Table 1.

Data analysis – the current work. Note that the angular spacings for X‐ray marker at each offset are identical, since they are derived from the single reference radiograph.

Offset (mm)	Angular Spacing (degrees)		Deviation		Average Deviation (mm)
	X‐ray Marker	Dwell Positions	Angular Spacing (degrees)	Path Lengths (mm)
	39	46	7.0	1.8
	76	57	$-19.0$	$-5.0$
	112	106	$-6.0$	$-1.6$
	148	144	$-4.0$	$-1.0$
0	185	180	$-5.0$	$-1.3$	1.5
	222	216	$-6.0$	$-1.6$
	258	255	$-3.0$	$-0.8$
	294	290	$-4.0$	$-1.0$
	331	330	$-1.0$	$-0.3$
	39	48	9.0	2.4
	76	70	$-6.0$	$-1.6$
	112	109	$-3.0$	$-0.8$
	148	147	$-1.0$	$-0.3$
1	185	181	$-4.0$	$-1.0$	0.7
	222	219	$-3.0$	$-0.8$
	258	258	0.0	0.0
	294	295	1.0	0.3
	331	332	1.0	0.3
	39	47	8.0	2.1
	76	76	0.0	0.0
	112	116	4.0	1.0
	148	150	2.0	0.5
2	185	184	$-1.0$	$-0.3$	0.8
	222	224	2.0	0.5
	258	261	3.0	0.8
	294	298	4.0	1.0
	331	335	4.0	1.0
	39	47	8.0	2.1
	76	80	4.0	1.0
	112	118	6.0	1.6
	148	154	6.0	1.6
3	185	191	6.0	1.6	1.6
	222	229	7.0	1.8
	258	264	6.0	1.6
	294	302	8.0	2.1
	331	341	10.0	2.6
	39	49	10.0	2.6
	76	85	9.0	2.4
	112	121	9.0	2.4
	148	157	9.0	2.4
4	185	194	9.0	2.4	2.4
	222	231	9.0	2.4
	258	267	9.0	2.4
	294	77.2	307	80.4
	331	86.7	345	90.3