# Retrieving statistics from RTSTRUCT and scalar volume - binary labelmap representation computation is very slow

**URL:** https://discourse.slicer.org/t/retrieving-statistics-from-rtstruct-and-scalar-volume-binary-labelmap-representation-computation-is-very-slow/28100
**Category:** Support
**Tags:** segmentation
**Created:** [February 28, 2023, 5:15pm UTC](https://discourse.slicer.org/t/retrieving-statistics-from-rtstruct-and-scalar-volume-binary-labelmap-representation-computation-is-very-slow/28100 "2023-02-28T17:15:29Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![Sunderlandkyl](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sunderlandkyl/32/79987_2.png) [@Sunderlandkyl](https://discourse.slicer.org/u/Sunderlandkyl)
#### Post date: [March 2, 2023, 9:32pm UTC](https://discourse.slicer.org/t/retrieving-statistics-from-rtstruct-and-scalar-volume-binary-labelmap-representation-computation-is-very-slow/28100/5 "2023-03-02T21:32:20Z")

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There are a lot of complex hollow structures that are giving the planar contour → closed surface conversion trouble. Likely because of this some surfaces are poorly constructed, causing a problem when converting it to a binary labelmap.

As a workaround, you can instead convert the structures to binary labelmaps by going through the ribbon model representation.

1. Click on the arrow beside “Create” for Binary labelmap and click “Advanced create…”:  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/c/1c5615ca7a56b364899a0358ac8b4e2695008d40.png)

2. Choose the “Planar contour → Ribbon model → Binary labelmap” path and click create:  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/d/4/d4fbe41bddbaeba2d8d908b034e67ebda0a5ad19.png)

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