The purpose of this work was to improve of the spatial resolution of a whole-body positron
emission tomography (PET) system for experimental studies of small animals by incorporation …

A method for the quantitative evaluation of function curves is described. Factor analysis is
used to extract from a curve a few parameters which will characterise the curve in detail. The …

Noise propagation in iterative reconstruction can be reduced by exact data projection. This
can be done by area-weighted projection using the convolution method. Large arrays have to …

A number of iterative image reconstruction algorithms were integrated into one formula
characterizing each algorithm by only two parameters: overrelaxation and number of subsets. …

An iterative image reconstruction procedure is described which is able to calculate high-precision
images within eight iterative steps. High initial overrelaxation parameters are used …

METHODS We report on 76 patients referred for hippurate scin tigraphy because of
hypertension. For inclusion in the study, patients had to have a minimum systolic blood

Functional omicron-iodohippurate scintigrams were obtained in 18 hypertensive patients.
Each patient was examined in the prone position and during exercise. An exercise-induced …

An exercise-mediated renal omicron-iodohippurate transport abnormality was recently
identified in patients with hypertension. The disturbance was not observed in normotensive …

MATERIALS AND METHODS Seventy hypertensive patients with renovascular disease had
resting and exercise renography. All patients had renovascular disease, demonstrated by …

METHOD Twenty-three patients, referred for evaluation of renovascular hypertension, and 7
normotensive controls were studied. The control group included only healthy normotensive …