LungCAD: A Clinically Approved, Machine Learning System for Lung Cancer Detection

author: Bharat Rao, Deloitte LLP
published: Aug. 14, 2007,   recorded: August 2007,   views: 4631

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We present LungCAD, a computer aided diagnosis (CAD) system that employs a classification algorithm for detecting solid pulmonary nodules from CT thorax studies. We briefly describe some of the machine learning techniques developed to overcome the real world challenges in this medical domain. The most significant hurdle in transitioning from a machine learning research prototype that performs well on an in-house dataset into a clinically deployable system, is the requirement that the CAD system be tested in a clinical trial. We describe the clinical trial in which LungCAD was tested: a large scale multi-reader, multi-case (MRMC) retrospective observational study to evaluate the effect of CAD in clinical practice for detecting solid pulmonary nodules from CT thorax studies. The clinical trial demonstrates that every radiologist that participated in the trial had a significantly greater accuracy with LungCAD, both for detecting nodules and identifying potentially actionable nodules; this, along with other findings from the trial, has resulted in FDA approval for LungCAD in late 2006.

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