Review for 10.1186/s12876-021-01600-3 (2021)

Reviewer’s report
Title: 
Fluoroless intravascular ultrasound image-guided liver navigation in
porcine models
Version: 
1 
Date: 
10 Nov 2020
Reviewer's report:
I would like to congratulate the authors for this novel study which indeed has
great potential for clinical applications in both surgeries and ablations .
Spatial orientation, cannulating the intended hepatic vein each time,identification
of relevant vascular structures and their normal anatomical variations would be
challenging and difficult to master but potential benefits and lack of ionising
radiations 
do make the efforts to explore and learn this novel technique
worthwhile
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