Objective    To investigate the three-dimensional imaging features of feeding arteries to primary lung cancer and the clinical value by 64-slice spiral CT angiography (CTA).     Methods    The image data of 63 patients who received enhanced chest 64-slice spiral CT scan with at least one bronchial artery clearly displayed were processed at the workstation. Among the 63 cases

there were 43 cases of primary lung cancer (37 cases confirmed by pathology and 6 cases confirmed by the synthesized clinical methods) and 20 cases without any chest lesion confirmed by CT as normal control group. The spatial imaging features of the arteries supplying to lesion were observed and analyzed using multi-planar reformat (MPR)

maximum intensity projection (MIP) and volume rendering (VR).     Results    All 43 cases with lung cancer were supplied by the bronchial arteries and 8 of them were supplied by the bronchial arteries and other arteries of systemic circulation. Three-dimensional imaging features of these feeding bronchial arteries such as origin

number and diameter can be showed clearly. That only one bronchial artery supplying lesion was found in 22 cases (51.2%)

of which the main trunk of bronchial arteries were dilated in 8 cases and both the main trunk and branches were dilated and tortuous in 14 cases. These feeding vessels all extended down to or entered into lesions. That 2 or 3 bronchial arteries supplying lesion was seen in 13 cases (30.2%) and the anastomosis usually occurred. That bronchial arteries and other arteries of systemic circulation supplying the same lesion was observed in 8 cases (18.6%).     Conclusion    Bronchial arteries are the main feeding arteries of primary lung cancer and sometimes other arteries of systemic circulation also supply the lesion. The 64-slice spiral CTA can show the three-dimensional imaging features of bronchial arteries feeding primary lung cancer safely and clearly

which can be used as the roadmap for the intervention therapy of lung cancer.