Rubidium-82: positron emission

Fig. 2.1 Normal myocardial perfusion by positron emission tomography using Rubidium ( Rb) at rest and after dipyridamole stress in 3D views. Coronary arterial...

The radioactive isotope rubidium 82—another photon emitter—is also finding a useful niche in diagnostic medicine. As the tracer in PET (positron emission tomography) scans, rubidium is cheaper than the more commonly used ammonia, which must be produced in a particle accelerator. Combined with a CTscan that helps visualize blood flow, this method is currently the most accurate when imaging blood flow restrictions that may lead to cardiac arrest. 

Mespiperone C 11 injection Methionine C 11 injection Raclopride C 11 injection Rose Bengal sodium I 131 injection Rubidium chloride Rh 82 injection Radioactivity (general monograph) Radiopharmaceuticals for positron emission tomography compounding Samarium Sm 153 lexidronam injection... 

Write balanced nuclear equations for the following processes (a) rubidium-90 undergoes beta emission (b) selenium-72 undergoes electron capture (c) krypton-76 undergoes positron emission (d) radium-226 emits alpha radiation. 

Rubidium-87, a beta emitter, is the product of positron emission. Identify... 

The isotopes of rubidium have been of value in medicine for over two decades as tracers for coronary collated and renal blood flow tests [8,9]. More recently, they have been used with noninvasive positron emission tomography to evaluate brain function [10] and in similar studies of heart and brain [11,12]. 

Rubidium-79 decays by positron emission and forms krypton-79, which is a gas. A weighed 100.00-mg sample of solid rubidium-79 was allowed to decay for 42 minutes, then weighed again. Its mass was 25.00 mg. What is the half-life of rubidium-79 ... 

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