X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1996-10-29
1998-07-21
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Absorption
378 69, 378901, A61N 510
Patent
active
057844313
ABSTRACT:
X-ray images such as radiotherapy portal images and simulation images are matched by apparatus which digitizes the images and automatically processes the digitized signals to generate matched digitized signals which can be displayed for comparison. The digitized images are first coarse aligned using a transform generated from seed points selected interactively from the two images or through detection and identification of x-ray opaque fiducials placed on the patient. A fine alignment is then performed by first selecting intersecting regions of the two images and enhancing those regions. Secondly, an updated transform is generated using robust motion flow in these regions at successive ascending levels of resolution. The updated transform is then used to align the images which are displayed for comparison. The updated transform can also be used to control the radiotherapy equipment.
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Athanassiou Charalambos N.
Greenberger Joel
Kalend Andre M.
Kanade Takeo
Shimoga Karun B.
Bruce David Vernon
Porta David P.
University of Pittsburgh of the Commonwealth System of Higher Ed
Westerhoff Richard V.
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