<a href="http:&#x2F;&#x2F;www.dailymail.co.uk&#x2F;health&#x2F;article-2203114&#x2F;Pregnant-wife-inspires-engineer-build-affordable-hand-held-baby-scanner-save-thousands-lives.html" rel="nofollow">http:&#x2F;&#x2F;www.dailymail.co.uk&#x2F;health&#x2F;article-2203114&#x2F;Pregnant-w...</a><p><a href="https:&#x2F;&#x2F;vimeo.com&#x2F;49436607" rel="nofollow">https:&#x2F;&#x2F;vimeo.com&#x2F;49436607</a><p>Looks like they use one or just a few transducer and move it manually to reduce the cost.