Abstract
In a previous paper, isocount scintiscanning was presented by the authors as a method for improving the statistical reliability. of the gathered data. It has been noted that the reduction of scanning time is very important for the sake, of the patient's comfort and also that the direct visualization of photographic film constitutes a considerable loss of information.
A television display system that composes a scintigram from some fewer sampled data through two-dimensional interpolation is presented. It is demonstrated that the resulting picture has an improved quality and no loss of detail. Moreover, the scanning time may be reduced to less than that of the conventional constant speed method.
The multilevel analysis is also presented as a technique that enables the distinction of a single bit by expanding those data between a reference level L and L+k(k=8 to 10) to the entire density curve of the TV screen.The reference L is sequentially changed, and this analysis has been demonstrated to be very useful for liver scanning. For the brain, with k=0 (binary picture), this expedient produces an animation-like sequence of silhouettes which facilitates the feature extraction, making the diagnosis more objective.
