低对比度胸片中管线检测方法

一般在重症监护病房中常用便携式胸片机来辅助医生监控患者的病情进展,了解各种医用管线在病人体内的具体位置。但便携式X光机得到的胸片有着低对比度、噪声多的缺陷,且胸片中的管线并不清晰,使得医生不便于观测管线的位置。文中提出一种在ICU病房中胸片的管线检测方法,在得到病人的胸片后,使用对比度限制的自适应直方图均衡化处理方法来调整对比度,再对其进行双边滤波来去除噪声,同时增强管线的细节信息,然后再做管线检测。将文中方法应用在100余张便携式胸片中,结果显示所提方法可有效检测医用管线,且有效准确率接近90%。

Tube Detection in Low-contrast Chest

In the intensive care unit (ICU) a portable chest X-ray machine is used by clinicians to help monitor the progression of the patient and identify the location of various medical tubes in the patient's body.However the chests from the portable chest X-ray machine have the defects of low contrast,noise,and vague image of tubes on chests,making it difficult for radiologist to locate the tubes.This study presents a method for detecting tubes in ICU portable chest X-ray image.First a contrast limited adaptive histogram equalization (CLAHE) process is performed on the patient's chest obtained to adjust the contrast information.Then bilateral filtering is used to smooth the chest and keep edge at the same time.Finally the tube detection is done on the image.The approach was applied on about 100 images taken from a portable chest X-ray machine,the results show that the proposed method can effectively detect the tubes in ICU chest radiographs with an accuracy approaching 90%.