PURPOSE To see the gross tumor volume (GTV) dependency according to the phase selection and reconstruction methods, we measured and analyzed the changes of tumor volume and motion at each phase in 20 cases with lung cancer patients who underwent image-guided radiotherapy. MATERIALS AND METHODS We retrospectively analyzed four-dimensional computed tomography (4D-CT) images in 20 cases of 19 pa...

The motion management in stereotactic body radiation therapy (SBRT) is a key to success for a SBRT program, and still an on-going challenging task. A major factor is that moving structures behave differently than standing structures when examined by imaging modalities, and thus require special considerations and employments. Understanding the motion effects to these different imaging processes ...

Pediatric chest MRI faces many challenges. High resolution scans of the lungs and airways are compromised by long imaging times, low lung proton density signal and cardiac and respiratory motion. A low lung signal is problematic in imaging relatively normal lung tissue, but less so for diseased lung tissue. Indeed, various pathologic conditions often result in an increased signal from lung pare...

conclusion lesion depth from the pleural surface and the presence of emphysema were strongly correlated with the increasing incidence of pneumothorax after ct-guided pcnb. our results may be applicable for the risk management of pcnbs to reduce pneumothorax as a complication. background previous studies identifying risk factors for pneumothorax in percutaneous core needle lung biopsies reported...