| 摘要 |
<p>Methods and systems for calibrating a digital gamma camera (10) using a hole phantom are described. In one embodiment, the system includes a computer (106) programmed to perform offset adjustments (54) and gain adjustments (56), and then using a source (100) to flood the hole phantom (102), image data of the phantom is collected by the camera (10) to be calibrated. The image data collected from such flood is used to generate a light distribution function (58) for the camera (10). In addition, residual distortions (62) are measured, and a spatial corrections map and an energy deficit map (64) are created. A quality control image (66) also can be generated to verify that the camera (10) is calibrated.</p> |
