CT View Editor Options

Use these options to customize the views for a CT study.

View OrientationSpecifies the CT view according to the view position. You can choose: Axial, Sagittal, Coronal, or Any. Use Any to match any CT view. For example, you want to match any CT image provided that the window level setting matches “bone.”

InteleViewer determines the view position by matching the DICOM value for the View Orientation attribute to that of each image in the series.

ThicknessSpecifies the slice thickness. You can choose: Thinnest, Thickest, or Any. Use Any to match any thickness. You can also use the text fields to enter a range of values (from 0 to 50 millimeters), specifying a lower limit, upper limit, or both. Invalid slice thickness values appear in red.

InteleViewer determines the slice thickness by matching the DICOM value for the Slice Thickness attribute to an image in the series. If the series has more than one image, InteleViewer uses an image in the middle of the series.

ContrastSpecifies whether or not a contrast agent is present. You can choose: With Contrast, Without Contrast, or Any. Use Any to match any or a particular CT view regardless of whether a contrast agent is present. InteleViewer determines the presence of a contrast agent by matching the DICOM value for Contrast Bolus Agent attribute to that of the images in the series.

For example, you open a CT study that contains the following DICOM value for Contrast Bolus Agent:

(0018,0010) ContrastBolusAgent LO #10 1 [OMNIPAQUE]

InteleViewer uses this value as the matching criteria. Since the Contrast Bolus Agent value is equal to “Omnipaque,” InteleViewer determines that this study has a contrast agent. If a sequence protocol contains a reading step that specifies a view with contrast, then only CT series with contrast will match that view. If you open a CT study that contains the DICOM value for Contrast Bolus Agent of “no,” “none,” or “off,” or is empty, then InteleViewer will not apply the sequence protocol to the CT study.

Window Level (input)InteleViewer determines the window level by matching the DICOM value for Window Width and Window Level to the values defined in the following table:

Window Level	Matching Criteria
Lung	If the DICOM value for Window Center is less than or equal to -300, then InteleViewer identifies the study as a lung study. If the DICOM value for Window Center is less than or equal to 0 and the value for Window Width is greater than or equal to 1000, then InteleViewer identifies the study as a lung study.
Soft tissue	InteleViewer identifies the series as soft tissue in the following scenarios: If the DICOM value for Window Center is between 0 and 100 (0 < Window Center < 100), regardless of the Window Width value. If the DICOM value for Window Center is between -300 and 0 (-300 <= Window Center <= 0), or between 100 and 200 (100 <= Window Center <= 200), and the Window Width value is less than or equal to 1000.
Bone	If the DICOM value for Window Center is greater than or equal to 200, then InteleViewer identifies the study as a bone study. If the DICOM value for Window Center is greater than or equal to 100, and the value for Window Width is greater than or equal to 1000, then InteleViewer identifies the study as a bone study.
Any	InteleViewer matches any or a particular CT view regardless of whether the DICOM values for Window Center and Windows Width are specified in the image.

For example, you open a CT study that contains the following DICOM values for Window Center and Window Width:

(0028,1050) WindowCenter DS #4 1 [80.0]

(0028,1051) WindowWidth DS #6 1 [186.0]

InteleViewer uses these values as the matching criteria. Since the Window Center attribute value is equal to “80,” InteleViewer determines that this study has a window level value of “Soft Tissue.” If a sequence protocol contains a reading step with a view where the window level value is equal to “Soft Tissue,” then only CT series with a window level value of “Soft Tissue” will match that view.

Window Level (output)Automatically applies the window level setting to the series in the study. You can choose the window level presets: Lung, Bone, and Soft Tissue, or choose the window level setting from the DICOM data contained in the image (the default). You can also enter the required width and level settings in the corresponding fields.

By default, InteleViewer applies the following window level settings to CT studies:

Preset Name	Width	Level
Lung	1500	-600
Bone	2500	480
Soft Tissue	350	40

If the CT modality user preferences include Lung, Bone, or Soft Tissue window level presets, InteleViewer will use these presets as the matching criteria instead of the same presets defined by the view. Furthermore, window level presets in a presentation state will override presets defined by a view.

Reformat Using Advanced VisualizationAutomatically reformats the view and displays it by using the options that you define. You can define the following default options:

• Thickness for the reformat (in millimeters)
• Orientation/view of the reformat
• Slabbing options (Average, MIP, and MinIP)

Use Don’t Modify to preserve the original view orientation or thickness value.

The Advanced Visualization functionality applies only to CT or MR series that have at least 10 parallel, equidistant, and equally sized images—each with a resolution greater than 2 x 2.