A machine vision system with CCD cameras for patient positioning in radiotherapy

a preliminary report.

Tadamasa Yoshitake, Katsumasa Nakamura, Yoshiyuki Shioyama, Tomonari Sasaki, Ohga Saiji, Toshihiro Yamaguchi, Takashi Toba, Shigeo Anai, Hiromi Terashima, Hiroshi Honda

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

PURPOSE: To determine positioning accuracy of a machine vision system in radiotherapy. MATERIALS AND METHODS: The machine vision system was composed of 640 x 480 pixel CCD cameras and computerized control systems. For image acquisition, the phantom was set up for the reference position and a single CCD camera was positioned 1.5 m from the isocenter. The image data of the fiducial marker with 1.5 mm lead pellet on the lateral surface of the phantom was captured onto the CCD, and then the position of the marker was accurately calculated. The phantom was moved 0.25, 0.50, 0.75, 1.00, 2.00, and 3.00 mm from the reference position, using a micrometer head. The position of the fiducial marker was analyzed using a kilo-voltage fluoroscopic imaging system and a machine vision system. RESULTS: Using fluoroscopic images, the discrepancy between the actual movement of the phantom by micrometer heads and the measurement was found to be 0.12 +/- 0.05 mm (mean +/- standard deviation). In contrast, the detection of the movement by the machine vision system coincided with the discrepancy of 0.0067 +/- 0.0048 mm. CONCLUSION: This study suggests that the machine vision system can be used to measure small changes in patient position with a resolution of less than 0.1 mm.

元の言語英語
ページ(範囲)399-405
ページ数7
ジャーナルFukuoka igaku zasshi = Hukuoka acta medica
96
発行部数12
出版物ステータス出版済み - 1 1 2005

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Fiducial Markers
Patient Positioning
Radiotherapy
Head

All Science Journal Classification (ASJC) codes

  • Medicine(all)

これを引用

A machine vision system with CCD cameras for patient positioning in radiotherapy : a preliminary report. / Yoshitake, Tadamasa; Nakamura, Katsumasa; Shioyama, Yoshiyuki; Sasaki, Tomonari; Saiji, Ohga; Yamaguchi, Toshihiro; Toba, Takashi; Anai, Shigeo; Terashima, Hiromi; Honda, Hiroshi.

:: Fukuoka igaku zasshi = Hukuoka acta medica, 巻 96, 番号 12, 01.01.2005, p. 399-405.

研究成果: ジャーナルへの寄稿記事

Yoshitake, T, Nakamura, K, Shioyama, Y, Sasaki, T, Saiji, O, Yamaguchi, T, Toba, T, Anai, S, Terashima, H & Honda, H 2005, 'A machine vision system with CCD cameras for patient positioning in radiotherapy: a preliminary report.', Fukuoka igaku zasshi = Hukuoka acta medica, 巻. 96, 番号 12, pp. 399-405.
Yoshitake, Tadamasa ; Nakamura, Katsumasa ; Shioyama, Yoshiyuki ; Sasaki, Tomonari ; Saiji, Ohga ; Yamaguchi, Toshihiro ; Toba, Takashi ; Anai, Shigeo ; Terashima, Hiromi ; Honda, Hiroshi. / A machine vision system with CCD cameras for patient positioning in radiotherapy : a preliminary report. :: Fukuoka igaku zasshi = Hukuoka acta medica. 2005 ; 巻 96, 番号 12. pp. 399-405.
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abstract = "PURPOSE: To determine positioning accuracy of a machine vision system in radiotherapy. MATERIALS AND METHODS: The machine vision system was composed of 640 x 480 pixel CCD cameras and computerized control systems. For image acquisition, the phantom was set up for the reference position and a single CCD camera was positioned 1.5 m from the isocenter. The image data of the fiducial marker with 1.5 mm lead pellet on the lateral surface of the phantom was captured onto the CCD, and then the position of the marker was accurately calculated. The phantom was moved 0.25, 0.50, 0.75, 1.00, 2.00, and 3.00 mm from the reference position, using a micrometer head. The position of the fiducial marker was analyzed using a kilo-voltage fluoroscopic imaging system and a machine vision system. RESULTS: Using fluoroscopic images, the discrepancy between the actual movement of the phantom by micrometer heads and the measurement was found to be 0.12 +/- 0.05 mm (mean +/- standard deviation). In contrast, the detection of the movement by the machine vision system coincided with the discrepancy of 0.0067 +/- 0.0048 mm. CONCLUSION: This study suggests that the machine vision system can be used to measure small changes in patient position with a resolution of less than 0.1 mm.",
author = "Tadamasa Yoshitake and Katsumasa Nakamura and Yoshiyuki Shioyama and Tomonari Sasaki and Ohga Saiji and Toshihiro Yamaguchi and Takashi Toba and Shigeo Anai and Hiromi Terashima and Hiroshi Honda",
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AU - Yoshitake, Tadamasa

AU - Nakamura, Katsumasa

AU - Shioyama, Yoshiyuki

AU - Sasaki, Tomonari

AU - Saiji, Ohga

AU - Yamaguchi, Toshihiro

AU - Toba, Takashi

AU - Anai, Shigeo

AU - Terashima, Hiromi

AU - Honda, Hiroshi

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N2 - PURPOSE: To determine positioning accuracy of a machine vision system in radiotherapy. MATERIALS AND METHODS: The machine vision system was composed of 640 x 480 pixel CCD cameras and computerized control systems. For image acquisition, the phantom was set up for the reference position and a single CCD camera was positioned 1.5 m from the isocenter. The image data of the fiducial marker with 1.5 mm lead pellet on the lateral surface of the phantom was captured onto the CCD, and then the position of the marker was accurately calculated. The phantom was moved 0.25, 0.50, 0.75, 1.00, 2.00, and 3.00 mm from the reference position, using a micrometer head. The position of the fiducial marker was analyzed using a kilo-voltage fluoroscopic imaging system and a machine vision system. RESULTS: Using fluoroscopic images, the discrepancy between the actual movement of the phantom by micrometer heads and the measurement was found to be 0.12 +/- 0.05 mm (mean +/- standard deviation). In contrast, the detection of the movement by the machine vision system coincided with the discrepancy of 0.0067 +/- 0.0048 mm. CONCLUSION: This study suggests that the machine vision system can be used to measure small changes in patient position with a resolution of less than 0.1 mm.

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