1. Practical Assessment of Bronchoscopically Inserted Fiducial Markers for Image Guidance in Stereotactic Lung Radiotherapy 
Price Jackson, PhD, Daniel P. Steinfort, PhD, Tomas Kron, PhD, Shankar Siva, PhD 
Journal of Thoracic Oncology 
Volume 11, Issue 8, Pages (August 2016)
DOI: /j.jtho
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2. Figure 1
Coregistered computed tomography (CT) (top) and cone beam CT (bottom) images for a patient with a right upper lobe lesion. Note the severity of streak/star artifact on cone beam CT.
Journal of Thoracic Oncology  , DOI: ( /j.jtho )
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3. Figure 2
Implanted fiducials were clearly resolved using onboard kilovoltage imaging for image-guided radiotherapy.
Journal of Thoracic Oncology  , DOI: ( /j.jtho )
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4. Figure 3
Digitally reconstructed radiograph (A) and the associated electronic portal image obtained during treatment (B). This gantry angle (320°) in this case provided best visibility.
Journal of Thoracic Oncology  , DOI: ( /j.jtho )
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5. Figure 4
Star artifact for patient with motion predominantly along the superior-inferior axis (A) and for a patient with some component of lateral motion (B). In the worst-case scenario (a patient with a small lesion and lateral respiratory motion), the implanted fiducial offers very limited information to improve image-guided localization.
Journal of Thoracic Oncology  , DOI: ( /j.jtho )
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