Cone Beam CT Scanning in Lung and Bladder Cancer.

Inclusion Criteria:

• Patient has biopsy proven limited stage SCLC
• receiving radical concurrent chemoradiotherapy
• no prior chest RT
• no prior surgical resection of lung tumor
• no prior chemotherapy
• patients' lung tumors should be centrally-located to minimize the effect of respiratory motion
• patient has biopsy proven TCC bladder
• receiving radical concurrent chemoradiotherapy or RT alone
• no prior chemotherapy
• patient signs study-specific consent form

Exclusion Criteria:

• mixed small cell and non small cell histology
• patient not being treated with concurrent chemoradiotherapy
• chemoradiotherapy given sequentially
• previous chest RT
• previous chemotherapy
• prior surgical resection of lung mass
• patient ineligible for pelvic RT
• patient does not sign study consent