جستجوی مقالات مرتبط با کلیدواژه "focus" در نشریات گروه "پزشکی"

To analyse the signs of malignant tumours in breast magnetic resonance imaging (MRI) and further improve the imaging diagnosis level of malignant breast tumours. The plain and enhanced MRI data of 60 patients who visited our hospital between January 2011 and January 2021 were analysed retrospectively, with 118 lesions in total. Malignant breast tumour signs were assessed. A total of 96 lesions were pathologically confirmed as breast cancer, with 76 cases of single breast and single lesion, 10 cases of double breast and single lesion, 6 cases of single breast and two lesions, and 4 cases of single breast and three lesions. Regarding morphology, 58 lesions were regular in appearance and 60 were irregular, of which 50 had a burr sign or sharp angle sign. Strengthening methods included 52 cases of homogeneous strengthening, 3 of annular strengthening and 2 of cluster strengthening. A burr margin, local skin thickening, depression, adhesion and axillary lymph node enlargement are reliable MRI signs of breast cancer. When combined with Breast Imaging Reporting and Data System grading, these signs can effectively differentiate between benign and malignant breast tumours and constitute a key reference value for the diagnosis of breast cancer.

The aim of this study was to investigate the effects of focusing instructions (internal and external) and attention feedback (internal and external) on learning free throwing skills of basketball in children aged 9 to 11 years.
For this purpose, 70 female students aged 9 to 11 years were selected from District 18 of Tehran and randomly divided into five groups of 14 individuals, including one Control Group (CG), along with four Experimental Groups (EGs) of Internal Attention (EG 1), External Attention (EG 2), Internal attention feedback (EG 3), and External attention feedback (EG 4). After learning some basic instructions and watching the instructional video, the pre-test was performed including a 10-item set (10 blocks). The acquisition phase consisted of two sessions on two consecutive days and each session consisted of 5 blocks of 10 attempts with two minutes of rest between the blocks. Immediate retention test was performed immediately after the acquisition phase and delayed retention test was conducted 48 hours after the last acquisition session. Data analysis was performed using repeated measures one-way Analysis of Covariance (ANCOVA), and LSD post hoc test using SPSS software version 20 and Excel at a significant level of P <0.05.
The findings revealed that both attention-grabbing methods improved children's motor functions (P <0.05). In combination of data related to internal and external attention as well as external and internal attention feedback, the findings showed that there were significant differences between the effects of interventions on children's motor skills learning, to the advantage of the external attention feedback (P <0.05).
The present findings in support of the hypothesis of limited practice in order to learn the motor skills of children's basketball free throwing, recommend the use of feedback and attention signs, especially the external ones.