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← Section VI · Miscellaneous Topics (Role of Echo)
VI.K

Digital Lab

4 cards

Notes

Digital echo lab workflow

  • DICOM (Digital Imaging and Communications in Medicine) - universal medical imaging standard for echo storage, transfer, and viewing.
  • PACS - Picture Archiving and Communication System for image storage and cross-departmental access.
  • Structured reporting - semi-standardized reports for consistency, mining, and quality tracking.

Image compression

  • Lossless - preserves all pixels (larger files, no quality loss).
  • Lossy (JPEG) - smaller files, some visual information lost. Acceptable ratios preserve diagnostic quality.

Advantages of digital storage over VHS/optical disc

  • Instant retrieval and comparison to prior studies.
  • Simultaneous multi-user viewing.
  • Remote review and teleconsultation.
  • Integration with structured reporting and EMR.

AI and machine learning in echo

  • Automated chamber quantification (LV volumes, EF).
  • Automated valve tracking and strain analysis.
  • Diagnostic classification (amyloid, cardiomyopathy screening).
  • View labeling and quality control.
  • Not a replacement for physician interpretation - supplements workflow.

Data storage & backup

  • Redundant storage (RAID + off-site backup) to protect against data loss.
  • HIPAA-compliant PHI handling.
  • Retention: adult studies typically 5 years minimum (state and institution-dependent); pediatric may be longer.

Interoperability

  • HL7 for demographic and order data.
  • DICOM MWL (Modality Worklist) for order routing from EMR to ultrasound systems.

Cards

  • basicVI.K-001
    What is DICOM?
    → Digital Imaging and Communications in Medicine — the universal standard file format and network protocol for storing, transferring, and displaying medical imaging including echocardiograms.
  • basicVI.K-002
    What is PACS?
    → Picture Archiving and Communication System — a networked system for medical image storage, retrieval, and cross-departmental access.
  • basicVI.K-003
    Compare lossless vs lossy JPEG compression for echo storage.
    → Lossless: preserves all pixel data, larger files, no quality loss. Lossy (JPEG): smaller files at the cost of some visual information; diagnostic quality can be preserved with appropriate compression ratios.
  • basicVI.K-004
    Which communication standard is used for hospital order routing to imaging systems?
    → HL7 (for demographic/order data) combined with DICOM Modality Worklist (MWL) for routing orders from the EMR to the imaging device.