TARGETED MULTISLICE COMPUTED TOMOGRAPHY FOR MONITORING LIKELY BENIGN PULMONARY INCIDENTALOMAS: TECHNIQUE AND CLINICAL...

Area of Science:

• Radiology
• Medical Imaging
• Pulmonary Medicine

Background:

• Pulmonary nodules are frequently detected incidentally, necessitating long-term imaging surveillance.
• Optimizing multislice computed tomography (MSCT) protocols is crucial to minimize radiation exposure in patients requiring prolonged monitoring.
• Targeted, ultralow-dose scanning offers a solution for reproducible, informative data acquisition with reduced radiation.

Purpose of the Study:

• To develop and validate a targeted MSCT protocol for monitoring probably benign pulmonary nodules.
• To evaluate the diagnostic performance and radiation dose of the targeted protocol against a standard full-dose protocol.
• To determine the clinical utility of the targeted protocol for routine application in managing incidental pulmonary nodules.

Main Methods:

• A comparative study involving 92 patients with incidentally detected solitary pulmonary nodules.
• Two MSCT protocols were evaluated: a standard full-dose protocol (A) and a targeted ultralow-dose protocol (B).
• Radiation exposure (CTDIvol, DLP) and diagnostic quality were compared, with nodule dynamics assessed by two independent radiologists.

Main Results:

• The targeted protocol reduced dose-length product (DLP) over eightfold and CTDIvol by approximately 40%, achieving an 85% effective dose reduction.
• High image quality was maintained with the targeted protocol.
• The protocol reliably differentiated stable nodules from those requiring intervention, with 88% remaining stable and 4.3% requiring surgery, all demonstrating benign histology.

Conclusions:

• The developed targeted MSCT protocol is safe and effective for monitoring probably benign pulmonary nodules.
• It significantly reduces cumulative radiation exposure without compromising diagnostic accuracy.
• The protocol should be integrated into routine radiological practice for enhanced patient safety.