Head and Neck Imaging
Study of Dynamic Scanning in High-pitch Spiral by Flash CT on Obstructive Sleep Apnea Syndrome and Radiation Dose*
Author：HE Gui-ru, YANG Jin-jun, YANG Jun,et al.
affiliation：The Fifth Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, P.R.China
PDFAbstract
Objective To asses the application value of flash CT amomg the patients with obstructive sleep apnea syndrome (OSAS). Methods 11 patients with OSAS were scanned by high-pitch spiral scanning in sleeping and nonsleeping status respectively ,and upper airway were reconstruct in group A,and the cross-section area with its corresponding sagital,axial,cornal diameters were mesureed respectively. In MSCT scanning mode were applied in group B.The CT dose (ED) were compared between two groups. Results OSAS patients were obviously smaller in sleeping status than in nonsleeping status .There are statistically significant difference at the uvula levels (P<0.05).The ED in group A and B was (0.43±0.019) msv and (0.76±0.033) msv(P<0.05).The effective dose was decreased by 43.43% for group A. Conclusion Flash CT helps evaluating the degree and range of stenois of the upper airway in OSAS patients and is useful in treatment planning. The diagnosis of OSAS disease using flash scan mode can reduce radiation expose than using MSCT scanning mode.
【Keyword】OSAS; Dual-source CT; High-pitch Spiral; Dynamic Scanning; Low Dose
【Chart number】R445.3
【Document Identification Number】A
【DOI】10.3969/j.issn.1672-5131.2015.03.33
Chinese journal of CT and MRI
th13Volume， th 3 Issue
2015Year03Month
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