Noise simulation system for determining imaging conditions in digital radiography
スポンサーリンク
概要
- 論文の詳細を見る
Reduction of exposure dose and improvement in image quality can be expected to result from advances in the performance of imaging detectors. We propose a computerized method for determining optimized imaging conditions by use of simulated images. This study was performed to develop a prototype system for image noise and to ensure consistency between the resulting images and actual images. An RQA5 X-ray spectrum was used for determination of input-output characteristics of a flat-panel detector (FPD). The number of incident quantum to the detector per pixel (counts/pixel) was calculated according to the pixel size of the detector and the quantum number in RQA5 determined in IEC6220-1. The relationship among tube current-time product (mAs), exposure dose (C/kg) at the detector surface, the number of incident quanta (counts/pixel), and pixel values measured on the images was addressed, and a conversion function was then created. The images obtained by the FPD was converted into a map of incident quantum numbers and input into random-value generator to simulate image noise. In addition, graphic user interface was developed to observe images with changing image noise and exposure dose levels, which have trade-off relationship. Simulation images provided at different noise levels were compared with actual images obtained by the FPD system. The results indicated that image noise was simulated properly both in objective and subjective evaluation. The present system could allow us to determine necessary dose from image quality and also to estimate image quality from any exposure dose. © 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
- 2012-02-08
論文 | ランダム
- 80)興味ある心電図変化を示した転移性心膜腫瘍の1例 : 日本循環器学会第48回中国・四国地方会
- 92)心膜炎と高熱を主症状とした成人型若年性関節リウマチの1例 : 日本循環器学会第39回中国・四国地方会
- 24aZV-6 PHENIXシリコンピクセル検出器におけるボンディングワイヤの磁場中での共振現象と封止法(粒子・光検出器I,実験核物理領域)
- 21pTV-10 工作プラネタリウムを利用した科学広報活動報告(物理教育,領域13,物理教育,物理学史,環境物理)
- 26aSD-11 PHENIX実験用シリコンピクセル検出器のための量産組立て手順の開発(26aSD 粒子・光検出器,実験核物理領域)