![]() Lung mass estimates were obtained using all CT scan types, and intercomparisons made to assess lung mass variation according to scan type. Deep inspiration breath-hold diagnostic CT scans of many of the patients were obtained from different scanning sessions at similar time points to evaluate the effect of contrast administration and maximum inspiration breath-hold. Mid expiration breath-hold CT scans were acquired in the same session for many patients. An average CT reconstruction was derived from the ten-phase reconstructions. The 4DCT scans were sorted into ten respiratory phases, representing one complete respiratory cycle. For each patient, free-breathing (FB) and respiratory-gated 4DCT scans were acquired. ![]() Methods: CT scans of 27 patients with lung cancer undergoing stereotactic body radiation therapy treatment planning with PET/CT were analyzed retrospectively. Purpose: The authors sought to evaluate a simple, semiautomated lung mass estimation method using computed tomography (CT) scans obtained using a variety of acquisition techniques and reconstruction parameters for mass correction of medical internal radiation dose-based internal radionuclide radiation absorbed dose estimates.
0 Comments
Leave a Reply. |