Evaluating the accuracy of 4D‐<scp>CT</scp> ventilation imaging: First comparison with Technegas <scp>SPECT</scp> ventilation

Abstract

We performed a validation of CTVI using clinically available 4DCT and Technegas V/Q-SPECT for 11 lung cancer patients. The results reinforce earlier findings that the spatial accuracy of CTVI exhibits significant interpatient and intermethod variability. We propose that the most likely factor affecting CTVI accuracy was poor image quality of clinical 4DCT.