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Med. Robot. Res."],"published-print":{"date-parts":[[2018,9]]},"abstract":"<jats:p>By intervening during the early stage of gestation, fetal surgeons aim to correct or minimize the effects of congenital disorders. As compared to postnatal treatment of these disorders, such early interventions can often actually save the life of the fetus and also improve the quality of life of the newborn. However, fetal surgery is considered one of the most challenging disciplines within Minimally Invasive Surgery (MIS), owing to factors such as the fragility of the anatomic features, poor visibility, limited manoeuvrability, and extreme requirements in terms of instrument handling with precise positioning. This work is centered on a fetal laser surgery procedure treating placental disorders. It proposes the use of haptic guidance to enhance the overall safety of this procedure and to simplify instrument handling. A method is described that provides effective guidance by installing a forbidden region virtual fixture over the placenta, thereby safeguarding adequate clearance between the instrument tip and the placenta. With a novel application of all-optical ultrasound distance sensing in which transmission and reception are performed with fibre optics, this method can be used with a sole reliance on intraoperatively acquired data. The added value of the guidance approach, in terms of safety and performance, is demonstrated in a series of experiments with a robotic platform.<\/jats:p>","DOI":"10.1142\/s2424905x18410015","type":"journal-article","created":{"date-parts":[[2018,3,16]],"date-time":"2018-03-16T02:53:14Z","timestamp":1521168794000},"page":"1841001","source":"Crossref","is-referenced-by-count":16,"title":["Haptic Guidance Based on All-Optical Ultrasound Distance Sensing for Safer Minimally Invasive Fetal Surgery"],"prefix":"10.1142","volume":"03","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2118-7041","authenticated-orcid":false,"given":"Caspar","family":"Gruijthuijsen","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, KU Leuven, Belgium"}]},{"given":"Richard","family":"Colchester","sequence":"additional","affiliation":[{"name":"Department of Medical Physics &amp; Biomedical Engineering, University College London, UK"}]},{"given":"Alain","family":"Devreker","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, KU Leuven, Belgium"}]},{"given":"Allan","family":"Javaux","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, KU Leuven, Belgium"}]},{"given":"Efthymios","family":"Maneas","sequence":"additional","affiliation":[{"name":"Department of Medical Physics &amp; 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