A versatile, high-contrast photoscanner for the localization of human tumors with radioisotopes

The Fate of Intravenously Injected Radiogold Adsorbed onto Carbon Particles and its Possible Applications

“…Lastly, radioisotope photoscanning of the lungs was performed for 11 dogs under neumbetal anesthesia by means of a photoscanner built according to the principles described by Bender (2) and containing a 3 X 2 inches crystal. The collimator used was either a straight bore half inch or 7 holes foccusing collimator.…”

Medical Radioisotope Scanning

“…The system is very versatile in skilled hands but the danger is that when used a t a high contrast setting, stat'istical fluctuations will be emphasized and the latitude of exposure is small. Methods of improving the lat'itude have been devised by Paul and Xorley (1964) and Bodforss (1964) who use three layers of film and Bender a'nd Blau (1959) who view a low contrast photoscan wit'h a closed-circuit television system.…”

“…Recent examples of this t-ype of stationary detector scanner are those of Gross, Schlesinger and de Boves (1964), and the auto-fluoroscope of Bender andBlau (1963) andBender (1964). The latter consists of a matrix of 293 crystals, 2 in.…”

“…are each viewed at depths of 0, 5 , 10 and 15 cm. Bender and Blau (1964) used the I.A.E.A. phantom for a collimator and isotope comparison and whilst they showed quite clearly that resolution is not an important factor in detecting the spherical tumours used, the maximum detection was obtained for both deep and superficial tumours a t energies of about 300 kev.…”

Ein empfindliches Verfahren zum Nachweis von Schilddrüsenmalignommetastasen mit J131

“…Die meßtechnische Entwicklung für diesen Aufgabenbereich führte in den letzten Jahren zu Vorschlägen, nach denen es möglich ist, die Untergrundstrahlung zu subtrahieren und bei einigen Methoden auch eine Kontraststeigerung zu erzielen (8,9,10,11,12,13). Mit diesen Verfahren ist jedoch im allgemeinen kein kontrastreiches Szintigramm bei direkter Aufzeichnung zu erhalten, wenn die nachzuweisende Strahlung nur wenig über dem Null-Effekt liegt.…”