An expression for the expected image of a spherical tumour in a uniform background was
derived in terms of background thickness and concentration of radioactivity, the tumour size …

A simple descriptive model of the mental processes involved in the visualisation of count
density variations in radioisotope scanning displays is proposed in which an area of interest …

Statistical tests used by various authors have yielded dissimilar values of statistical index n
for the threshold detection of small abnormalities in radioisotope concentrations (n= 2.5 to 3 …

A method for the analysis of radionuclide (197Hg chlormerodrin) brain scans is described.
Lateral scans have been compared area for area with a mean pattern derived from the …

Predicting the recognition of marginally detectable abnormalities in scintigrams by the
physician is a key weakness in our present capability for evaluating the effectiveness of …

The effect of the size of an abnormality on its detectability was measured. The cylindrical
abnormalities studied, with diameters ranging from 3 mm to 4 cm, were superimposed on a …

The type of display considered here is one which is commonly used with gamma cameras,
namely that in which each gamma photon detected by the gamma camera is shown as a …

The radionuclide imaging process appears to be simple: this is deceptive because it is a
synthesis of many complex processes. Surveys of the process have been presented by the …

DISCLAIMER Portions of this document may be illegible in electronic image products.
Images are produced from the best available original document. concerned with peripheral …

The primary γ-ray flux from area and volume sources incident on the detection surface of
different types of scanning systems is calculated. The modifications of the γ-ray flux into …