diff --git a/examples/test-cases.ipynb b/examples/test-cases.ipynb
index b54c123..c8d4cc4 100644
--- a/examples/test-cases.ipynb
+++ b/examples/test-cases.ipynb
@@ -612,12 +612,14 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Segmentation Cases"
+    "## Segmentation Cases\n",
+    "\n",
+    "Each example that is illustrated here is also implemented in 3d."
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 74,
+   "execution_count": null,
    "metadata": {
     "nbsphinx": "hidden"
    },
@@ -643,7 +645,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 75,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -663,7 +665,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 76,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -683,7 +685,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 77,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -703,7 +705,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 78,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -723,7 +725,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 79,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -743,7 +745,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 80,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -763,7 +765,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 81,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {