The concept isn't new [1] but the low budget implementation is certainly quite clever. More advanced machines of this type are already in widespread use. The ar

The concept isn't new [1] but the low budget implementation is certainly quite clever. More advanced machines of this type are already in widespread use. The article makes it sound like it's a completely new concept. 1: https://pubmed.ncbi.nlm.nih.gov/24123050/ https://pubmed.ncbi.nlm.nih.gov/24123050/