dicom-validator-ts

A TypeScript library for validating DICOM files against the DICOM standard (PS3.3, PS3.6). Provides both a programmatic API and a CLI tool.

Features

• Validates VR (Value Representation) format compliance
• Validates VM (Value Multiplicity) constraints
• Validates IOD (Information Object Definition) compliance
• Evaluates conditional attributes (Type 1C/2C)
• Supports file path, Buffer, and ArrayBuffer inputs
• CLI tool for scripting and CI/CD pipelines
• Dual ESM + CommonJS output
• Full TypeScript type definitions

Installation

npm install dicom-validator-ts

API Usage

Validate a file

import { validate } from 'dicom-validator-ts';

const result = await validate('/path/to/file.dcm');

if (result.passed) {
  console.log('Validation passed');
} else {
  console.log(`Found ${result.summary.errors} errors`);
  for (const finding of result.findings) {
    console.log(`[${finding.severity}] ${finding.tag}: ${finding.message}`);
  }
}

Validate a Buffer

import { validate } from 'dicom-validator-ts';
import { readFileSync } from 'node:fs';

const buffer = readFileSync('/path/to/file.dcm');
const result = await validate(buffer);

Validate with options

import { validate } from 'dicom-validator-ts';

const result = await validate('/path/to/file.dcm', {
  checks: {
    vr: true,   // Enable VR validation (default: true)
    vm: true,   // Enable VM validation (default: true)
    iod: true,  // Enable IOD validation (default: true)
  },
  sopClassUID: '1.2.840.10008.5.1.4.1.1.2', // Override SOP Class auto-detection
  verbosity: 'verbose', // 'errors-only' | 'normal' | 'verbose'
});

Validate a pre-parsed Dataset

import { validateDataset, DicomDataset } from 'dicom-validator-ts';

const dataset = new DicomDataset();
// ... populate dataset ...

const result = await validateDataset(dataset);

Working with results

const result = await validate('/path/to/file.dcm');

// Check pass/fail
console.log(result.passed); // true if zero errors

// Get summary counts
console.log(result.summary); // { errors: 0, warnings: 2, infos: 5 }

// Filter findings by severity
const errors = result.getFindings('error');
const warnings = result.getFindings('warning');

// Serialize to JSON
const json = result.toJSON();

CLI Usage

npx dicom-validator-ts <files...> [options]

If installed globally (npm install -g dicom-validator-ts), the command is available as dicom-validator:

dicom-validator <files...> [options]

Examples

# Validate a single file
npx dicom-validator-ts scan.dcm

# Validate multiple files
npx dicom-validator-ts *.dcm

# Output as JSON
npx dicom-validator-ts scan.dcm --format json

# Only show errors (suppress warnings and info)
npx dicom-validator-ts scan.dcm --quiet

# Override SOP Class
npx dicom-validator-ts scan.dcm --sop-class 1.2.840.10008.5.1.4.1.1.2

Options

Option	Description
--format <text|json>	Output format (default: text)
--quiet	Suppress all output except errors
--sop-class <uid>	Override SOP Class UID auto-detection
--version	Print version and exit
--help	Print usage information and exit

Exit Codes

Code	Meaning
0	All files passed validation
1	One or more files had validation errors
2	Usage error (no files specified)

API Reference

Functions

• validate(input, options?) — Validate a DICOM file path, Buffer, or ArrayBuffer. Returns Promise<ValidationResult>.
• validateDataset(dataset, options?) — Validate a pre-parsed DicomDataset. Returns Promise<ValidationResult>.

Classes

• ValidationResult — Contains validation findings with passed, findings, summary, getFindings(severity), and toJSON().
• DicomDataset — Represents a parsed DICOM dataset with getElement(tag), hasTag(tag), and getString(tag).

Types

• ValidateOptions — Configuration for validation (checks, sopClassUID, verbosity).
• ValidationFinding — A single finding with severity, tag, module, message, and rule.
• ValidationSummary — Counts of errors, warnings, and infos.
• Severity — 'error' | 'warning' | 'info'
• DicomElement — A single DICOM element with tag, vr, value, and rawValue.
• DicomValue — Union type for DICOM values.

Error Classes

• DicomValidatorError — Base error class with a code field.
• FileNotFoundError — File does not exist.
• FileNotReadableError — File cannot be read (permissions).
• InvalidDicomError — Input is not valid DICOM.
• EmptyInputError — Input data is empty.
• TruncatedFileError — File is truncated mid-parse.

Requirements

• Node.js 18 or later

License

MIT