牙科干板X线摄影术的延时图像退化

Time-delay image degradation with dental xeroradiography.

作者信息

Gratt B M, Kashima I, Sickles E A

出版信息

Oral Surg Oral Med Oral Pathol. 1982 Dec;54(6):696-700. doi: 10.1016/0030-4220(82)90087-1.

Abstract

Dental xeroradiography produces high-quality images of dental structures under ideal conditions. However, charged-but-not-developed xeroradiographic photoreceptor plates lose some of their charge with time, a phenomenon termed "dark decay." This investigation assesses the maximum allowable time delay between (1) charging and exposing the photoreceptor, (2) exposing and developing the photoreceptor, and (3) a combination of both delays. Measurements of resolution, background density, broad-area contrast, noise, point discharge artifacts, and diagnostic image quality indicate that photoreceptors should be processed within 5 to 10 minutes of charging in order to avoid substantial image degradation.

摘要

牙科干板X线摄影术在理想条件下能产生高质量的牙齿结构图像。然而，已充电但未显影的干板X线摄影感光板会随着时间的推移失去部分电荷，这种现象称为“暗衰”。本研究评估了（1）感光板充电与曝光之间、（2）感光板曝光与显影之间以及（3）两者延迟的组合之间的最大允许时间延迟。对分辨率、背景密度、大面积对比度、噪声、点放电伪影和诊断图像质量的测量表明，为避免图像质量大幅下降，感光板应在充电后5至10分钟内进行处理。