Showing papers on "Parametric Image published in 1985"
TL;DR: The EM Parametric Image Reconstruction Algorithm (EMIR) as mentioned in this paper is a Parametric image reconstruction algorithm for image reconstruction that is based on the EM Parameterized Image Reconstruction (EMPI) algorithm.
Abstract: (1985). Comment: The EM Parametric Image Reconstruction Algorithm. Journal of the American Statistical Association: Vol. 80, No. 389, pp. 20-22.
115 citations
TL;DR: The study allowed us to conclude that for the detection and the quantitation of esophageal transit the method of choice was the combined use of the condensed image and the pixel to pixel mean time image.
Abstract: The aim of this work was to compare the advantages and the limitations of several data processing techniques for the assessment of esophageal transit. The following qualitative methods were evaluated: (a) scintigraphic image, (b) cine-display, (c) regional time-activity curve, and (d) condensed image. The quantitative methods evaluated were the pixel to pixel presentation of (a) parameters of the time-activity curves such as time of arrival, time to maximum, and several downslope parameters, (b) mean transit time, (c) mean time, and (d) a new transit parameter based on the radioactive decay. The study allowed us to conclude that for the detection and the quantitation of esophageal transit the method of choice was the combined use of the condensed image and the pixel to pixel mean time image. The parametric image using the transit parameter calculated from decay was shown as a valuable alternative if an ultra-short half-life radionuclide was used as the tracer.
27 citations
TL;DR: An existing technique for the presentation of oesophageal transit studies has been further developed and applied to conventional radionuclide data, resulting in a parametric image that is particularly useful for depicting the complex motion of a fragmented bolus.
Abstract: An existing technique for the presentation of oesophageal transit studies has been further developed and applied to conventional radionuclide data. The spatial and temporal information contained in the original dynamic study is compressed to a single image, showing the linear distribution of activity down the oesophagus throughout the study. This parametric image contains all the useful information concerning the motion of the bolus, and is particularly useful for depicting the complex motion of a fragmented bolus. The technique has been shown to be of value in patients with a variety of oesophageal disorders.
12 citations
TL;DR: It is shown that parametric images can be quantified and objectively compared in this way and the algorithm has been implemented to analyze renal studies.
Abstract: A new method is described that modifies the original concept of parametric or functional imaging. While the conventional parametric image replaces a temporal sequence of images with a single static image based upon a selected parameter, in the new approach fixed zonal areas and bands are established within the imaged organ, and the mean value for each zone is computed. It is shown that parametric images can be quantified and objectively compared in this way. The algorithm has been implemented to analyze renal studies.