Table 1 Average X-, Y-, and Z-spatial errors for T-PEPT, PEPT-ML, and the Birmingham Method for the 600 RPM case scenarios. Data for which PEPT-ML and the Birmingham Method were unable to locate all 5 tracers successfully are not considered. The number of LORs per sample was 1000 for all three algorithms.

From: A topological approach to positron emission particle tracking for finding multiple particles in high noise environments

Scenario

Method

No. tracers located

Error (mm)

X

Y

Z

Glass tracer, aluminium walls

T-PEPT

5

0.64 (15)

0.97 (15)

0.67 (15)

PEPT-ML

5

0.83 (14)

1.16 (14)

0.91 (14)

BHAM Method

4

1.2 (3)

2.0 (3)

1.4 (3)

Glass tracer, steel walls

T-PEPT

5

1.84 (19)

2.28 (19)

1.94 (19)

PEPT-ML

5

2.25 (19)

2.68 (19)

2.31 (19)

BHAM Method

4

3.8 (4)

4.6 (4)

3.8 (4)

Steel tracer, steel walls

T-PEPT

5

2.56 (14)

2.90 (14)

2.66 (14)

PEPT-ML

4

4.2 (4)

5.1 (4)

4.3 (4)

BHAM Method

3

7.4 (8)

9.2 (8)

7.9 (8)