Data

The Data panel contains options for data handling, including data loading and quantification.

Data Loading

Use the 'Data Loading' panel to set loading options.

Option Description
Disable MIP viewer Check the box to disable the MIP viewer upon loading. For large datasets, this can improve the loading speed.
Ask Disable MIP Check the box to enable VivoQuant to ask for your permission to initialize the MIP viewer upon loading. For large datasets, this can improve the loading speed.
Grow reference to input volume Choose 'yes' to allow the addition of zero-padding to a reference image to match the volume of an input image, or 'no' to keep the reference image size static (and potentially crop the input image, if it is larger than the reference). Choose 'ask' to allow a window to appear upon loading in an input 1 data set that is larger than the image in the reference position.
Max voxsize ratio for vol. Specify the maximum pixel ratio (largest pixel dimension / smallest pixel dimension) by which a data set is interpolated as a volume image file.
MinVoxSize Specify the minumum allowed voxel width. Data will be resampled upon loading if their voxel width is less than the specified minimum. The voxel width will be doubled until it exceeds the minimum.
Anchor input data Specify where to anchor the input data. Data can be anchored at the following options: center, head, or foot.

In the above image, LD represents the out-of-plane resolution and the X and Y represent the in-plane resolution. If the pixel ratio of the loaded image exceeds the given threshold, i.e. MaxVoxSizeRatio < LD/X, the data set will be loaded as a planar 2D by n file. Below is an example MR** image loaded as a planar 2D by n file.

If the pixel ratio of the loaded image is less than the given threshold, i.e. MaxVoxSizeRatio > LD/X, the data set will be loaded as an interpolated volume image with isotropic voxels. Below is an example MR** image loaded as an interpolated volume file.

**Other modalities besides MR can be loaded into VQ as planar or interpolated volume files based on the Max voxsize ratio for volume setting specified in the configuration window.

Note: As described on the Open DICOM Data help page,

Quantification Options

Use the 'Quantification Options' panel to set options used by the Quantification++ Operator and the 3D ROI Operator.

Option Description
Units of Activity Select the unit to be used for quantifying SPECT data. Options include MBq, kBq, mCi, and µCi. Note: Concentration units (e.g. nCi/cc) will not be converted to the unit of activity specified. The Tumor Segmentation and NM/CT Brain analysis plugin modules do support converting from concentration units to units of µCi.
CSV Separator Choose the CSV file delimiter of their choice, applied when saving Quantification data.

Data Manager

In the "Data Manager" panel, there is a checkbox to enable or disable a confirmation message when moving data.

Option Description
confirm moving Check to enable a confirmation message when rearranging data in the Data Manager
Show seconds in Browser Check to display the seconds in the study date column in the DICOM browser. VQ has to be restarted to configure this change.
Apply default shift Check to apply a default reorientation to data being loaded into VQ. The default shift can be defined in the Reorientation/Registration operator. For more on this, please see the Reorientation/Registration page