dicom_viewer 0.6.0 
dicom_viewer: ^0.6.0 copied to clipboard
A pure-Dart DICOM viewer for Flutter. Parses uncompressed, RLE, and JPEG DICOM files, applies VOI windowing and PALETTE LUTs, and renders images across Web, Desktop, and Mobile.
import 'dart:async';
import 'dart:typed_data';
import 'package:dicom_viewer/dicom_viewer.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
void main() {
runApp(const DicomViewerExampleApp());
}
class DicomViewerExampleApp extends StatelessWidget {
const DicomViewerExampleApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'DICOM Viewer Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData.dark(useMaterial3: true).copyWith(
scaffoldBackgroundColor: const Color(0xFF121212),
colorScheme: ColorScheme.fromSeed(
seedColor: Colors.cyan,
brightness: Brightness.dark,
),
),
home: const DicomViewerScreen(),
);
}
}
class DicomViewerScreen extends StatefulWidget {
const DicomViewerScreen({super.key});
@override
State<DicomViewerScreen> createState() => _DicomViewerScreenState();
}
class _DicomViewerScreenState extends State<DicomViewerScreen> {
DicomDataset? _dataset;
String? _fileName;
bool _isLoading = false;
String? _error;
double? _activeWc;
double? _activeWw;
// Interactive Viewer State
bool _enableZoom = true;
DicomTool _selectedTool = DicomTool.pan;
double _currentScale = 1.0;
Offset _currentOffset = Offset.zero;
// Multi-Frame Navigation & Cine Playback State
int _currentFrame = 0;
Timer? _playTimer;
bool get _isPlaying => _playTimer != null && _playTimer!.isActive;
/// Incremented only on explicit preset selection, reset, or new-file load.
/// Changing this key forces DicomImageWidget to recreate with the intended
/// initialWindowCenter/Width. Tool switching and frame scrubbing do NOT
/// increment this — the build() method handles structural changes without
/// recreating state.
int _presetGeneration = 0;
@override
void dispose() {
_stopPlayback();
super.dispose();
}
void _stopPlayback() {
_playTimer?.cancel();
_playTimer = null;
}
void _setFrame(int frame) {
if (_dataset == null) return;
final total = _dataset!.numberOfFrames;
if (total <= 1) return;
setState(() {
_currentFrame = frame.clamp(0, total - 1);
});
}
void _togglePlayback() {
if (_isPlaying) {
setState(() {
_stopPlayback();
});
} else {
if (_dataset == null || _dataset!.numberOfFrames <= 1) return;
setState(() {
_playTimer = Timer.periodic(const Duration(milliseconds: 200), (_) {
if (!mounted || _dataset == null || _dataset!.numberOfFrames <= 1) {
_stopPlayback();
return;
}
setState(() {
_currentFrame = (_currentFrame + 1) % _dataset!.numberOfFrames;
});
});
});
}
}
Future<void> _pickFile() async {
_stopPlayback();
setState(() {
_isLoading = true;
_error = null;
});
try {
final result = await FilePicker.platform.pickFiles(
type: FileType.any,
withData: true,
);
if (result != null && result.files.isNotEmpty) {
final file = result.files.first;
final Uint8List? bytes = file.bytes;
if (bytes == null || bytes.isEmpty) {
throw Exception('Failed to read file bytes. Selected file is empty.');
}
final dataset = DicomDataset.fromBytes(bytes);
setState(() {
_dataset = dataset;
_fileName = file.name;
_activeWc = dataset.windowCenter;
_activeWw = dataset.windowWidth;
_currentScale = 1.0;
_currentOffset = Offset.zero;
_currentFrame = 0;
_isLoading = false;
_presetGeneration++; // new file → fresh initial values
});
} else {
setState(() {
_isLoading = false;
});
}
} catch (e) {
setState(() {
_error = e.toString();
_isLoading = false;
});
}
}
void _loadSampleDicom() {
_stopPlayback();
setState(() {
_isLoading = true;
_error = null;
});
try {
final bytes = _generateSampleCtDicom();
final dataset = DicomDataset.fromBytes(bytes);
setState(() {
_dataset = dataset;
_fileName = 'Sample_CT_Head.dcm';
_activeWc = dataset.windowCenter;
_activeWw = dataset.windowWidth;
_currentScale = 1.0;
_currentOffset = Offset.zero;
_currentFrame = 0;
_isLoading = false;
_presetGeneration++; // new sample → fresh initial values
});
} catch (e) {
setState(() {
_error = e.toString();
_isLoading = false;
});
}
}
void _applyPreset(double center, double width) {
setState(() {
_activeWc = center;
_activeWw = width;
_presetGeneration++; // explicit preset → recreate widget with preset initial values
});
}
void _resetWindowing() {
if (_dataset != null) {
setState(() {
_activeWc = _dataset!.windowCenter;
_activeWw = _dataset!.windowWidth;
_currentScale = 1.0;
_currentOffset = Offset.zero;
_presetGeneration++; // explicit reset → recreate widget with original initial values
});
}
}
void _showDisclaimerDialog(BuildContext context) {
showDialog<void>(
context: context,
builder:
(ctx) => AlertDialog(
title: const Row(
children: [
Icon(
Icons.medical_information_outlined,
color: Colors.cyanAccent,
size: 22,
),
SizedBox(width: 8),
Text(
'Medical Use Disclaimer',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
],
),
content: const SingleChildScrollView(
child: Text(
'Medical Use Disclaimer: This example is for software development, research, testing, and visualization purposes. It is not a certified or approved medical device and is not intended for primary clinical diagnosis, treatment, or patient-care decisions.\n\nDevelopers are responsible for determining the suitability, validation, regulatory requirements, and intended use of applications built using this library.',
style: TextStyle(
fontSize: 13,
color: Colors.white70,
height: 1.4,
),
),
),
actions: [
TextButton(
onPressed: () => Navigator.of(ctx).pop(),
child: const Text(
'OK',
style: TextStyle(color: Colors.cyanAccent),
),
),
],
),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('DICOM Viewer Demo'),
actions: [
IconButton(
icon: const Icon(Icons.info_outline),
tooltip: 'Medical Use Disclaimer',
onPressed: () => _showDisclaimerDialog(context),
),
IconButton(
icon: const Icon(Icons.analytics_outlined),
tooltip: 'Load Sample CT',
onPressed: _loadSampleDicom,
),
IconButton(
icon: const Icon(Icons.folder_open),
tooltip: 'Open DICOM File',
onPressed: _pickFile,
),
],
),
body: Column(
children: [
// Clinical Preset Buttons & Interactive Mode Toggle Bar
if (_dataset != null)
Container(
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
color: const Color(0xFF1A1A1A),
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Row(
children: [
// Mode Toggle: Interactive Pan & Zoom vs Legacy Windowing
Container(
padding: const EdgeInsets.symmetric(
horizontal: 8,
vertical: 2,
),
decoration: BoxDecoration(
color: Colors.cyan.withValues(alpha: 0.15),
borderRadius: BorderRadius.circular(8),
border: Border.all(
color: Colors.cyan.withValues(alpha: 0.4),
),
),
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
Icon(
_enableZoom ? Icons.zoom_in : Icons.contrast,
size: 16,
color: Colors.cyanAccent,
),
const SizedBox(width: 6),
Text(
_enableZoom ? 'Interactive Mode' : 'Legacy Mode',
style: const TextStyle(
fontSize: 12,
fontWeight: FontWeight.bold,
color: Colors.cyanAccent,
),
),
Switch(
value: _enableZoom,
activeThumbColor: Colors.cyanAccent,
onChanged: (val) {
setState(() {
_enableZoom = val;
});
},
),
],
),
),
if (_enableZoom) ...[
const SizedBox(width: 8),
SegmentedButton<DicomTool>(
segments: const [
ButtonSegment<DicomTool>(
value: DicomTool.pan,
icon: Icon(Icons.pan_tool_outlined, size: 14),
label: Text(
'Pan & Zoom',
style: TextStyle(fontSize: 11),
),
),
ButtonSegment<DicomTool>(
value: DicomTool.windowing,
icon: Icon(Icons.contrast, size: 14),
label: Text(
'Windowing',
style: TextStyle(fontSize: 11),
),
),
ButtonSegment<DicomTool>(
value: DicomTool.measure,
icon: Icon(Icons.straighten, size: 14),
label: Text(
'Measure',
style: TextStyle(fontSize: 11),
),
),
ButtonSegment<DicomTool>(
value: DicomTool.rectangleRoi,
icon: Icon(Icons.crop_square, size: 14),
label: Text(
'Rect ROI',
style: TextStyle(fontSize: 11),
),
),
ButtonSegment<DicomTool>(
value: DicomTool.probe,
icon: Icon(Icons.colorize, size: 14),
label: Text(
'Probe',
style: TextStyle(fontSize: 11),
),
),
],
selected: {_selectedTool},
onSelectionChanged: (newSelection) {
setState(() {
_selectedTool = newSelection.first;
});
},
style: const ButtonStyle(
visualDensity: VisualDensity.compact,
tapTargetSize: MaterialTapTargetSize.shrinkWrap,
),
),
],
const SizedBox(width: 12),
const Text(
'Presets: ',
style: TextStyle(
fontSize: 12,
fontWeight: FontWeight.bold,
color: Colors.white70,
),
),
_PresetChip(
label: '🧠 Brain (40/80)',
onPressed: () => _applyPreset(40, 80),
),
const SizedBox(width: 6),
_PresetChip(
label: '🫁 Lung (-600/1500)',
onPressed: () => _applyPreset(-600, 1500),
),
const SizedBox(width: 6),
_PresetChip(
label: '🦴 Bone (400/1800)',
onPressed: () => _applyPreset(400, 1800),
),
const SizedBox(width: 6),
_PresetChip(
label: '🩺 Soft Tissue (40/400)',
onPressed: () => _applyPreset(40, 400),
),
const SizedBox(width: 6),
ActionChip(
avatar: const Icon(Icons.refresh, size: 14),
label: const Text(
'Reset',
style: TextStyle(fontSize: 12),
),
onPressed: _resetWindowing,
),
],
),
),
),
// Main Display Area
Expanded(
child:
_isLoading
? const Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
CircularProgressIndicator(),
SizedBox(height: 16),
Text('Parsing DICOM file...'),
],
),
)
: _error != null
? Center(
child: Padding(
padding: const EdgeInsets.all(24.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Icon(
Icons.error_outline,
color: Colors.red,
size: 48,
),
const SizedBox(height: 16),
Text(
'Error loading DICOM file:\n$_error',
textAlign: TextAlign.center,
style: const TextStyle(color: Colors.redAccent),
),
const SizedBox(height: 24),
ElevatedButton.icon(
onPressed: _pickFile,
icon: const Icon(Icons.folder_open),
label: const Text('Try Another File'),
),
],
),
),
)
: _dataset == null
? Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Icon(
Icons.medical_services_outlined,
size: 64,
color: Colors.cyan.shade300,
),
const SizedBox(height: 16),
const Text(
'No DICOM file loaded',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 8),
const Text(
'Select a DICOM file (.dcm) or load sample.',
style: TextStyle(color: Colors.white60),
),
const SizedBox(height: 24),
Wrap(
spacing: 12,
runSpacing: 12,
alignment: WrapAlignment.center,
children: [
ElevatedButton.icon(
onPressed: _loadSampleDicom,
icon: const Icon(Icons.science_outlined),
label: const Text('Load Sample CT'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.cyan.shade800,
foregroundColor: Colors.white,
),
),
ElevatedButton.icon(
onPressed: _pickFile,
icon: const Icon(Icons.folder_open),
label: const Text('Select DICOM File'),
),
],
),
const SizedBox(height: 32),
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 24.0,
),
child: Text(
'Medical Use Disclaimer: This example is for software development, research, testing, and visualization purposes. It is not a certified or approved medical device and is not intended for primary clinical diagnosis, treatment, or patient-care decisions.',
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 11,
color: Colors.white.withValues(alpha: 0.38),
height: 1.3,
),
),
),
],
),
)
: Stack(
children: [
Positioned.fill(
child: DicomImageWidget(
// Key only changes on: explicit preset, reset, or new-file
// load (via _presetGeneration). Tool switching and frame scrubbing
// do NOT recreate the widget — the build() method
// handles those structurally, preserving internal WC/WW state.
key: ValueKey(
'${_fileName ?? ""}-$_presetGeneration',
),
dataset: _dataset!,
frameIndex: _currentFrame,
initialWindowCenter: _activeWc,
initialWindowWidth: _activeWw,
enableZoom: _enableZoom,
tool: _selectedTool,
showOverlay: true,
onWindowChanged: (center, width) {
// Track silently — no setState to avoid unnecessary
// rebuilds during drag. Values are up-to-date whenever
// _presetGeneration increments and the widget recreates.
_activeWc = center;
_activeWw = width;
},
onViewChanged: (scale, offset) {
setState(() {
_currentScale = scale;
_currentOffset = offset;
});
},
),
),
// Gesture Legend / Guidance Card
Positioned(
top: 12,
right: 12,
child: Container(
padding: const EdgeInsets.all(10),
decoration: BoxDecoration(
color: Colors.black.withValues(alpha: 0.75),
borderRadius: BorderRadius.circular(8),
border: Border.all(color: Colors.white24),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
!_enableZoom
? 'Legacy Windowing Mode:'
: _selectedTool == DicomTool.pan
? 'Interactive Pan & Zoom Tool:'
: _selectedTool == DicomTool.windowing
? 'Interactive Windowing Tool:'
: _selectedTool == DicomTool.rectangleRoi
? 'Interactive Rectangle ROI Tool:'
: _selectedTool == DicomTool.probe
? 'Interactive Pixel Probe Tool:'
: 'Interactive Measurement Tool:',
style: TextStyle(
fontSize: 11,
fontWeight: FontWeight.bold,
color:
(_selectedTool == DicomTool.measure ||
_selectedTool ==
DicomTool.rectangleRoi ||
_selectedTool ==
DicomTool.probe)
? Colors.yellowAccent
: Colors.cyanAccent,
),
),
const SizedBox(height: 4),
if (_enableZoom) ...[
if (_selectedTool == DicomTool.pan)
const Text(
'🖐️ Drag: Pan Image Viewport',
style: TextStyle(
fontSize: 10,
color: Colors.white70,
),
)
else if (_selectedTool == DicomTool.windowing)
const Text(
'🖐️ Drag: Adjust Contrast / Brightness',
style: TextStyle(
fontSize: 10,
color: Colors.white70,
),
)
else if (_selectedTool ==
DicomTool.rectangleRoi)
const Text(
'📐 Drag: Draw Rectangle ROI',
style: TextStyle(
fontSize: 10,
color: Colors.yellowAccent,
),
)
else if (_selectedTool == DicomTool.probe)
const Text(
'🎯 Hover: Inspect Pixel Coordinate & Intensity',
style: TextStyle(
fontSize: 10,
color: Colors.yellowAccent,
),
)
else
const Text(
'📏 Drag: Draw 2D Distance Caliper Line',
style: TextStyle(
fontSize: 10,
color: Colors.yellowAccent,
),
),
const Text(
'🔍 Pinch / Wheel: Zoom Image (0.5x - 5.0x)',
style: TextStyle(
fontSize: 10,
color: Colors.white70,
),
),
] else ...[
const Text(
'🖐️ Drag: Adjust Contrast / Brightness',
style: TextStyle(
fontSize: 10,
color: Colors.white70,
),
),
],
const Text(
'👆 Double-Tap: Reset Scale & Windowing',
style: TextStyle(
fontSize: 10,
color: Colors.white70,
),
),
],
),
),
),
],
),
),
// Multi-Frame Navigation Bar (Only visible when numberOfFrames > 1)
if (_dataset != null && _dataset!.numberOfFrames > 1)
Container(
padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 6),
color: const Color(0xFF161616),
child: Row(
children: [
IconButton(
icon: Icon(
_isPlaying
? Icons.pause_circle_filled
: Icons.play_circle_filled,
),
color: Colors.cyanAccent,
iconSize: 28,
tooltip:
_isPlaying
? 'Pause Cine Playback'
: 'Start Cine Playback',
onPressed: _togglePlayback,
),
IconButton(
icon: const Icon(Icons.skip_previous, size: 20),
tooltip: 'Previous Frame',
onPressed:
_currentFrame > 0
? () {
_stopPlayback();
_setFrame(_currentFrame - 1);
}
: null,
),
Expanded(
child: SliderTheme(
data: SliderTheme.of(context).copyWith(
activeTrackColor: Colors.cyanAccent,
inactiveTrackColor: Colors.white24,
thumbColor: Colors.cyanAccent,
overlayColor: Colors.cyanAccent.withValues(alpha: 0.2),
trackHeight: 3,
thumbShape: const RoundSliderThumbShape(
enabledThumbRadius: 6,
),
),
child: Slider(
value: _currentFrame.toDouble().clamp(
0.0,
(_dataset!.numberOfFrames - 1).toDouble(),
),
min: 0.0,
max: (_dataset!.numberOfFrames - 1).toDouble(),
divisions: _dataset!.numberOfFrames - 1,
onChanged: (val) {
_stopPlayback();
_setFrame(val.round());
},
),
),
),
IconButton(
icon: const Icon(Icons.skip_next, size: 20),
tooltip: 'Next Frame',
onPressed:
_currentFrame < _dataset!.numberOfFrames - 1
? () {
_stopPlayback();
_setFrame(_currentFrame + 1);
}
: null,
),
const SizedBox(width: 8),
Container(
padding: const EdgeInsets.symmetric(
horizontal: 10,
vertical: 4,
),
decoration: BoxDecoration(
color: Colors.white10,
borderRadius: BorderRadius.circular(6),
border: Border.all(color: Colors.white24),
),
child: Text(
'Frame ${_currentFrame + 1} / ${_dataset!.numberOfFrames}',
style: const TextStyle(
fontSize: 12,
fontWeight: FontWeight.bold,
color: Colors.cyanAccent,
),
),
),
],
),
),
// Metadata & Controls Footer
if (_dataset != null)
Container(
padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
color: const Color(0xFF1E1E1E),
child: Row(
children: [
Expanded(
child: Text(
'File: ${_fileName ?? "Unsaved"} | Modality: ${_dataset!.modality} | Size: ${_dataset!.columns}x${_dataset!.rows}${_dataset!.numberOfFrames > 1 ? " | Frame: ${_currentFrame + 1}/${_dataset!.numberOfFrames}" : ""}\nRescale: ${_dataset!.rescaleSlope}x + ${_dataset!.rescaleIntercept} | Zoom: ${_currentScale.toStringAsFixed(2)}x | Offset: (${_currentOffset.dx.toStringAsFixed(0)}, ${_currentOffset.dy.toStringAsFixed(0)})',
style: const TextStyle(
fontSize: 11,
color: Colors.white70,
),
),
),
ElevatedButton.icon(
onPressed: _pickFile,
icon: const Icon(Icons.folder_open, size: 16),
label: const Text('Open'),
),
],
),
),
],
),
);
}
Uint8List _generateSampleCtDicom() {
final builder = BytesBuilder();
// 128 bytes preamble
builder.add(List.filled(128, 0));
// Prefix 'DICM'
builder.add([0x44, 0x49, 0x43, 0x4D]);
// Group 0002 Meta Header
_writeTag(
builder,
0x0002,
0x0010,
'UI',
'1.2.840.10008.1.2.1',
); // Explicit VR Little Endian
// Dataset Metadata
_writeTag(builder, 0x0008, 0x0060, 'CS', 'CT');
_writeTag(builder, 0x0010, 0x0010, 'PN', 'Sample^HeadCT');
_writeTag(builder, 0x0010, 0x0020, 'LO', 'CT-10293');
_writeTag(builder, 0x0028, 0x0002, 'US', 1); // SamplesPerPixel
_writeTag(builder, 0x0028, 0x0004, 'CS', 'MONOCHROME2');
_writeTag(builder, 0x0028, 0x0010, 'US', 256); // Rows
_writeTag(builder, 0x0028, 0x0011, 'US', 256); // Columns
_writeTag(builder, 0x0028, 0x0100, 'US', 16); // BitsAllocated
_writeTag(builder, 0x0028, 0x0101, 'US', 16); // BitsStored
_writeTag(builder, 0x0028, 0x0102, 'US', 15); // HighBit
_writeTag(
builder,
0x0028,
0x0103,
'US',
1,
); // PixelRepresentation (Signed 2's complement)
_writeTag(builder, 0x0028, 0x1050, 'DS', '40'); // WindowCenter
_writeTag(builder, 0x0028, 0x1051, 'DS', '400'); // WindowWidth
_writeTag(builder, 0x0028, 0x1052, 'DS', '-1024'); // RescaleIntercept
_writeTag(builder, 0x0028, 0x1053, 'DS', '1.0'); // RescaleSlope
// Generate 256x256 synthetic CT head phantom pixel data
final pixelsBuilder = BytesBuilder();
const width = 256;
const height = 256;
const centerX = 128;
const centerY = 128;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
final dx = x - centerX;
final dy = y - centerY;
final distSq = dx * dx + dy * dy;
int hu = -1000; // Air
if (distSq < 110 * 110) {
if (distSq > 95 * 95) {
hu = 1000; // Skull Bone
} else if (distSq < 30 * 30) {
hu = 15; // Ventricles CSF
} else {
hu = 40; // Brain Soft Tissue
}
}
final storedPixel = hu + 1024; // Reverse Rescale Intercept (-1024)
final ByteData bd = ByteData(2)
..setInt16(0, storedPixel, Endian.little);
pixelsBuilder.add(bd.buffer.asUint8List());
}
}
final pixelBytes = pixelsBuilder.toBytes();
// Pixel Data (7FE0,0010) OB/OW
builder.add([0xE0, 0x7F, 0x10, 0x00]); // Tag (7FE0,0010)
builder.add([0x4F, 0x57]); // VR 'OW'
builder.add([0x00, 0x00]); // Reserved
final lenBd = ByteData(4)..setUint32(0, pixelBytes.length, Endian.little);
builder.add(lenBd.buffer.asUint8List());
builder.add(pixelBytes);
return builder.toBytes();
}
void _writeTag(
BytesBuilder bb,
int group,
int element,
String vrStr,
dynamic val,
) {
bb.add([
group & 0xFF,
(group >> 8) & 0xFF,
element & 0xFF,
(element >> 8) & 0xFF,
]);
final vrBytes = vrStr.codeUnits;
bb.add(vrBytes);
Uint8List valBytes;
if (vrStr == 'US') {
valBytes =
(ByteData(2)
..setUint16(0, val as int, Endian.little)).buffer.asUint8List();
} else {
final strVal = val.toString();
var b = strVal.codeUnits;
if (b.length % 2 != 0) {
b = [...b, 0x20]; // Space padding
}
valBytes = Uint8List.fromList(b);
}
if (vrStr == 'OB' ||
vrStr == 'OW' ||
vrStr == 'SQ' ||
vrStr == 'UN' ||
vrStr == 'UT') {
bb.add([0x00, 0x00]);
final lenBd = ByteData(4)..setUint32(0, valBytes.length, Endian.little);
bb.add(lenBd.buffer.asUint8List());
} else {
final lenBd = ByteData(2)..setUint16(0, valBytes.length, Endian.little);
bb.add(lenBd.buffer.asUint8List());
}
bb.add(valBytes);
}
}
class _PresetChip extends StatelessWidget {
final String label;
final VoidCallback onPressed;
const _PresetChip({required this.label, required this.onPressed});
@override
Widget build(BuildContext context) {
return ActionChip(
label: Text(label, style: const TextStyle(fontSize: 12)),
onPressed: onPressed,
backgroundColor: const Color(0xFF2A2A2A),
);
}
}Metadata
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A pure-Dart DICOM viewer for Flutter. Parses uncompressed, RLE, and JPEG DICOM files, applies VOI windowing and PALETTE LUTs, and renders images across Web, Desktop, and Mobile.
Repository (GitHub)
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Topics
#dicom #medical-imaging #radiology #viewer #flutter
License
MIT (license)