[en] The Digital Camera approach will meet the present and future foreseeable needs of the Nuclear Medicine profession: Digital Imaging, fast Dynamic Studies, Three-Dimensional Reconstruction, and enhancement of low signal localization. The imaging computer itself has the potential to handle inputs from imaging devices other than nuclear detectors (Ultrasound, X-ray, etc.), providing the basis for an all digital imaging department
Source
Raynaud, C. (ed.); 322 p; ISBN 0-08-027-091-3; 
; 1982; v. 3 p. 2447-2449; Pergamon Press; Paris (France); 3. World congress of nuclear medicine and biology; Paris (France); 29 Aug - 2 Sep 1982
; 1982; v. 3 p. 2447-2449; Pergamon Press; Paris (France); 3. World congress of nuclear medicine and biology; Paris (France); 29 Aug - 2 Sep 1982
[en] A dual-channel scanning system has been described permitting the simultaneous imaging in individual color of the distribution of two gamma-emitting radioisotopes. In those cases where two organs are adjacent and concentrate the same isotope, they may be displayed in separate color if one of the organs concentrates another gamma-emitting isotope with a different energy. This is accomplished by individual color readout of this isotope and the display of the subtraction of this isotope from the common isotope in another color. By using two facing scintillation probes on either side of the individual being scanned, two overlapping organs at different depths concentrating the same isotope can be color differentiated by a dual-channel playout of each probe. The principal application of these dual-channel scanning methods to date has been the simultaneous display of the liver and pancreas in individual colors using 198Au and 75selenomethionine. Characteristic scans have been obtained which differentiate a number of disease states from the normal pancreas and liver. The pancreatic and liver diseases studied and characterized are carcinoma of the pancreas, pancreatic insufficiency, acute recurrent pancreatitis, pancreatic pseudocyst and Laennec's cirrhosis, hepatoma and metastatic malignancy in the liver. The uptake of 75selenomethionine in malignant lesions in many instances produces positive scans of these tumors in contrasting color to the liver. Depth discrimination in color with the two-probe system has permitted the lateralization of intracranial lesions, the color of the display being proportional to the depth of the lesion. The discrimination of depth and gamma-ray energy by dual-channel color scanning and its general application in visualizing other organs has been accomplished. (author)
Source
International Atomic Energy Agency, Vienna (Austria); 880 p; Jan 1969; p. 375-387; Symposium on Medical Radioisotope Scintigraphy; Salzburg (Austria); 6-15 Aug 1968; IAEA-SM--108/99; ISSN 0074-1884; ; 20 refs., 10 figs.
; 20 refs., 10 figs.
[en] The use of I125 as I125-iodide for scanning of the thyroid and of thyroid carcinoma métastasés and as I125-labelled Rose Bengal for scanning of the liver has been investigated in our laboratories. In some patients, the thyroid scans and the scans of thyroid carcinoma metastases were repeated with I131. The liver scans were repeated with colloidal Au198. Cold nodules in the thyroid which could not be detected with I131 were clearly seen with I125. Anterior métastasés in the lungs could be differentiated from posterior métastasés with I125, while with I131 this was not possible. Using the same doses of radioactivity the background with I131 was much higher and could not be eliminated, as this would have reduced the counting rate over the lesions to levels which could not be detected. Some of the photoscans and mechanical scans of livers carried out with colloidal Au198 could not be interpreted. However, ''cold'' lesions were clearly seen on the scans of the same livers with I125-labelled Rose Bengal. (author)
[fr]
Les auteurs ont étudié dans leur aboratoire l'emploi de 125I sous forme d'iodure pour la gammagiaphie de la thyroïde et des métastases de carcinomes thyroïdiens, ainsi que l'utilisation du rose bengale marqué avec 125I pour la gammagraphie du foie. Chez certains sujets, les scintigrammes de la thyroïde et des métastases de carcinomes thyroïdiens ont été refaits avec 131I. De leur côté, les scintigrammes du foie ont été refaits avec de l'or-198 colloidal. Les abcès froids thyroïdiens qui n’étaient pas détectés avec 134 devenaient nettement visibles avec 125I; de même, 125I permettait de distinguer les métastases antérieures des métastases postérieures des poumons, alors que cette distinction n'était pas possible avec 131I. Pour les mêmes doses de radioactivité, le bruit de fond était beaucoup plus élevé avec 131I et ne pouvait pas être éliminé, car cela eût ramené l'intensité au-dessus des lésions à des niveaux impossibles à detecter. Plusieurs photo-scintigrammes et mécanogrammes obtenus au moyen de Vor-198 colloïdal n'ont pas pu être interprétés. En revanche, les scintigrammes des mêmes foies au moyen de rose bengale marqué avec 125I faisaient nettement apparaître les lésions «froides». (author)[es]
Los autores han estudiado en sus laboratorios el empleo de yoduro marcado con 125I, para explorar la tiroides, y las metástasis del cáncer de este órgano, y de Rosa Bengala, marcado también con 125I, para explorar el hígado. En algunos pacientes, la exploración de la tiroides y de las metástasis del cáncer tiroideo se repitió con 131I. Las exploraciones del hígado se volvieron a efectuar con 198Au coloidal. Los nodulos fríos de la tiroides que no se detectaron con 131I pudieron en cambio observarse claramente con 125I. Las metástasis pulmonares anteriores pudieron diferenciarse de las posteriores con 125I, lo que no fue posible con 131I. Para iguales dosis de radiactividad, el 131I dio una actividad de fondo mucho más elevada que no fue posible eliminar, ya que ello habría reducido a valores indétectables il índice de recuento en la zona de las lesiones. Los autores no pudieron interpretar los resultados de algunas de las fotoexploraciones y de las exploraciones hepáticas con impresión mecánica efectuadas mediante 198Au coloidal. Sin embargo, utilizando Rosa Bengala marcado con 125I pudieron observar claramente lesiones «frías» en centelleogramas de hígados ya explorados con otros productos. (author)[ru]
Izuchalos' ispol'zovanie joda-125 v forme iodida, mechennogo jodom-125, dlja skennirovanija shhitovidnoj zhelezy i metastazov raka shhitovidnoj zhelezy i v vide; mechennoj jodom-125 bengal'skoj rozy dlja skennirovanija pecheni. U nekotoryh bol'nyh skennirovanie shhitovidnoj zhelezy i skennirovanie metastozov raka shhitovidnoj zhelezy bylo povtoreno s ispol'zovaniem joda-131. Skennirovanie pecheni bylo povtoreno s ispol'zovaniem kolloidnogo zolota-198. ''Holodnye'' uzelki v shhitovidnoj zheleze, kotorye nel'zja obnaruzhit' s pomoshh'ju joda-131, byli otchetlivo vidny pri skennirovanii s pomoshh'ju joda-125. S pomoshh'ju joda-125 mozhno bylo otlichit' rannie metastazy v legkih ot pozdnih, togda kak s pomoshh'ju joda-131 sdelat' jeto ne udavalos'. Pri ispol'zovanii odinakovyh doz, v sluchae s jodom-131 fon byl znachitel'no vyshe i ne mog byt' vedelen, tak kak jeto snizilo by skorost' scheta nad porazhennymi mestami do urovnej, kotorye nel'zja obnaruzhit'. Nekotorye fotoskennogrammy i mehanicheskie skennogrammy pecheni, vypolnennye s pomoshh'ju kolloidnogo zolota-198 nel'zja objasnit'. Odnako ''holodnye'' uchastki porazhenija otchetlivo vidny na skennogrammaL pecheni teh zhe bol'nyh, esli oni sdelany s pomoshh'ju mechennoj jodom-125 bengal'skoj rozy. (author)Source
International Atomic Energy Agency, Vienna (Austria); 484 p; Oct 1964; p. 71-77; Symposium on medical radioisotope scanning; Athens (Greece); 20-24 Apr 1964; IAEA-SM--51/26; ISSN 0074-1884; ; 5 refs., 5 figs.
; 5 refs., 5 figs.