diff --git a/lib/services/raw_capture_service.dart b/lib/services/raw_capture_service.dart
index 545858b..338c256 100644
--- a/lib/services/raw_capture_service.dart
+++ b/lib/services/raw_capture_service.dart
@@ -125,16 +125,6 @@
   /// DNG ファイルのバイト数（書き込み確認用）．
   final int dngFileSize;
 
-  /// 縮小プレビュー JPEG の絶対パス．
-  ///
-  /// Kotlin 側でプレビュー生成に失敗した場合は null．
-  final String? previewPath;
-
-  /// プレビュー JPEG のバイト数．
-  ///
-  /// Kotlin 側でプレビュー生成に失敗した場合は null．
-  final int? previewFileSize;
-
   /// 撮影メタデータ（設定値・実測値・センサ特性など）．
   final Map<String, dynamic> metadata;
 
@@ -150,8 +140,6 @@
   const QuantitativeCaptureResult({
     required this.dngPath,
     required this.dngFileSize,
-    this.previewPath,
-    this.previewFileSize,
     required this.metadata,
     this.lscMap,
     this.lscMapRowCount,
@@ -163,9 +151,6 @@
     final dngPath = map['dngPath'] as String;
     final dngFileSize = (map['dngFileSize'] as num).toInt();
 
-    final previewPath = map['previewPath'] as String?;
-    final previewFileSize = (map['previewFileSize'] as num?)?.toInt();
-
     final rawMetadata = map['metadata'];
     final metadata = (_deepConvert(rawMetadata) as Map<String, dynamic>?) ?? {};
 
@@ -184,8 +169,6 @@
     return QuantitativeCaptureResult(
       dngPath: dngPath,
       dngFileSize: dngFileSize,
-      previewPath: previewPath,
-      previewFileSize: previewFileSize,
       metadata: metadata,
       lscMap: lscMap,
       lscMapRowCount: lscMapRowCount,
diff --git a/test/services/raw_capture_service_test.dart b/test/services/raw_capture_service_test.dart
index 3b0c729..f63ccbf 100644
--- a/test/services/raw_capture_service_test.dart
+++ b/test/services/raw_capture_service_test.dart
@@ -138,78 +138,5 @@
       expect(row[1], closeTo(2.0, 0.0001));
       expect(row[2], closeTo(3.14, 0.0001));
     });
-
-    // --- previewPath / previewFileSize 関連テスト ---
-
-    test('previewPath と previewFileSize が両方 non-null の場合，フィールドに値がセットされる', () {
-      final map = <dynamic, dynamic>{
-        'dngPath': '/test.dng',
-        'dngFileSize': 16000000,
-        'metadata': <dynamic, dynamic>{},
-        'previewPath': '/storage/emulated/0/Pictures/MiniTIAS/test.preview.jpg',
-        'previewFileSize': 204800,
-      };
-      final result = QuantitativeCaptureResult.fromMap(map);
-      expect(
-        result.previewPath,
-        '/storage/emulated/0/Pictures/MiniTIAS/test.preview.jpg',
-      );
-      expect(result.previewFileSize, 204800);
-      expect(result.previewFileSize, isA<int>());
-    });
-
-    test('previewPath が null の場合，previewPath は null になる', () {
-      final map = <dynamic, dynamic>{
-        'dngPath': '/test.dng',
-        'dngFileSize': 16000000,
-        'metadata': <dynamic, dynamic>{},
-        'previewPath': null,
-        'previewFileSize': null,
-      };
-      final result = QuantitativeCaptureResult.fromMap(map);
-      expect(result.previewPath, isNull);
-      expect(result.previewFileSize, isNull);
-    });
-
-    test(
-      'map に previewPath / previewFileSize キー自体が存在しない場合でも fromMap が成功し両フィールドが null になる',
-      () {
-        // 後方互換: プレビュー生成前の Kotlin が返す map にキーが存在しない場合
-        final map = <dynamic, dynamic>{
-          'dngPath': '/test.dng',
-          'dngFileSize': 16000000,
-          'metadata': <dynamic, dynamic>{},
-        };
-        final result = QuantitativeCaptureResult.fromMap(map);
-        expect(result.previewPath, isNull);
-        expect(result.previewFileSize, isNull);
-      },
-    );
-
-    test('previewFileSize が int 直接でも num 経由でも正しく int に変換される', () {
-      // int 直接のケース
-      final mapInt = <dynamic, dynamic>{
-        'dngPath': '/test.dng',
-        'dngFileSize': 100,
-        'metadata': <dynamic, dynamic>{},
-        'previewPath': '/test.preview.jpg',
-        'previewFileSize': 204800, // Dart int
-      };
-      final resultInt = QuantitativeCaptureResult.fromMap(mapInt);
-      expect(resultInt.previewFileSize, 204800);
-      expect(resultInt.previewFileSize, isA<int>());
-
-      // num (double) 経由のケース
-      final mapDouble = <dynamic, dynamic>{
-        'dngPath': '/test.dng',
-        'dngFileSize': 100,
-        'metadata': <dynamic, dynamic>{},
-        'previewPath': '/test.preview.jpg',
-        'previewFileSize': 204800.0, // double として渡される場合
-      };
-      final resultDouble = QuantitativeCaptureResult.fromMap(mapDouble);
-      expect(resultDouble.previewFileSize, 204800);
-      expect(resultDouble.previewFileSize, isA<int>());
-    });
   });
 }