Paper Info
Title
Attempts to Bronchial Tumor Motion Tracking in Portal Images during Conformal Radiotherapy Treatment
Abstract
This is a feasibility study of tumor motion tracking in images generated by radiotherapy treatment beam. The objective is to control the beam during free breathing so as to reduce the irradiated zone and thus preserve healthy tissues. Two algorithms were tested on portal images sequences. Optical flow estimation (standard Horn and Schunck's algorithm), applied to images from a patient, gave poor results because of low contrast and absence of texture in these images. Target tracking algorithm (block-matching), tested on images of a phantom with a radio-opaque marker, gave satisfactory results : mean absolute error was less than 1 mm. Hence, tumor tracking in portal images is possible, provided that a marker can be implanted in tumor's vicinity. For images without markers, further work is necessary to assess if the small amount of motion information contained in such images can be reliably exploited.
Year
DOI
Venue
2001
10.1007/3-540-44692-3_31
CAIP
Keywords
Field
DocType
portal images sequence,motion information,absolute error,tumor motion tracking,conformal radiotherapy treatment,target tracking algorithm,feasibility study,bronchial tumor motion tracking,radio-opaque marker,radiotherapy treatment beam,portal image,tumor tracking,portal images,motion tracking,mean absolute error
Computer vision,Medical imaging,Computer science,Imaging phantom,Mean absolute error,Image processing,Conformal map,Radiation therapy,Artificial intelligence,Motion estimation,Match moving
Conference
ISBN
Citations 
PageRank 
3-540-42513-6
0
0.34
References 
Authors
4
5
Name
Order
Citations
PageRank
Maciej Orkisz131524.14
Anne Frery200.34
Olivier Chapet300.34
Françoise Mornex400.34
Isabelle E. Magnin554064.87