Biomedical subjects

R D Lopes

Publications and source records attributed to R D Lopes.

3 recordsLinked to original sources

PubMed2001

Interactive stereoscopic full-color direct volume visualization for virtual reality applications in medicine.

Only recently, advanced direct volume visualization techniques have been widely used due to the availability of low cost hardware accelerators; such techniques have a great potential of use for many applications of the virtual reality in medicine. We proposed and implemented a low cost system for interactive and stereoscopic 3D visualization of the full color visible human dataset. Potential use of the proposed system includes anatomical atlases and surgical simulators. A prototype of the proposed system is rendering full color volumes with 256 x 152 x 470 in real time (15-20 Hz) with stereoscopy.

Anatomy, Cross-Sectional↗

PubMed2001

A virtual reality simulator for bone marrow harvest for pediatric transplant.

Bone marrow transplant is a relatively new procedure to treat recently considered incurable diseases. One important part of the procedure is the process of harvesting the donor bone marrow. We are developing a virtual reality simulator for bone marrow harvest that integrates interactive stereo visualization and force feedback techniques. The main objective is to offer a low cost virtual reality system to boost current adopted training methodologies for bone marrow harvesting.

Bone Marrow Transplantation↗

PubMedDate not supplied

[Histomorphometric study of cardiomyocytes of the left ventricle of pregnant albino rats].

PURPOSE: In the present study we evaluated, by light microscopy, and throughout morphometry, whether hypertrophy of cardiac striated muscular fibers of left ventricular occur in albino rat, during pregnancy. METHODS: After maiting, 12 nuliparous rats were divided into four groups with three animals for each group. The female rats corresponding to each group were killed at 1st, 7th, 14th and 21st days of pregnancy. RESULTS: Observation, on light microscopy (H.E) had at one view, did not display any alterations during pregnancy. However, the morphometry revealed that nuclei of cardiomyocytes are augmented in volume at 14th day of pregnancy and statistically significant data show the hypertrophy. CONCLUSION: The obtained data show the existence of a dinamic and reversible process of ventricular remodelling in consequence of adaptation physiological alterations of the cardiovascular normal pregnancy.

Animals↗