Exploration and practice of the blended teaching model based on BOPPPS classroom reconstruction in Diagnostic Radiology / 中华医学教育探索杂志

Objective:To investigate the feasibility and effectiveness of the blended teaching model for diagnostic radiology based on BOPPPS classroom reconstruction, i.e., bridge-in, objective, pre-assessment, participatory-learning, post-assessment, and summary.Methods:The undergraduate students in the classes of 2017 and 2018 in Department of Medical Imaging were selected as research subjects. The students in the class of 2018 were established as observation group and received the innovative blended teaching model based on BOPPPS classroom reconstruction, and those in the class of 2017 were established as control group and received teaching with traditional theoretical lectures. At the end of the course, 80 students were randomly selected from the observation group and the control group for performance analysis and teaching evaluation. SPSS 26.0 was used to perform the t-test. Results:The observation group had a total score of (82.66±6.18), while the control group had a total score of (76.47±5.42), and compared with the control group, the observation group had significantly higher scores of homework score, course discussion, and final examination ( P<0.05). Compared with the control group, the observation group had significantly higher scores of "understanding of the basic knowledge of imaging", "improvement of comprehensive diagnostic thinking ability", "stimulating the interest in learning and expanding horizons", and "cultivating clinical competence" in the self-evaluation survey ( P<0.05). Conclusion:The blended teaching model based on BOPPPS classroom reconstruction is suitable for the teaching of radiology diagnostics. It not only enriches teaching means and methods and enhances classroom participation and interaction, but also expands teaching space and teaching content.

Comparación de la reproducibilidad en las mediciones angulares entre trazado manual y computarizado / A comparison of angle measure reproducibility between manual and computerized tracing

INTRODUCCIÓN: las cefalometrías digitales permiten controlar los errores que se generan en el trazo manual, por eso el propósito de este estudio fue evaluar la reproducibilidad y precisión de las medidas angulares entre un trazo manual y el obtenido con el programa Cephapoint en una radiografía digital. MÉTODOS: se utilizaron 11 radiografías digitales directas tomadas a estudiantes de ortodoncia, las cuales se introdujeron en el programa Cephapoint. Se hizo la medición de 9 ángulos, cada uno medido en la radiográfia digital de manera manual y en el programa Cephapoint. Todas las medidas fueron hechas por 3 operadores con intervalo de 1 semana. Se halló el promedio de error interobservador para medir la reproducibilidad de cada medida angular, y el promedio de error intraobservador para determinar la precisión de cada observador. RESULTADOS: : el ángulo FH/N/Pg tuvo la menor diferencia en el error interobservador (0,10°) en ambos métodos, favoreciendo el trazado manual. Mientras que los ángulos con menor diferencia de error interobservador en el trazado computarizado fueron: II-NB (0,11°) y N-A/Pg (0,11°). La reproducibilidad intraobservador mostró un Coeficiente de Correlación Intraclase (CCI), excelente para ambos métodos. CONCLUSIONES: la reproducibilidad de las medidas angulares con el trazado manual y computarizado no presentó diferencias significativas. De acuerdo a los hallazgos de este estudio, los métodos evaluados brindan igual validez diagnóstica.

INTRODUCTION: digital cephalometry allows handling errors produced during manual tracing; the purpose of this study was therefore to evaluate the reproducibility and precision of angle measures between manual tracing and that obtained with Cephapoint in digital radiography. METHODS: 11 direct digital radiographs taken to orthodontics students were introduced in the Cephapoint computer program. 9 angles were measured in both hand-tracing digital radiography and Cephapoint. All measurements were made by 3 operators with 1-week interval. We calculated the average interobserver error to find the reproducibility of each angle measure, and the average intra-observer error to determine the accuracy of each observer. RESULTS: : the FH/N/Pg angle showed the smallest interobserver error difference (0.10°) in both methods, favoring manual tracing. On the other hand, the angles with the smallest inter-observer error difference in computerized tracing were LI-NB (0.11°) and N-A/Pg (0.11°). Intraobserver reproducibility showed excellent Intraclass Correlation Coefficient (ICC) in both methods. CONCLUSIONS: reproducibility of angular measurements did not show significant differences between manual and computerized tracing. According to the findings of this study, the methods under evaluation offer equal diagnostic validity.

Study of SIVP Improving Detectable Rate of Hepatocarcinoma in Cirrhosis / 实用放射学杂志

Objective To study the clinical applications of SIVP detecting hepatocarcinoma in cirrhosis.Methods 40 cases of cirrhosis combined with hepatocarcinoma diagnosed by operation and pathology were collected.Control group were scaned with conventional technique,experimental group were scaned with SIVP.Results Only 5 cases catched the optimal scan timing in control group,the accuracy of diagnosis in hepatocarcinoma was 70%;All the cases found the optimal scan timing in experimental group,the detectable rate of hepatocarcinoma was 95%.Conclusion SIVP can find out the optimal timing,which greatly improved accuracy of diagnosing hepatocarcinoma in cirrhosis.