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Background: Use of diagnostic thoracic ultrasound (TUS) in medical professions to examine the pleura, lung parenchyma and diaphragm is gaining in popularity, however the ways in which physiotherapists are using TUS is unclear., Objective: The aim of this scoping review is to gain an understanding of the emerging evidence base surrounding physiotherapy use of TUS to inform research and clinical practice., Data Sources: A systematic search was conducted of the following databases: Cochrane, EPPI centre, PROSPERO, Medline, CINAHL, AMED, EMBASE, HMIC, and BNI., Study Selection: Inclusion criteria: primary research reporting the use of diagnostic TUS; a physiotherapist as part of the study design or as the chief investigator; published in English., Synthesis Methods: Data regarding demographics, design, type of conditions and anatomical structures investigated and profession leading the TUS of included papers were compiled in a tabular format., Results: Of the 26 included papers, nine studied healthy participants, four studied COPD and four studied critical care patients. Most papers (n=23) involved scanning the diaphragm. In eight studies the physiotherapist operated the TUS., Limitations: The paper selection process was performed by one author; with no cross-checking by another individual., Conclusion: Use of TUS by physiotherapists is an emerging area in both diaphragm and lung diagnostics. A wide range of patient populations may benefit from physiotherapists using TUS. Papers in this review are heterogeneous making any generalisability difficult but does show its potential for varied uses. TUS is an innovative skill in the hands of physiotherapists, but more research is needed., (Crown Copyright © 2018. Published by Elsevier Ltd. All rights reserved.)