diff --git a/LesionTracker/client/components/viewer.js b/LesionTracker/client/components/viewer.js
index 4eea55fbe..a833ed71e 100644
--- a/LesionTracker/client/components/viewer.js
+++ b/LesionTracker/client/components/viewer.js
@@ -318,7 +318,6 @@ Template.viewer.onRendered(function() {
         var viewports = $(".imageViewerViewport");
         var element =  viewports.get(activeViewportIndex);
         var enabledElement = cornerstone.getEnabledElement(element);
-        console.log(enabledElement);
         // Check value of rowPixelSpacing & columnPixelSpacing to define as unavailable
         if (!enabledElement || !enabledElement.image || !enabledElement.image.rowPixelSpacing || !enabledElement.image.columnPixelSpacing) {
             // Disable Lesion Buttons
diff --git a/Packages/cornerstone/client/cornerstoneMath.js b/Packages/cornerstone/client/cornerstoneMath.js
index ff087e519..464bcbd30 100644
--- a/Packages/cornerstone/client/cornerstoneMath.js
+++ b/Packages/cornerstone/client/cornerstoneMath.js
@@ -976,10 +976,95 @@ var cornerstoneMath = (function (cornerstoneMath) {
         return Math.sqrt(distanceToPointSquared(lineSegment, point));
     }
 
+    // Returns intersection points of two lines
+    function intersectLine(lineSegment1, lineSegment2) {
+        var intersectionPoint = {};
+
+        var x1 = lineSegment1.start.x, y1 = lineSegment1.start.y, x2 = lineSegment1.end.x, y2 = lineSegment1.end.y,
+            x3 = lineSegment2.start.x, y3 = lineSegment2.start.y, x4 = lineSegment2.end.x, y4 = lineSegment2.end.y;
+
+        var a1, a2, b1, b2, c1, c2; // Coefficients of line equations
+        var r1, r2, r3, r4; // Sign values
+
+        var denom, offset, num; //Intermediate values
+
+        // Compute a1, b1, c1, where line joining points 1 and 2 is "a1 x  +  b1 y  +  c1  =  0"
+        a1 = y2 - y1;
+        b1 = x1 - x2;
+        c1 = x2 * y1 - x1 * y2;
+
+        // Compute r3 and r4
+        r3 = a1 * x3 + b1 * y3 + c1;
+        r4 = a1 * x4 + b1 * y4 + c1;
+
+        /* Check signs of r3 and r4.  If both point 3 and point 4 lie on
+         * same side of line 1, the line segments do not intersect.
+         */
+
+        if (r3 !== 0 &&
+            r4 !== 0 &&
+            cornerstoneMath.sign(r3) === cornerstoneMath.sign(r4)) {
+            intersectionPoint.x = 0;
+            intersectionPoint.y = 0;
+            intersectionPoint.intersected = false;
+            return intersectionPoint;
+        }
+
+        /* Compute a2, b2, c2 */
+
+        a2 = y4 - y3;
+        b2 = x3 - x4;
+        c2 = x4 * y3 - x3 * y4;
+
+        /* Compute r1 and r2 */
+
+        r1 = a2 * x1 + b2 * y1 + c2;
+        r2 = a2 * x2 + b2 * y2 + c2;
+
+        /* Check signs of r1 and r2.  If both point 1 and point 2 lie
+         * on same side of second line segment, the line segments do
+         * not intersect.
+         */
+
+        if (r1 !== 0 &&
+            r2 !== 0 &&
+            cornerstoneMath.sign(r1) === cornerstoneMath.sign(r2)) {
+            intersectionPoint.x = 0;
+            intersectionPoint.y = 0;
+            intersectionPoint.intersected = false;
+            return intersectionPoint;
+        }
+
+        /* Line segments intersect: compute intersection point.
+         */
+
+        denom = (a1 * b2) - (a2 * b1);
+
+        offset = denom < 0 ? -denom / 2 : denom / 2;
+
+        /* The denom/2 is to get rounding instead of truncating.  It
+         * is added or subtracted to the numerator, depending upon the
+         * sign of the numerator.
+         */
+
+        num = (b1 * c2) - (b2 * c1);
+        var x = parseFloat(num / denom);
+
+        num = (a2 * c1) - (a1 * c2);
+        var y = parseFloat(num / denom);
+
+        intersectionPoint.x = x;
+        intersectionPoint.y = y;
+        intersectionPoint.intersected = true;
+
+        return intersectionPoint;
+    }
+
     // module exports
     cornerstoneMath.lineSegment =
     {
-        distanceToPoint : distanceToPoint
+        distanceToPoint : distanceToPoint,
+        intersectLine: intersectLine
     };
 
 
@@ -1012,9 +1097,15 @@ var cornerstoneMath = (function (cornerstoneMath) {
         return radians * radianToDegreesFactor;
     }
 
+    // Returns sign of number
+    function sign(x) {
+        return typeof x === 'number' ? x ? x < 0 ? -1 : 1 : x === x ? 0 : NaN : NaN;
+    }
+
     cornerstoneMath.clamp = clamp;
     cornerstoneMath.degToRad = degToRad;
     cornerstoneMath.radToDeg = radToDeg;
+    cornerstoneMath.sign = sign;
 
     return cornerstoneMath;
 }(cornerstoneMath)); 
@@ -1754,6 +1845,7 @@ var cornerstoneMath = (function (cornerstoneMath) {
 
         return (distance < maxDistance);
     }
+
     function distanceToPoint(rect, point)
     {
         var minDistance = 655535;
@@ -1767,10 +1859,109 @@ var cornerstoneMath = (function (cornerstoneMath) {
         return minDistance;
     }
 
+    // Returns rectangle points
+    function rectToPoints (rect) {
+        var rectPoints = {
+            top: rect.top,
+            left: rect.left,
+            right: rect.left + rect.width,
+            bottom: rect.top + rect.height
+        };
+
+        return rectPoints;
+    }
+
+    // Returns whether two rectangles are intersected
+    function doesIntersect (rect1, rect2) {
+        var intersectLeftRight;
+        var intersectTopBottom;
+
+        var rect1Points = rectToPoints(rect1);
+        var rect2Points = rectToPoints(rect2);
+
+        if (rect1.width >= 0) {
+            if (rect2.width >= 0)
+                intersectLeftRight = !((rect1Points.right <= rect2Points.left) || (rect2Points.right <= rect1Points.left));
+            else
+                intersectLeftRight = !((rect1Points.right <= rect2Points.right) || (rect2Points.left <= rect1Points.left));
+        } else {
+            if (rect2.width >= 0)
+                intersectLeftRight = !((rect1Points.left <= rect2Points.left) || (rect2Points.right <= rect1Points.right));
+            else
+                intersectLeftRight = !((rect1Points.left <= rect2Points.right) || (rect2Points.left <= rect1Points.right));
+        }
+
+        if (rect1.height >= 0) {
+            if (rect2.height >= 0)
+                intersectTopBottom = !((rect1Points.bottom <= rect2Points.top) || (rect2Points.bottom <= rect1Points.top));
+            else
+                intersectTopBottom = !((rect1Points.bottom <= rect2Points.bottom) || (rect2Points.top <= rect1Points.top));
+        } else {
+            if (rect2.height >= 0)
+                intersectTopBottom = !((rect1Points.top <= rect2Points.top) || (rect2Points.bottom <= rect1Points.bottom));
+            else
+                intersectTopBottom = !((rect1Points.top <= rect2Points.bottom) || (rect2Points.top <= rect1Points.bottom));
+        }
+
+        return intersectLeftRight && intersectTopBottom;
+    }
+
+    // Returns intersection points of two rectangles
+    function getIntersectionRect(rect1, rect2) {
+        var intersectPoints = {};
+
+        if (!doesIntersect(rect1, rect2)) {
+            return;
+        }
+
+        var rect1Points = rectToPoints(rect1);
+        var rect2Points = rectToPoints(rect2);
+
+        if (rect1.width >= 0) {
+            if (rect2.width >= 0) {
+                intersectPoints.left = Math.max(rect1Points.left, rect2Points.left);
+                intersectPoints.right = Math.min(rect1Points.right, rect2Points.right);
+            } else {
+                intersectPoints.left = Math.max(rect1Points.left, rect2Points.right);
+                intersectPoints.right = Math.min(rect1Points.right, rect2Points.left);
+            }
+        } else {
+            if (rect2.width >= 0) {
+                intersectPoints.left = Math.min(rect1Points.left, rect2Points.right);
+                intersectPoints.right = Math.max(rect1Points.right, rect2Points.left);
+            } else {
+                intersectPoints.left = Math.min(rect1Points.left, rect2Points.left);
+                intersectPoints.right = Math.max(rect1Points.right, rect2Points.right);
+            }
+        }
+
+        if (rect1.height >= 0) {
+            if (rect2.height >= 0) {
+                intersectPoints.top = Math.max(rect1Points.top, rect2Points.top);
+                intersectPoints.bottom = Math.min(rect1Points.bottom, rect2Points.bottom);
+            } else {
+                intersectPoints.top = Math.max(rect1Points.top, rect2Points.bottom);
+                intersectPoints.bottom = Math.min(rect1Points.bottom, rect2Points.top);
+            }
+        } else {
+            if (rect2.height >= 0) {
+                intersectPoints.top = Math.min(rect1Points.top, rect2Points.bottom);
+                intersectPoints.bottom = Math.max(rect1Points.bottom, rect2Points.top);
+            } else {
+                intersectPoints.top = Math.min(rect1Points.top, rect2Points.top);
+                intersectPoints.bottom = Math.max(rect1Points.bottom, rect2Points.bottom);
+            }
+        }
+
+        return intersectPoints;
+
+    }
+
     // module exports
     cornerstoneMath.rect =
     {
-        distanceToPoint : distanceToPoint
+        rectToLineSegments : distanceToPoint,
+        getIntersectionRect : getIntersectionRect
     };
 
 
diff --git a/Packages/lesiontracker/client/compatibility/lesionTool.js b/Packages/lesiontracker/client/compatibility/lesionTool.js
index e68513a24..6b44585c3 100644
--- a/Packages/lesiontracker/client/compatibility/lesionTool.js
+++ b/Packages/lesiontracker/client/compatibility/lesionTool.js
@@ -237,13 +237,35 @@
     // Move long-axis start point
     function perpendicularBothFixedLeft(eventData, data) {
 
-        var intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularStart, data.handles.perpendicularEnd);
+        var longLine = {
+            start: {
+                x: data.handles.start.x,
+                y: data.handles.start.y
+            },
+            end: {
+                x: data.handles.end.x,
+                y: data.handles. end.y
+            }
+        };
 
-        var distanceFromPerpendicularP1 = getDistance(data.handles.perpendicularStart, intersection);
-        var distanceFromPerpendicularP2 = getDistance(data.handles.perpendicularEnd, intersection);
+        var perpendicularLine = {
+            start: {
+                x: data.handles.perpendicularStart.x,
+                y: data.handles.perpendicularStart.y
+            },
+            end: {
+                x: data.handles.perpendicularEnd.x,
+                y: data.handles. perpendicularEnd.y
+            }
+        };
 
-        var distanceToLineP2 = getDistance(data.handles.end, intersection);
-        var newLineLength = getDistance(data.handles.end, eventData.currentPoints.image);
+        var intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
+
+        var distanceFromPerpendicularP1 = cornerstoneMath.point.distance(data.handles.perpendicularStart, intersection);
+        var distanceFromPerpendicularP2 = cornerstoneMath.point.distance(data.handles.perpendicularEnd, intersection);
+
+        var distanceToLineP2 = cornerstoneMath.point.distance(data.handles.end, intersection);
+        var newLineLength = cornerstoneMath.point.distance(data.handles.end, eventData.currentPoints.image);
 
         if (newLineLength <= distanceToLineP2) {
             return false;
@@ -272,13 +294,35 @@
     // Move long-axis end point
     function perpendicularBothFixedRight(eventData, data) {
 
-        var intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularStart, data.handles.perpendicularEnd);
+        var longLine = {
+            start: {
+                x: data.handles.start.x,
+                y: data.handles.start.y
+            },
+            end: {
+                x: data.handles.end.x,
+                y: data.handles. end.y
+            }
+        };
 
-        var distanceFromPerpendicularP1 = getDistance(data.handles.perpendicularStart, intersection);
-        var distanceFromPerpendicularP2 = getDistance(data.handles.perpendicularEnd, intersection);
+        var perpendicularLine = {
+            start: {
+                x: data.handles.perpendicularStart.x,
+                y: data.handles.perpendicularStart.y
+            },
+            end: {
+                x: data.handles.perpendicularEnd.x,
+                y: data.handles. perpendicularEnd.y
+            }
+        };
 
-        var distanceToLineP2 = getDistance(data.handles.start, intersection);
-        var newLineLength = getDistance(data.handles.start, eventData.currentPoints.image);
+        var intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
+
+        var distanceFromPerpendicularP1 = cornerstoneMath.point.distance(data.handles.perpendicularStart, intersection);
+        var distanceFromPerpendicularP2 = cornerstoneMath.point.distance(data.handles.perpendicularEnd, intersection);
+
+        var distanceToLineP2 = cornerstoneMath.point.distance(data.handles.start, intersection);
+        var newLineLength = cornerstoneMath.point.distance(data.handles.start, eventData.currentPoints.image);
 
         if (newLineLength <= distanceToLineP2) {
             return false;
@@ -311,12 +355,11 @@
         var fixedPoint = data.handles.perpendicularEnd;
         var movedPoint = eventData.currentPoints.image;
 
-        var nearestFromFixed = getDistanceFromPointToLine(fixedPoint, data.handles.start, data.handles.end);
-        var distanceFromFixed = nearestFromFixed.distance;
-        var nearestFromMoved = getDistanceFromPointToLine(movedPoint, data.handles.start, data.handles.end);
-        var distanceFromMoved = nearestFromMoved.distance;
 
-        var distanceBetweenPoints = getDistance(fixedPoint, movedPoint);
+        var distanceFromFixed = cornerstoneMath.lineSegment.distanceToPoint(data.handles, fixedPoint);
+        var distanceFromMoved = cornerstoneMath.lineSegment.distanceToPoint(data.handles, movedPoint);
+
+        var distanceBetweenPoints = cornerstoneMath.point.distance(fixedPoint, movedPoint);
 
         var total = distanceFromFixed + distanceFromMoved;
 
@@ -324,7 +367,7 @@
             return false;
         }
 
-        var length = getDistance(data.handles.start, data.handles.end);
+        var length = cornerstoneMath.point.distance(data.handles.start, data.handles.end);
         var dx = (data.handles.start.x - data.handles.end.x) / length;
         var dy = (data.handles.start.y - data.handles.end.y) / length;
 
@@ -342,9 +385,31 @@
         data.handles.perpendicularEnd.x = movedPoint.x - total * dy;
         data.handles.perpendicularEnd.y = movedPoint.y + total * dx;
 
-        var intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularStart, data.handles.perpendicularEnd);
+        var longLine = {
+            start: {
+                x: data.handles.start.x,
+                y: data.handles.start.y
+            },
+            end: {
+                x: data.handles.end.x,
+                y: data.handles.end.y
+            }
+        };
+
+        var perpendicularLine = {
+            start: {
+                x: data.handles.perpendicularStart.x,
+                y: data.handles.perpendicularStart.y
+            },
+            end: {
+                x: data.handles.perpendicularEnd.x,
+                y: data.handles.perpendicularEnd.y
+            }
+        };
+
+        var intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
         if (!intersection.intersected) {
-            if (getDistance(movedPoint, data.handles.start) > getDistance(movedPoint, data.handles.end)) {
+            if (cornerstoneMath.point.distance(movedPoint, data.handles.start) > cornerstoneMath.point.distance(movedPoint, data.handles.end)) {
                 data.handles.perpendicularStart.x = adjustedLineP2.x + distanceFromMoved * dy;
                 data.handles.perpendicularStart.y = adjustedLineP2.y - distanceFromMoved * dx;
                 data.handles.perpendicularEnd.x = data.handles.perpendicularStart.x - total * dy;
@@ -373,12 +438,10 @@
         var fixedPoint = data.handles.perpendicularStart;
         var movedPoint = eventData.currentPoints.image;
 
-        var nearestFromFixed = getDistanceFromPointToLine(fixedPoint, data.handles.start, data.handles.end);
-        var distanceFromFixed = nearestFromFixed.distance;
-        var nearestFromMoved = getDistanceFromPointToLine(movedPoint, data.handles.start, data.handles.end);
-        var distanceFromMoved = nearestFromMoved.distance;
+        var distanceFromFixed = cornerstoneMath.lineSegment.distanceToPoint(data.handles, fixedPoint);
+        var distanceFromMoved = cornerstoneMath.lineSegment.distanceToPoint(data.handles, movedPoint);
 
-        var distanceBetweenPoints = getDistance(fixedPoint, movedPoint);
+        var distanceBetweenPoints = cornerstoneMath.point.distance(fixedPoint, movedPoint);
 
         var total = distanceFromFixed + distanceFromMoved;
 
@@ -386,7 +449,7 @@
             return false;
         }
 
-        var length = getDistance(data.handles.start, data.handles.end);
+        var length = cornerstoneMath.point.distance(data.handles.start, data.handles.end);
         var dx = (data.handles.start.x - data.handles.end.x) / length;
         var dy = (data.handles.start.y - data.handles.end.y) / length;
 
@@ -404,9 +467,31 @@
         data.handles.perpendicularEnd.x = movedPoint.x;
         data.handles.perpendicularEnd.y = movedPoint.y;
 
-        var intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularStart, data.handles.perpendicularEnd);
+        var longLine = {
+            start: {
+                x: data.handles.start.x,
+                y: data.handles.start.y
+            },
+            end: {
+                x: data.handles.end.x,
+                y: data.handles.end.y
+            }
+        };
+
+        var perpendicularLine = {
+            start: {
+                x: data.handles.perpendicularStart.x,
+                y: data.handles.perpendicularStart.y
+            },
+            end: {
+                x: data.handles.perpendicularEnd.x,
+                y: data.handles.perpendicularEnd.y
+            }
+        };
+
+        var intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
         if (!intersection.intersected) {
-            if (getDistance(movedPoint, data.handles.start) > getDistance(movedPoint, data.handles.end)) {
+            if (cornerstoneMath.point.distance(movedPoint, data.handles.start) > cornerstoneMath.point.distance(movedPoint, data.handles.end)) {
                 data.handles.perpendicularEnd.x = adjustedLineP2.x - distanceFromMoved * dy;
                 data.handles.perpendicularEnd.y = adjustedLineP2.y + distanceFromMoved * dx;
                 data.handles.perpendicularStart.x = data.handles.perpendicularEnd.x + total * dy;
@@ -438,6 +523,8 @@
             d1,
             d2;
 
+        var longLine = {},
+            perpendicularLine = {};
 
         if (handle.index === 0) {
             // if long-axis start point is moved
@@ -464,13 +551,20 @@
         } else if (handle.index === 2) {
             outOfBounds = false;
             // if perpendicular start point is moved
+            longLine.start =  {x: data.handles.start.x, y: data.handles.start.y};
+            longLine.end = {x: data.handles.end.x, y: data.handles.end.y};
 
-            intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularEnd, eventData.currentPoints.image);
+            perpendicularLine.start = {x: data.handles.perpendicularEnd.x, y: data.handles.perpendicularEnd.y};
+            perpendicularLine.end = {x: eventData.currentPoints.image.x, y: eventData.currentPoints.image.y};
+
+            intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
             if (!intersection.intersected) {
-                intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularEnd, data.handles.perpendicularStart);
+                perpendicularLine.end = {x: data.handles.perpendicularStart.x, y: data.handles.perpendicularStart.y};
 
-                d1 = getDistance(intersection, data.handles.start);
-                d2 = getDistance(intersection, data.handles.end);
+                intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
+
+                d1 = cornerstoneMath.point.distance(intersection, data.handles.start);
+                d2 = cornerstoneMath.point.distance(intersection, data.handles.end);
 
                 if (!intersection.intersected || d1 < 3 || d2 < 3) {
                     outOfBounds = true;
@@ -490,14 +584,22 @@
 
         } else if (handle.index === 3) {
             outOfBounds = false;
+
             // if perpendicular end point is moved
+            longLine.start =  {x: data.handles.start.x, y: data.handles.start.y};
+            longLine.end = {x: data.handles.end.x, y: data.handles.end.y};
 
-            intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularStart, eventData.currentPoints.image);
+            perpendicularLine.start = {x: data.handles.perpendicularStart.x, y: data.handles.perpendicularStart.y};
+            perpendicularLine.end = {x: eventData.currentPoints.image.x, y: eventData.currentPoints.image.y};
+
+            intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
             if (!intersection.intersected) {
-                intersection = getLineIntersection(data.handles.start, data.handles.end, data.handles.perpendicularEnd, data.handles.perpendicularStart);
+                perpendicularLine.end = {x: data.handles.perpendicularEnd.x, y: data.handles.perpendicularEnd.y};
 
-                d1 = getDistance(intersection, data.handles.start);
-                d2 = getDistance(intersection, data.handles.end);
+                intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
+
+                d1 = cornerstoneMath.point.distance(intersection, data.handles.start);
+                d2 = cornerstoneMath.point.distance(intersection, data.handles.end);
 
                 if (!intersection.intersected || d1 < 3 || d2 < 3) {
                     outOfBounds = true;
@@ -742,14 +844,14 @@
         var minDistance;
 
         // Find distances between handles and textBox
-        var distanceToStart = getDistance(data.handles.start, data.handles.textBox);
+        var distanceToStart = cornerstoneMath.point.distance(data.handles.start, data.handles.textBox);
         distancesArr.push({
             distance: distanceToStart,
             point: data.handles.start
         });
         minDistance = distanceToStart;
 
-        var distanceToEnd = getDistance(data.handles.end, data.handles.textBox);
+        var distanceToEnd = cornerstoneMath.point.distance(data.handles.end, data.handles.textBox);
         distancesArr.push({
             distance: distanceToEnd,
             point: data.handles.end
@@ -758,7 +860,7 @@
         minDistance = Math.min(distanceToEnd, minDistance);
 
         if (data.handles.perpendicularStart.x && data.handles.perpendicularStart.y) {
-            var distanceToPerpendicularStart = getDistance(data.handles.perpendicularStart, data.handles.textBox);
+            var distanceToPerpendicularStart = cornerstoneMath.point.distance(data.handles.perpendicularStart, data.handles.textBox);
             distancesArr.push({
                 distance: distanceToPerpendicularStart,
                 point: data.handles.perpendicularStart
@@ -769,7 +871,7 @@
         }
 
         if (data.handles.perpendicularEnd.x && data.handles.perpendicularEnd.y) {
-            var distanceToPerpendicularEnd = getDistance(data.handles.perpendicularEnd, data.handles.textBox);
+            var distanceToPerpendicularEnd = cornerstoneMath.point.distance(data.handles.perpendicularEnd, data.handles.textBox);
             distancesArr.push({
                 distance: distanceToPerpendicularEnd,
                 point: data.handles.perpendicularEnd
@@ -860,6 +962,9 @@
             var wx = (data.handles.perpendicularStart.x - data.handles.perpendicularEnd.x) * (eventData.image.columnPixelSpacing || 1);
             var wy = (data.handles.perpendicularStart.y - data.handles.perpendicularEnd.y) * (eventData.image.rowPixelSpacing || 1);
             var width = Math.sqrt(wx * wx + wy * wy);
+            if (!width) {
+               width = 0;
+            }
 
             // Draw the textbox
             var suffix = ' mm';
diff --git a/Packages/lesiontracker/client/compatibility/scaleOverlayTool.js b/Packages/lesiontracker/client/compatibility/scaleOverlayTool.js
index ed780d60b..7b9811d0d 100644
--- a/Packages/lesiontracker/client/compatibility/scaleOverlayTool.js
+++ b/Packages/lesiontracker/client/compatibility/scaleOverlayTool.js
@@ -113,98 +113,12 @@
 
     }
 
-    function doesIntersect(canvasBounds, imageBounds) {
-        var intersectLeftRight;
-        var intersectTopBottom;
-
-        if (canvasBounds.width >= 0) {
-            if (imageBounds.width >= 0)
-              intersectLeftRight = !((canvasBounds.right <= imageBounds.left) || (imageBounds.right <= canvasBounds.left));
-            else
-              intersectLeftRight = !((canvasBounds.right <= imageBounds.right) || (imageBounds.left <= canvasBounds.left));
-        } else {
-            if (imageBounds.width >= 0)
-              intersectLeftRight = !((canvasBounds.left <= imageBounds.left) || (imageBounds.right <= canvasBounds.right));
-            else
-              intersectLeftRight = !((canvasBounds.left <= imageBounds.right) || (imageBounds.left <= canvasBounds.right));
-        }
-
-        if (canvasBounds.height >= 0) {
-            if (imageBounds.height >= 0)
-              intersectTopBottom = !((canvasBounds.bottom <= imageBounds.top) || (imageBounds.bottom <= canvasBounds.top));
-            else
-              intersectTopBottom = !((canvasBounds.bottom <= imageBounds.bottom) || (imageBounds.top <= canvasBounds.top));
-        } else {
-            if (imageBounds.height >= 0)
-              intersectTopBottom = !((canvasBounds.top <= imageBounds.top) || (imageBounds.bottom <= canvasBounds.bottom));
-            else
-              intersectTopBottom = !((canvasBounds.top <= imageBounds.bottom) || (imageBounds.top <= canvasBounds.bottom));
-        }
-
-        return intersectLeftRight && intersectTopBottom;
-    }
-
-    function getIntersectionRectangle(canvasBounds, imageBounds) {
-        var intersectPoints = {
-            left: 0,
-            top: 0,
-            right: 0,
-            bottom: 0
-        };
-
-        if (!doesIntersect(canvasBounds, imageBounds)) {
-            return intersectPoints;
-
-        }
-
-        if (canvasBounds.width >= 0) {
-            if (imageBounds.width >= 0) {
-                intersectPoints.left = Math.max(canvasBounds.left, imageBounds.left);
-                intersectPoints.right = Math.min(canvasBounds.right, imageBounds.right);
-            } else {
-                intersectPoints.left = Math.max(canvasBounds.left, imageBounds.right);
-                intersectPoints.right = Math.min(canvasBounds.right, imageBounds.left);
-            }
-        } else {
-            if (imageBounds.width >= 0) {
-                intersectPoints.left = Math.min(canvasBounds.left, imageBounds.right);
-                intersectPoints.right = Math.max(canvasBounds.right, imageBounds.left);
-            } else {
-                intersectPoints.left = Math.min(canvasBounds.left, imageBounds.left);
-                intersectPoints.right = Math.max(canvasBounds.right, imageBounds.right);
-            }
-        }
-
-        if (canvasBounds.height >= 0) {
-            if (imageBounds.height >= 0) {
-                intersectPoints.top = Math.max(canvasBounds.top, imageBounds.top);
-                intersectPoints.bottom = Math.min(canvasBounds.bottom, imageBounds.bottom);
-            } else {
-                intersectPoints.top = Math.max(canvasBounds.top, imageBounds.bottom);
-                intersectPoints.bottom = Math.min(canvasBounds.bottom, imageBounds.top);
-            }
-        } else {
-            if (imageBounds.height >= 0) {
-                intersectPoints.top = Math.min(canvasBounds.top, imageBounds.bottom);
-                intersectPoints.bottom = Math.max(canvasBounds.bottom, imageBounds.top);
-            } else {
-                intersectPoints.top = Math.min(canvasBounds.top, imageBounds.top);
-                intersectPoints.bottom = Math.max(canvasBounds.bottom, imageBounds.bottom);
-            }
-        }
-
-        return intersectPoints;
-
-    }
-
     // Computes the max bound for scales on the image
     function computeScaleBounds(eventData, canvasSize, imageSize, horizontalReduction, verticalReduction) {
 
         var canvasBounds = {
             left: 0,
             top: 0,
-            right: canvasSize.width,
-            bottom: canvasSize.height,
             width: canvasSize.width,
             height: canvasSize.height
         };
@@ -214,8 +128,6 @@
         canvasBounds = {
             left: canvasBounds.left + hReduction,
             top: canvasBounds.top + vReduction,
-            right: (canvasBounds.left + hReduction) + (canvasBounds.width - 2 * hReduction),
-            bottom: (canvasBounds.top + vReduction) + (canvasBounds.height - 2 * vReduction),
             width: canvasBounds.width - 2 * hReduction,
             height: canvasBounds.height - 2 * vReduction
         };
@@ -245,14 +157,11 @@
         var imageBounds = {
             left: startPointCanvasImageBounds.x + hReduction,
             top: startPointCanvasImageBounds.y + vReduction,
-            right: (startPointCanvasImageBounds.x + hReduction) + (imageBoundsWidth - 2 * hReduction),
-            bottom: (startPointCanvasImageBounds.y + vReduction) + (imageBoundsHeight - 2 * vReduction),
             width: imageBoundsWidth - 2 * hReduction,
             height: imageBoundsHeight - 2 * vReduction
-
         };
 
-        return getIntersectionRectangle(canvasBounds, imageBounds);
+        return cornerstoneMath.rect.getIntersectionRect(canvasBounds, imageBounds);
 
     }
 
@@ -281,17 +190,15 @@
         var verticalIntervalScale = (10.0 / eventData.enabledElement.image.rowPixelSpacing) * eventData.viewport.scale;
         var horizontalIntervalScale = (10.0 / eventData.enabledElement.image.rowPixelSpacing) * eventData.viewport.scale;
 
-        if (!canvasSize.width || !canvasSize.height || !imageSize.width || !imageSize.height ) {
-            return false;
-        }
-
         // 0.1 and 0.05 gives margin to horizontal and vertical lines
         var hscaleBounds = computeScaleBounds(eventData, canvasSize, imageSize, 0.1, 0.05);
         var vscaleBounds = computeScaleBounds(eventData, canvasSize, imageSize, 0.05, 0.1);
 
+        if (!canvasSize.width || !canvasSize.height || !imageSize.width || !imageSize.height || !hscaleBounds || !vscaleBounds) {
+            return;
+        }
+
         var config = {
-            width: imageSize.width,
-            height: imageSize.height,
             hscaleBounds: hscaleBounds,
             vscaleBounds: vscaleBounds,
             verticalMinorTick: verticalIntervalScale,
diff --git a/Packages/lesiontracker/package.js b/Packages/lesiontracker/package.js
index 7ab698516..5bafd81d9 100644
--- a/Packages/lesiontracker/package.js
+++ b/Packages/lesiontracker/package.js
@@ -99,7 +99,6 @@ Package.onUse(function(api) {
     api.addFiles('lib/activateLesion.js', 'client');
     api.addFiles('lib/deactivateAllToolData.js', 'client');
     api.addFiles('lib/clearTools.js', 'client');
-    api.addFiles('lib/mathUtils.js', 'client');
 
     // Export gloabal functions
     api.export('activateLesion','client');
@@ -112,12 +111,6 @@ Package.onUse(function(api) {
     api.export('clearTools', 'client');
     api.export('LesionManager', 'client');
 
-    // Export mathUtils functions
-    api.export('sign','client');
-    api.export('getLineIntersection','client');
-    api.export('getDistance','client');
-    api.export('getDistanceFromPointToLine','client');
-
     // Export client-side collections
     api.export('LesionLocations', 'client');
     api.export('LocationResponses', 'client');
diff --git a/Packages/worklist/components/worklistResult/worklistResult.js b/Packages/worklist/components/worklistResult/worklistResult.js
index c9dffda46..476ce2e9e 100644
--- a/Packages/worklist/components/worklistResult/worklistResult.js
+++ b/Packages/worklist/components/worklistResult/worklistResult.js
@@ -127,3 +127,4 @@ Template.worklistResult.events({
         search();
     }
 });
+