. Author manuscript; available in PMC: 2020 Nov 1.

Published in final edited form as: IEEE Trans Med Imaging. 2019 Apr 23;38(11):2705–2715. doi: 10.1109/TMI.2019.2912791

Table I.

Tumor Localization Results

Method^a	Direction^b	Tumor Localization Error^c
FDK	x	1.2 ± 0.4 (0.4, 2.0)
	y	1.2 ± 0.4 (0.1, 2.3)
	z	1.5 ± 0.4 (0.7, 2.5)
	d	2.3 ± 0.5 (1.5,3.5)
TV	x	1.1 ± 0.3 (0.4, 1.7)
	y	1.2 ± 0.4 (0.5, 2.0)
	z	1.5 ± 0.4 (0.8, 3.1)
	d	2.3 ± 0.4 (1.5, 3.6)
TV+SR-CNN	x	0.4 ± 0.3 (0.0, 1.0)
	y	0.5 ± 0.3 (0.0, 1.0)
	z	0.7 ± 0.3 (0.1, 1.1)
	d	1.1 ± 0.2 (0.4, 1.4)

FDK is the under-sampled image reconstructed using FDK with ramp filter, TV is the under-sampled image reconstructed using TV regularization, and SR-CNN is the augmented TV image using the proposed SR-CNN.

x is the left-right (LR) direction, y is the anterior-posterior (AP) direction, z is the superior-inferior (SI) direction, and d is the 3D vector length of the errors.

tumor shift unit is millimeter (mm). The results are presented in mean ± standard deviation of the absolute errors, and the minimum and maximum absolute errors are listed in the brackets.