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

Table 2

Classification of grading score based on tumor delineation, vascular contrast material perfusion, and appearance of the artifacts.

Grading point score	Tumor delineation, vascular contrast material perfusion, and appearance of artifacts.
	Description
1	Not suitable for diagnosis (nondiagnostic image data)
2	Suboptimal contrast perfusion and tumor delineation, strong appearance of artifacts
3	Less than standard contrast perfusion and tumor delineation with hazy appearance of artifacts
4	Standard contrast perfusion and tumor delineation with hazy appearance of artifacts
5	Vascular contrast material perfusion and tumor delineation are higher than necessary with little or no artifacts