Philips Healthcare, 595 Miner Road, Highland Heights, OH 44143, United States.
Comput Med Imaging Graph. 2012 Jul;36(5):387-95. doi: 10.1016/j.compmedimag.2012.04.004. Epub 2012 May 5.
X-ray tube arcing in computed tomography scanners causes poor image quality. During the time that the X-ray tube recovers to full voltage after an arc, image data is being collected. Normally this data, acquired at less than full voltage, is discarded and interpolation is performed over the arc duration. We have developed an algorithm that corrects for improper tube voltage, allowing previously discarded data to be used for imaging. The use of voltage corrected data provides improved image quality compared to simple interpolation methods. This improvement is relevant today as the imaging field uses faster scanners with shorter sampling times.
X 射线管在计算机断层扫描设备中发生电弧会导致图像质量变差。在电弧后 X 射线管恢复到全电压的过程中，会采集图像数据。通常情况下，低于全电压采集的数据会被丢弃，并在电弧持续时间内进行插值。我们开发了一种算法，可以纠正不当的管电压，从而可以使用以前丢弃的数据进行成像。与简单的插值方法相比，使用校正后的电压数据可以提供更高质量的图像。随着成像领域使用具有更短采样时间的更快扫描仪，这种改进变得更加重要。
