Qudsiyah, Ummu (2025) Optimasi Protokol CT Kepala Pediatri Dosis Rendah pada Mode Manual dan ATCM: Evaluasi Dosis dan Kualitas Citra. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk menyusun dan mengevaluasi protokol CT kepala pediatri dosis rendah pada tegangan tabung 80 kVp dengan mode manual dan Automatic Tube Current Modulation (ATCM), guna meminimalkan paparan radiasi tanpa mengorbankan kualitas citra diagnostik. Lima protokol pemindaian diuji menggunakan fantom antropomorfik kepala pediatri yang dirancang khusus, serta film dosimetri Gafchromic LD-V1 untuk mengukur dosis serap organ. Evaluasi kualitas citra dilakukan secara kuantitatif menggunakan parameter Contrast-to-Noise Ratio (CNR), Modulation Transfer Function (MTF), dan Noise Power Spectrum (NPS). Hasil penelitian menunjukkan bahwa penurunan arus tabung secara bertahap mampu menurunkan CTDIvol hingga 72,99% (dari 22,03 mGy pada P1 menjadi 5,95 mGy pada P4), namun disertai degradasi kualitas citra yang signifikan. Mode ATCM menghasilkan dosis yang lebih adaptif, tetapi berpotensi meningkatkan dosis lokal pada organ tertentu. Protokol P3 (80 kVp, 175 mA) dinyatakan sebagai protokol paling optimal karena mampu menurunkan CTDIvol lebih dari 50% dengan kualitas citra yang masih memenuhi standar diagnostik. Hasil ini memberikan rekomendasi praktis bagi optimasi protokol CT pediatri yang lebih aman dan efisien.
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This study aims to develop and evaluate low-dose pediatric head CT protocols at a tube voltage of 80 kVp using both manual and Automatic Tube Current Modulation (ATCM) approaches, with the goal of minimizing radiation exposure while maintaining diagnostic image quality. Five scanning protocols were tested using a custom-designed anthropomorphic pediatric head fantom, and organ doses were measured using Gafchromic LD-V1 dosimetry films. Image quality was quantitatively assessed using Contrast-to-Noise Ratio (CNR), Modulation Transfer Function (MTF), and Noise Power Spectrum (NPS). The results showed that gradual reduction of tube current significantly decreased CTDIvol by up to 72.99% (from 22.03 mGy in P1 to 5.95 mGy in P4), although at the cost of image quality degradation. While ATCM achieved adaptive radiation control, it showed higher localized doses in certain organs. Among the tested protocols, Protocol P3 (80 kVp, 175 mA) was identified as the most optimal, offering more than 50% dose reduction with image quality that remained within acceptable diagnostic standards. These findings support the implementation of safer and more efficient CT protocols for pediatric head imaging.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | CTDIvol, Head CT, Low Dose, Image Quality, Pediatrics, CTDIvol, CT Kepala, Dosis Rendah, Kualitas Citra, Pediatri |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Ummu Qudsiyah |
| Date Deposited: | 04 Aug 2025 11:14 |
| Last Modified: | 08 Aug 2025 08:54 |
| URI: | http://repository.its.ac.id/id/eprint/124487 |
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