Electrical power requirements for the next generation of deep space missions cover a wide range from the kilowatt to the milliwatt. Several of these missions call for the development of compact, low weight, long life, rugged power sources capable of delivering a few milliwatts up to a couple of watts while operating in harsh environments. Advanced solid state thermoelectric microdevices combine...

Two simple, on-llne radloactlvlty detectors for Capillary electrophoreds are descrtbed. The first caplllary electrophoresls/radioisotope detector system utlllres a commerclally available semlcMKhtctor devloe, which is positioned external to the Separation channel and whlch responds dlrectly to lmpkrshrs y or hlgh-energy @ radlatlon. The second caplllary electrophoreds/radtope detector uttllzes ...

Radioisotopes are natural clocks which can be used to estimate the age of the solar system and of the Universe (see e.g. Takahashi 1998; Chen & Tilton 1976; see also the recent review by Arnould & Takahashi 1999). They are responsible for the steady decline of the light curves of supernovae (see e.g. Diehl & Timmes 1998, and references therein). The diffuse emission at 1.8 MeV from the decay of...

The same general techniques were used in both the canine and human studies. Intravenously administered rose bengal 1131 was administered to dogs in a dose of 50 microcuries and to patients in a dose of 150 microcuries; scans were obtained at 5 minutes. In the canine experiments employing gold, 50 microcuries of Aulg8 were used with scanning at 15 minutes; in 2 adult human beings 200 microcuries...

Radioisotope angiocardiography was performed by peripheral venous or pulmonary arterial injection of 99mTc pertechnetate in 64 patients with acute myocardial infarction. End-diastolic volume determined with this technic averaged 101 + 7 (+ SEM) ml/m2 and was elevated (>90 ml/m2) in 47 patients. Initial ejection fraction (EF) averaged 0.38 + 0.03 and was reduced (<0.52) in 58 patients. The exten...

BACKGROUND Intrathecal baclofen infusion is an established method for the treatment of generalized and disabling spasticity. The most frequent technical problems are due to catheter /pump disconnections, but diagnosis of dysfunction may be difficult. CASE REPORT We report here the case of a 53-year-old woman with spastic paraplegia treated with intrathecal baclofen. Spasticity remained uncont...

Radioisotope angiocardiography was performed by peripheral venous or pulmonary arterial injection of 99mTc pertechnetate in 64 patients with acute myocardial infarction. End-diastolic volume determined with this technic averaged 101 + 7 (+ SEM) ml/m2 and was elevated (>90 ml/m2) in 47 patients. Initial ejection fraction (EF) averaged 0.38 + 0.03 and was reduced (<0.52) in 58 patients. The exten...

INTRODUCTION L,L-ethylenedicysteine (EC) is a new carrier of technetium Tc 99m (99mTc) with a lower affinity to plasma albumin in comparison with diethylenetriamine pentaacetic acid (DTPA). We compared 99mTc-EC scan with 99mTc-DTPA scan in diuretic renography for patients with obstructive uropathy. MATERIALS AND METHODS Thirty-three patients with upper urinary tract obstruction were randomly ...

24Na is a beta and gamma emitting radioisotope that widely used in medical engineering fields. It often radiotracing. This with half-life of 15 hours mostly produced cyclotrons. The cross-section to obtain various data about the production radioisotope. In cases where it not possible experimental data, missing can be completed calculations obtained compared experimental, saving time, cost effor...

The conventional reaction yield evaluation for radioisotope production is not sufficient to set up the optimal conditions for producing radionuclide products of the desired radiochemical quality. Alternatively, the specific radioactivity (SA) assessment, dealing with the relationship between the affecting factors and the inherent properties of the target and impurities, offers a way to optimall...