Overview

S3-based object storage for medical imaging studies (X-rays, CT scans, MRIs) in DICOM format, integrated with PACS for long-term archival.

Storage Architecture

• DICOM Images: Medical images in DICOM format with metadata
• Long-term Archive: 10-year retention for regulatory compliance
• Encrypted: Server-side encryption with KMS
• Lifecycle Policies: Automated tiering to Glacier for cost optimization

Technical Details

Specifications:

• Storage Class: S3 Standard → S3 IA → Glacier Deep Archive
• Total Size: 50 TB (growing 5 TB/year)
• Encryption: SSE-KMS (AWS KMS)
• Versioning: Enabled for audit trail
• Replication: Cross-region replication to us-west-2

Lifecycle Policy:

• 0-90 days: S3 Standard (frequent access)
• 90 days - 2 years: S3 Intelligent-Tiering
• 2-10 years: Glacier Deep Archive

File Organization

s3://medical-imaging-prod/
├── dicom/
│   ├── {year}/
│   │   ├── {month}/
│   │   │   ├── {patient_mrn}/
│   │   │   │   ├── {study_uid}/
│   │   │   │   │   ├── {series_uid}/
│   │   │   │   │   │   ├── {instance_uid}.dcm

Access Patterns

• Imaging Service: Write DICOM images from modalities, read for radiologist viewing
• PACS Integration: Read/Write for image archival and retrieval
• EHR Service: Metadata linking to imaging studies

Compliance & Retention

• HIPAA Compliant: PHI in DICOM metadata
• Retention: 10 years per medical imaging regulations
• Immutable: Object Lock enabled for legal compliance
• Audit Logging: S3 access logs retained for 7 years