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Fluoroscopic tracking of lung tumor mass without implanted fiducial markers Introduction/Motivation Respiratory gated radiotherapy holds promise to reduce the incidence and severity of normal tissue complications and to increase local control through dose escalation, for mobile tumors in thorax and
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2007 |
| Abstract | Method and Materials: During the patient setup session, a pair of 15 second orthogonal fluoroscopic images are taken and processed off-line to generate reference templates. Each breathing cycle is divided into 12 phase bins. Setup image frames falling in a specific bin are motion-enhanced and averaged, and an ROI that contains the tumor is selected to be the reference template for that phase bin. Each reference template corresponds to a tumor position in the image. During the treatment, as soon as a fluoroscopic image is acquired, the cross-correlation score between each reference template and this image is maximized by allowing small shifts of the template in both X and Y directions. Then the tumor position is derived by averaging the tumor centroid coordinates in those templates of high scores (above 85% of the maximum score). For comparison, tumor position in each image frame was also marked by a clinician. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ece.neu.edu/fac-ece/jdy/papers/AAPM06-tracking-cui.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
