title: [Assessment of congenital vascular rings with MDCT on children].
abstract: OBJECTIVE
  To evaluate the value of MDCT on diagnosis of congenital vascular rings on children.
  
  
  METHODS
  Retrospective analysis on 43 cases of congenital vascular rings, which underwent MDCT during Oct 2008 to Dec 2014 in Beijing Anzhen hospital affiliated to capital medical university. 21 males, 22 females; age from 29 days to 8 years, mean age 1.46 years, 33 cases are not beyond 1 year. All the results were compared with that of the echocardiogram or record of the surgery. The CT data were read and reconstructed with multiplanar reconstruction (MPR), maximum intensity projection (MPR), minimum intensity projection (MinIP), volume rendering (VR). The image quality was evaluated and the diagnostic value and the standard diagnostic program were discussed.
  
  
  RESULTS
  Of 43 cases of vascular rings:there were 6 cases of pulmonary artery sling (13.95%), 9 cases of right aortic arch /aberrant left subclavian artery(20.93%), 18 cases of left aortic arch/aberrant right subclavian artery (41.86%), 10 cases of double aortic arch (23.26%). Forty cases (93.02%) were combined with other cardiovascular or pulmonary malformations. Every malformation was revealed clearly and proved by echocardiogram. Of 3 cases (6.98%) without any other malformation, 2 cases were combined tracheal stenosis. A pulmonary artery sling was proved by surgery; the other 2 cases were double aortic arch. All the images of 43 cases could be reconstructed well. MPR and VR showed the origin, shape, and whole course of vascular rings directly; MinIP and VR could display the shape, width and development of trachea, revealed the relationship between vascular rings, trachea and esophagus. It was important to show and measure the component vascular of the ring. Attention should be paid to the whole course of trachea and esophagus, especially those segments which were close to the ring vascular. The tracheal stenosis as well as intra-cardio anatomy malformations should be measured on MPR images if existed. According to the segmental analysis method, comes the overall final diagnosis. A standard diagnostic program on vascular ring was proposed.
  
  
  CONCLUSIONS
  MDCT axis images with various 3D post processing methods could reveal the compose of vascular rings and the relationship between vascular rings, trachea and esophagus.
authors.affiliation: Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100013, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zang
authors.affiliation: Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100013, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100013, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.affiliation: Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100013, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Du
authors.affiliation: Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100013, China.
authors.forename: Jiahui
authors.initials: J
authors.lastname: Du
authors.affiliation: Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100013, China; Email: biao-lv2007@sina.com.
authors.forename: Biao
authors.initials: B
authors.lastname: Lü
authors.affiliation: Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100013, China.
authors.forename: Zhanming
authors.initials: Z
authors.lastname: Fan
mesh_terms: D001013:Aorta, Thoracic; D001015:Aortic Arch Syndromes; D000068476:Beijing; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014132:Trachea; D014135:Tracheal Stenosis