v1.4.1

Fixed

• processor.py: ChannelSensitivityCorrectionFactor tag now accessed with a safe fallback (1.0) instead of a bare attribute access that would crash on non-standard DICOM files
• processor.py: ChannelSensitivityUnitsSequence now handled with a fallback to 'uV' when the sequence is absent
• plotter.py: ChannelSourceSequence now accessed safely; missing sequence falls back to a generic label (Ch{n})
• plotter.py: PatientName tag now read via dicom.get() to avoid AttributeError on files where the tag is absent
• plotter.py: invalid layout ID now raises a clear ValueError instead of a cryptic KeyError
• reader.py: WADO requests now include a 30 s timeout and call raise_for_status(), with a readable error message on failure
• ecg.py: added public close() method and context manager support (with ECG(...) as ecg:)
• dicom-ecg-plot: removed Python 2 stdout fallback (project is Python 3 only)
• i18n.py: locale path is now absolute and relative to the module file, independent of the working directory

v1.4.0

Major refactor: the monolithic ECG class has been split into focused modules and the scipy dependency has been removed.

Added

• ecg/reader.py — DICOM reading and metadata extraction
• ecg/processor.py — waveform signal extraction and scaling
• ecg/plotter.py — Matplotlib rendering logic
• ecg/dsp.py — pure-Python DSP (Butterworth lowpass filter), replacing scipy
• --paper letter option in the CLI
• Graceful error handling in the CLI (invalid files, missing tags)

Changed

• Lead labels now resolved via DICOM CodeValue lookup instead of text manipulation
• DICOM date and patient age parsing made more robust (handles missing or malformed tags)
• All internal comments and docstrings translated from Italian to English

Removed

• scipy dependency