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Table 2 Summary of CACT IQ evaluation criteria

From: Effectuality study of a 3D motion correction algorithm in C-arm CTs of severely impaired image quality during transarterial chemoembolization

Overall IQ

Grading

1: Good

2 Moderate

3: Poor

Vessel visualization

Grading

1: clear visualization of all hepatic arteries including fine peripheral hepatic arteries at the subcapsular region without blurring

2: clear visualization of hepatic arteries up to subsegmental level without blurring, but indisctinct fine peripheral hepatic arteries at the subcapsular region

3: blurriness of hepatic arteries but traceable up to subsegmental level

4: moderate blurring of hepatic arteries with pruning of subsegmental arteries

5: severe blurring of hepatic arteries with difficulty in tracing segmental hepatic arteries

Presence of (cardiorespiratory) artifacts

 - Diaphragmatic motion d

Definition: Motion artifact width of right hemidiaphragm on sagittal image

  Grading

0: none (< 0.1 mm)

1: mild (0.1- 2 mm)

2: moderate (2.1–3.5 mm)

3:severe (> 3.5 mm)

Hepatic artery-to-parenchyma ratio

Definition: Ratio of intraarterial HU value 2 cm distally to the catheter tip (ROI fitted to two thirds of the vessel diameter) and maximal parenchymal enhancement

Preferred dataset for TACE

CACTOrg vs. CACTMC_no bone

Need for additional imaging

Yes/no

  1. Abbreviations: CACTOrg original C-Arm CT, CACTMC_no boneC-arm CT after motion correction and bone segmentation, HU Hounsfield Units, IQ Image quality, ROI region of interest, TACE transarterial chemoembolization