X-radiograph(s) of "Artist Painting a Portrait"

X-Radiograph Description: X-Radiograph X-Radiograph Settings: 5 ma, 40 kv, 40 sec. Burroughs Number: 4120 X-Radiograph(s) of: Artist: Regnier, Nicolas, Flemish, ca.1590-1667 Title: Artist Painting a Portrait Description: Oil on canvas lined with glue Owner: Harvard University Art Museums Object Number: 1982.116