Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (35): 6540-6543.doi: 10.3969/j.issn.1673-8225.2010.35.020

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Multi-slice spiral CT and virtual endoscopy in reconstruction of pig intestinal tract

Zhang Bin1, Zhu Ming2, Qiu Hai-sheng2   

  1. 1 Department of Digestion, 2 Department of Radiology, Shanghai Children’s Medical Center, Shanghai Jiao Tong University, Shanghai  200127, China
  • Online:2010-08-27 Published:2010-08-27
  • Contact: Zhu Ming, Doctoral supervisor, Department of Radiology, Shanghai Children’s Medical Center, Shanghai Jiao Tong University, Shanghai 200127, China
  • About author:Zhang Bin★, Master, Attending physician, Department of Digestion, Shanghai Children’s Medical Center, Shanghai Jiao Tong University, Shanghai 200127, China dr8164@126.com

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Abstract:

BACKGROUND: Appropriate reduction of CT scanning dose while not influencing examination is the trend in future. Low dose CT intestinal tract reconstruction has become a focus in recent studies.
OBJECTIVE: To explore the feasibility of low dose multi-slice CT (MSCT) scan in reconstruction of intestinal tract.
METHODS: Fresh colons of pigs were made into 36 polyps moulds and randomly divided into 150 mA, 100 mA and 50 mA groups. All pieces of colon underwent MSCT scanning with the angle of 0°, 45° and 90° to the gantry. Intestinal tract was reconstructed using virtual endoscopy and the sensitivity was calculated.
RESULTS AND CONCLUSION: The number of polyps that was detected by low dose MSCT were 36 polyps for 150 mA group, 35 polyps for 100 mA group and 33 polyps for 50 mA group with diagnostic sensitivity 100%, 97.2% and 91.7% (P=0.162). The number of detection was 34 polyps for 0° group, 34 polyps for 45° group and 36 polyps for 90° group with diagnostic sensitivity 94.4%, 94.4% and 100% (P=0.354). The reconstruction of low dose MSCT could offer sufficient information for diagnosis and satisfy the diagnose requirement of colon polypous. Tube current of 50 mA follows the principle of legalisation and optimizing shelter of X ray and establish balance between radiation dosage and picture quality.

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