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Table 1 Abdominal phantom compartment activities assessed by the MEPH with scatter correction [MEPH-SCAT] SPECT

From: Yttrium-90-labeled microsphere tracking during liver selective internal radiotherapy by bremsstrahlung pinhole SPECT: feasibility study and evaluation in an abdominal phantom

  True 3.6-min Acquisition time 1-min Acquisition time
  Volume
(ml)
RSA % of 1.4 GBq % of 1.4 GBq RD
(%)
% of 1.4 GBq RD
(%)
Core 13 0 0 1.14 ± 0.13 NA 1.20 ± 0.17 NA
Shell 52 4 27.31 20.79 ± 0.35 -24 20.42 ± 0.59 -25
Isolated tumor 13 4 5.46 4.34 ± 0.10 -21 4.32 ± 0.27 -21
Healthy liver 1 34 1 3.73 3.22 ± 0.15 -14 3.26 ± 0.18 -13
Healthy liver 2 58 0.25 1.60 2.46 ± 0.59 54 2.12 ± 0.20 32
Healthy liver 3 58 0.5 3.20 4.03 ± 0.26 26 4.11 ± 0.31 28
Healthy liver 4 58 0.5 3.20 4.25 ± 0.59 33 4.33 ± 0.40 35
Total healthy liver 709 NA 67.23 73.73 ± 0.41 10 74.06 ± 0.57 10
  1. Relative specific activities (RSA; healthy liver is set to 1) and percentage of total activity (mean ± SD) in the liver-SIRT phantom for the different regions: necrotic tumor (core and shell), isolated tumor, and healthy liver regions (1: VOI sample far from the tumors; 2, 3, 4: cylinders; total healthy liver: the whole region beside the tumors). RD, relative deviation; NA, not applicable.