Volume measurement in CT

ImFusion Suite General & How-to
1

Hello, is it possible to measure the volume of a bone defect in a CT dataset with the ImFusion Suite software? And if so, how do I do that?

2

Do you have the ImFusion Labels software?
Measuring volumes of structures is something that can be easily done in this software: just annotate it (using our 3D Brush for instance) and the Statistics will be shown in the Pointer sub-menu.

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3

Hi,
alternatively in the ImFusion Suite you can reach a similar functionality using the Segmentation > Labeling algorithm: It enables you to perform a similar brush-based labeling of the bone and offers the Statistics button which will print out the label statistics in the log window on the bottom, for instance:

Calculating statistics on the CPU: 
2 labels comprising 284546 of 16777216 voxels (1.69603%) 
1: 191194 voxels (1.13961%), 5493.74 mm3, mean -95.8895, std 94.3366, min -660, max 525, snr -1.01646 
2: 93352 voxels (0.556421%), 2682.36 mm3, mean 122.023, std 688.314, min -1024, max 2859, snr 0.177278

If you already have an existing label map, you could also run the Segmentation > Structures View algorithm and then right click on the label and click “Show Statistics” opening a new window with that information.

Cheers,
Christian

4

Thank you for the quick responses. Unfortunately I don’t have the ImFusion Labels software. In Imfusion Suite, the only segmentation algorithms available to me are Spline Slicing, Superpixels Segmentation and Vesselness. What is the reason for this?

5

Hi,

this sounds as if you are lacking the Segmentation Plugin/Module.

Can you please check what the log window prints on application start? There should be a line where it lists the loaded plugins like [Framework] Available Plugins: ImFusionDicom, ImFusionML, ImFusionReg, ImFusionSeg, TorchPlugin.. The Labeling/Measurement facilities are part of the ImFusionSeg plugin.

Cheers,
Christian

6

Sorry for my late reply.
The log window looks like that:

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ImFuisonSeg should be available, right?

7

No, ImFusionSeg does not apppear in the list of available plugins. Since I see Vision/RGB-D in there instead I assume that your vision license does not include the segmentation plugin and it is therefore disabled.

Cheers,
Christian