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Table 3 Number of mean correctly and wrongly detected markers for each threshold per dataset

From: Optimised passive marker device visibility and automatic marker detection for 3-T MRI-guided endovascular interventions: a pulsatile flow phantom study

Evaluated parameters of GRE images Median correctly detected markers (IQR) Median false positive detected markers (IQR)
Baseline sequence (a) 5.0 (5.0–5.0) 0.0 (0.0–0.0)
Conc. 12.5 mg/mL 4.3 (3.0–4.8) 0.0 (0.0–0.0)
Conc. 25 mg/mL 3.7 (3.5–3.8) 0.2 (0.1–0.2)
Conc. 50 mg/mL 2.4 (1.0–3.0) 0.0 (0.0–0.0)
Sequence b 5.0 (5.0–5.0) 0.0 (0.0–0.0)
Sequence c 5.0 (5.0–5.0) 0.0 (0.0–0.0)
Sequence d 3.9 (3.1–4.4) 0.0 (0.0–0.0)
ST 10 mm 5.0 (5.0–5.0) 0.0 (0.0–0.0)
PED parallel 4.0 (3.8–4.0) 0.0 (0.0–0.0)
  1. Conc. Concentration, GRE Gradient echo, IQR Interquartile range, PED Phase encoding direction, TE Echo time, TR Repetition time, ST Slice thickness
  2. aMaximum markers to be detected was 5. Baseline GRE sequence (a) and modified sequences (b, c, and d) are described in Table 1