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LIDC Message System:
Development for Phase 1 implementation

First panel is an overview diagram and the rest are descriptions of each of the steps, numbered from 1 to 13.

Overview Diagram

Number 1 (red) X Site anonymization computer connected to Site A
Secure transver to LIDC computer

Number 12 (red) Need tracking software at each site for word-list
A Number 6 (grey), Number 10 (yellow) All 4 reads must be received (and at end of unblinded reviews, reconciled) by computer A

Number 11 (red) Other subject data field linked to case
SSH or secure FTP for transfer, with a script developed as required

Number 2 (yellow) Image send of 1 to computers B,C,D,E

Number 13 (red)Possible NCI-based status display program

Number 3 (grey), Number 7 (yellow) XML reading assignment message sent to computers at sites B, C,D.E

Number 5 (grey), Number 9 (yellow) XML Reading Response Message,
With Contour file and review data,
Sent back only to sending site, computer A, for each case

Number 4 (grey), Number 8 (yellow) Marking tools must be available for each computer for radiologist marking
B, C, D, E Remote "other site" computer

Number 1 (all colors) Denotes tasks to be developed and integrated
Number 3,4,5,6 (Gray) Denotes blinded review tasks
Number 7,8,9,10 (yellow) Denotes UnBlinded review tasks

Description of Each Step

Number 1. Anonymization
Such as the U. Michigan software
Anonymize
Scrub certain fields
Set others to NULL
See Process Model 2.4 for details

Number 2. Broadcast Anonymized Image data
In DICOM format
Using rsync or other mechanism

Number 3. Initial Reading Assignment
XML Message (First Blinded Review)
In specified message format
With specified message content

• Coded to Identify as Blinded Review
• Case id
• Reader id
• Etc.

Broadcast to Sites B, C, D, E

Number 4. Blinded Review - Marking Tool

• Assigned reader at each site (B, C, D, E) uses review and marking software
  • Creates Boundaries for Nodules > =3 mm
  • Marks centroid for Nodules
  • Marks centroid for Non-Nodules > =3mm
  • Labels each object (Nodule or Non-Nodule) as described in Process Model 2.4
• Software converts boundaries from internal format to LIDC TG-2 specified format in XML

Number 5. Blinded Review Response
XML Message
In specified message format
With specified message content

• Coded to Identify as Blinded
• Case id, Reader id
• Boundary data also in specified XML format
• Radiologist Reading CDEs (Labelings, etc.)

Number 6. Receive Blinded Reviews
Receive Reviews at Originating Site At end of Blinded review

• Store Individual Reads in local (Level 1) dB
• Create pMap??
• Merge the required number (4) of remote site reviews to create XML file with composite reviews

Number 7. Unblinded Reading Assignment XML Message

• When all required (4) Blinded Reviews have been received and compiled, then
• Send Unblinded Reading Assignment Message:
• In specified message format
• With specified message content
• Coded to Identify as UnBlinded Review
• Case id
• Reader id
• Etc.
• Transmit Composite Blinded Review Data (created in Step 6) as part of message
• Broadcast to Sites B, C, D, E

Number 8. Unblinded Review - Marking Tool

• Assigned reader at each site (B, C, D, E) uses review and marking software
• Each Reader sees all markings of all readers (anonymized)
• Each Reader sees their own markings uniquely distinguished
• Each Reader Creates their own Unblinded Review by Editing their Blinded Review results
  • Accepting or Rejecting Their own Markings
  • Accepting or Rejecting the Markings of Others
  • Allow Editing of Boundaries
  • Allow Editing of Object Labeling (or Labeling of new objects)
• Software converts boundaries from internal format to LIDC TG-2 specified format in XML

Number 9. UnBlinded Review Response
XML Message
In specified message format
With specified message content

• Coded to Identify as UnBlinded
• Case id, Reader id
• Boundary data in specified XML format
• Radiologist Reading CDEs (Labelings, etc.)

Number 10. Receive UnBlinded Reviews
Receive Reviews at Originating Site At end of UnBlinded review

• Store Individual UnBlinded Reads in local (Level 1) dB
• Perform reconciliation.
• Create pMap

Number 11. Other Subject Data
At other points in time, Site A may enter other data that will be linked to case or nodule:
Pathology (of an individual nodule)
Ethnicity
Smoking History
To be entered at Local (Level 1) database

Number 12. Monitoring
Software needed at each site to Monitor and help manage:
Each case submitted (by Site A), to track

• Reader Assignments
• Completion Status

Each Reader (at Site A), to track

• Case assignments
• Assignment Type (Blinded/Unblinded)
• Completion Status

Number 13. Possible NCI Based Status Reporting
Centralized location to which all messages are sent
Status of all cases centrally displayed