DSA Loader Module
The DSA Loader Module is a specialized DICOM loader designed to handle Digital Subtraction Angiography (DSA) images. This module enables efficient parsing, caching, and rendering of DSA frames while integrating seamlessly with the cornerstoneDICOMImageLoader ecosystem.
Key Responsibilities
- Custom DSA Image Loading: Implements logic to load and process DSA image frames.
- Pixel Shift Application: Supports pixel shift operations for improved DSA visualization.
- Series Management: Works with the Image Manager to manage and retrieve DSA metadata.
- Efficient Caching: Avoids redundant dataset parsing by utilizing an internal cache.
- Cornerstone Integration: Generates Cornerstone-compatible images for seamless rendering.
Internal Workflow
- Image Parsing & Retrieval:
- Extracts image metadata from the Image Manager.
- Image ID Assignment:
- Generates unique image IDs for each frame.
- Pixel Data Processing:
- Applies pixel shifts and processes pixel values.
- Custom Image Creation:
- Converts processed frames into Cornerstone-compatible images.
Main Functions
loadDsaImage
Syntax:
loadDsaImage(imageId: string): ImageLoadObject
Parameters:
| Parameter | Type | Description |
|---|---|---|
imageId | string | The ID of the DSA image to be loaded. |
Returns:
ImageLoadObject – An object containing a Promise that resolves to the loaded image.
populateDsaImageIds
Syntax:
populateDsaImageIds(uniqueUID: string): void
Parameters:
| Parameter | Type | Description |
|---|---|---|
uniqueUID | string | A unique identifier for the DSA image series. |
Returns:
void – Populates DSA image IDs for a given series.
setPixelShift
Syntax:
setPixelShift(pixelShift: number[] | undefined): void
Parameters:
| Parameter | Type | Description |
|---|---|---|
pixelShift | number[] | undefined | The pixel shift array applied to DSA images. |
Returns:
void – Sets the pixel shift values for DSA processing.
getDsaImageId
Syntax:
getDsaImageId(customLoaderName: string): string
Parameters:
| Parameter | Type | Description |
|---|---|---|
customLoaderName | string | The name of the custom image loader. |
Returns:
string – A unique image ID generated for the DSA loader.
createCustomImage
Syntax:
createCustomImage(imageId: string, srcImage: Image, pixelData: number[]): ImageLoadObject
Parameters:
| Parameter | Type | Description |
|---|---|---|
imageId | string | The unique identifier for the DSA image. |
srcImage | Image | The original source image object. |
pixelData | number[] | The processed pixel data for the DSA image. |
Returns:
ImageLoadObject – A Cornerstone-compatible image object.
Conclusion
The DSA Loader Module provides an efficient, optimized, and structured approach for handling Digital Subtraction Angiography images. By leveraging caching, pixel shift correction, and seamless Cornerstone integration, it ensures smooth performance and high-quality visualization of DSA datasets.
