Biomedical subjects

V R Narra

Publications and source records attributed to V R Narra.

20 records · Page 2Linked to original sources

PubMed1989

In-vivo radiotoxicity of DNA-incorporated 125I compared with that of densely ionising alpha-particles.

When the atomic nucleus of 125I decays by orbital electron capture followed by internal conversion, numerous very-low-energy electrons (Auger electrons) are emitted, so that the energy density in the immediate vicinity of the decay site is extremely high. 125I incorporated into DNA was as effective as densely ionising 5.3 MeV alpha-particles from 210Po in reducing the sperm-head population in mice. Hence the biological risks of Auger-electron emitting radionuclides widely used in biology and medicine ought to be reassessed.

Animals↗

PubMedDate not supplied

Giant cell tumor of the tendon sheath in the ankle: MRI with pathologic correlation.

We report a case of Giant cell tumor of the tendon sheath involving the ankle, wherein spin-echo (T1- and T2-weighted), gradient-echo, and dynamic contrast-enhanced sequences were performed, and the tumor was noted to be very vascular. To the best of our knowledge, the use of gradient-echo sequences and the pattern of enhancement by time-intensity curves has not been reported earlier.

Adult↗