Figure 12.

Brachytherapy phantom: interstitial ring and tandem. (A) 3D rendering of (a) interstitial ring, (b) low‐density tissue‐simulating inserts, (c) higher density bone‐simulating insert, (d) plastic support rod, (e) Superflab, (f) Delrin rods (simulating femurs), (g) interstitial needles, (h) first dwell position marker, and (i) tandem rod. (B) Coronal slice showing the interstitial ring, low‐density inserts, high‐density inserts, first dwell position, and tandem rod. (C) Transverse slice showing interstitial needles, tandem rod, and tissue‐simulating inserts (each labeled according to relative electron density).