How to read nested DICOM metadata

Support
1

I’m new to slicer and python. Currently I’m trying to write an extension that involves reading nested dicom files. I can read normal files using this code…

instUids=dicomData.split()
filename=slicer.dicomDatabase.fileForInstance(instUids[0])
aquisitionModality[volumeNumber] = slicer.dicomDatabase.fileValue(filename,'0008,0060')

but I have been unable to read nested tags such as (0008,1032) (fffe,e000) (0008,0104) - where the tags are labelled in this order in the DICOM File Metadata display. I’m sure I must be missing something very simple…

2

To access DICOM tags within sequence (SQ) tags, you can get the DICOM filename as described here, then use pydicom (bundled with Slicer) to read the file and retrieve any values.

1 Like
3

this has no direct answer but here it is how to do it using pydicom

import dicom
instUids=dicomData.split()
filename=slicer.dicomDatabase.fileForInstance(instUids[0])
plan = dicom.read_file(filename)
aquisitionModality[volumeNumber] = float(plan[0x08,0x1032][0][0x08,0x0104].value)

You have to nest the tags, the (fffe,e000) accounts for the list so unravel using [0]