diff --git a/image_markuper/dicom/models/__init__.py b/image_markuper/dicom/models/__init__.py
index 3a5359c..94d67e1 100644
--- a/image_markuper/dicom/models/__init__.py
+++ b/image_markuper/dicom/models/__init__.py
@@ -1,3 +1,3 @@
 # flake8: noqa
-from .base import Dicom, Project
+from .base import Dicom, Layer, Project
 from .shapes import BaseShape, Circle, Coordinate, FreeHand, Roi, Ruler
diff --git a/image_markuper/dicom/models/base.py b/image_markuper/dicom/models/base.py
index d06e038..4a7b483 100644
--- a/image_markuper/dicom/models/base.py
+++ b/image_markuper/dicom/models/base.py
@@ -7,6 +7,51 @@ User = get_user_model()
 
 
 class Project(models.Model):
+    class PathologyType(models.IntegerChoices):
+        no_pathology = 0, "Без патологий"
+        covid_pathology_all = 1, "COVID-19; все доли; многочисленные; размер любой"
+        covid_pathology_lung = (
+            2,
+            "COVID-19; Нижняя доля правого лёгкого, Нижняя доля левого лёгкого",
+        )
+        few = 3, "Немногочисленные; 10-20 мм"
+        lung_cancer_lower_right = (
+            4,
+            "Рак лёгкого; Нижняя доля правого лёгкого, Единичное; 10-20 мм",
+        )
+        lung_cancer_middle_right = (
+            5,
+            "Рак лёгкого; Средняя доля правого лёгкого, Единичное; >20 мм",
+        )
+        lung_cancer_lower_left = (
+            6,
+            "Рак лёгкого; Нижняя доля левого лёгкого, Единичное; 10-20 мм",
+        )
+        lung_cancer_upper_right = (
+            7,
+            "Рак лёгкого; Верхняя доля правого лёгкого, Единичное; 5-10 мм",
+        )
+        lung_cancer_upper_left = (
+            8,
+            "Рак лёгкого; Верхняя доля левого лёгкого, Единичное; 5-10 мм",
+        )
+        lung_cancer_all_many_small = (
+            9,
+            "Метастатическое поражение лёгких; Все доли; Многочисленные; 5-10 мм",
+        )
+        lung_cancer_all_many_big = (
+            10,
+            "Метастатическое поражение лёгких; Все доли; Многочисленные; 10-20 мм",
+        )
+        lung_cancer_all_few_small = (
+            11,
+            "Метастатическое поражение лёгких; Все доли; Немногочисленные; 5-10 мм",
+        )
+
+    name = models.CharField(max_length=200)
+
+    pathology_type = models.IntegerField(choices=PathologyType.choices, default=0)
+
     user = models.ForeignKey(User, related_name="projects", on_delete=models.CASCADE)
     slug = models.SlugField(max_length=10)
     stl = models.FileField(blank=True)
@@ -18,17 +63,11 @@ class Project(models.Model):
 
 
 class Dicom(models.Model):
-    class PathologyType(models.IntegerChoices):
-        no_pathology = 0, "Без патологий"
-        covid_pathology = 1, "Covid"
-
-    user = models.ForeignKey(User, related_name="files", on_delete=models.CASCADE)
     slug = models.SlugField()
 
     file = models.FileField(upload_to=media_upload_path)
     uploaded = models.DateTimeField(auto_now_add=True)
 
-    pathology_type = models.IntegerField(choices=PathologyType.choices, default=0)
     project = models.ForeignKey(
         Project, related_name="files", null=True, on_delete=models.SET_NULL
     )
@@ -38,3 +77,15 @@ class Dicom(models.Model):
 
     def get_absolute_url(self):
         return reverse("get_update_delete_dicom", kwargs={"slug": self.slug})
+
+
+class Layer(models.Model):
+    parent = models.ForeignKey(
+        "self", related_name="children", blank=True, null=True, on_delete=models.CASCADE
+    )
+    dicom = models.ForeignKey(Dicom, related_name="layers", on_delete=models.CASCADE)
+    name = models.CharField(max_length=200)
+    slug = models.SlugField(max_length=8)
+
+    def __str__(self):
+        return f"layer on {self.dicom}"
diff --git a/image_markuper/dicom/models/shapes.py b/image_markuper/dicom/models/shapes.py
index d8347e7..778930d 100644
--- a/image_markuper/dicom/models/shapes.py
+++ b/image_markuper/dicom/models/shapes.py
@@ -1,4 +1,4 @@
-from dicom.models import Dicom
+from dicom.models import Layer
 from django.db import models
 from polymorphic.models import PolymorphicModel
 
@@ -7,8 +7,7 @@ class BaseShape(PolymorphicModel):
     TYPE = "no_type"
     min_coordinates = None
     max_coordinates = None
-    dicom = models.ForeignKey(Dicom, related_name="shapes", on_delete=models.CASCADE)
-    image_number = models.IntegerField()
+    layer = models.ForeignKey(Layer, related_name="shapes", on_delete=models.CASCADE)
 
     def serialize_self(self):
         return {