Ultrasound Studies Open Very Slowly in OHIF Viewer via Orthanc DICOMweb

General
1

Hello Orthanc Team,

We are experiencing a performance issue when opening Ultrasound studies through OHIF Viewer connected to Orthanc via DICOMweb.

Issue:
Ultrasound studies take a considerable amount of time to open in OHIF Viewer. In some cases, users wait several seconds before images begin loading. This affects clinical workflow and user experience.

Observations:

  • The issue is mainly noticeable with Ultrasound studies.
  • Once loaded, navigation is generally acceptable.
  • We would like to understand whether this could be related to:
    * DICOMweb performance
    * PostgreSQL indexing/query performance
    * Large metadata retrieval
    * Orthanc configuration
    * Viewer-side rendering

Could the Orthanc team please advise:

  1. Are there recommended optimizations for large Orthanc installations?
  2. Are there known performance considerations specific to Ultrasound studies?

Any guidance would be greatly appreciated.

2

Hello @jemitsanghvi - may you please post some details about your setup? configuration files for OHIF and Orthanc, docker settings if they’re containers, server specs, Orthanc /system stats

3

And you should also check the size of the US files. Many of them are 200-300 MB and they just need time to be downloaded …

4

Apologies for the delay. Here you go

**Server specs : **
===== Operating System =====
WindowsProductName : Windows Server 2022 Standard
WindowsVersion : 2009
OsBuildNumber : 20348
OsArchitecture : 64-bit
CsName : WIN-G449GLEBT3H
CsManufacturer : Dell Inc.
CsModel : PowerEdge R750
BiosFirmwareType : Uefi

===== System Information =====
Host Name:                 WIN-G449GLEBT3H
OS Name:                   Microsoft Windows Server 2022 Standard
OS Version:                10.0.20348 N/A Build 20348
OS Manufacturer:           Microsoft Corporation
System Manufacturer:       Dell Inc.
System Model:              PowerEdge R750
System Type:               x64-based PC
Processor(s):              2 Processor(s) Installed.

Total Physical Memory:     130,524 MB
Available Physical Memory: 69,542 MB
Virtual Memory: Max Size:  135,715 MB
Virtual Memory: Available: 72,000 MB
Virtual Memory: In Use:    63,715 MB

===== Total RAM =====
127.464443206787

===== Disk Drives =====
DeviceID VolumeName FileSystem Size(GB) Free(GB)
-------- ---------- ---------- -------- --------
C:                  NTFS            446    365.5
D:       Expansion  exFAT      20489.46 14518.62
G:       STORAGE    NTFS        5587.48  1504.05

Orthanc / system stats : 24266 Studies in Orthanc Server

And Attached is configuration file.

orthanc (1).json (3.4 KB)