diff --git a/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/nodes/SemanticNode.java b/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/nodes/SemanticNode.java
index 988fc37f..3e18869b 100644
--- a/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/nodes/SemanticNode.java
+++ b/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/nodes/SemanticNode.java
@@ -465,7 +465,7 @@ public interface SemanticNode {
     private Map<Page, Rectangle2D> getBBoxFromLeafTextBlock(Map<Page, Rectangle2D> bBoxPerPage) {
 
         Map<Page, List<AtomicTextBlock>> atomicTextBlockPerPage = getTextBlock().getAtomicTextBlocks().stream().collect(Collectors.groupingBy(AtomicTextBlock::getPage));
-        atomicTextBlockPerPage.forEach((page, atbs) -> bBoxPerPage.put(page, RectangleTransformations.bBoxUnionAtomicTextBlock(atbs)));
+        atomicTextBlockPerPage.forEach((page, atbs) -> bBoxPerPage.put(page, RectangleTransformations.atomicTextBlockBBox(atbs)));
         return bBoxPerPage;
     }
 
diff --git a/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/textblock/AtomicTextBlock.java b/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/textblock/AtomicTextBlock.java
index 1926192f..7a7376ec 100644
--- a/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/textblock/AtomicTextBlock.java
+++ b/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/graph/textblock/AtomicTextBlock.java
@@ -191,7 +191,7 @@ public class AtomicTextBlock implements TextBlock {
         List<Rectangle2D> rectanglesPerLine = stringBoundary.split(getAllLineBreaksInBoundary(stringBoundary))
                 .stream()
                 .map(this::getPositions)
-                .map(RectangleTransformations::rectangleUnionWithGaps)
+                .map(RectangleTransformations::rectangleBBoxWithGaps)
                 .flatMap(Collection::stream)
                 .toList();
         Map<Page, List<Rectangle2D>> rectanglePerLinePerPage = new HashMap<>();
diff --git a/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/utils/RectangleTransformations.java b/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/utils/RectangleTransformations.java
index 9aa2d2f0..fdc3639f 100644
--- a/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/utils/RectangleTransformations.java
+++ b/redaction-service-v1/redaction-service-server-v1/src/main/java/com/iqser/red/service/redaction/v1/server/layoutparsing/document/utils/RectangleTransformations.java
@@ -1,6 +1,5 @@
 package com.iqser.red.service.redaction.v1.server.layoutparsing.document.utils;
 
-import java.awt.geom.Area;
 import java.awt.geom.Rectangle2D;
 import java.awt.geom.RectangularShape;
 import java.util.Collections;
@@ -19,11 +18,14 @@ import com.iqser.red.service.persistence.service.v1.api.shared.model.redactionlo
 import com.iqser.red.service.persistence.service.v1.api.shared.model.redactionlog.Rectangle;
 import com.iqser.red.service.redaction.v1.server.layoutparsing.document.graph.textblock.AtomicTextBlock;
 
+import lombok.AllArgsConstructor;
+import lombok.NoArgsConstructor;
+
 public class RectangleTransformations {
 
-    public static PDRectangle toPDRectangleUnion(List<Rectangle> rectangles) {
+    public static PDRectangle toPDRectangleBBox(List<Rectangle> rectangles) {
 
-        Rectangle2D rectangle2D = RectangleTransformations.bBoxUnionRectangle(rectangles);
+        Rectangle2D rectangle2D = RectangleTransformations.rectangleBBox(rectangles);
 
         PDRectangle annotationPosition = new PDRectangle();
         annotationPosition.setLowerLeftX((float) rectangle2D.getMinX());
@@ -34,15 +36,15 @@ public class RectangleTransformations {
     }
 
 
-    public static Rectangle2D bBoxUnionAtomicTextBlock(List<AtomicTextBlock> atomicTextBlocks) {
+    public static Rectangle2D atomicTextBlockBBox(List<AtomicTextBlock> atomicTextBlocks) {
 
-        return atomicTextBlocks.stream().flatMap(atomicTextBlock -> atomicTextBlock.getPositions().stream()).collect(new Rectangle2DUnion());
+        return atomicTextBlocks.stream().flatMap(atomicTextBlock -> atomicTextBlock.getPositions().stream()).collect(new Rectangle2DBBoxCollector());
     }
 
 
-    public static Rectangle2D bBoxUnionRectangle(List<Rectangle> rectangles) {
+    public static Rectangle2D rectangleBBox(List<Rectangle> rectangles) {
 
-        return rectangles.stream().map(RectangleTransformations::toRectangle2D).collect(new Rectangle2DUnion());
+        return rectangles.stream().map(RectangleTransformations::toRectangle2D).collect(new Rectangle2DBBoxCollector());
     }
 
 
@@ -64,9 +66,9 @@ public class RectangleTransformations {
     }
 
 
-    public static Rectangle2D rectangleUnion(List<Rectangle2D> rectangle2DList) {
+    public static Rectangle2D rectangle2DBBox(List<Rectangle2D> rectangle2DList) {
 
-        return rectangle2DList.stream().collect(new Rectangle2DUnion());
+        return rectangle2DList.stream().collect(new Rectangle2DBBoxCollector());
     }
 
 
@@ -76,7 +78,7 @@ public class RectangleTransformations {
      * @param rectangle2DList A list of rectangles to combine
      * @return A list of rectangles which are combined if they are closer than the split threshold
      */
-    public static List<Rectangle2D> rectangleUnionWithGaps(List<Rectangle2D> rectangle2DList) {
+    public static List<Rectangle2D> rectangleBBoxWithGaps(List<Rectangle2D> rectangle2DList) {
 
         if (rectangle2DList.isEmpty()) {
             return Collections.emptyList();
@@ -98,47 +100,85 @@ public class RectangleTransformations {
                 previousRectangle = currentRectangle;
             }
         }
-        return rectangleListsWithGaps.stream().map(RectangleTransformations::rectangleUnion).toList();
+        return rectangleListsWithGaps.stream().map(RectangleTransformations::rectangle2DBBox).toList();
     }
 
 
-    private static class Rectangle2DUnion implements Collector<Rectangle2D, Area, Rectangle2D> {
+    private static class Rectangle2DBBoxCollector implements Collector<Rectangle2D, Rectangle2DBBoxCollector.BBox, Rectangle2D> {
 
         @Override
-        public Supplier<Area> supplier() {
+        public Supplier<BBox> supplier() {
 
-            return Area::new;
+            return BBox::new;
         }
 
 
         @Override
-        public BiConsumer<Area, Rectangle2D> accumulator() {
+        public BiConsumer<BBox, Rectangle2D> accumulator() {
 
-            return (area, rectangle2D) -> area.add(new Area(rectangle2D));
+            return (bb, rect) -> bb.addRectangle(rect.getMinX(), rect.getMinY(), rect.getMaxX(), rect.getMaxY());
         }
 
 
         @Override
-        public BinaryOperator<Area> combiner() {
+        public BinaryOperator<BBox> combiner() {
 
-            return (area1, area2) -> {
-                area1.add(area2);
-                return area1;
-            };
+            return (b1, b2) -> new BBox(Math.min(b1.lowerLeftX, b2.lowerLeftX),
+                    Math.min(b1.lowerLeftY, b2.lowerLeftY),
+                    Math.max(b1.upperRightX, b2.upperRightX),
+                    Math.max(b1.upperRightY, b2.upperRightY));
         }
 
 
         @Override
-        public Function<Area, Rectangle2D> finisher() {
+        public Function<BBox, Rectangle2D> finisher() {
 
-            return Area::getBounds2D;
+            return bb -> new Rectangle2D.Double(bb.lowerLeftX, bb.lowerLeftY, bb.upperRightX - bb.lowerLeftX, bb.upperRightY - bb.lowerLeftY);
         }
 
 
         @Override
         public Set<Characteristics> characteristics() {
 
-            return Set.of(Characteristics.CONCURRENT, Characteristics.UNORDERED);
+            return Set.of(Characteristics.UNORDERED);
+        }
+
+
+        @AllArgsConstructor
+        @NoArgsConstructor
+        private static class BBox {
+
+            Double lowerLeftX;
+            Double lowerLeftY;
+            Double upperRightX;
+            Double upperRightY;
+
+
+            public void addRectangle(double lowerLeftX, double lowerLeftY, double upperRightX, double upperRightY) {
+
+                if (this.lowerLeftX == null) {
+                    this.lowerLeftX = lowerLeftX;
+                } else if (this.lowerLeftX > lowerLeftX) {
+                    this.lowerLeftX = lowerLeftX;
+                }
+                if (this.lowerLeftY == null) {
+                    this.lowerLeftY = lowerLeftY;
+                } else if (this.lowerLeftY > lowerLeftY) {
+                    this.lowerLeftY = lowerLeftY;
+                }
+                if (this.upperRightX == null) {
+                    this.upperRightX = upperRightX;
+                } else if (this.upperRightX < upperRightX) {
+                    this.upperRightX = upperRightX;
+                }
+                if (this.upperRightY == null) {
+                    this.upperRightY = upperRightY;
+                } else if (this.upperRightY < upperRightY) {
+                    this.upperRightY = upperRightY;
+                }
+
+            }
+
         }
 
     }
diff --git a/redaction-service-v1/redaction-service-server-v1/src/test/java/com/iqser/red/service/redaction/v1/server/annotate/AnnotationService.java b/redaction-service-v1/redaction-service-server-v1/src/test/java/com/iqser/red/service/redaction/v1/server/annotate/AnnotationService.java
index 046fec99..0fbc010b 100644
--- a/redaction-service-v1/redaction-service-server-v1/src/test/java/com/iqser/red/service/redaction/v1/server/annotate/AnnotationService.java
+++ b/redaction-service-v1/redaction-service-server-v1/src/test/java/com/iqser/red/service/redaction/v1/server/annotate/AnnotationService.java
@@ -1,6 +1,6 @@
 package com.iqser.red.service.redaction.v1.server.annotate;
 
-import static com.iqser.red.service.redaction.v1.server.layoutparsing.document.utils.RectangleTransformations.toPDRectangleUnion;
+import static com.iqser.red.service.redaction.v1.server.layoutparsing.document.utils.RectangleTransformations.toPDRectangleBBox;
 
 import java.awt.Color;
 import java.awt.geom.Rectangle2D;
@@ -136,7 +136,7 @@ public class AnnotationService {
 
         PDAnnotationTextMarkup annotation = new PDAnnotationTextMarkup(PDAnnotationTextMarkup.SUB_TYPE_HIGHLIGHT);
         annotation.constructAppearances();
-        PDRectangle pdRectangle = toPDRectangleUnion(rectangles);
+        PDRectangle pdRectangle = toPDRectangleBBox(rectangles);
         annotation.setRectangle(pdRectangle);
         annotation.setQuadPoints(Floats.toArray(toQuadPoints(rectangles)));
         if (!redactionLogEntry.isHint()) {