sr does not need dicom files in order,fix invisible char in radiomics…

[vkt1414]

This PR addresses #6.

I ran the radiomics notebook with and with out sorting and checked the quant values b/w with the query below after extracting measurement groups and quant values. As expected there was no difference b/w the two. Unsure if we need to check anything else.

CurrentRequestedProcedureEvidenceSequence.ReferencedSeriesSequence.ReferencedSOPSequence.ReferencedSOPInstanceUID were not in the same order and that's expected I guess.

with w_sorting as
(select
sourceSegmentedSeriesUID,
trackingIdentifier,
Quantity.CodeMeaning,
Value v1
from
`idc-external-025.test_sort.quant_w_sorting` 
),
wo_sorting as 
(
select
sourceSegmentedSeriesUID,
trackingIdentifier,
Quantity.CodeMeaning,
Value v2
from
`idc-external-025.test_sort.quant_wo_sorting`
)

Select * from w_sorting
join wo_sorting using (sourceSegmentedSeriesUID,trackingIdentifier,CodeMeaning)
where  v1!=v2

I also found some wierd character pop up in SRs, so updated the csv file to remove them.

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