T18: Predicting prostate volume, PSA, and PSA density¶
Objective:
Develop a model to predict three quantitative values from prostate MRI radiology reports:
- PSA level (ng/mL)
- Prostate volume (cm³)
- PSA density (ng/mL²)
Patient Population:
Radiology reports were collected from patients undergoing prostate MRI at:
- Radboudumc
- University Medical Center Groningen
- Antoni van Leeuwenhoek Ziekenhuis
The dataset includes 1,616 cases.
Imaging Data:
Not applicable. The task is based solely on textual data — radiology reports written in Dutch.
Test Data:
Unlabeled radiology reports consistent in format with the training data. The model must output a List of three continuous (floating-point) values per report:
- PSA level
- Prostate volume
- PSA density
Example: [68.0,9.7,0.14]
Reference Standard:
All labels were manually annotated by trained investigators. The reference values fall within the following ranges:
- PSA level: 0 to 870 ng/mL (95% between 2–35 ng/mL)
- Prostate volume: 4.0 to 470 cm³ (95% between 24–181 cm³)
- PSA density: 0 to 171 ng/mL² (95% between 0.03–0.6 ng/mL²)
Evaluation Metrics:
Model performance is measured using Robust Symmetric Mean Absolute Percentage Error (RSMAPE) with the following epsilon thresholds:
- PSA level: 0.04 ng/mL
- Prostate volume: 4 cm³
- PSA density: 0.04 ng/mL²
Relation to Existing Challenges:¶
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Task 18 in the UNICORN challenge combines the following three tasks from the DRAGON challenge:
- T19 (Prostate volume extraction)
- T20 (Prostate specific antigen extraction)
- T21 (Prostate specific antigen density extraction)
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In UNICORN, these tasks are combined into a multi-label regression task, as opposed to single-label regression in the original DRAGON challenge.