Optimization of CT scanning technology / 中国医学装备

ABSTRACT

Due to the advance of CT equipment, combined with the current intensifying doctor-patient conflict, the indication of CT examination is relaxed, even expanded to the examination of benign lesions, which contributes to the blind diagnosis using CT or the so-called“Casting a big net”. However, X-rays bring two kinds of risks. One of them is the risk of the accumulated X-rays, the other one is the missed diagnosis resulting from the poor image quality, which is caused by the low amount of radiation. Therefore, how to strike a balance between these two not only becomes the focus of academic circles, but sparks the whole society’s attention. This article elaborates X-rays hazards, CT radiation does, application of Multiple Detector Spiral CT, purpose and principles of radiological protection and optimization of CT scanning technology. The author believes “exposure does individualization” can be achieved under the principle of ALARA (as low as reasonably achievable), or we can even minimize the exposure does according to the requirements of diagnosis and accept the image with appropriate noise.