The results of the 2012 EURADOS head intercomparison are published in two papers, "EURADOS intercomparison exercise on MC modelling for the in-vivo monitoring of ²⁴¹Am in skull phantoms Part 1 and Part 2". VMC in-vivo was participant P17 in both Parts. Three different voxel phantoms of the head corresponding to real physical heads were provided for the intercomparison. ²⁴¹Am in the cranial bone counted using Ge detectors was simulated for the three phantoms.

PART 1 the CSR head phantom

Figure 1 Counting ²⁴¹Am in the bone of the CSR head phantom with Ge detector.

Figure 2. Experimental and VMC in-vivo ²⁴¹Am spectra and comparison of the participants' relative detection efficiencies with estimated uncertainties for the CSR head intercomparison.

PART 2A the CSR head phantom

In a similar way as in Part 1, activity of ²⁴¹Am in the bone of the voxelized CSR head phantom counted using a Ge detector was simulated with VMC in-vivo.

Figure 2. Part 2A - comparison of experimental and VMC results for ²⁴¹Am in the bone of the CSR head phantom.

PART 2B the BPAM-001 head phantom

Activity of ²⁴¹Am in the bone of the voxelized BPAM-001 head phantom counted using a Ge detector was simulated.

Figure 3. Part 2B - experimental measurement and VMC in-vivo simulation comparison for ²⁴¹Am in the bone of the BPAM-001 phantom and the VMC counting geometry.

PART 2C the Bfs head phantom with tilted detector

Activity of ²⁴¹Am in the bone of the voxelized Bfs head phantom counted using a tilted Ge detector was simulated.

Figure 4. Part 2C - experimental measurement and VMC in-vivo simulation comparison for ²⁴¹Am in the Bfs phantom and the VMC counting geometry with tilted Ge detector.

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