title: Time-quantified fetal movement detection with two-transducer data fusion.
abstract: OBJECTIVE
  Our purpose was to develop an automated ultrasound-based fetal movement detection system to better define fetal movements.
  
  
  METHODS
  One hundred one patients had fetal movements recorded over a 20-minute period. Results of movement detection by a single-transducer system (Russell 1) and a two-transducer fusion system (Russell 2) were compared with those of Hewlett-Packard (HP-M-1350-A), maternal perception, and expert ultrasonography review.
  
  
  RESULTS
  A total of 86,592 seconds of videotape was scored for fetal movement. Russell 2 had a second-per-second sensitivity of 57.21% compared with Russell 1 at 40.95%, the HP-M-1350-A at 31.44%, and maternal perception at 30.80%. Russell 2 detected 67.57% of discrete movements compared with 57.52%, 41.98%, and 37.92%, respectively, in other systems.
  
  
  CONCLUSIONS
  Russell 2 represents a significant improvement over existing systems in detection of fetal movements on a second-per-second basis.
authors.affiliation: Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
authors.forename: C L
authors.initials: CL
authors.lastname: Lowery
authors.forename: W A
authors.initials: WA
authors.lastname: Russell
authors.forename: J D
authors.initials: JD
authors.lastname: Wilson
authors.forename: R C
authors.initials: RC
authors.lastname: Walls
authors.forename: P
authors.initials: P
authors.lastname: Murphy
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005324:Fetal Movement; D005865:Gestational Age; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D014159:Transducers; D016216:Ultrasonography, Prenatal / Q000295:instrumentation*