conclusion we constructed and validated a ct colonography phantom with correct density allowing performance of reproducible experiments. materials and methods we found 15 different phantom designs by literature search and compared their advantages and disadvantages based on their description and images. we tested various materials for density and mechanical properties and constructed a phantom ...

primary pleuropulmonary synovial sarcomas are rare soft tissue malignancies; combined metastatic involvement of the heart is extremely rare. in this case report, a 17-year-old female presented with a history of chest pain. chest radiographs revealed a round mass in the left upper hemithorax, and computed tomography (ct) showed a well-defined heterogeneous enhancing mass abutting the pleura. a c...

thrombophilia increases the incidence of pulmonary thrombosis significantly. various hereditary and acquired factors are known for thromboembolism. the hereditary factors are two common genetic autosomal mutations including factor v leidan mutation and prothrombin gene mutation. a descriptive- analytical design was conducted on 60 patients with thromboembolism who met the inclusion criteria. tw...

objectives: this study aimed to assess the effect of voxel size and object location in the field of view (fov) on diagnostic accuracy of cone beam computed tomography (cbct) for detection of simulated bone defects. materials and methods: in this in vitro study, bone defects were drilled in four sections of a dry human mandible. bone blocks were fixed on a platform parallel to the horizontal pla...

errors and variations in interpretation can happen in clinical imaging. few studies have examined the biased effect of clinical information on reporting of brain ct scans. in a blinded double crossover design, we studied whether three radiologists were biased by clinical information when making ct scan diagnosis of the brain. three consultant radiologists in three rounds with at least a one-mon...

conceptually traumatic brain injury (tbi) can be classified from a mechanistic perspective as: 1) closed, 2) penetrating, 3) blast, and 4) crush injuries. thus, tbi is a heterogeneous disease and each type of brain injury has different characteristic features often necessitating different approaches to management. the first edition of the guidelines for management and prognosis of penetrating b...

Computational thinking (CT) is a key 21st-century skill. This paper contributes to CT research by investigating predictors among upper secondary students in longitudinal and natural classroom setting. The hypothesized are grouped into three areas: student characteristics, home environment, learning opportunities. measured with the Thinking Test (CTt), an established performance test. N = 202 hi...

OBJECTIVE To compare effects of the Cooking With Kids (CWK) cooking and tasting curriculum (CWK-CT) with a less-intense, tasting-only curriculum (CWK-T) and to conduct a non-treatment comparison on fourth graders' cooking self-efficacy (SE), cooking attitudes (AT), and fruit and vegetable preferences (FVP). DESIGN Pre-post, quasi-experimental, 2 cohorts. SETTING Eleven low-income public sch...

BACKGROUND AND PURPOSE Loss of psychic self-activation has been described after bilateral lesions to the globus pallidus, striatum, and white matter of the frontal lobes, but it is a very rare sign of bithalamic lesions. The exact functional-anatomic mechanism underlying loss of psychic self-activation following bithalamic lesions remains to be elucidated. CASE DESCRIPTION We present clinical...