Automated Software Analysis of Fetal Movement Recorded during a Pregnant Woman’s Sleep at Home
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{"title"=>"Automated software analysis of fetal movement recorded during a pregnant woman's sleep at home", "type"=>"journal", "authors"=>[{"first_name"=>"Kyoko", "last_name"=>"Nishihara", "scopus_author_id"=>"8158112600"}, {"first_name"=>"Noboru", "last_name"=>"Ohki", "scopus_author_id"=>"36892670300"}, {"first_name"=>"Hideo", "last_name"=>"Kamata", "scopus_author_id"=>"55181845500"}, {"first_name"=>"Eiji", "last_name"=>"Ryo", "scopus_author_id"=>"6701457730"}, {"first_name"=>"Shigeko", "last_name"=>"Horiuchi", "scopus_author_id"=>"7202164034"}], "year"=>2015, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"605586053", "pmid"=>"26083422", "doi"=>"10.1371/journal.pone.0130503", "issn"=>"19326203", "scopus"=>"2-s2.0-84939215063", "sgr"=>"84939215063", "isbn"=>"1932-6203"}, "id"=>"8c8d892b-715d-32c5-bf65-aab14bafb4ef", "abstract"=>"Fetal movement is an important biological index of fetal well-being. Since 2008, we have been developing an original capacitive acceleration sensor and device that a pregnant woman can easily use to record fetal movement by herself at home during sleep. In this study, we report a newly developed automated software system for analyzing recorded fetal movement. This study will introduce the system and compare its results to those of a manual analysis of the same fetal movement signals (Experiment I). We will also demonstrate an appropriate way to use the system (Experiment II). In Experiment I, fetal movement data reported previously for six pregnant women at 28-38 gestational weeks were used. We evaluated the agreement of the manual and automated analyses for the same 10-sec epochs using prevalence-adjusted bias-adjusted kappa (PABAK) including quantitative indicators for prevalence and bias. The mean PABAK value was 0.83, which can be considered almost perfect. In Experiment II, twelve pregnant women at 24-36 gestational weeks recorded fetal movement at night once every four weeks. Overall, mean fetal movement counts per hour during maternal sleep significantly decreased along with gestational weeks, though individual differences in fetal development were noted. This newly developed automated analysis system can provide important data throughout late pregnancy. Copyright:", "link"=>"http://www.mendeley.com/research/automated-software-analysis-fetal-movement-recorded-during-pregnant-womans-sleep-home", "reader_count"=>15, "reader_count_by_academic_status"=>{"Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>1, "Other"=>2, "Student > Master"=>3, "Student > Bachelor"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>1, "Other"=>2, "Student > Master"=>3, "Student > Bachelor"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>8, "Nursing and Health Professions"=>1, "Medicine and Dentistry"=>1, "Agricultural and Biological Sciences"=>2, "Neuroscience"=>1, "Physics and Astronomy"=>1, "Design"=>1}, "reader_count_by_subdiscipline"=>{"Design"=>{"Design"=>1}, "Engineering"=>{"Engineering"=>8}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>1}, "Neuroscience"=>{"Neuroscience"=>1}, "Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>2}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>1}}, "group_count"=>2}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/2119613"], "description"=>"<p>The heavy blue lines at the bottom indicate fetal movement identified by the automated analysis software. The heavy red lines indicate rejections. The two upper lines show maternal movement. The two lower lines show fetal movement. For each pair, the upper line is from the accelerometer after passing the filters, and the lower line is the modification (integral). One grid mark indicates one second with 20 or 60 seconds per screen. <b>A:</b> This shows fetal movement and the influence of the maternal heartbeat in the FM channel (29 yrs, 32 gestational weeks). Since there is no movement by the mother, the signals on the FM channel are recorded as fetal movement. <b>B:</b> This shows maternal movement influencing the fetal movement channel. In this case (29 yrs, 32 gestational weeks), the signals on the FM channel include both maternal and fetal movements, so the maternal movement is excluded by the software. <b>C:</b> This shows periodic leg movements by a mother (26 yrs, 24 gestational weeks) and their influence on the fetal signal. Here the mother (upper two lines) has periodic leg movement at intervals of 20 to 40 seconds. The screen shows 60 seconds. Two (thigh) movements are seen in the top line for the mother. They influence the abdomen through vibration, reflected in the modified signal (integral) shown in the second line. In cases such as this, the mother's body movement signals can be removed by the analysis software.</p>", "links"=>[], "tags"=>["Home Fetal movement", "capacitive acceleration sensor", "Fetal Movement Recorded", "Automated Software Analysis", "pabak", "Experiment II"], "article_id"=>1451713, "categories"=>["Biological Sciences"], "users"=>["Kyoko Nishihara", "Noboru Ohki", "Hideo Kamata", "Eiji Ryo", "Shigeko Horiuchi"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130503.g003", "stats"=>{"downloads"=>2, "page_views"=>3, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Fetal_movement_signals_and_maternal_artifacts_/1451713", "title"=>"Fetal movement signals and maternal artifacts.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-17 03:14:07"}
  • {"files"=>["https://ndownloader.figshare.com/files/2119616"], "description"=>"<p>This figure shows maternal respiration influencing the FM channel (37 yrs, 36 gestational weeks). One grid mark indicates one second with 60 seconds per screen. The upper window shows the influence of the mother's breathing (3–5 sec intervals). We made two functions in order to remove respiration artifacts and explained in Step 3. The final decision is shown by the heavy blue line; the red lines indicate removal by the minimal threshold level.</p>", "links"=>[], "tags"=>["Home Fetal movement", "capacitive acceleration sensor", "Fetal Movement Recorded", "Automated Software Analysis", "pabak", "Experiment II"], "article_id"=>1451716, "categories"=>["Biological Sciences"], "users"=>["Kyoko Nishihara", "Noboru Ohki", "Hideo Kamata", "Eiji Ryo", "Shigeko Horiuchi"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130503.g004", "stats"=>{"downloads"=>5, "page_views"=>12, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Maternal_respiration_movement_/1451716", "title"=>"Maternal respiration movement.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-17 03:14:07"}
  • {"files"=>["https://ndownloader.figshare.com/files/2119618"], "description"=>"<p>This figure shows fetal hiccup movements (29 yrs, 32 gestational weeks). Fetal hiccup movements are identified by the software and are not counted as fetal movement. The two bottom lines show the fetal hiccup movements, and the areas marked with heavy red lines are excluded. The heavy green line shows the overall period of hiccup movement, which generally ranges from 5 to 15 minutes.</p>", "links"=>[], "tags"=>["Home Fetal movement", "capacitive acceleration sensor", "Fetal Movement Recorded", "Automated Software Analysis", "pabak", "Experiment II"], "article_id"=>1451718, "categories"=>["Biological Sciences"], "users"=>["Kyoko Nishihara", "Noboru Ohki", "Hideo Kamata", "Eiji Ryo", "Shigeko Horiuchi"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130503.g005", "stats"=>{"downloads"=>2, "page_views"=>3, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Fetal_hiccup_movements_/1451718", "title"=>"Fetal hiccup movements.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-17 03:14:07"}
  • {"files"=>["https://ndownloader.figshare.com/files/2119619"], "description"=>"<p>The mean and SD of the agreement for the six subjects were 0.83 and 0.04, which can be interpreted as almost perfect.</p>", "links"=>[], "tags"=>["Home Fetal movement", "capacitive acceleration sensor", "Fetal Movement Recorded", "Automated Software Analysis", "pabak", "Experiment II"], "article_id"=>1451719, "categories"=>["Biological Sciences"], "users"=>["Kyoko Nishihara", "Noboru Ohki", "Hideo Kamata", "Eiji Ryo", "Shigeko Horiuchi"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130503.g006", "stats"=>{"downloads"=>5, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Agreement_between_manual_and_automated_detection_for_the_six_subjects_/1451719", "title"=>"Agreement between manual and automated detection for the six subjects.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-17 03:14:07"}
  • {"files"=>["https://ndownloader.figshare.com/files/2119621"], "description"=>"<p>Mean values for the number of fetal movements per hour at night decreased from 24 weeks to 36 weeks (p<0.02).There were significant differences in fetal movement counts per hour from week to week with large individual differences (p<0.001).</p>", "links"=>[], "tags"=>["Home Fetal movement", "capacitive acceleration sensor", "Fetal Movement Recorded", "Automated Software Analysis", "pabak", "Experiment II"], "article_id"=>1451721, "categories"=>["Biological Sciences"], "users"=>["Kyoko Nishihara", "Noboru Ohki", "Hideo Kamata", "Eiji Ryo", "Shigeko Horiuchi"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130503.g007", "stats"=>{"downloads"=>0, "page_views"=>8, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Fetal_movements_per_hour_from_week_to_week_during_gestation_/1451721", "title"=>"Fetal movements per hour from week to week during gestation.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-17 03:14:07"}
  • {"files"=>["https://ndownloader.figshare.com/files/2119607"], "description"=>"<p>The pregnant woman records fetal movement during her sleep at home. She can bring the SD data card to her medical facility or send it by the Internet. The analysis system itself is at the medical facility. The flow chart of the analysis system is explained in Section 3 of Methods. The mark (*) is also explained in Step 3 of Section 3. Broken lines are used for data that include many artifacts.</p>", "links"=>[], "tags"=>["Home Fetal movement", "capacitive acceleration sensor", "Fetal Movement Recorded", "Automated Software Analysis", "pabak", "Experiment II"], "article_id"=>1451708, "categories"=>["Biological Sciences"], "users"=>["Kyoko Nishihara", "Noboru Ohki", "Hideo Kamata", "Eiji Ryo", "Shigeko Horiuchi"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130503.g001", "stats"=>{"downloads"=>1, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_FMAM_recording_analysis_system_and_a_flow_chart_/1451708", "title"=>"The FMAM recording-analysis system and a flow chart.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-17 03:14:07"}
  • {"files"=>["https://ndownloader.figshare.com/files/2119610"], "description"=>"<p>This screen shot shows the basic feature of the software. <b>Part A</b>: A display of all gestational weeks can be seen with one click. <b>Part B:</b> These lines show modified movement signals (integral values) for the mother (above, in black) and the fetus (below, in blue) for one night. Light blue shows maternal wake time, and green shows fetal hiccup movements. <b>Part C:</b> These lines show the signal from the accelerometer (above) and integral (below) for the mother (top two lines) and the fetus (bottom two lines). This is for a 20-second period. The heavy blue line at the bottom indicates a significant moment. FM represents fetal movement. <b>Part F:</b> We can call up the results from any week. We can calculate the fetal parameters (for example, the number of fetal movements per night or per hour).</p>", "links"=>[], "tags"=>["Home Fetal movement", "capacitive acceleration sensor", "Fetal Movement Recorded", "Automated Software Analysis", "pabak", "Experiment II"], "article_id"=>1451710, "categories"=>["Biological Sciences"], "users"=>["Kyoko Nishihara", "Noboru Ohki", "Hideo Kamata", "Eiji Ryo", "Shigeko Horiuchi"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130503.g002", "stats"=>{"downloads"=>0, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Screen_shot_/1451710", "title"=>"Screen shot.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-17 03:14:07"}

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Relative Metric

{"start_date"=>"2015-01-01T00:00:00Z", "end_date"=>"2015-12-31T00:00:00Z", "subject_areas"=>[]}
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