Tracking Lung Tumors in Orthogonal X-Rays

Table 1

Performance comparison (in pixel) of different tracking algorithms. 3DR and 2DR are very robust and consistently achieve most accurate tracking results (the best tracking result is in bold).

	3DR	2DR	OF	PHOG	Pℓ1	Total displacement
	∼0.03 secs	∼0.06 secs	∼2.8 mins	∼3.2 secs	∼34.4 secs
Patient 1	0.78±0.34	𝟎.𝟓𝟐±𝟎.𝟐𝟗	2.15±0.79	1.63±0.36	3.28±1.30	8.03
Patient 2	2.61±1.62	2.27±1.37	2.12±0.90	𝟏.𝟖𝟖±𝟎.𝟗𝟔	7.54±3.99	7.76
Patient 3	0.83±0.42	𝟎.𝟕𝟎±𝟎.𝟑𝟖	1.10±0.43	2.06±2.11	3.39±0.83	10.47
Patient 4	2.86±1.48	2.67±1.41	4.20±1.10	𝟐.𝟓𝟒±𝟎.𝟖𝟒	4.38±1.59	10.98
Patient 5	1.07±0.54	𝟎.𝟗𝟐±𝟎.𝟓𝟎	2.16±0.90	2.14±1.28	4.36±1.19	5.23
Patient 6	𝟎.𝟔𝟓±𝟎.𝟓𝟒	0.67±0.48	10.98±3.40	2.45±1.50	5.76±1.18	18.31
Patient 7	0.99±0.49	𝟎.𝟗𝟒±𝟎.𝟒𝟓	4.80±1.87	4.71±2.80	5.94±1.49	22.13
Patient 8	𝟎.𝟔𝟗±𝟎.𝟑𝟕	0.72±0.39	3.15±1.29	7.45±8.30	5.19±1.22	22.36
Patient 9	𝟎.𝟑𝟑±𝟎.𝟐𝟗	0.35±0.27	1.20±0.60	3.07±3.27	3.09±1.01	7.28
Patient 10	0.82±0.46	𝟎.𝟕𝟕±𝟎.𝟒𝟓	3.92±1.80	28.94±11.52	7.16±3.14	26.07