The microplate format has become increasingly popular in biological experimentation due to its small size, easy sample handling, increased throughput, decreased sample preparation, and small sample volume. The need to perform increasing numbers of assays has sparked interest in high throughput, microplate compatible radioisotope counters. Many of these biological experiments are performed on gl...

A miniature scintillation detector recently designed and constructed in this laboratory can be inserted into the esophagus and under fluoroscopic vision positioned so that radioactivity emitted from the blood in the descending aorta can be detected and a time-concentration curve recorded from which cardiac output can be determined. Twenty simultaneous determinations of cardiac output by the iso...

The depth distributions of the gamma emitting nuclides, H-3 and C-14 activities were characterized for the activated biological shielding concrete from a decommissioning of Korea Research Reactor-2(TRIGA Mark) by using a commercially available tube furnace and a liquid scintillation counter. The HTO vapor and CO2 gas generated from the tube furnace were trapped in HNO3 and Carbosorb bubbler, re...

The thyroid uptake at 20 minutes of intravenously administered Technetium-99(m) ((99m)Tc) was measured in 117 patients with a standard scintillation counter. Patients were divided into three groups on the basis of clinical assessment, four-hour (131)I uptake, triiodothyronine (T-3) resin uptake, and protein-bound iodine measurements.In 31 patients with no evidence of thyroid disease the mean (9...

To measure regional cerebral blood flow (rCBF) by blood sampling using 99mTc-ECD we devised a method of measuring the radioactive concentration in arterial blood sample with a gamma camera. In this method the head and a blood sample are placed within the same visual field to record the SPECT data of both specimens simultaneously. The results of an evaluation of the counting rate performance, ap...

We have been developing a plastic scintillation counter for the WASA detector. The performance of with Multi-Pixel Photon Counter (MPPC) readout has systematically investigated minimum ionizing particles in terms time resolution and signal amplitude stability. was evaluated under various incident conditions 2.5 GeV/c proton beams different MPPC settings. A scintillator size 550×38×8mm3 opticall...