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Role of post-mapping computed tomography in virtual-assisted lung mapping.
Masaaki Sato1, Kazuhiro Nagayama1, Hideki Kuwano1
1Department of Thoracic Surgery, The University of Tokyo Hospital, Tokyo, Japan.
Asian Cardiovascular & Thoracic Annals
|January 13, 2017
Summary
Virtual-assisted lung mapping uses virtual bronchoscopy to predict dye marking locations, but discrepancies exist. Post-mapping computed tomography is crucial for accurate surgical guidance in lung procedures.
Area of Science:
- Pulmonology
- Thoracic Surgery
- Medical Imaging
Background:
- Virtual-assisted lung mapping (VALM) is an emerging bronchoscopic technique for preoperative lung marking.
- It utilizes virtual bronchoscopy (VB) to predict dye marking locations.
- Post-mapping computed tomography (CT) confirms actual marking positions.
Purpose of the Study:
- To evaluate the accuracy of VB-predicted marking locations in VALM.
- To determine the role of post-mapping CT in confirming actual markings.
Main Methods:
- Automated and manual VB were used for predicting marking locations.
- Bronchoscopic dye marking was performed under local anesthesia.
- Post-mapping CT confirmed actual marking locations, and discrepancies were analyzed.
Main Results:
- Average discrepancy between predicted and actual markings was 30 mm.
- No significant difference in accuracy between automated and manual VB.
- Markings in upper lobes showed greater discrepancies than in lower lobes (p < 0.01).
Conclusions:
- VB predictions in VALM can deviate significantly from actual dye markings (average 3 cm).
- Post-mapping CT is indispensable for confirming accurate marking locations.
- Despite prediction discrepancies, 3D image guidance using post-mapping CT enabled successful lesion resection.
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