画像誘導放射線治療におけるcone-beam computed tomography の撮像方法が画像照合精度に及ぼす影響

DOI Web Site Web Site PubMed 参考文献25件

書誌事項

タイトル別名
  • Influence of Acquisition Mode of Cone-beam Computed Tomography on Accuracy of Image Registration for Image-guided Radiotherapy
  • ガゾウ ユウドウ ホウシャセン チリョウ ニ オケル cone-beam computed tomography ノ サツゾウ ホウホウ ガ ガゾウ ショウゴウ セイド ニ オヨボス エイキョウ

この論文をさがす

抄録

<p>Half scan can acquire images at the 200° rotation in image-guided radiation treatment using cone-beam CT and is useful to evaluate the influence of the half-scan-imaging start angle and imaging direction on image registration accuracy. The half-scan-imaging start angle is changed from 180° to 340° in the clockwise direction and from 180° to 20° in the counter clockwise direction to calculate the registration error. As a result, registration errors between −0.37 mm and 0.27 mm in the left and right directions occur because of the difference in the imaging start angle and approximately 0.3° in the gantry rotation direction because of the difference in the imaging direction. Because half scan does not have data for 360° rotation, depending on the subject structure, inconsistency of opposing data can lower reconstruction accuracy and cause a verification error. In addition, in image acquisition during rotation, the slower the shutter speed is, the more the actual gantry angle and angle information of the image are apart, which is considered the cause of rotation errors. Although these errors are very minute, it is thought that there is no influence on the treatment effect, but these errors are considered an evaluation item indispensable for ensuring the accuracy of high-precision radiation treatment. In addition, these errors need to be considered for ensuring the quality of high-precision radiation treatment.</p>

収録刊行物

参考文献 (25)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ