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Related Concept Videos

Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
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Related Experiment Video

Updated: Dec 26, 2025

Electromagnetic Navigation Transthoracic Nodule Localization for Minimally Invasive Thoracic Surgery
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Marking method for peripheral non-palpable pulmonary nodules using a mobile computed tomography scanner with a

Ryo Fujikawa1, Yoshiro Otsuki2, Hidenori Nakamura3

  • 1Department of General Thoracic Surgery, Seirei Hamamatsu General Hospital, Naka-ku Sumiyoshi 2-12-12, Hamamatsu, Shizuoka, 430-8558, Japan. reekun715@gmail.com.

General Thoracic and Cardiovascular Surgery
|March 15, 2020
PubMed
Summary

This study introduces a novel mobile CT scanner and navigation system for precise localization of non-palpable lung nodules during surgery, avoiding complications associated with traditional methods.

Keywords:
Ground glass noduleImage-guided video-assisted thoracoscopic surgeryMobile computed tomographyNavigation system

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Area of Science:

  • Thoracic Surgery
  • Medical Imaging
  • Surgical Navigation

Background:

  • Accurate intraoperative localization of non-palpable pulmonary nodules is critical for video-assisted thoracoscopic surgery (VATS).
  • Computed tomography (CT)-guided hook-wire localization, a common method, carries a risk of rare but fatal complications like air embolism.
  • A safer and more precise localization technique is needed to improve patient outcomes in VATS.

Purpose of the Study:

  • To present a novel method using a mobile CT scanner and navigation system for intraoperative localization of non-palpable pulmonary nodules.
  • To overcome the limitations and potential fatal complications associated with conventional CT-guided hook-wire localization.
  • To establish a morbidity-free localization technique for VATS.

Main Methods:

  • A mobile CT scanner was employed to acquire three-dimensional images of the target pulmonary nodules.
  • These images were transferred to a navigation system, enabling virtual fluoroscopy.
  • A navigation probe guided the identification of the nearest skin entry point, followed by stamping the lung surface with a dyed gauze ball and marking the needle entry point.

Main Results:

  • The integrated mobile CT scanner and navigation system allowed for precise localization of non-palpable pulmonary nodules.
  • The method enabled verification of the needle's positional relationship to the target lesion via an additional CT scan.
  • No procedure-related morbidity was observed during the application of this novel localization technique.

Conclusions:

  • The application of a mobile CT scanner with a navigation system offers a safe and effective alternative for intraoperative localization in VATS.
  • This technique successfully addresses the risks associated with traditional hook-wire localization, particularly air embolism.
  • The described method provides accurate landmarking and verification, enhancing the safety and efficacy of pulmonary nodule resection.