Ultrafast Cone-Beam Computed Tomography: A Comparative Study of Imaging Protocols during Image-Guided Therapy Procedure

Table 1

Described specifications of the clinical imaging parameters and contrast material injection protocol used for the ultrafast cone-beam CT imaging of patients during transarterial chemoembolization treatment.

Imaging parameters	Acquisition protocol 1	Acquisition protocol 2
Set kilo-voltage	90 kV	90 kV
Number of images	133	166
Angular increment (°/ima)	1.5	1.2
Maximum CBCT speed (°/s)	100	88.8
Maximum readout speed (ima/s)	67	74
Total acquisition time (s)	2.54	2.72
Detector entrance dose (uGy/frame)	0.36	0.36
Contrast injection parameters	Injection protocol 1	Injection protocol 2
Contrast volume (mL)	6	7
Iodine/mL	320	320
Saline (mL)	12	20
Flow rate (mL/s)	3	3
X-ray delay (s)	3	6
Injection duration (s)	6	9