Readind data from Dicom

[zeinsalah]

Sorry if this a silly question!

I am wondering if the "loadFile()" function loads the whole data dicom file or just the header. In other words,

does a code like this

OFCondition cond = fileformat.loadFile("filename");
DcmDataset* dataset = fileformat.getDataset();
if (dataset->findAndGetUint16Array(DCM_PixelData, pData).bad())
{

}

return the pixel data of the patient as a block of memory pointed to by pData?
Or I am missing something?

Thanks,
Zein

[Jan Schlamelcher]

Sorry if this a silly question!

It most certainly isn't!

I am wondering if the "loadFile()" function loads the whole data dicom file or just the header. In other words,

No, it typically doesn't, thats what the loadAllDataIntoMemory() function is for .

does a code like this

OFCondition cond = fileformat.loadFile("filename");
DcmDataset* dataset = fileformat.getDataset();
if (dataset->findAndGetUint16Array(DCM_PixelData, pData).bad())
{

}

return the pixel data of the patient as a block of memory pointed to by pData?
Or I am missing something?

I'm not entirely sure, but I think the findAndGetUint16Array() call will load missing data into memory if it isn't already there, so it should be fine.

[J. Riesmeier]

I'm not entirely sure, but I think the findAndGetUint16Array() call will load missing data into memory if it isn't already there, so it should be fine.

Right, it will load the Pixel Data element value field (if not yet done). Other long value fields will not be loaded.

By the way, there's a "maxReadLength" parameter for the DcmFileFormat::readFile() method, which allows for specifying the exact length (in bytes) on what's a "long" (or "short") element value.