Distance measuring navigation for fetoscopic laser photocoagulation to treat twin-to-twin transfusion syndrome

Feasibility evaluations

Hiromasa Yamashita, T. Yamashita, K. Masamune, H. Liao, K. Kim, T. Chiba, T. Dohi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper reports feasibility evaluations of a distance measuring navigation for fetoscopic laser photocoagulation (FLP) of placental anastmotic communicating vessels between twin fetuses to treat twin-to-twin transfusion syndrome (TTTS) in intrauterine fetal surgery. This navigation uses only a laser fiber for photocoagulation and a fiberscope for a fetoscope, which are usually used in conventional FLP, and a computer to analyzing the fetoscopic view including a laser fiber tip and a guide-spot of red diode-laser. From fiberscopic view, pixels between center of the fetoscopic circular view and center of the guide-spot irradiated from a laser fiber are automatically detected. These pixels can be converted to the real distance between fetoscope tip and target according to geometric and optical relation of a laser fiber and a fetoscope including warping correction. In distance measuring evaluation, measuring errors between the fiberscope tip and target plates were under ±1 mm around 10-mm distance from the target regardless of target angles (0-40 degrees) and colors. In conclusion, accuracy of our distance measuring navigation can provide more secure FLP in clinical use with minimum instruments.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy
Pages197-200
Number of pages4
Volume25
Edition6
DOIs
Publication statusPublished - 2009 Dec 1
Externally publishedYes
EventWorld Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy - Munich, Germany
Duration: 2009 Sep 72009 Sep 12

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy
CountryGermany
CityMunich
Period09/9/709/9/12

Fingerprint

Fiber lasers
Navigation
Lasers
Pixels
Surgery
Semiconductor lasers
Color

Keywords

  • Distance measuring
  • Fetoscopic view
  • Guide-spot
  • Selective laser photocoagulation
  • Twin-to-twin transfusion syndrome

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

Cite this

Yamashita, H., Yamashita, T., Masamune, K., Liao, H., Kim, K., Chiba, T., & Dohi, T. (2009). Distance measuring navigation for fetoscopic laser photocoagulation to treat twin-to-twin transfusion syndrome: Feasibility evaluations. In World Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy (6 ed., Vol. 25, pp. 197-200) https://doi.org/10.1007/978-3-642-03906-5-54

Distance measuring navigation for fetoscopic laser photocoagulation to treat twin-to-twin transfusion syndrome : Feasibility evaluations. / Yamashita, Hiromasa; Yamashita, T.; Masamune, K.; Liao, H.; Kim, K.; Chiba, T.; Dohi, T.

World Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy. Vol. 25 6. ed. 2009. p. 197-200.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yamashita, H, Yamashita, T, Masamune, K, Liao, H, Kim, K, Chiba, T & Dohi, T 2009, Distance measuring navigation for fetoscopic laser photocoagulation to treat twin-to-twin transfusion syndrome: Feasibility evaluations. in World Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy. 6 edn, vol. 25, pp. 197-200, World Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy, Munich, Germany, 09/9/7. https://doi.org/10.1007/978-3-642-03906-5-54
Yamashita H, Yamashita T, Masamune K, Liao H, Kim K, Chiba T et al. Distance measuring navigation for fetoscopic laser photocoagulation to treat twin-to-twin transfusion syndrome: Feasibility evaluations. In World Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy. 6 ed. Vol. 25. 2009. p. 197-200 https://doi.org/10.1007/978-3-642-03906-5-54
Yamashita, Hiromasa ; Yamashita, T. ; Masamune, K. ; Liao, H. ; Kim, K. ; Chiba, T. ; Dohi, T. / Distance measuring navigation for fetoscopic laser photocoagulation to treat twin-to-twin transfusion syndrome : Feasibility evaluations. World Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy. Vol. 25 6. ed. 2009. pp. 197-200
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