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Article History

Received: 29 June 2020

Revised: 20 December 2020

Accepted: 28 December 2020

First Online: 27 January 2021

Competing interests

: The authors declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: NTNU and St. Olavs hospital, Trondheim University Hospital may benefit financially from a commercialization of the ultrasound equipment through future possible intellectual properties; this may include financial benefits to authors of this article. H.T. and S.A.N. are co‐inventors of NeoDoppler and have part-time positions in CIMON Medical, the company that is responsible for commercialization of NeoDoppler. H.T. and S.A.N. are among the shareholders in CIMON Medical. S.S.Ø. and A.H.J. declare no conflict of interest.

: Written informed consent was obtained from the parents of the neonates participating in the study. A separate written informed consent was obtained from the mother of the neonate in Fig. 1, she reviewed the photos and agreed for the use in scientific publication.