Effective Dose in Gastric X-ray Examination using a Flat-Panel Detector Compared with a Digital Radiography Image Intensifier

抄録

We evaluated the effective dose (mSv), dose area product (DAP: cGy cm2) and entrance surface dose (ESD: mGy) of a flat-panel detector for fluoroscopy (FPD) for gastric cancer screening in Japan by comparing the values obtained in three settings: diagnostic workup, standard radiography I (population-based screening) and standard radiography II (opportunistic screening). We then compared the values obtained using the FPD with those obtained by a digital radiography image intensifier for fluoroscopy (DRII) in the standard radiography I and II settings. The effective dose of the FPD was 19.66 mSv for diagnostic workup, 13.86 mSv for standard radiography I and 14.85 mSv for standard radiography II. For standard radiography I, the effective dose was 12.70 mSv for the FPD and 4.71 mSv for the DRII; the corresponding values for standard radiography II were 14.29 mSv and 5.18 mSv. Thus, the FPD showed a higher effective dose in the order of diagnostic workup, standard radiography II and standard radiography I. Also, the FPD delivered a higher effective dose than the DRII.