Table 3.

Comparison of ${\text{ITV}}_{\text{PET}}$ with ${\text{ITV}}_{\text{CT}}$ for different segmentation methods

Notation	$\mathit{\text{Volume}}\pm \mathit{\text{SEM}}\left({\mathit{\text{cm}}}^3\right)$	p‐value	$({\mathit{\text{ITV}}}_{\mathit{\text{PET}}}-{\mathit{\text{ITV}}}_{\mathit{\text{CT}}})\pm \mathit{\text{SEM}}$	Percent Difference (%)
${\text{ITV}}_{15\%}$ a	$10.93\pm 2.71$	0.01 c	$+1.05\pm 0.89$	$\pm 10.7\%$
${\text{ITV}}_{35\%}$	$4.15\pm 0.99$	$<0.01$ c	$-4.17\pm 1.24$	$-50.1\%$
${\text{ITV}}_{42\%}$	$3.12\pm 3.93$	$<0.01$ c	$-5.21\pm 1.38$	$-62.5\%$
${\text{ITV}}_{2.5}$ b	$6.93\pm 2.14$	$<0.01$ c	$-1.99\pm 0.73$	$-22.3\%$
${\text{ITV}}_{2.5}$	$6.36\pm 1.67$	0.14	$-1.96\pm 0.60$	$-23.6\%$
${\text{ITV}}_{\text{SUVmean}}$	$7.02\pm 1.67$	0.33	$-1.30\pm 0.65$	$-15.7\%$
${\text{ITV}}_{\text{VMSBR}}$	$7.89\pm 1.76$	0.39	$-0.43\pm 0.55$	$-5.15\%$
${\text{ITV}}_{\text{CT}}$	$8.32\pm 2.16$	—	—	—

^{a a} $\mathrm{N}=18$. Statistics calculated using paired values.

^{b b} $\mathrm{N}=22$.

^{c c} Statistically significant differences.

$\text{SEM}=\text{standard error of the mean}$.