Johan Helland

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Seventy-five patients participated in a randomized, double-blind, crossover study, the aim of which was to compare the efficacy and safety of naproxen 1000 mg once daily with piroxicam 20 mg once daily for the treatment of osteoarthritis of hip or knee. Treatment periods of 4 weeks each were preceded by placebo wash-out periods of up to 1 week. The patients(More)
Results are presented from the tuning of the first section of the Biomedical Channel at LAMPF; the work centers about the use of the third bending magnet as a magnetic spectrometer. The momentum resolution at the intermediate focus is given in detail. The performance of a wedge degrader that compresses the wide momentum acceptance of the first section is(More)
Irradiation of humans with negative pions requires a knowledge of the absorbed dose and radiation quality outside the primary pion beam. In conjunction with early clinical trials at LAMPF, experimental data have been obtained with microdosimetric techniques and multiwire proportional counters. Theoretical calculations have been made for the neutron(More)
An automated data-acquisition and analysis system has been developed for dosimetry measurements on the pion therapy beam at the Clinton P. Anderson Meson Physics Facility Biomedical Channel in Los Alamos using a PDP-11/45 computer and CAMAC interface. Initialization, test, and monitor programs allow the user to set the physical limits of scanner travel,(More)
Lineal energy distributions and linear energy transfer (LET) spectra are being measured at the biomedical facility of the Los Alamos Scientific Laboratory for a negative pion beam having an initial momentum of 168 MeV/c. The results show that the fraction of the dose for lineal energies greater than 50 keV/mum is approximately 2% in the plateau and(More)
1. Poor and Limited Research Obviously, development studies have become unfashionable -– even in the richest of the three Scandinavian countries that used to be in the forefront of enlightened support and solidarity with downtrodden people in the South. In Forum for Development Studies No. 2, 2001, for instance, the author of a commissioned report to the(More)
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