2023 World Conference on Lung Cancer (Posters)-EP01.01. Radiation Exposure in Intraoperative Navigation for Peripheral Small Pulmonary Nodule

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This document discusses a study conducted to evaluate radiation exposure in intraoperative navigation for peripheral small pulmonary nodules. The study aimed to determine the relationship between the number of cone-beam CT (CBCT) scans and the patient's radiation dose, as well as the correlation between tumor size on CBCT and preoperative CT. The study was conducted from April 2020 to March 2023 at Teikyo University Hospital.<br /><br />The marking method used in the study involved placing metal clips as markers around 30 mm away from the nodules. Cone-beam CT imaging was performed intraoperatively to identify the nodules and their relationship with the markers. The study found that there were no marking-related complications and the average number of CBCT scans was 2.1. The radiation dose tended to increase with the number of scans, with an average dose of 4.8 mGy over three scans. However, this dose was deemed acceptable as it was lower than the usual CT dose of 6-10 mGy. The study also found a high correlation between tumor size measured by CBCT, preoperative CT, and pathological assessment.<br /><br />The study concludes that efforts should continue to be made to reduce the number of CBCT scans and further decrease the patient's radiation dose. A multicenter study comparing radiation exposure between different methods is also underway. The document acknowledges the contributions of various individuals and institutions to the study.<br /><br />In summary, this study evaluated radiation exposure in intraoperative navigation for peripheral small pulmonary nodules. The findings showed a correlation between the number of CBCT scans and patient's radiation dose, as well as a strong correlation between tumor size measured by CBCT, preoperative CT, and pathological assessment. Efforts should be made to reduce radiation dose and further research is ongoing to compare different methods of navigating small pulmonary nodules.

Asset Subtitle

Yuichi Saito

Meta Tag

Speaker Yuichi Saito

Topic Risk Factors, Risk Reduction & Tobacco Control

Keywords

radiation exposure

intraoperative navigation

peripheral small pulmonary nodules

cone-beam CT scans

patient's radiation dose

tumor size

CBCT

preoperative CT

pathological assessment

marking method