Optimizing parameters of an open-source airway segmentation algorithm using different CT images

Nardelli, Pietro; Khan, Kashif A; Corvò, Alberto; Moore, Niamh; Murphy, Mary J; Twomey, Maria; O’Connor, Owen J; Kennedy, Marcus P; Estépar, Raúl San José; Maher, Michael M; Cantillon-Murphy, Pádraig

doi:10.1186/s12938-015-0060-2

BioMedical Engineering OnLine

Table 2 Percentage of trachea voxels used for different reconstruction kernels and slice thicknesses

From: Optimizing parameters of an open-source airway segmentation algorithm using different CT images

# of slices (S)	# of voxels (N)	Percentage
STD, B20f, B30f, B, C, FC10, FC12^a
\(S \le 300\)	N \(>\) \(5\times 10^4\)	0.5
	\(2\times 10^4\) \(<\) \(N \le 5\times 10^4\)	0.75
	\(N \le 2\times 10^4\)	0.9
300 \(<\) \(S \le 400\)	N \(>\) \(10^5\)	0.5
	\(8.5\times 10^4\) \(<\) N \(\le \ 10^5\)	0.75
	\(N \le 8.5\times 10^4\)	0.9
S \(>\) 400	N \(>\) \(17\times 10^4\)	0.5
	\(14\times 10^4\) \(<\) \(N \le 17\times 10^4\)	0.75
	\(N \le 14\times 10^4\)	0.9
LUNG, B50f, FC50, FC52^b
\(S \le 300\)	N \(>\) \(8.5\times 10^4\)	0.2
	\(7.5\times 10^4\) \(<\) \(N \le 8.5\times 10^4\)	0.3
	\(3.5\times 10^4\) \(<\) \(N \le 7.5\times 10^4\)	0.35
	\(10^4\) \(<\) \(N \le 3.5\times 10^4\)	0.5
	\(N \le 10^4\)	0.8
300 \(<\) \(S \le 400\)	N \(>\) \(12\times 10^4\)	0.2
	\(10^5\) \(<\) \(N \le 12\times 10^4\)	0.35
	\(8.5\times 10^4\) \(<\) \(N \le 10^5\)	0.5
	\(N \le 8.5\times 10^4\)	0.7
S \(>\) 400	N \(>\) \(14\times 10^4\)	0.2
	\(11.5\times 10^4\) \(<\) \(N \le 14\times 10^4\)	0.35
	\(8\times 10^4\) \(<\) \(N \le 11.5\times 10^4\)	0.5
	\(N \le 8\times 10^4\)	0.75
B60f, B70f, B70s, D^c
\(S \le 300\)	N \(>\) \(9\times 10^4\)	0.35
	\(6\times 10^4\) \(<\) \(N \le 9\times 10^4\)	0.5
	\(3\times 10^4\) \(<\) \(N \le 6\times 10^4\)	0.6
	\(N \le 3\times 10^4\)	0.8
S \(>\) 300	N \(>\) \(12\times 10^4\)	0.25
	\(8\times 10^4\) \(<\) \(N \le 12\times 10^4\)	0.4
	\(5\times 10^4\) \(<\) \(N \le 8\times 10^4\)	0.6
	\(N \le 5\times 10^4\)	0.8
Any other Kernel^d
\(S \le 300\)	N \(>\) \(9\times 10^4\)	0.35
	\(4\times 10^4\) \(<\) \(N \le 9\times 10^4\)	0.55
	\(N \le 4\times 10^4\)	0.8
S \(>\) 300	N \(>\) \(13\times 10^4\)	0.3
	\(7\times 10^4\) \(<\) \(N \le 13\times 10^4\)	0.55
	\(N \le 7\times 10^4\)	0.8

S is used to take into account the different slice thicknesses.
^aKernels: GE Medical System Standard, Siemens B20f and B30f, Philips B and C, Toshiba FC10 and FC12.
^bKernels: GE Medical System Lung, Siemens B50f, Toshiba FC50 and FC52.
^cKernels: Siemens B60f, B70f and B70s, and Philips D.
^dAny other kernel.

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ISSN: 1475-925X

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