@inproceedings{542108090d0a49198b8a35ae59e4e6c3,
title = "Semi-automated location identification of catheters in digital chest radiographs",
abstract = "Localization of catheter tips is the most common task in intensive care unit imaging. In this work, catheters appearing in digital chest radiographs acquired by portable chest x-rays were tracked using a semi-automatic method. Due to the fact that catheters are synthetic objects, its profile does not vary drastically over its length. Therefore, we use forward looking registration with normalized cross-correlation in order to take advantage of a priori information of the catheter profile. The registration is accomplished with a two-dimensional template representative of the catheter to be tracked generated using two seed points given by the user. To validate catheter tracking with this method, we look at two metrics: accuracy and precision. The algorithms results are compared to a ground truth established by catheter midlines marked by expert radiologists. Using 12 objects of interest comprised of naso-gastric, endo-tracheal tubes, and chest tubes, and PICC and central venous catheters, we find that our algorithm can fully track 75% of the objects of interest, with a average tracking accuracy and precision of 85.0%, 93.6% respectively using the above metrics. Such a technique would be useful for physicians wishing to verify the positioning of catheter tips using chest radiographs.",
keywords = "Catheter, Computer aided detection, Digital radiographs, Match filtering, Template matching, Tip identification, Tracking",
author = "Keller, {Brad M.} and Reeves, {Anthony P.} and Cham, {Matthew D.} and Henschke, {Claudia I.} and Yankelevitz, {David F.}",
year = "2007",
doi = "10.1117/12.707769",
language = "English",
isbn = "0819466328",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
number = "PART 1",
booktitle = "Medical Imaging 2007",
edition = "PART 1",
note = "Medical Imaging 2007: Computer-Aided Diagnosis ; Conference date: 20-02-2007 Through 22-02-2007",
}