refine dataset citation and availability notes

README.md

@@ -42,6 +42,9 @@ These sources are used by FleXray but not redistributed here. Their FleXray labe
 specifications (native label names, protocol aliases and drops) are shipped with the
 `flexray` package under `fxr/configs/datasets/<Name>.yml`.
 
+ThoracoaMonch was also used by FleXray, but its upstream project is no longer
+available and its license cannot be verified.
+
 | Dataset | Role | Why not redistributed | Where to get it |
 |---|---|---|---|
 | MOOSE / ENHANCE-PET 1.6k | training (CT, DRR rendering) | CT sources are not redistributed; already public | https://registry.opendata.aws/enhance-pet-1-6k/ |
@@ -55,7 +58,6 @@ specifications (native label names, protocol aliases and drops) are shipped with
 | DarwinCVD19 | evaluation | mixed per-image image licenses | https://darwin.v7labs.com/v7-labs/covid-19-chest-x-ray-dataset |
 | DeepFluoro | evaluation | CC BY-NC 4.0; already hosted on Hugging Face | https://huggingface.co/datasets/eigenvivek/xvr-data |
 | RAM-W600 | evaluation | CC BY-NC-SA 4.0; already hosted on Hugging Face | https://huggingface.co/datasets/TokyoTechMagicYang/RAM-W600 |
-| ThoracoaMonch | evaluation | upstream project no longer available; license unverifiable | https://universe.roboflow.com/monchbot1 |
 | VinDr-Rib | evaluation | signed data use agreement required | https://vindr.ai/ribcxr |
 
 ## Usage
@@ -90,6 +92,6 @@ FleXray paper:
 }
 ```
 
-If you use any of the other datasets, please cite the original dataset sources
-and comply with their copyright and license terms. Citations and licensing
+**If you use any of the other datasets, please cite the original dataset sources
+and comply with their copyright and license terms.** Citations and licensing
 details are listed in the `README.md` and `LICENSE` files within each dataset folder.