title: A telemedicine system for collaborative work on radiographic coronary video-images.
abstract: We designed a telemedicine system that supports collaborative work on video-images from coronary cine-angiograms and cine-ventriculograms. Two workstations were connected by ISDN at 128 kbit/s. Coronary cine-angiogram and cine-ventriculogram video-images were transmitted to an image examination workstation before the images were required for analysis (i.e. in a 'pre-fetch' operation). If one workstation changed even a single frame in a video-sequence, then the change was transmitted to the other workstation, rather than the entire video-sequence. To evaluate the performance of the system, the diagnoses made by five cardiology specialists were compared with those recorded in the original report. Coronary cine-angiogram and cine-ventriculogram video-images from 27 patients were used. The cardiologists, who were blinded to the patient information, regenerated the video-images on the workstation and assessed coronary arterial stenosis and wall motion. The kappa scores for clinician agreement with the original reports for ratings of stenosis were 0.54-0.66 and for wall motion were 0.41-0.69. The system performed reasonably reliably and it therefore appears likely to be useful in telemedicine work.
authors.affiliation: Medical Information and Management Science, Nagoya University Graduate School of Medicine, Nagoya, Japan. changr@med.nagoya-u.ac.jp
authors.forename: Run
authors.initials: R
authors.lastname: Zhang
authors.forename: Kazunobu
authors.initials: K
authors.lastname: Yamauchi
authors.forename: Makoto
authors.initials: M
authors.lastname: Nonogawa
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Ikeda
authors.forename: Wenping
authors.initials: W
authors.lastname: Zhang
authors.forename: Damin
authors.initials: D
authors.lastname: Huang
mesh_terms: D002932:Cineangiography; D003299:Cooperative Behavior; D017023:Coronary Angiography; D023921:Coronary Stenosis / Q000000981:diagnostic imaging*; D006801:Humans; D007564:Japan; D015203:Reproducibility of Results; D019112:Teleradiology / Q000379:methods* / Q000458:organization & administration