Summary
Download on NBIA by searching Collection name: LIDC
The Lung Imaging Database Consortium (LIDC) image collection consists of diagnostic and lung cancer screening thoracic CT scans with marked-up annotated lesions. It is a web-accessible international resource for development, training, and evaluation of computer-assisted diagnostic (CAD) methods for lung cancer detection and diagnosis.
For more information about the LIDC program please visit: http://imaging.cancer.gov/programsandresources/InformationSystems/LIDC
Supporting Documentation
Reader Annotation and Markup
These links help describe how to use the .XML annotation files which are packaged along with the images in NBIA.
- XML File Documentation
- Annotated XML File
- LIDC Radiologist Instructions for Spatial Location and Extent Estimates
Annotation and Markup Issues/Comments
- We recently (early 2009) discovered that, for a subset of cases, inconsistent rating systems were used among the 5 sites with regard to the spiculation and lobulation characteristics of lesions identified as nodules > 3 mm. We are in the process of correcting this situation. The XML nodule characteristics data as it exists for some cases will be impacted by this error.
- Also note that the XML files do not store radiologist annotations in a manner that allows for a comparison of individual radiologist reads across cases (i.e., the first reader recorded in the XML file of one CT scan will not necessarily be the same radiologist as the first reader recorded in the XML file of another CT scan).
Nodule Size List
This link provides a list of available cases and the associated size of each identified nodule.
Diagnosis Data
For a limited set of cases, LIDC sites were able to identify diagnostic data associated with the case. Data was collected for as many cases as possible and is associated at two levels:
- Diagnosis at the patient level (diagnosis is associated with the patient)
- Diagnosis at the nodule level (where possible)
At each level, data was provided as to whether the nodule was:
- Unknown (no data is available)
- Benign or non-malignant disease
- A malignancy that is a primary lung cancer
- A metastatic lesion that is associated with an extra-thoracic primary malignancy
For each lesion, there is also information provided as to how the diagnosis was established including options such as:
- unknown - not clear how diagnosis was established
- review of radiological images to show 2 years of stable nodule
- biopsy
- surgical resection
- progression or response
You can download this Diagnosis Data at: LIDC Diagnosis Data-01-08-10.xls
Note: Data is still arriving from the LIDC sites and so in the coming months this spreadsheet will be updated as more information is received
AIM Annotation Conversion Project
As part of an effort to move towards standard formats for annotation and markup a project has been undertaken to convert this data from the LIDC project into Annotated Image Markup format (AIM). AIM is a standard which was developed out of the caBIG program. A related section of the wiki has been dedicated to covering the activities of this project and can be found here: LIDC Conversion to AIM