X-ray or gamma ray systems or devices – Accessory – Object holder or support
Patent
1990-03-21
1991-10-01
Westin, Edward P.
X-ray or gamma ray systems or devices
Accessory
Object holder or support
378209, 378 20, H05G 100, A61B 604
Patent
active
050540491
ABSTRACT:
The x-ray absorption factor of each end section of a top table is lower than that of a middle section thereof. If the end section of the top table protrudes from an effective field of scan so that fan beams are transmitted through the protruded portion, the beams can hardly be absorbed by the protruded portion. Accordingly, projection data obtained are hardly subject to any significant differences which depend on the transmission of the fan beams. Even though an image is reconstructed in accordance with the obtained projection data, therefore, it can be restrained from suffering shading. Thus, a high-quality image can be obtained.
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Chu Kim-Kwok
Kabushiki Kaisha Toshiba
Westin Edward P.
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