การพัฒนาเทคนิคในการถ่ายภาพเอกซเรย์ช่องท้องระบบดิจิทัลเพื่อลดปริมาณรังสีที่ผิวผู้ป่วยได้รับ

Optimization of Digital Abdominal X-ray Imaging Techniques to Reduce Radiation Dose.

Abstract

Abstract

          This experimental research aimed to develop digital abdominal radiography techniques that could reduce radiation dose while maintaining adequate diagnostic image quality. Data were collected from 82 patients during January to March 2025, including gender, age, weight, height, examination thickness, kV, mAs, and DI values. These data were used to calculate patient radiation doses and analyze them to establish new techniques for abdominal X-ray radiation dosage.

          The results showed that after technique development, the patient radiation dose significantly decreased from 1.43 mGy to 1.31 mGy, representing an 8.39% reduction (p = 0.024), which was lower than Thailand's 2023 diagnostic radiation reference levels. Regarding image quality, after technique development, all images fell within the appropriate Deviation Index range (-3 < DI < 3), showing a 39.02% improvement from the original. Correlation analysis revealed that tube current-time product (mAs) had a high positive correlation with entrance surface dose (r = 0.825, p < 0.001), abdominal thickness showed a moderate positive correlation (r = 0.432, p < 0.001), and tube voltage (kVp) demonstrated a low positive correlation (r = 0.160, p = 0.005). No factors were found to correlate with the Deviation Index.

          This study benefits both patients and physicians by reducing patients' radiation risks while improving image quality for diagnosis. The findings can be further applied to develop radiographic techniques for other body parts.

*Department of Radiology, Chiangsaen Hospital

 E-mail address  : somsak_krap@hotmail.com

Keywords: Abdominal radiography, Entrance Surface Air Kerma, Deviation Index