低对比度胸片中管线检测方法

徐文涛,陈胜

(上海理工大学 光电信息与计算机工程学院,上海200093)

摘要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%。

关键词重症监护病房;低对比度胸片;对比度限制的自适应直方图均衡(CLAHE);双边滤波;管线检测

收稿日期:2015-04-21

作者简介:徐文涛(1992—),男,硕士研究生。研究方向:图像处理,医学图片研究,模式识别。E-mail:895364953@qq.com

doi:10.16180/j.cnki.issn1007-7820.2015.12.023

中图分类号TP391.41文献标识码A

Doi[3]Katsuragawa S,K.Computer-aided diagnosis in chest radiography[J].Computerized Medical Imaging and Graphics,2007,31(4):212-223.

Tube Detection in Low-contrast Chest

XU Wentao,CHEN Sheng

(School of Optical-Electrical and Computer Engineering,University of Shanghai for

Science and Technology,Shanghai 200093,China)

AbstractIn 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%.

Keywordsintensive care unit;low contrast chest;contrast limited adaptive histogram equalization;bilateral filtering;pipeline inspection

ICU的使用已有30余年的历史,现已成为医院中危重病人的抢救中心。ICU的监护水平已成为衡量一个医院水平的重要标志。ICU病房主要收治的对象均是重症患者,一般在ICU病房中的病人身上会插入各种导管来提高病人的存活能力,而知道这些管子的放置正确与否、是否随着时间而改变就变得尤为重要,若导管放置错误,则就会使病人的治疗过程变得痛苦甚至会加重病人的病情,比如将本应放在气管隆突位置的气管插管滑入支管后会导致肺的下叶崩溃,所以此时计算机辅助检测系统(CAD)的使用可以帮助医护人员了解病人体内各种导管的具体位置[1-2]。……