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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of Foreign Language Teaching & Research
- نوع مقاله: Journal Article
- کلمات کلیدی: EFL,Challenges,project-based learning,high school teachers
- چکیده:
- چکیده انگلیسی: Research on using project work in teaching various disciplines has pointed out a number of challenges facing teachers. Similar research in the EFL classroom, however, has been under-researched. This study aimed to fill the gap with a report on the Vietnamese high school teachers’ challenges in implementing project-based learning in the setting of curricular innovation in English instruction nationwide. The participants of the study were thirty-three EFL teachers from sixteen high schools in both rural and urban areas of the Mekong Delta, Vietnam. With a questionnaire and an in-depth interview, both quantitative and qualitative data were collected. Data analysis indicated that the teachers faced major challenges in time management, adaptation of project activities, student support, and project assessment. These results provide useful implications for how innovative approaches can be successfully implemented, especially with respect to the kind of support EFL teachers need to make project-based learning more feasible in the Vietnamese educational context and similar ones.
- انتشار مقاله: 07-11-1397
- نویسندگان: Loi Van Nguyen,Ly Huynh Cong Nguyen
- مشاهده
- جایگاه : پژوهشی
- مجله: Asia Oceania Journal of Nuclear Medicine and Biology
- نوع مقاله: Journal Article
- کلمات کلیدی: PET/CT,FDG,portal vein tumor thrombosis (PVTT),hepatocellular carcinoma (HCC)
- چکیده:
- چکیده انگلیسی: Objective(s): In this study, we aimed to describe the characteristics of portal vein tumor thrombosis (PVTT), complicating hepatocellular carcinoma (HCC) in contrast-enhanced FDG PET/CT scan.
Methods: In this retrospective study, 9 HCC patients with FDG-avid PVTT were diagnosed by contrast-enhanced fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT), which is a combination of dynamic liver CT scan, multiphase imaging, and whole-body PET scan. PET and CT DICOM images of patients were imported into the PET/CT imaging system for the re-analysis of contrast enhancement and FDG uptake in thrombus, the diameter of the involved portal vein, and characteristics of
liver tumors and metastasis.
Results: Two patients with previously untreated HCC and 7 cases with previously treated HCC had FDG-avid PVTT in contrast-enhanced FDG PET/CT scan. During the arterial phase of CT scan, portal vein thrombus showed contrast enhancement in 8 out of 9 patients (88.9%). PET scan showed an increased linear FDG uptake along the thrombosed portal vein in all patients. The mean greatest diameter of thrombosed portal veins was 1.8 ± 0.2 cm, which was significantly greater than that observed in normal portal veins (P<0.001). FDG uptake level in portal vein thrombus was significantly higher than that of blood pool in the reference normal portal vein (P=0.001). PVTT was caused by the direct extension of liver tumors.
All patients had visible FDG-avid liver tumors in contrast-enhanced images. Five out of 9 patients (55.6%) had no extrahepatic metastasis, 3 cases (33.3%) had metastasis of regional lymph nodes, and 1 case (11.1%) presented with distant metastasis. The median estimated survival time of patients was 5 months.
Conclusion: The intraluminal filling defect consistent with thrombous within the portal vein, expansion of the involved portal vein, contrast enhancement, and linear increased FDG uptake of the thrombus extended from liver tumor are findings of FDG-avid PVTT from HCC in contrast-enhanced FDG PET/CT.- انتشار مقاله: 15-03-1393
- نویسندگان: Canh Nguyen,Huy Nguyen,Tan Ngo,Simone Maurea
- مشاهده