Filling defects are often observed on 99mTc sulfur colloid liver scans. Hot spots are much less frequently seen. Superior vena cava syndrome is the most frequent cause of this finding. In this report 3 patients with S.V.C and budd - Chiari syndrome with HOT SPOT on liver scan are presented. Mechanisms of scintigraphic patterns are reviewed.

Recent work on the automatic generation of frame axioms from action specifications that have complete fluent change specifications is extended to extract action invariants. An action invariant expresses a property that is preserved by all actions of that class. The extraction is achieved by combining automatically generated frame axioms and the original action axioms relativised to those states...

rate of perinatal HIV transmission and to be beneficial in treating early HIV infection. However, the implications of these results for postexposure prophylaxis are uncertain. The short-term toxicity of ZDV in HCWs primarily has been gastrointestinal discomfort and fatigue. In 1990, the Public Health Service (PHS) concluded that a recommendation could not be made for or against the use of ZDV p...

Let A be a Banach algebra. The flip on A ⊗ A is defined through A ⊗ A ∋ a⊗ b 7→ b⊗ a. If A is ultraprime, El(A), the algebra of all elementary operators on A, can be algebraically identified with A ⊗ A, so that the flip is well defined on El(A). We show that the flip on El(A) is discontinuous if A = K(E) for a reflexive Banach space E with the approximation property.

Daily precipitation data from climate change simulations using the latest generation of coupled climate system models are analyzed for potential future changes in precipitation characteristics. For the Intergovernmental Panel on Climate Change (IPCC) Special Report on Emissions Scenarios (SRES) B1 (a low projection), A1B (a medium projection), and A2 (a high projection) during the twenty-first ...