Table 2.

4D kinematic CT wrist scanning parameters compared to static high resolution 3D scan

Scan Mode	Slice thickness	Range	kV	mA	Rotation Time	Acquisition Time	Acquisition Interval	CTDIvol (mGy)	DLP (mGy-cm)	Effective Dose
Static high-resolution 3D scan
Volume	0.5 mm × 160	80 mm	120	100	0.5 s	NA	NA	4.1	32.4	0.67
4D Kinematic Dynamic Volume (Large patient or with metal in situ)
Dy-Volume	0.5 mm × 160	80 mm	100	100	0.5 s	5.5 s	Continuous	26.0	207.7	0.17
4D Kinematic Dynamic Volume (Average patient)
Dy-Volume	0.5 mm × 160	80 mm	80	80	0.5 s	5.5 s	Continuous	10.5	84.3	0.07

NA indicates not applicable; CTDIvol, CT dose index volume.