<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography"^^ . "Purpose: The rectal tube (RT) is a common source of false positives (FPs) in computer-aided detection (CAD) systems for CT colonography. A robust and efficient detection of RT can improve CAD performance by eliminating such “obvious” FPs and increase radiologists’ confidence in CAD. Methods: In this paper, we present a novel and robust bottom-up approach to detect the RT. Probabilistic models, trained using kernel density estimation on simple low-level features, are employed to rank and select the most likely RT tube candidate on each axial slice. Then, a shape model, robustly estimated using Random Sample Consensus (RANSAC), infers the global RT path from the selected local detections. Subimages around the RT path are projected into a subspace formed from training subimages of the RT. A quadratic discriminant analysis (QDA) provides a classification of a subimage as RT or non-RT based on the projection. Finally, a bottom-top clustering method is proposed to merge the classification predictions together to locate the tip position of the RT. Results: Our method is validated using a diverse database, including data from five hospitals. On a testing data with 21 patients (42 volumes), 99.5% of annotated RT paths have been successfully detected. Evaluated with CAD, 98.4% of FPs caused by the RT have been detected and removed without any loss of sensitivity. Conclusion: The proposed method demonstrates a high detection rate of the RT path, and when tested in a CAD system, reduces FPs caused by the RT without the\r\nloss of sensitivity."^^ . "2011-10-27" . . . "38" . "11" . . "Wiley"^^ . . . "Medical Physics"^^ . . . "00942405" . . . . . . . . . . "X."^^ . "Yang"^^ . "X. Yang"^^ . . "G. G."^^ . "Slabaugh"^^ . "G. G. Slabaugh"^^ . . . . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography (PDF)"^^ . . . . . . . . "Robust and efficient.pdf"^^ . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography (Indexer Terms)"^^ . . . . . . "indexcodes.txt"^^ . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography (Other)"^^ . . . . . . . . "lightbox.jpg"^^ . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography (Other)"^^ . . . . . . . . "preview.jpg"^^ . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography (Other)"^^ . . . . . . . . "medium.jpg"^^ . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography (Other)"^^ . . . . . . . . "small.jpg"^^ . . . "A robust and efficient approach to detect 3D rectal tubes from CT colonography (Other)"^^ . . . . . . . . "Robust and efficient.pdf"^^ . . "HTML Summary of #4703 \n\nA robust and efficient approach to detect 3D rectal tubes from CT colonography\n\n" . "text/html" . . . "QA75 Electronic computers. Computer science"@en . .