Multislice CT Cholangiography With Multiplanar Reconstruction: Experimental Study And Clinical Application Evaluation

PART â…  The experimental parametric study of multiplanar reconstruction on multislice CT.Objective: To investigate the relation of different slice thickness and reconstruction interval with the quantity of their multi-planar reconstruction (MPR) image, raise rational scanning parameters of Mx8000 the Four-layer spiral CT to obtain ideal MPR imaging. Methods: To scan the colon specimen with different slice thickness as 6.5mm, 5.0mm, 3.2mm, 2.0mm and 1.0mm, perform reconstruction with 0.5mm, 1.0mm or 2.0mm intervals for each sets at workstation. A statistical analysis was made after all the series of MPR imaging be graded. Scan circumsciption and CT dose index also be considered. Results: The thinner scanning slice thickness, the higher score of MPR imaging with the same interval reconstruction. Among the imaging with the same slice thickness, the thinner interval reconstruction the higher score,and there are no prominent statistical difference ( P>0.05) between the imagings with 0.5mm and 1.0mm interval reconstruction. The scan circumscription of 1.0mm slice thickness is too small, and the CTDI of 1.0mm slice thickness is much higher than of the other slice thickness. The scan circumscription of 2.0mm slice thickness is 88mm, and its CTDI is close to that of the other slice thickness. Conclusion: The thinner scanning slice thickness, the better quality of its MPR imaging. Reconstruction with appropriate interval makes the MPR imaging better.Scan with 2.0mm slice thickness at Mx8000 set. and reconstruct with 1.0mm interval, can obtain satisfactory MPR imaging with practicality.