Table 2.

RSA parameters and equipment used during image acquisition and analysis.

Parameter	Value
Precision of arrangement:	Valid for METHA
Translation (Tx, Ty, Tz)	Tx: 0.014 ± 0.086, Ty: −0.019 ± 0.147, Tz: −0.046 ± 0.229
Rotation (Rx, Ry, Rz)	Rx: 0.03 ± 0.77, Ry: 0.09 ± 3.12, Rz: −0.01 ± 0.21
Calibration cage	Carbon Box Leiden 10 Hannover
X-ray tubes	2x SRO3310 ROT 360 (Philips)
Tube voltage/current	90 kV/12.5 mAs
Angle between X-ray paths	40 deg
X-ray cassette	36 × 43 cm IP Cassette Type CC (Fuji)
Cassette digitizer	PCR Eleva Corado (Philips), resolution: 125 dpi
Condition number cut-off threshold	120
Mean rigid body error threshold	0.35 mm
RSA software version	Medis Specials Model Based RSA 3.2/3.31