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Classification of Bones

Classification of Bones

The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
Long and Short Bones
The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The long...

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Updated: Jul 23, 2026

Deep Learning-Based Segmentation of Cryo-Electron Tomograms

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Published on: November 11, 2022

Automatic pelvic fracture segmentation: a deep learning approach and benchmark dataset.

Yanzhen Liu¹, Sutuke Yibulayimu¹, Gang Zhu²

¹Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.

Frontiers in Medicine

|April 30, 2025

Summary

This study introduces an automated deep learning method for segmenting pelvic fractures in CT scans, significantly improving accuracy and efficiency over manual techniques. The advanced approach precisely isolates bone fragments, aiding trauma diagnosis and surgical planning.

Keywords:

CT segmentation deep learning image-guided surgery pelvic fracture reduction planning

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Area of Science:

Medical Imaging
Artificial Intelligence
Orthopedic Surgery

Background:

Pelvic fracture segmentation from CT scans is vital for trauma care and surgery.
Manual segmentation is laborious, subjective, and prone to errors.
Complex pelvic anatomy and fracture variations challenge automated methods.

Purpose of the Study:

To develop an automated deep learning-based method for accurate pelvic fracture segmentation in CT images.
To effectively isolate hipbone and sacrum fragments, including complex fracture patterns.

Main Methods:

A two-stage deep learning approach: anatomical segmentation followed by fracture segmentation.
Utilized a distance-weighted loss function to focus on fracture surfaces.
Incorporated multi-scale deep supervision and smooth transition strategies for enhanced performance.

Main Results:

Achieved a high average Dice coefficient of 0.986.
Demonstrated a low average symmetric surface distance of 0.234 mm.
Outperformed traditional max-flow and transformer-based methods in accuracy.

Conclusions:

The proposed deep learning method offers a robust and accurate solution for pelvic fracture segmentation.
This automated approach has the potential to enhance clinical workflows in trauma diagnosis and surgical planning.