ABSTRACT
Objective:To analyze the multi-slice spiral computed tomography (MSCT) features of gastric ectopic pancreas (GEP).Methods:The MSCT images of 21 patients with GEP admitted to Sir Run Run Shaw Hospital Affiliated to Medical College of Zhejiang University from July 2016 to March 2019 were reviewed. The size, location, growth pattern, cystic, peritumoral fat-line of the lesions were included. The CT value was measured including the phase of pre-enhancement, artery phase, vein phase and the ratio between total enhancements and pre-enhancement CT values. Finally, the relationships among them were performed.Results:The long diameter was (20.80±11.44)mm, short diameter (15.14±5.96)mm, ratio between long and short diameter 1.34±0.25; GEP was usually in an ovoid shape [12(57.1%)], located in gastric body [12(57.1%)], in a exoluminal growth pattern [12(57.1%)]. Peritumoral fat-line was seen in 6 patients (28.6%), and a cyst was seen in one patient (4.8%). GEP was presented with persistently enhancing (progressive) pattern. Pre-enhancement CT values was (40.99±8.51)HU, artery phase (78.11±18.27)HU, vein phase (93.87±15.14)HU and the ratio between total enhancements and pre-enhancement CT values 1.41±0.75. Pre-enhancement CT values had a negative relationship with the ratio between total enhancements and pre-enhancement CT values with a correlation coefficient of -0.74.Conclusions:MSCT could well display the size, location, growth pattern, cystic, peritumoral fat-line and enhancement characteristics of GEP, which is helpful with clinical practice.
ABSTRACT
Objective:This study aimed to evaluate the performance of breast magnetic resonance imaging (MRI) abbreviated protocol (AP) in diagnosing breast neoplasms.Methods:We retrospectively analyzed the data of 86 patients who had undergone breast MRI examinations and compared the images using an AP and full diagnostic protocol (FDP). The AP consisted of axial T2-weighted imaging (T2WI), diffusion-weighted imaging (DWI), and four-phase dynamic enhancement sequences. The FDP consisted of sagittal T2WI, axial T2WI, T1-weighted imaging, DWI, and seven-phase dynamic enhancement sequences. All the images were analyzed using the Breast Imaging Reporting and Data System (BI-RADS). The consistencies between the different protocols were then calculated. With the pathological diagnosis as the gold standard, the diagnostic capabilities of the two protocols were compared.Result:Two radiologists analyzed the AP and FDP images. The consistencies in the BI-RADS between the different protocols were 0.856 and 0.900, and those in time-signal intensity curves (TICs) were 0.822 and 0.922. Within the same protocol, the consistencies in the BI-RADS between different radiologists were 0.744 and 0.822, and those in TICs were 0.889 and 0.878. No significant differences were found ( P>0.05). In terms of diagnosing malignant neoplasms using the BI-RADS, the sensitivities of the AP and FDP were 89.8% (95 %CI: 0.785-0.958) and 91.5% (95 %CI: 0.806-0.968), respectively; their specificities were 71.0% (95 %CI: 0.518-0.851) and 77.4% (95 %CI: 0.585-0.897), respectively; and the areas under the curves (AUCs) were 0.804 (95 %CI: 0.698-0.910) and 0.845 (95 %CI: 0.748-0.941), respectively. Diagnosing malignant neoplasms using TICs, the sensitivities of the AP and FDP were 86.4% (95 %CI: 0.745-0.936) and 89.8% (95 %CI: 0.785-0.958), respectively; their specificities were 61.3% (95 %CI: 0.423-0.776) and 67.7% (95 %CI: 0.485-0.827), respectively, and the AUCs were 0.739 (95 %CI: 0.623-0.855) and 0.788 (95 %CI: 0.679-0.897), respectively. There was no significant difference between the AP and FDP ( P>0.05). The MRI acquisition times of the AP and FDP were 11.97±0.94 min and 21.25±1.12 min, respectively, with a significant difference ( P<0.001). The average reading time was reduced by 13.5% using the AP compared with that using the FDP. Conclusion:Compared with the FDP, the AP reduced the acquisition time and maintained the diagnostic accuracy, which can be used as an improved pattern for MRI screening in high-risk populations of breast neoplasms.
ABSTRACT
Objective To investigate the mediating role of positive psychological capital on the relationship between professional identity and learning burnout in higher vocational nursing students.Methods Using professional identity questionnaires,positive psychological capital questionnaires and college students' learning burnout scales to survey 627 nursing students in higher vocational colleges in a certain area.Results There was no significant difference in gender of nursing students' professional identity (t =0.432,P＞0.05).But the behavioral factors in female students were significantly higher than those in male students ((3.36±0.69) vs (3.20±0.76),t=-2.411,P＜0.05).And in different grade the behavioral factor had a significant difference too(F=9.490,P＜0.01).Obviously,there was negative correlation between positive psychological capital and learning burnout (r=-0.533,P＜0.01),and positive correlation between professional identity and active psychological capital in vocational nursing students (r=0.474,P＜0.01),and negative correlation with learning burnout (r=-0.540,P＜0.01).Positive psychological capital plays partially mediating role in professional identity and learning burnout (β =-0.17,ab/c =O.46,95％ CI =-O.23 ～-0.13).Conclusion Positive psychological capital and professional identity have important predictive effects on learning burnout in higher vocational nursing students.Positive psychological capital plays partially mediating role in professional identity and learning burnout.