Reddy M S, Jeffcoat M K
Department of Periodontics, School of Dentistry, University of Alabama at Birmingham.
Dent Clin North Am. 1993 Oct;37(4):553-65.
Subtraction radiography offers greater visualization of radiographic changes between a pair of radiographs by subtracting out the unchanging background distractions. Originally, subtraction was achieved by using positive and negative prints in angiography. The advent of digital imaging devices has led to validation of quantitative measurements from digital subtraction images. As well, computer software manipulations have allowed for more flexibility in the clinical application of subtraction imaging. The clinical application of digital subtraction radiography is discussed along with clinical cases.
减影放射成像通过去除不变的背景干扰，能更清晰地显示一对X光片之间的放射学变化。最初，减影是通过在血管造影中使用正片和负片来实现的。数字成像设备的出现使得对数字减影图像进行定量测量得到了验证。此外，计算机软件操作让减影成像在临床应用中更具灵活性。本文将结合临床病例讨论数字减影放射成像的临床应用。
