Biomedical subjects

S Y Cho

Publications and source records attributed to S Y Cho.

201 records · Page 12Linked to original sources

PubMedDate not supplied

The visible man: three-dimensional interactive musculoskeletal anatomic atlas of the lower extremity.

A personal computer-based interactive musculoskeletal anatomic atlas of the lower extremity has been created by using the Visible Human Male data set. A semiautomatic segmentation program was developed by using an intelligent scissors approach and shape-based interpolation, thus considerably reducing the laborious work of the segmentation and labeling process. Manual contour extractions at 3-mm section intervals and shape-based interpolations of intervening sections of the musculoskeletal structures of the lower extremity were performed. For interactive and realistic three-dimensional display, an efficient binary volume rendering method was developed that introduces the concept of shear-warp factorization and applies a newly developed normal calculation technique. Binary volume rendering reconstructs various structures from a series of two-dimensional sections in a few seconds, thus enabling real-time manipulations of the computerized atlas. All of the muscles, tendons, and bones of the lower extremity have been segmented and labeled. The volume-based three-dimensional interactive atlas supports various interactions including rotation, removal, highlighting with artificial colors, arbitrary cutting operation, transparent view, and descriptive knowledge representation. In addition, browsing through the two-dimensional images of transverse, coronal, and sagittal views with labeling and segmentation information is possible.

Anatomy, Cross-Sectional↗

PubMedDate not supplied

Comparative evaluation of brain CT and ELISA in the diagnosis of neurocysticercosis.

This study compares the results of cysticercus-specific IgG antibody levels, as measured by enzyme-linked immunosorbent assay (ELISA), with brain CT findings in suspected neurocysticercosis and to assess the clinical significance of ELISA. One hundred twenty-three neurologic patients were examined by both brain CT and ELISA. Sensitivity and specificity of ELISA in confirmed cases were 94% and 91%, respectively. Patients with multiple cysts without enhancement on CT, which were thought to represent viable cysticerci, were positive by ELISA. Those with cysts with enhancement or poorly defined low densities or enhancing nodules, which represented cysticerci on degeneration, were also positive by ELISA. Those with multiple spotty calcifications, which represent cysticerci in the inactive stage, were negative by ELISA. Those with mixed CT findings of the above, which represent the various stages of infection in a patient, were positive by ELISA. Those with only enhancing nodules with surrounding edema, which were thought to be other inflammatory granulomas, were negative by ELISA. If patients with only hydrocephalus on CT are positive by ELISA, they can be confidently diagnosed as having ventricular cysticercosis. The results indicate that ELISA is useful as a complementary diagnostic tool, especially in patients with equivocal CT findings of neurocysticercosis. Provision of etiologic information on a biologic basis was the advantage of this serologic test.

Adolescent↗

PubMedDate not supplied

Effectiveness of electronic dental anesthesia for restorative care in children.

The effectiveness of electronic dental anesthesia (EDA) for pain control during restorative procedures was compared with local anesthetic injection (LA) in 32 children aged 6 to 12 years. Each child selected had two antimere primary or permanent molars requiring similar-sized Class I or Class II restorations. The pain levels during restorative treatment were assessed using a visual analogue scale. Heart rates and behavior were also recorded. A crossover design was used with each child acting as his/her own control. The results showed that overall, EDA was less effective than LA for cavity preparation. The reported pain scores for EDA were higher in permanent teeth for the deeper cavities, and with one of the operators. The pre- or post-treatment anxiety scores were not found to differ significantly between the two restorative appointments. However, children with the highest pretreatment scores were more likely to report higher pain scores with EDA. Despite this, 63% of the children preferred EDA to LA. Dental anxiety, cavity depth, the tooth being treated, and operator attitude may also be important factors in determining the success of EDA.

Anesthesia, Dental↗