Upload README_0033_tcia_nlst.md

0033_tcia_nlst/README_0033_tcia_nlst.md

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+# National Lung Screening Trial (NLST)
+
+## License
+**CC BY 4.0**  
+[Creative Commons Attribution 4.0 International License](https://creativecommons.org/licenses/by/4.0/)
+
+## Citation
+Paper BibTeX:
+```bibtex
+@article{national2011reduced,
+  title={Reduced lung-cancer mortality with low-dose computed tomographic screening},
+  author={National Lung Screening Trial Research Team},
+  journal={New England Journal of Medicine},
+  volume={365},
+  number={5},
+  pages={395--409},
+  year={2011},
+  publisher={Mass Medical Soc}
+}
+```
+
+Dataset:
+
+```bibtex
+National Lung Screening Trial Research Team. (2013). Data from the National Lung Screening Trial (NLST) [Data set]. The Cancer Imaging Archive. https://doi.org/10.7937/TCIA.HMQ8-J677
+```
+
+
+## Dataset description
+
+The NLST investigated whether low-dose CT screening could reduce lung cancer mortality in high-risk individuals. Between 2002–2004, 53,454 participants were randomized to three annual screenings with either low-dose CT or chest radiography. This dataset includes low-dose CT scans from 26,254 subjects and histopathology images from 451 subjects, enabling research on early detection and screening efficacy.
+
+**Number of CT volumes**: 7172
+
+**Contrast**: Low-dose, non-contrast
+
+**CT body coverage**: Chest
+
+**Does the dataset include any ground truth annotations?**: No
+
+**Original GT annotation targets**: -
+
+**Number of annotated CT volumes**: -
+
+**Annotator**: -
+
+**Acquisition centers**: 33 medical centers across the United States
+
+**Pathology/Disease**: High-risk individuals screened for lung cancer
+
+**Original dataset download link**: https://www.cancerimagingarchive.net/collection/nlst/
+
+**Original dataset format**: DICOM
+