[Trend scintigraphy]

Focal changes in activity concentration for given time function. The increase per time interval is calculated for each pixel and arranged into a result matrix. Areas with increasing activity are displayed in a "positive trend scintigramm", those with decreasing activity in a "negative trend scintigram", using a gray scale of color format. Statistical fluctuations are suppressed using this method; the data smoothing over the chosen time period and the fact that several individual pictures are included in the calculations provide displays with increased informational content as compared to serial imaging methods. The clinical interpretation of localized changes in activity concentration during a specific time interval is facilitated. The method is simple, can be adapted to different camera and computer systems, and requires no additional examination procedures on the patient.