61,34% terjadi dengan menggunakan rekonstruksi ASiR-V dengan nilai paling tinggi terjadi pada usia 7 Tahun. Peningkatan presentase ASiR-V juga menunjukkan penurunan dosis organ yang optimal hingga 70% pada usia 1 tahun dari Non ASiR-V ke presentase ASiR-V 80%. Penelitian juga menunjukkan bahwa ukuran tubuh memiliki pengaruh terhadap efektivitas rekonstruksi citra yang diberikan dengan rekomendasi pemeriksaan pada usia yang lebih tinggi. Oleh karena itu, ASiR-V sangat direkomendasikan dalam pencitraan CT pediatrik, khususnya untuk pasien anak dengan ukuran tubuh lebih kecil.
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This study aimed to analyze the effect of the Adaptive Statistical Iterative ReconstructionV (ASIR-V) algorithm on image quality and radiation dose in pediatric CT scans. The study used Various Age-size Pediatric Chest (VAPC) phantoms aged 1, 4, and 7 years. The image quality parameters analyzed included the Signal-to-Noise Ratio (SNR), Contrast-to-Noise Ratio (CNR), and Noise Power Spectrum (NPS), while the dose was measured using Gafchromic LDVI film and calibrated with a third-order polynomial curve. The results showed that increasing the ASiR-V percentage from 20% to 40%, 60%, and 80% significantly increased the average SNR and CNR values. The most optimal ASiR-V reconstruction was 80% for almost all ages of the pediatric phantoms. The increase in SNR was directly proportional to the CNR value from 5.63 (non-ASiR-V reconstruction) to 7.93 when the ASiR-V increase was 80 A decrease in noise of 42.30%–61.34% occurred using ASiR-V reconstruction with the highest value occurring at the age of 7 years. The increase in the percentage of ASiR-V also showed a decrease in the optimal organ dose of up to 70% at the age of 1 year from non-ASiR-V to the percentage of ASiR-V 80%. Research also shows that body size influences the effectiveness of image reconstruction given with examination recommendations at a higher age. Therefore, ASiR-V is highly recommended for pediatric CT imaging, especially in pediatric patients with smaller body sizes.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	ASiR-V, Fantom Pediatric, Iterative Reconstruction (IR), Kualitas Citra,
Subjects:	Q Science Q Science > QC Physics Q Science > QC Physics > QC795.5 Radioactivity and radioactive Instruments and apparatus (General)
Divisions:	Faculty of Mathematics and Science > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Nieke Eka Rachmawatie
Date Deposited:	29 Jul 2025 01:02
Last Modified:	29 Jul 2025 01:02
URI:	http://repository.its.ac.id/id/eprint/120858

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