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Related Concept Videos

Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...

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Related Experiment Video

Updated: May 30, 2026

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique
05:57

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique

Published on: January 6, 2023

Iliac screw fixation using computer-assisted computer tomographic image guidance: technical note.

John H Shin1, Daniel J Hoh, Iain H Kalfas

  • 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA. shin.john@mgh.harvard.edu

Neurosurgery
|August 6, 2011
PubMed
Summary
This summary is machine-generated.

Computed tomographic (CT)-based image guidance improves iliac screw fixation for spinal fusion. This technique enhances 3D pelvic visualization, reducing complications from soft-tissue dissection and iliac breach during screw placement.

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Published on: September 16, 2022

Area of Science:

  • Spine surgery
  • Orthopedic surgery
  • Medical imaging

Background:

  • Iliac screw fixation is crucial for lumbosacral fusion in cases of deformity, tumor, or pseudarthrosis.
  • Complications arise from inaccurate screw trajectory and extensive soft tissue dissection.

Purpose of the Study:

  • To detail the methodology of iliac screw fixation utilizing computed tomographic (CT)-based image guidance.
  • To present a novel approach for enhancing surgical precision in spinal fusion procedures.

Main Methods:

  • Preoperative CT scans of the lumbosacral spine are used for intraoperative registration of anatomic landmarks.
  • Image guidance software visualizes the ideal screw trajectory and target on a computer screen.
  • Surgical steps involve probe-guided trajectory confirmation, drilling, and screw placement with real-time depth measurement.

Main Results:

  • Accurate placement of iliac screws can be confirmed using standard radiographic imaging.
  • The described technique facilitates precise screw insertion.

Conclusions:

  • CT-guided navigation provides crucial 3-dimensional visualization of the pelvis during surgery.
  • This method significantly minimizes complications related to soft-tissue dissection and potential iliac bone breach.