# 2D Ultrasound Dicom Measurement Units

**URL:** <https://discourse.slicer.org/t/2d-ultrasound-dicom-measurement-units/5030>\
**Category:** Development\
**Created:** [December 10, 2018, 3:48pm UTC](https://discourse.slicer.org/t/2d-ultrasound-dicom-measurement-units/5030 "2018-12-10T15:48:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MGH\_CURT](https://avatars.discourse-cdn.com/v4/letter/m/f0a364/32.png) [@MGH\_CURT](https://discourse.slicer.org/u/MGH_CURT)\
**Post date:** [December 10, 2018, 3:48pm UTC](https://discourse.slicer.org/t/2d-ultrasound-dicom-measurement-units/5030/1 "2018-12-10T15:48:58Z")

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Operating system: Windows 10

Slicer version: 4.8.1

Expected behavior: When reading **ultrasound** dicom images to perform measurements, Slicer should read in the dicom metadata’s SequenceOfUltrasoundRegions.Item\_1.PhysicalDeltaX to reflect pixel to actual cm/mm values.

Actual behavior: When reading **ultrasound** dicom images to perform measurements, Slicer is reading pixel distance instead, outputting significantly different number when measuring.

Manual adjustment for each us dicom image is possible by tweaking the settings of the coefficient for the length measurement. However, it is cumbersome and we believe it is an easy fix for the Slicer development team to adjust measurement units for ultrasound dicom files accordingly. In the Dropbox link below are 5 anonymized ultrasound dicom files for testing.

> **[slicer\_forum\_anon](https://www.dropbox.com/sh/26ity4rabrpdeyd/AADNhZ5eixHuMGHrevMt933La?dl=0)**
>
> Shared with Dropbox

Thanks! 😄