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3.14. Evaluation of a general static study

The program is used for simple standardized evaluation of those static (multistatic) studies for which the relevant comprehensive programs are not available .

The evaluation of a general static study usually consists of four stages:

• Study specification , image selection and projection assignment.
• Visual evaluation of the distribution of the radio indicator in individual projections (eg in order to detect possible deposits of increased or decreased deposition of the radio indicator).
• Possibly. quantitative determination of the relative deposition of the radioindicator at different sites.
• Creation and printing of the final report containing images, or quantitative values ??and verbal evaluation, including conclusion.

Study evaluation

After calling up the required scintigraphic study *) in the basic menu PROCESSING, we start the complex program GENSTAT - general static study . At the request of the program, we will insert the name of the scintigraphic study - it will then be listed in the header of the resulting protocol.
*) As with other evaluations, several scintigraphic studies can be called up, concatenated and simultaneously evaluated using the "Next" command.

Sequence of projections and visual evaluation

The display shows the stacked images of each projection (only as many projections as the images have been stacked). If we agree with the order of the projections and want to keep all the images, we will answer the question of the program "Projection order in order?" positive. Otherwise (negative answer) we specify gradually the required order of projections on the instructions of the program. This way you can not just toss the sequence of projections, but also a picture of y to select (and others reject) for further display, processing and documentation. Each image can be given a name (eg projection name, time, etc.) - this name will then appear in the log for the respective image. If we have images with the corresponding name assignment, a visual evaluation begins, while we can use both implicit standard formulations of normal or pathological evaluation selected from the disk and non - standard free text.

Quantification of relative accumulation of a radio indicator

If I want to quantify the relative deposition of the radio indicator in individual places of the images, we first select the image (projection) on the display, on which we want to quantify the desired place. Follow the instructions on the screen to mark the first specific reference area to which either d ou referenced values tracer deposition in other places. Then we gradually mark the required areas of interest and insert their names at the instruction of the program . For each such region, the relative deposition of the radio indicator at the corresponding location in percent relative to the reference region is calculated. If we no longer want to quantify, we will see a summary table of results for all quantified sites.

Final protocol

The display shows all the preset images with names, or together with the results of the determination of the relative accumulation of the radioindicator in individual places. In the box below we can edit the text of the verbal description of the scintigraphic images and the conclusion. Finally, we can print a report containing (in addition to basic data such as name pa c ient) relevant images, quantitative data on the distribution of radiotracer text verbal evaluation, conclusion and signature - obr.3.14.1.

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