Caren van Roekel

239 Use of an anti-reflux catheter in 166 Ho-radioembolization TABLE 1. Patient and treatment characteristics (continued) Characteristic n or median + range All included patients(n=28) Treated population (n=21) Liver volume (mL) 1968 (1560-3134) 1923 (1428-2952) Metabolic tumor volume (mL) 271 (88-769) 311 (70-769) Tumor load (%) 15 (5-35) 16 (5-26) Total prescribed activity (MBq) 7607 (4850-12782) 7862 (4325-12782) Total residual activity (MBq) 346 (98-4107) 495 (98-4107) Administered therapeutic activity (MBq) 7119 (3142-12386) 7099 (3142-12386) Administered 166 Ho scout activity (MBq) 246 (163-156) 238 (163-356) TABLE 2. Administration characteristics of 21 treated patients Characteristic n or median + range Standard microcatheter Anti-reflux catheter Anti-reflux catheter – Surefire Infusion System (1 st generation) Anti-reflux catheter – Surefire Precision Infusion System (2 nd generation) Perfusion territory volume (mL) 711 (157-1901) 1104 (462-1685) 938 (462-1685) 711 (704-1271) Tumor volume 101 (14-417) 175 (43-379) 175 (43-379) 178 (86-256) Tumor burden (%) 15 (2-46) 16 (6-72) 17 (6-72) 13 (8-20) Anatomy Standard 13 16 12 4 Replaced main perfusion territory artery 6 4 3 1 Early branching pattern 2 1 1 0 Coil- embolization* 1 0 0 0 Total administered activity (MBq) 2206 (671- 5867) 3525 (680- 5995) 4443 (1777-5525) 4075 (680-5995) *Coil-embolization of a main perfusion territory artery 9