Looping pages
Image Quizzer has the ability to allow the users to Repeat a page if for example you want the user to contour all regions of interest they find on one image and answer the same questions for each.
To do this, assign the Loop attribute to "Y" in the Page element.
The Repeat button is visible on a Page that has Loop="Y" and becomes enabled when the last question set for the Page is displayed.
When the Repeat button is pressed by the user, the Image Quizzer will ensure that all quiz questions and required annotations are complete before proceding. The responses for the current page are saved to the results XML file and then a copy of this Page element is made and inserted into the results file. The copied Page has the ID attribute modified adding a suffix of -RepN where N is the number of the repetition (e.g. PageID-Rep1).
Prep
For the following example, we will use the CT-MR Brain sample dataset that is available when you open Slicer.
Download and save the dataset as described in the sample data section to a subfolder under ImageVolumes folder as shown.
.
└─ ImageQuizzerData/
└─ ImageVolumes/
└─ CT-MR Brain/
├─ CTBrain.nrrd
├─ MRBrainT1.nrrd
└─ MRBrainT2.nrrd
Script example
For this quiz example, we will present each image for this patient on a different page with Loop="Y" only on the pages displaying the MR images. (This could be an observer study to compare observers' ability to detect and classify lesions on different modalities).
<Session>
<Page ID="PatientC" Descriptor="Grp3- Brain-CT" Layout="OneUpRedSlice">
<Image Type="Volume" ID="CT">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\CTBrain.nrrd</Path>
</Image>
<QuestionSet ID="Lesions" Descriptor="Lesions detected on CT">
<Question Type="IntegerValue" Min="0" Descriptor="Total">
<Option>Enter the number of lesions detected:</Option>
</Question>
</QuestionSet>
</Page>
<Page ID="PatientC" Descriptor="Grp3- Brain-MR T1" Layout="OneUpRedSlice" Loop="Y" EnableSegmentEditor="Y">
<Image Type="Volume" ID="MR T1">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\MRBrainT1.nrrd</Path>
</Image>
<QuestionSet ID="Lesions" Descriptor="Lesions detected on T1W MR">
<Question Type="InfoBox">
<Option>Contour and classify one lesion.</Option>
<Option>Use the repeat button if multiple lesions exist.</Option>
</Question>
<Question Type="Radio" Descriptor="Classification">
<Option>Primary</Option>
<Option>Metasasis</Option>
</Question>
</QuestionSet>
</Page>
<Page ID="PatientC" Descriptor="Grp3- Brain-MR T2" Layout="OneUpRedSlice" Loop="Y" EnableSegmentEditor="Y">
<Image Type="Volume" ID="MR T2">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\MRBrainT2.nrrd</Path>
</Image>
<QuestionSet ID="Lesions" Descriptor="Lesions detected on T2W MR">
<Question Type="InfoBox">
<Option>Contour and classify one lesion.</Option>
<Option>Use the repeat button if multiple lesions exist.</Option>
</Question>
<Question Type="Radio" Descriptor="Classification">
<Option>Primary</Option>
<Option>Metasasis</Option>
</Question>
</QuestionSet>
</Page>
</Session>
Results
When running this quiz, contours were created on Pages 2 and 3 and the Repeat button for looping was be used once on Page 2 and twice on Page 3. Following is the resulting tree structure and the resulting quiz file. Each folder in the directory tree holds a label map file for the contours created at each repetition.
.
└─ ImageQuizzerData/
└─ Users/
└─ Observer1/
├─ PgGroup2_PatientC_Grp3- Brain-MR T1/
├─ PgGroup2_PatientC-Rep1_Grp3- Brain-MR T1/
├─ PgGroup3_PatientC_Grp3- Brain-MR T2/
├─ PgGroup3_PatientC-Rep1_Grp3- Brain-MR T2/
├─ PgGroup3_PatientC-Rep2_Grp3- Brain-MR T2/
└─ example_looping.xml
Following is the results XML quiz file for the looping example described above. Note the added attributes:
example_looping.xml (The results quiz file holding the observers responses)
<Session UserName="Observer1">
<Page Descriptor="Grp3- Brain-CT" ID="PatientC" Layout="OneUpRedSlice" PageComplete="Y" PageGroup="1" Rep="0">
<Image ID="CT" Type="Volume">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\CTBrain.nrrd</Path>
<State Destination="Red" Level="-1855.5625" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:41:06.370915" SliceOffset="-41.66604979395833" ViewingMode="Default" Window="5253.323863636366"/>
</Image>
<QuestionSet Descriptor="Lesions detected on CT" ID="Lesions">
<Question Descriptor="Total" Min="0" Type="IntegerValue">
<Option>
Enter the number of lesions detected:
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:41:06.368419">1</Response>
</Option>
</Question>
</QuestionSet>
</Page>
<Page Descriptor="Grp3- Brain-MR T1" EnableSegmentEditor="Y" ID="PatientC" Layout="OneUpRedSlice" Loop="Y" PageComplete="Y" PageGroup="2" Rep="0">
<Image ID="MR T1" Type="Volume">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\MRBrainT1.nrrd</Path>
<LabelMapPath LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:13.075922">example_looping\PgGroup2_PatientC_Grp3- Brain-MR T1\PatientC_MR T1-bainesquizlabel.nrrd</LabelMapPath>
<State Destination="Red" Level="269.5113636363636" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:43:13.139537" SliceOffset="-13.069520903423077" ViewingMode="Default" Window="349.8636363636364"/>
</Image>
<QuestionSet Descriptor="Lesions detected on T1W MR" ID="Lesions">
<Question Type="InfoBox">
<Option>
Contour and classify one lesion.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:13.087400"/>
</Option>
<Option>
Use the repeat button if multiple lesions exist.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:13.087400"/>
</Option>
</Question>
<Question Descriptor="Classification" Type="Radio">
<Option>
Primary
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:13.087400">Y</Response>
</Option>
<Option>
Metasasis
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:13.087400">N</Response>
</Option>
</Question>
</QuestionSet>
</Page>
<Page Descriptor="Grp3- Brain-MR T1" EnableSegmentEditor="Y" ID="PatientC-Rep1" Layout="OneUpRedSlice" Loop="Y" PageComplete="Y" PageGroup="2" Rep="1">
<Image ID="MR T1" Type="Volume">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\MRBrainT1.nrrd</Path>
<State Destination="Red" Level="269.5113636363636" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:43:13.139537" SliceOffset="-13.069520903423077" ViewingMode="Default" Window="349.8636363636364"/>
<LabelMapPath LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:44.170952">example_looping\PgGroup2_PatientC-Rep1_Grp3- Brain-MR T1\PatientC-Rep1_MR T1-bainesquizlabel.nrrd</LabelMapPath>
<State Destination="Red" Level="269.5113636363636" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:43:44.217363" SliceOffset="-14.007020903422983" ViewingMode="Default" Window="349.8636363636364"/>
</Image>
<QuestionSet Descriptor="Lesions detected on T1W MR" ID="Lesions">
<Question Type="InfoBox">
<Option>
Contour and classify one lesion.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:44.183927"/>
</Option>
<Option>
Use the repeat button if multiple lesions exist.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:44.183927"/>
</Option>
</Question>
<Question Descriptor="Classification" Type="Radio">
<Option>
Primary
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:44.183927">N</Response>
</Option>
<Option>
Metasasis
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:43:44.183927">Y</Response>
</Option>
</Question>
</QuestionSet>
</Page>
<Page Descriptor="Grp3- Brain-MR T2" EnableSegmentEditor="Y" ID="PatientC" Layout="OneUpRedSlice" Loop="Y" PageComplete="Y" PageGroup="3" Rep="0">
<Image ID="MR T2" Type="Volume">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\MRBrainT2.nrrd</Path>
<LabelMapPath LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:17.563632">example_looping\PgGroup3_PatientC_Grp3- Brain-MR T2\PatientC_MR T2-bainesquizlabel.nrrd</LabelMapPath>
<State Destination="Red" Level="440.5" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:44:17.609544" SliceOffset="-11.95652695110362" ViewingMode="Default" Window="881.0"/>
</Image>
<QuestionSet Descriptor="Lesions detected on T2W MR" ID="Lesions">
<Question Type="InfoBox">
<Option>
Contour and classify one lesion.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:17.577106"/>
</Option>
<Option>
Use the repeat button if multiple lesions exist.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:17.577106"/>
</Option>
</Question>
<Question Descriptor="Classification" Type="Radio">
<Option>
Primary
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:17.577106">Y</Response>
</Option>
<Option>
Metasasis
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:17.577106">N</Response>
</Option>
</Question>
</QuestionSet>
</Page>
<Login LoginTime="20230321_16:40:13.224042" LogoutTime="20230321_16:45:05.681340" QuizComplete="Y"/>
<Page Descriptor="Grp3- Brain-MR T2" EnableSegmentEditor="Y" ID="PatientC-Rep1" Layout="OneUpRedSlice" Loop="Y" PageComplete="Y" PageGroup="3" Rep="1">
<Image ID="MR T2" Type="Volume">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\MRBrainT2.nrrd</Path>
<State Destination="Red" Level="440.5" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:44:17.609544" SliceOffset="-11.95652695110362" ViewingMode="Default" Window="881.0"/>
<LabelMapPath LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:41.532751">example_looping\PgGroup3_PatientC-Rep1_Grp3- Brain-MR T2\PatientC-Rep1_MR T2-bainesquizlabel.nrrd</LabelMapPath>
<State Destination="Red" Level="440.5" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:44:41.578163" SliceOffset="-7.966527418404027" ViewingMode="Default" Window="881.0"/>
</Image>
<QuestionSet Descriptor="Lesions detected on T2W MR" ID="Lesions">
<Question Type="InfoBox">
<Option>
Contour and classify one lesion.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:41.548221"/>
</Option>
<Option>
Use the repeat button if multiple lesions exist.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:41.548221"/>
</Option>
</Question>
<Question Descriptor="Classification" Type="Radio">
<Option>
Primary
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:41.548221">N</Response>
</Option>
<Option>
Metasasis
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:44:41.548221">Y</Response>
</Option>
</Question>
</QuestionSet>
</Page>
<Page Descriptor="Grp3- Brain-MR T2" EnableSegmentEditor="Y" ID="PatientC-Rep2" Layout="OneUpRedSlice" Loop="Y" PageComplete="Y" PageGroup="3" Rep="2">
<Image ID="MR T2" Type="Volume">
<Layer>Background</Layer>
<DefaultDestination>Red</DefaultDestination>
<DefaultOrientation>Axial</DefaultOrientation>
<Path>ImageVolumes\CT-MR Brain\MRBrainT2.nrrd</Path>
<State Destination="Red" Level="440.5" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:44:17.609544" SliceOffset="-11.95652695110362" ViewingMode="Default" Window="881.0"/>
<State Destination="Red" Level="440.5" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:44:41.578163" SliceOffset="-7.966527418404027" ViewingMode="Default" Window="881.0"/>
<LabelMapPath LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:45:05.663666">example_looping\PgGroup3_PatientC-Rep2_Grp3- Brain-MR T2\PatientC-Rep2_MR T2-bainesquizlabel.nrrd</LabelMapPath>
<State Destination="Red" Level="440.5" LoginTime="20230321_16:40:13.224042" Orientation="Axial" ResponseTime="20230321_16:45:05.714776" SliceOffset="-7.966527418404029" ViewingMode="Default" Window="881.0"/>
</Image>
<QuestionSet Descriptor="Lesions detected on T2W MR" ID="Lesions">
<Question Type="InfoBox">
<Option>
Contour and classify one lesion.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:45:05.681340"/>
</Option>
<Option>
Use the repeat button if multiple lesions exist.
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:45:05.681340"/>
</Option>
</Question>
<Question Descriptor="Classification" Type="Radio">
<Option>
Primary
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:45:05.681340">N</Response>
</Option>
<Option>
Metasasis
<Response LoginTime="20230321_16:40:13.224042" ResponseTime="20230321_16:45:05.681340">Y</Response>
</Option>
</Question>
</QuestionSet>
</Page>
</Session>