[en] Patients with diffusely increased uptake in both kidneys (often referred to as ''host kidneys'') on Tc-99m-MDP bone imaging were evaluated. Among 2056 patients reviewed, this finding was seen in 13 patients (0.63%): four with liver cirrhosis, two with lung cancer, one each with primary hepatoma, Hodgkin's disease, malignant lymphoma, thyroid cancer, leukemia, sideroblastic anemia and diabetes mellitus. Renal vascular disease and iron overload are considered to be the major causes of this finding

[en] A charged-particle imaging video monitor system was constructed and applied to video imaging of the position profile of PuO₂ particles on filter paper. The imaging video monitor system consists of a detector head, a silicon intensifier target (SIT) camera, a video frame memory, and a personal computer. The system can display the distribution image of PuO₂ particles becoming gradually clearer on a video monitor. The integrated image that is transferred to the computer is analyzed quantitatively for the radioactivity of each PuO₂ particle deposited on the filter paper. The system can not only rapidly distinguish PuO₂ particle contamination from Rn daughter products, but can also determine the size distribution of the PuO₂ particles

[en] Patient with diffusely increased uptake in both kidneys on sup(99m)Tc methylene diphosphonate (sup(99m)Tc)MDP) or sup(99m)Tc Hydroxy methylene diphosphonate (sup(99m)TcHMDP) bone scintigram were evaluated. Among 3017 patients, 19(0.63%) showed this finding. These 19 patients included six with liver cirrhosis (three with primary hepatoma), two with lung cancer, two with leukemia, four with other malignant diseases, three with diabetes mellitus and two with anemia. Vascular damage of the kidneys and iron overload are considered to be probable major causes producing this findings

[en] Wall thickness of fossil fuel firing power boiler tubes are measured by ultrasonic test at regular intervals as part of in-service inspections. The measuring tubes are located high up on the boiler and at restricted sites, and many man-hours are required for preparatory of boiler tube wall thickness scale removal. To improve the efficiency and reliability of boiler tube wall thickness measurements, a system was developed for measuring the tube wall thickness by ultrasonic test from inside the tube. The primary features of this system are: 1) polishing on the outersurface of boiler tubes is not necessary because measurements are made from inside. (Reduction of man-hours), 2) measurements in limited places where manual measurement is difficult or impossible is made possible because automatic measurement from inside the tube is made by an ultrasonic probe introduced into the tube from the inspection hole of the header. (Improvement of reliability), and 3) the tube wall thickness is measured by a submerged ultrasonic rotary probe at an accuracy of ±0.1 mm along the full length. (Improvement of reliability)

[en] First wall of tokamak fusion experimental reactors has a high possibility of damage caused by high surface heat flux and particle loads during normal and off-normal operation. Also, it is subjected to large electromagnetic loads due to plasma disruption. Because of theses high potential risks, the first wall needs to be replaced in case of failure, though the blanket is expected to survive anticipated design load conditions under the operation environments through its lifetime and classified into open-quotes semi-permanent componentsclose quotes. The first wall mechanically separated from the massive blanket structure has been proposed as a promising concept with the following advantageous features; - easy handling during assembly/disassembly due to light weight (-500 kg) - short down-time for maintenance operation - minimized amount of radwaste - reduced thermal stresses of massive blanket structure separated from high heat flux component - possible higher temperature operation of the first wall than the blanket structure. From these points of view, a separate first wall, which has a reliable double-walled thin shell structure with mesh insert for fail-safe feature, has been proposed for the first wall of fusion experimental reactors to improve its reliability, maintainability and inspectability. The quilting structure of austenitic stainless steel (SS316) cooled by low to medium pressure water is employed to accommodate high temperature operation of more than 300 degrees C with reduced thermal stresses under high surface heat flux of more than 0.3 MW/m² and nuclear heating. This structure is effective to obtain electrical connection between adjacent blanket modules and also workable as bumper limiters, start-up limiters and ripple-loss protectors with adequate armors or coating

[en] The basic performance tests of the full scale model of the blanket module were successfully completed in 1998 on the Blanket Test Platform constructed at Tokai JAERI. A rail-mounted vehicle system has been developed (the article contains 2 photos) to handle the heavy blanket module within the limited space and with the required precision

[en] To improve the tumor-to-blood ratio in ⁶⁷Ga tumor imaging, the effect of administration of deferoxamine mesylate (DFO) was evaluated. DFO improved ⁶⁷Ga tumor-to-blood ratios in tumor-bearing rats. Adminsitration of DFO 12 h after ⁶⁷Ga injection did not decrease the concentration of radioactivity in the tumor of rats, but administration of DFO 4 h after ⁶⁷Ga decreased the concentration of radioactivity in the tumor. Serum unsaturated iron binding capacity in rats was transiently increased by DFO administration, but when DFO was administered before ⁶⁷Ga injection the tumor uptake showed rather decreased levels. In human studies, DFO accelerated the excretion of ⁶⁷Ga from the blood, but tumor images were not necessarily improved. (orig.)

[en] The sine-Gordon model on the half-line with a dynamical boundary introduced by Delius and one of the authors is considered at quantum level. Classical boundary conditions associated with classical integrability are shown to be preserved at quantum level too. Non-local conserved charges are constructed explicitly in terms of the field and boundary operators. We solve the intertwining equation associated with a certain coideal subalgebra of U_q(sl₂-bar) generated by these non-local charges. The corresponding solution is shown to satisfy quantum boundary Yang-Baxter equations. Up to an exact relation between the quantization length of the boundary quantum mechanical system and the sine-Gordon coupling constant, we conjecture the soliton/antisoliton reflection matrix and bound states reflection matrices. The structure of the boundary state is then considered, and shown to be divided in two sectors. Also, depending on the sine-Gordon coupling constant a finite set of boundary bound states are identified. Taking the analytic continuation of the coupling, the corresponding boundary sinh-Gordon model is briefly discussed. In particular, the particle reflection factor enjoys weak-strong coupling duality

[en] A conceptual biologic model was developed and used to analyze the behavior of ¹²³I-Lym-1 monoclonal antibody against African human B cell lymphoma in patients with B cell lymphoma. Originally, the observed data could not be simulated with parameters for homologous immunoglobulins reported in the literature because of a major processor that was capable of distinguishing this murine immunoglobulin from the patient's own immunoglobulins. With a nonlinear parametric model, the data observed in patients could be fitted to the model. The nonlinear parameter determined the transfer of antibody from the intravascular to a processor compartment, primarily the liver. This transfer was a function of the number of free receptors in the processor. Model simulated curves for the time course of concentration of antibody in the blood for different amounts of injected antibody revealed that blood clearance of radiolabeled antibody was profoundly decreased by increased amount of injected antibody. This model provides an explanation for the observations that tumor imaging is improved with injection of larger amounts of antibody, and a basis for modifying the pharmacokinetic behavior of an antibody in order to optimize radioimmunodiagnosis and radioimmunotherapy

No abstract available