| LI Xiang,JIN Chao-lin,ZHANG Shu-tong.Impact of imaging quality of change pitch on coronary CTA with 64-detector row CT[J].Chinese Journal of Radiological Medicine and Protection,2009,29(3):323-325 |
| Impact of imaging quality of change pitch on coronary CTA with 64-detector row CT |
| Received:July 07, 2008 |
| DOI：10.3760/cma.j.issn.0254-5098.2009.03.029 |
| KeyWords:Coronary artery Angiography Tomography X-ray computed tomography Pitch |
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| Abstract:: |
| Objective To investigate the impact of imaging quality of pitch on coronary CT angiography (CTA) with 64-detector row CT.Methods 566 patients were divided into four groups according to heart rate (≤50,51~70,71~80 and≥80 bpm).Three dimensional reconstructions were used such as volume rendering(VR),maximum intensity projection(MIP)and curved planar reformation(CPR).Each group was divided into control group and experimential group randomly,using normal pitch and revised pitch respectively,and the imaging quality and influencing factors were analyzed among the four groups.Results There was significant difference in imaging quality among the four groups (P＜0.05).Each group had difference in imaging quality with normal pitch and revised pitch.Conclusions The revised pitch helps to improve the imaging quality and meet the demand of diagnosis. |
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