{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,4]],"date-time":"2025-11-04T10:35:53Z","timestamp":1762252553138,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2017,6,9]],"date-time":"2017-06-09T00:00:00Z","timestamp":1496966400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005416","name":"Norges Forskningsr\u00e5d","doi-asserted-by":"publisher","award":["247697"],"award-info":[{"award-number":["247697"]}],"id":[{"id":"10.13039\/501100005416","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Falls in homes of the elderly, in residential care facilities and in hospitals commonly occur in close proximity to the bed. Most approaches for recognizing falls use cameras, which challenge privacy, or sensor devices attached to the bed or the body to recognize bedside events and bedside falls. We use data collected from a ceiling mounted 80 \u00d7 60 thermal array combined with an ultrasonic sensor device. This approach makes it possible to monitor activity while preserving privacy in a non-intrusive manner. We evaluate three different approaches towards recognizing location and posture of an individual. Bedside events are recognized using a 10-second floating image rule\/filter-based approach, recognizing bedside falls with 98.62% accuracy. Bed-entry and exit events are recognized with 98.66% and 96.73% accuracy, respectively.<\/jats:p>","DOI":"10.3390\/s17061342","type":"journal-article","created":{"date-parts":[[2017,6,9]],"date-time":"2017-06-09T10:29:59Z","timestamp":1497004199000},"page":"1342","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Recognizing Bedside Events Using Thermal and Ultrasonic Readings"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1246-7930","authenticated-orcid":false,"given":"Danielsen","family":"Asbj\u00f8rn","sequence":"first","affiliation":[{"name":"UiT\u2014The Arctic University of Norway, 8505 Narvik, Norway"}]},{"given":"Torresen","family":"Jim","sequence":"additional","affiliation":[{"name":"UiO\u2014University of Oslo, 0373 Oslo, Norway"}]}],"member":"1968","published-online":{"date-parts":[[2017,6,9]]},"reference":[{"key":"ref_1","unstructured":"Public Health Agency of Canada (2017, June 08). Report on Seniors\u2019 fall in Canada, Available online: http:\/\/publications.gc.ca\/collections\/Collection\/HP25-1-2005E.pdf."},{"key":"ref_2","unstructured":"Public Health Agency of Canada (2017, June 08). Senior\u2019s fall in Canada\u2014Second Report, Available online: http:\/\/www.phac-aspc.gc.ca\/seniors-aines\/publications\/public\/injury-blessure\/seniors_falls-chutes_aines\/assets\/pdf\/seniors_falls-chutes_aines-eng.pdf."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2390","DOI":"10.1056\/NEJMp0900963","article-title":"Medicare nonpayment, hospital falls, and unintended consequences","volume":"360","author":"Inouye","year":"2009","journal-title":"New Eng. J. Med."},{"key":"ref_4","unstructured":"(2017, June 08). Making Health Care Safer: A Critical Analysis of Patient Safety Practices, Available online: http:\/\/archive.ahrq.gov\/clinic\/ptsafety\/pdf\/ptsafety.pdf."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"90","DOI":"10.1046\/j.1532-5415.2002.50013.x","article-title":"Siderail use and bed-related fall outcomes among nursing home residents","volume":"50","author":"Capezuti","year":"2002","journal-title":"J. Am. Geriatr. Soc."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"187.e1","DOI":"10.1016\/j.jamda.2011.06.011","article-title":"Epidemiology of falls in residential aged care: Analysis of more than 70,000 falls from residents of Bavarian nursing homes","volume":"13","author":"Rapp","year":"2012","journal-title":"J. Am. Med. Dir. Assoc."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"379","DOI":"10.5694\/j.1326-5377.2006.tb00286.x","article-title":"Sustained reduction in serious fall-related injuries in older people in hospital","volume":"184","author":"Fonda","year":"2006","journal-title":"Med. J. Aust."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"529","DOI":"10.1111\/j.1532-5415.1999.tb02565.x","article-title":"An analysis of falls in the hospital: Can we do without bedrails?","volume":"47","author":"Hanger","year":"1999","journal-title":"J. Am. Geriatr."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1174","DOI":"10.1097\/00005650-200012000-00004","article-title":"Environmental Hazards and the Risk of Nonsyncopal Falls in the Homes of Community-Living Older Persons","volume":"38","author":"Gill","year":"2000","journal-title":"Med. Care"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"a2227","DOI":"10.1136\/bmj.a2227","article-title":"Inability to get up after falling, subsequent time on floor, and summoning help: Prospective cohort study in people over 90","volume":"337","author":"Fleming","year":"2008","journal-title":"BMJ"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1016\/j.archger.2008.04.007","article-title":"Bed-exit alarm effectiveness","volume":"49","author":"Capezuti","year":"2009","journal-title":"Arch. Gerontol. Geriat."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"36","DOI":"10.13189\/nh.2013.010204","article-title":"Bed-Leaving Detection Using Piezoelectric Unrestrained Sensors and Its Measurement System Regarding QOL","volume":"1","author":"Madokoro","year":"2013","journal-title":"Nurs. Health"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"692","DOI":"10.7326\/0003-4819-157-10-201211200-00005","article-title":"Effects of an intervention to increase bed alarm use to prevent falls in hospitalized patients: A cluster randomized trial","volume":"157","author":"Shorr","year":"2012","journal-title":"Ann. Intern. Med."},{"key":"ref_14","first-page":"522","article-title":"Falls prevention: The efficacy of a bed alarm system in an acute-care setting","volume":"60","author":"Tideiksaar","year":"1993","journal-title":"Mt. Sinai J. Med."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1016\/j.ijmedinf.2010.10.007","article-title":"Detection of bed-exit events using a new wireless bed monitoring assistance","volume":"80","author":"Bruyneel","year":"2011","journal-title":"Int. J. Med. Inform."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"253","DOI":"10.1097\/NCQ.0000000000000054","article-title":"Feasibility, Acceptability, and Effectiveness of an Electronic Sensor Bed\/Chair Alarm in Reducing Falls in Patients with Cognitive Impairment in a Subacute Ward","volume":"29","author":"Shee","year":"2014","journal-title":"J. Nurs. Care Qual."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1912","DOI":"10.1001\/jama.2010.1567","article-title":"Fall Prevention in Acute Care Hospitals: A Randomized Trial","volume":"304","author":"Dykes","year":"2010","journal-title":"JAMA J. Am. Med. Assoc."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"184","DOI":"10.1016\/j.jbi.2016.08.016","article-title":"Increasing fall risk awareness using wearables: A fall risk awareness protocol","volume":"63","author":"Danielsen","year":"2016","journal-title":"J. Biomed. Inform."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"530","DOI":"10.1177\/0017896913499266","article-title":"Falls prevention education for older adults during and after hospitalization: A systematic review and meta-analysis","volume":"73","author":"Lee","year":"2014","journal-title":"Health Educ. J."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1097\/NCQ.0b013e318194fd7c","article-title":"Patient and family education for fall prevention: Involving patients and families in a fall prevention program on a neuroscience unit","volume":"24","author":"Ryu","year":"2009","journal-title":"J. Nurs. Care Qual."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1007\/978-3-319-48746-5_2","article-title":"Non-intrusive bedside event recognition using infrared array and ultrasonic sensor","volume":"10069","author":"Danielsen","year":"2016","journal-title":"Lect. Notes Comput."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1016\/j.gaitpost.2013.06.009","article-title":"Low cost and batteryless sensor-enabled radio frequency identification tag based approaches to identify patient bed entry and exit posture transitions","volume":"39","author":"Ranasinghe","year":"2014","journal-title":"Gait Posture"},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Ni, B., Nguyen, C.D., and Moulin, P. (2012, January 25\u201330). RGBD-camera based get-up event detection for hospital fall prevention. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, Kyoto, Japan.","DOI":"10.1109\/ICASSP.2012.6287947"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"13","DOI":"10.3928\/00989134-20131126-01","article-title":"Automated Fall Detection with Quality Improvement \u201cRewind\u201d to Reduce Falls in Hospital Rooms","volume":"40","author":"Rantz","year":"2014","journal-title":"J. Gerontol. Nurs."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"42","DOI":"10.1109\/MPRV.2004.1316817","article-title":"A Smart Sensor to Detect the Falls of the Elderly","volume":"3","author":"Sixsmith","year":"2004","journal-title":"IEEE Pervas. Comput."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Mashiyama, S., Hong, J., and Ohtsuki, T. (2014, January 2\u20135). A fall detection system using low resolution infrared array sensor. Proceedings of the IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, Washington, DC, USA.","DOI":"10.1109\/PIMRC.2014.7136520"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1007\/978-3-319-48799-1_10","article-title":"Fall Detection Through Thermal Vision Sensing","volume":"10070","author":"Rafferty","year":"2016","journal-title":"Lect. Notes Comput."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Kido, S., Miyasaka, T., Tanaka, T., Shimizu, T., and Saga, T. (2009, January 29). Fall detection in toilet rooms using thermal imaging sensors. Proceedings of the 2009 IEEE\/SICE International Symposium on System Integration (SII), Tokyo, Japan.","DOI":"10.1109\/SI.2009.5384550"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Wong, W.K., Lim, H.L., Loo, C.K., and Lim, W.S. (2010, January 7\u201310). Home Alone Faint Detection Surveillance System Using Thermal Camera. Proceedings of the Second International Conference on Computer Research and Development, Kuala Lumpur, Malaysia.","DOI":"10.1109\/ICCRD.2010.163"},{"key":"ref_30","unstructured":"(2017, June 08). Beagleboard.org (BeagleBone Black). Available online: https:\/\/beagleboard.org\/black."},{"key":"ref_31","unstructured":"(2017, June 08). FLIR LEPTON\u00ae Longwave Infrared (LWIR) Camera Module. Available online: http:\/\/www.flir.com\/uploadedFiles\/CVS_Americas\/Cores_and_Components_NEW\/Resources\/flir-lepton-datasheet.pdf."},{"key":"ref_32","unstructured":"(2017, June 08). I2CXL-MaxSonar\u00ae EZTM Series Datasheet. Available online: http:\/\/www.maxbotix.com\/documents\/I2CXL-MaxSonar-EZ_Datasheet.pdf."},{"key":"ref_33","unstructured":"(2017, June 08). FLIR Lepton\u00ae Camera Breakout 1.4. Available online: http:\/\/www.flir.com\/uploadedFiles\/CVS_Americas\/Cores_and_Components_NEW\/Resources\/flir-lepton-breakout-product-brief.pdf."},{"key":"ref_34","unstructured":"Quinlan, J.R. (1993). C4.5: Programs for Machine Learning, Morgan Kaufmann Publishers Inc."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/6\/1342\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:38:33Z","timestamp":1760207913000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/6\/1342"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,6,9]]},"references-count":34,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2017,6]]}},"alternative-id":["s17061342"],"URL":"https:\/\/doi.org\/10.3390\/s17061342","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2017,6,9]]}}}