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EJNMMI Physics

Table 2 DNM 530c and DSPECT concordance correlation coefficients for motion

From: Left ventricular function assessment using 123I/99mTc dual-isotope acquisition with two semi-conductor cadmium–zinc–telluride (CZT) cameras: a gated cardiac phantom study

Motion   Pearson’s   Bland Altman
r [95 % CI] CCC [95 % CI] C.b Mean diff. [95 % CI] Regression R 2
 Acquisition Isotope       
  Single 123I 0.94 [0.89–0.96] 0.93 [0.89–0.96] 0.99 0.06 [−2.15;2.28] y = 0.123x − 0.764 0.107
99mTc 0.95 [0.92–0.97] 0.94 [0.91–0.97] 0.99 0.23 [−1.48;1.94] y = 0.088x − 0.354 0.071
  Dual 123I 0.90 [0.83–0.94] 0.88 [0.81–0.93] 0.98 −0.15 [−2.8;2.5] y = −0.188x + 1.13 0.144
99mTc 0.94 [0.90–0.97] 0.94 [0.9–0.97] 1 0.03 [−1.81;1.87] y = −0.007x + 0.076 0
 Camera
  DSPECT 123I 0.91 [0.86–0.95] 0.89 [0.83–0.93] 0.98 0.08 [−2.57;2.72] y = 0.248x − 1.599 0.271
99mTc 0.97 [0.95–0.98] 0.97 [0.95–0.98] 1 0.22 [−1.74; 2.18] y = −0.003x + 0.239 0
  DNM 530c 123I 0.94 [0.90–0.97] 0.94 [0.9–0.97] 1 −0.14 [−2.11;1.84] y = −0.061x + 0.276 0.031
99mTc 0.97 [0.96–0.99] 0.97 [0.95–0.98] 1 −0.01 [−1.29;1.26] y = −0.089x + 0.576 0.135
  1. Bland–Altman mean difference (mean diff), regression, and R 2
  2. r, Pearson’s correlation (precision); CCC, Lin’s concordance correlation; C.b, r/CCC = bias factor (trueness)
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