Table 1.
Demographics of the Patients and Protocols in the Image Datasets.
| Group | Dataset origin | No. of glioblastoma | No. of PCNSL | Age (y) | Female (%) | MR | TR/TE (ms), CE-T1WI | Slice thickness (mm), CE-T1WI | TR/TE (ms), DWI | Slice thickness (mm), DWI |
|---|---|---|---|---|---|---|---|---|---|---|
| Training set | AMC | 73 | 50 | 63.0 ± 11.7 | 35.9 | 3 T | 9.0–10.1/4.4–4.8 | 0.5 | 3000–4000/56–61.7 | 4 mm |
| Internal validation set | AMC | 18 | 12 | 58.8 ± 13.0 | 50.0 | 3 T | 9.0–10.1/4.4–4.8 | 0.5 | 3000–4000/56–61.7 | 4 mm |
| External validation set | SMC | 28 | 14 | 56.3 ± 10.6 | 50.0 | 3 T | 8.6–10.4/3.5–4.7 | 1 | 6900–12,000/55–81 | 3–5 mm |
Abbreviations: Data are expressed as mean ± standard deviation for age and range for image protocols. PCNSL = primary central nervous system lymphoma, TR = repetition time, TE = echo time, CE-T1WI = contrast-enhanced T1 weighted imaging, DWI = diffusion weighted imaging, AMC = Asan Medical Center, Seoul, Korea, SMC = Samsung Medical Center, Seoul, Korea.