Accuracy of image guidance using free-breathing cone-beam computed tomography for stereotactic lung radiotherapy.

ABSTRACT: Movement of the target object during cone-beam computed tomography (CBCT) leads to motion blurring artifacts. The accuracy of manual image matching in image-guided radiotherapy depends on the image quality. We aimed to assess the accuracy of target position localization using free-breathing CBCT during stereotactic lung radiotherapy. The Vero4DRT linear accelerator device was used for the examinations. Reference point discrepancies between the MV X-ray beam and the CBCT system were calculated using a phantom device with a centrally mounted steel ball. The precision of manual image matching between the CBCT and the averaged intensity (AI) images restructured from four-dimensional CT (4DCT) was estimated with a respiratory motion phantom, as determined in evaluations by five independent oper

SUBMITTER: Kamomae T 

PROVIDER: S-EPMC4425686 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature