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Table 1: Included patient characteristics (N = 40)
Patient Characteristics Value (SD)
Mean age (yr) 61.5 (11.1)
Age range (yr) 29–81
Male/female ratio 23:17
Pathology 
    Primary CNS large B-cell lymphoma 40
    Prior WBRT 5
    Median follow-up (yr)^{^a} 3.01
Total baseline MR imaging 33
    Total baseline CT 7
Total follow-up MR imaging 254
    Total follow-up CT 10
Mean number of MR images per patient 7.60 (3.49)
Mean number of lesions on baseline MR image 2.33 (1.14)
Disease location 
    Superficial 16
    Deep 15
    Mixed 9
Particular disease distribution 
    Midline crossing lesion 10
    Multifocal, bilateral lesions 16
Induction response^{^a} 22
Relapse after induction^{^a} 12
Note:—WBRT indicates whole brain radiotherapy; SD, standard deviation.
↵a One patient was lost to follow-up, and 5 stopped their treatment for palliative care and were not included in this analysis.