[Diagnostic value of magnetic resonance imaging in special-site ectopic pregnancy].

Objective: To explore the magnetic resonance imaging (MRI) features and diagnostic value of special-site ectopic pregnancy.

Methods: The MRI features of special-site ectopic pregnancy on 39 pathologically confirmed cases were retrospectively analyzed. All cases received ultrasonic inspection, MRI plain scan and 11 cases underwent enhanced scan.

[Clinical application of multi-slice computed tomography angiography low-dose scan in pulmonary veins and left atrium].

Objective: To investigate the clinical application of multi-slice computed tomography angiography (MSCTA) low-dose scan in pulmonary veins and left atrium and to reduce the radiation dose.

Method: 100 middle-sized patients underwent pulmonary veins and left atrium MSCTA were collected and randomly divided into five groups averaged. The tube current were 250 mAs (conventional dose), 200, 150, 100, and 80 mAs (low dose), respectively.

[The diagnostic value of MSCT multi-dimensional reconstructions for congenital vascular ring with tracheal stenosis].

Objective: To evaluate the diagnostic value of multi-slice CT (MSCT) reconstructions for congenital vascular rings together with tracheal stenosis.

Methods: 9 cases of children with congenital vascular ring and tracheal stenosis confirmed by surgery were collected in the study, all cases had undergone thin slice CT contrast enhancement, the MSCT data were transmitted to the workstation for multiplanar reconstruction (MPR), volume rendering technique (VRT) and VR transparency reconstruction. With the surgical results as the gold standard, the imaging characteristics of echocardiography (UCG) and MSCT were comparatively analyzed.