Hello c.p.d.,

curious as I am, I came across the "Trial SR" SOP Classes in the 2008
Standard (PS3.6-2008), that I could not find in the 2007 Documents, but
which are marked as "Retired" in 2008.

The SOP Classes are:
1.2.840.10008.5.1.4.1.1.88.1 Text SR Storage -- Trial (Retired)
1.2.840.10008.5.1.4.1.1.88.2 Audio SR Storage -- Trial (Retired)
1.2.840.10008.5.1.4.1.1.88.3 Detail SR Storage -- Trial (Retired)
1.2.840.10008.5.1.4.1.1.88.4 Comprehensive SR Storage -- Trial (Retired)

Are those implemented anywhere (MESA? ctn?)? I understand these have
been used in trial implementations but have not made it into the
standard - but I could not find the Correction Proposals or Supplements
they are defined in.

Anyone who can shed a light? Yes, I know, I am really curious )

Kind regards,


Peter

Hi Peter

These were defined in sup23_fz.doc (released in 1997), which was what
we now refer to as a "draft for trial implementation".

They should never be used, since the final standard looked nothing like
what was originally proposed; the UIDs are only included in PS 3.6 to
remind us not to re-use them for something else.

Mitra and Acuson did release products that created some of these, which
they should not have done, so there may be a few samples floating around
in the real world. They are problematic because we reused some of the
data element tags with different VRs and different meanings in the final
standard (which in retrospect was a bad idea; we should have used new
tags in the standard).

The bottom line is that because of the conflict in VR and meaning of the
data elements between sup23_fz.doc and the actual standard, it is quite
difficult to write a single parser that supports both (in explicit VR
one can get by, but in implicit VR, one has to choose the VR based on
the SOP Class, and regardless, one has to choose the meaning of the data
element based on the SOP Class, both things that no parser I know of
bothers with).

David

Peter B Schmidt wrote:
> Hello c.p.d.,
>
> curious as I am, I came across the "Trial SR" SOP Classes in the 2008
> Standard (PS3.6-2008), that I could not find in the 2007 Documents, but
> which are marked as "Retired" in 2008.
>
> The SOP Classes are:
> 1.2.840.10008.5.1.4.1.1.88.1 Text SR Storage -- Trial (Retired)
> 1.2.840.10008.5.1.4.1.1.88.2 Audio SR Storage -- Trial (Retired)
> 1.2.840.10008.5.1.4.1.1.88.3 Detail SR Storage -- Trial (Retired)
> 1.2.840.10008.5.1.4.1.1.88.4 Comprehensive SR Storage -- Trial (Retired)
>
> Are those implemented anywhere (MESA? ctn?)? I understand these have
> been used in trial implementations but have not made it into the
> standard - but I could not find the Correction Proposals or Supplements
> they are defined in.
>
> Anyone who can shed a light? Yes, I know, I am really curious )
>
> Kind regards,
>
>
> Peter