The Application Study Of Bronchial Arteries With MSCT Angiography

PART1 MSCT Angiography of Bronchial ArteryAbstract Objective: To investigate the value of MSCT angiography of bronchial artery.Methods:Fifty patients underwent MSCT angiography per Surestart technique (experimental group, n= 25) or using empirical timing with a delay time of (21±3) s,(control group, n=25). The setting of spiral CT was 1.25 mm in thickness, 15 in pitch, and 0.5 s/r by scanning speed. CTA was performed using 350 mgI/mL nonionized contrast medium, delivered at a dose of 1.5 mL/kg and at a rate of 3?5 mL/s. Post processing technique such as shaded volume reconstruction, multiplanar reconstruction, cured planar reconstrution and maximum intensity projection were used to generate the 3D imaging of bronchial artery.Results:Sixty-one bronchial arteries were visualized of the 25 cases in the experimental group (mean: 2.44 arteries per case) versus 33 of the 25 cases in the control group (mean: 1.32 arteries per case). The rate of successful visualization and number of visualized arteries were found to be significantly different between the two groups (P<0.05).Conclusion:MSCTA was demonstrated to be a safe and effective method for display of bronchial arteries. In contrast to empirical timing, SureStart technique appeared to provide clearer imaging of bronchial artery.PART2 The value of MSCTA in positioning the origin of supplying bronchus artery of lung cancerAbstract Objective:To explore the value of MSCTA in positioning the origin of supplying bronchus artery (BA) of lung cancer.Methods:seventy cases with primary lung cancer were performed by bronchus artery CT angiography (BA-CTA). By the VR data merging technique, the artery (containing the BA, aorta and the lung cancer lesions), bronchus, and ribs were merged together. Then, the origins of feeding BAs were positioning in a coordinate system with a center of the lower margion of the center of trachea carine, which was set up in the coronial section. The Baorigin was also positioned in the coordinate system, which was set up in the counter-clockwise 45 degree inclined axial section of BA origining.Results:One hundred feeding BAs of 68 in all the 70 cases could be presented clearly. By the three-dimensional VR merging images, the origins and locations of BAs could be clearly presented in the coronal and axial coordinate system respectively. Fifty-five BAs were in 1st quadrant, second BAs in 2nd quadrant, Forty-three BAs in the 4th quad-rant. Twenty-second BAs were from the anterior wall of the descend aorta, fifty-one Bas were from the right wall of the descend aorta, Four BAs were from the posterior wall of the descend aorta,nine Bas were from the left wall of the descend aorta,one Bas were from the right subclavian aorta,one BA was from the left common carotid aorta,one BA was from the right thyrocervical trunk.Conclusion:MSCTA can clearly show the BAs and their origins,and determine the origin of feeding BA, which is of clinical value to provid true and valuable information for BAs origins for interventional therapy of lung cancer.PART3 Impact of multi-layer spiral CT angiography of bronchial artery in assessment of the bronchial artery supply to the primary lung cancerAbstract Objective:To investigate the blood supply of primary lung cancer (PLC) using CT angiography for bronchial artery (BA).Methods:Seventy-five patients under went MSCT angiography per Surestart technique (experimental group, n= 45) (control group, n=30). The setting of spiral CT was 1.25 mm in thickness, 15 in pitch, and 0.5 s/r by scanning speed. CTA was performed using 350 mgI/mL nonionized contrast medium, delivered at a dose of 1.5 mL/kg and at a rate of 3?5 mL/s. Post processing technique such as shaded volume reconstruction,multiplanar reconstruction, cured planar reconstrution and maximum intensity projection were used to generate the 3D imaging of bronchial artery.Results:One hundred and twenty-two bronchial arteries were visualized of the 45 cases in the experimental group (mean: 2.71 arteries per case) versus 68 of the 30 cases in the control group (mean: 2.27 arteries per case). The rate of successful visualization and number of visualized arteries were found to be significantly different between the two groups (P<0.05). Conclusion:Primary lung cancer patient shows dilated bronchial arteries and increased bronchial artery blood flow,It is further demonstrated that the bronchial artery is the main vessel of blood supply to the primary lung cancer as shown by MSCT angiography of bronchial artery.