Difference between revisions of "2011 Winter Project Week:DicomToNrrdRefactoring"
From NAMIC Wiki
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<h3>Objective</h3> | <h3>Objective</h3> | ||
Gather requirements in support of refactoring the DWI DicomToNrrdConverter. | Gather requirements in support of refactoring the DWI DicomToNrrdConverter. | ||
| + | |||
| + | * Redesign DicomToNrrdConverter so that it is more maintainable. | ||
| + | * Design a general base class to support most of the medical images in dicom format. | ||
| + | * Supports for vendor/version/datatype combinations are implemented as derived classes and are independent from each other. | ||
| + | * (Possibly) define APIs and derived classes for functional MRI. | ||
</div> | </div> | ||
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*[[NAMIC_Wiki:DTI:Nrrd_format | DTI:Nrrd_Format]] | *[[NAMIC_Wiki:DTI:Nrrd_format | DTI:Nrrd_Format]] | ||
*[[NAMIC_Wiki:DTI:DICOM_for_DWI_and_DTI|DICOM_for_DWI_and_DTI]] | *[[NAMIC_Wiki:DTI:DICOM_for_DWI_and_DTI|DICOM_for_DWI_and_DTI]] | ||
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| + | '''Refactoring of Dicom to NRRD converter: | ||
| + | |||
| + | *Target for Slicer4. First working version (passing current tests) in April. | ||
| + | * Define API's for GDCM 2.x. Integrate with GDCM 2.x at summer programming week. | ||
| + | * Separate functionalities for extracting essential spacial information from those for extracting non-essential information. | ||
| + | *Essential information (all in public tags): space location, resolution, image orientation (IJK->xyz), and how the ordering of dicom files corresponds to the organization of the slices. This information is essential for putting measurements in the correct physical locations. | ||
| + | *Non-essential information (some are in private tags, vendor dependent): diffusion related information -- b-values, gradient weighting direction, B-matrix. | ||
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</div> | </div> | ||
Revision as of 17:25, 11 January 2011
Home < 2011 Winter Project Week:DicomToNrrdRefactoring
Key Investigators
- UIowa: Hans Johnson, Mark Scully, Joy Matsui
- GE: Xiaodong Tao
Objective
Gather requirements in support of refactoring the DWI DicomToNrrdConverter.
- Redesign DicomToNrrdConverter so that it is more maintainable.
- Design a general base class to support most of the medical images in dicom format.
- Supports for vendor/version/datatype combinations are implemented as derived classes and are independent from each other.
- (Possibly) define APIs and derived classes for functional MRI.
Approach, Plan
Meet with anyone interested and establish a list of known requirements for DicomToNrrdConverter. Collectively brainstorm approaches to the refactoring, such as the use of GDCM 1.2 vs. GDCM 2.x vs. DCMTK. References:
Refactoring of Dicom to NRRD converter:
- Target for Slicer4. First working version (passing current tests) in April.
- Define API's for GDCM 2.x. Integrate with GDCM 2.x at summer programming week.
- Separate functionalities for extracting essential spacial information from those for extracting non-essential information.
- Essential information (all in public tags): space location, resolution, image orientation (IJK->xyz), and how the ordering of dicom files corresponds to the organization of the slices. This information is essential for putting measurements in the correct physical locations.
- Non-essential information (some are in private tags, vendor dependent): diffusion related information -- b-values, gradient weighting direction, B-matrix.
Progress
Current DWI variations list:
- slice ordering (S->I vs I->S),
- transfer syntax endianness (big, little, and unknown),
- slice arrangement (mosaic vs split, slice interleaving vs volume interleaving),
- #B-Values (single vs multiple),
- gradient vector reference frame (Scanner vs patient),
- slice orientation (orthogonal vs oblique),
- multiple B0s (all at beginning, all at end, interspersed)
- vendor (different ways of storing diffusion information),
- software versions (changes in how diffusion information is stored and interpreted).
