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Evaluation of Fluorine-18 as a Scanning Agent for Intracranial Tumours; Emploi du Fluor-18 en Scintigraphy des Tumeurs Intracraniennes; Otsenka Ftora-18 kak skenniruyushchego agenta dlya vnutricherepnykh opukholej; Examen de las Caracteristicas del Fluor-18 como Agente de Exploracion de los Tumores Intracraneales

Abstract

F{sup 18}, a 110-min half-life, positron emitter was studied as a possible agent for brain-tumour localization. It was prepared in a nuclear reactor by thermal neutron irradiation of Li{sub 2}CO{sub 3} (Li{sup 6} (n, {alpha}) H{sup 3}, O{sup 16}(H{sup 3}, n) F{sup 18}). Tissue studies in mice bearing subcutaneously-transplanted ependymomas indicated that labelled sodium fluoride (NaF{sup 18}) gave excessive concentrations in bone and was therefore unsuitable as a brain-scanning agent. However, labelled potassium fluoborate (KBF{sup 18}{sub 4}) showed good preferential uptake in tumour compared with brain, uptake ratios ranging from 8 to 11. No excessive concentrations were found in other organs in either mice or cats. Toxicity studies were carried out in mice and rabbits at levels of 300 mg/kg and 120 mgAg respectively. No adverse effects were observed provided the solution was neutralized to a physiological pH. The chemical amounts needed for patient scanning were less than 0.5 mgAg of body weight. A comparative clinical study of 10 patients, each scanned with KBF{sup 18}{sub 4} and other isotopic agents, corroborated the findings of Askenasy et al. that this is a useful compound for brain-tumour localization. Intravenous injection was optimally performed 30 min before scanning at a dosage of 15  More>>
Authors:
Entzian, W.; Aronow, S.; Soloway, A. H.; Sweet, W. H. [1] 
  1. Massachusetts General Hospital, Boston, MA (United States)
Publication Date:
Oct 15, 1964
Product Type:
Conference
Report Number:
IAEA-SM-51/41
Resource Relation:
Conference: Symposium on medical radioisotope scanning, Athens (Greece), 20-24 Apr 1964; Other Information: 11 refs., 3 figs., 4 tabs.; Related Information: In: Medical Radioisotope Scanning, Vol. II. Proceedings of the Symposium on Medical Radioisotope Scanning| 484 p.
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; BLOOD; BRAIN; CATS; FLUORINE 18; HALF-LIFE; INTRAVENOUS INJECTION; IRRADIATION; LITHIUM 6 TARGET; LITHIUM CARBONATES; MICE; NEUTRON BEAMS; NEUTRON REACTIONS; OXYGEN 16 TARGET; PATIENTS; POSITRONS; RADIOISOTOPE SCANNING; SKELETON; SODIUM FLUORIDES; THERMAL NEUTRONS
OSTI ID:
22136624
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Contract Number:
Grant AT(30-1)-1242; C-3174
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M3077091282
Submitting Site:
INIS
Size:
page(s) 109-119
Announcement Date:
Oct 03, 2013

Citation Formats

Entzian, W., Aronow, S., Soloway, A. H., and Sweet, W. H. Evaluation of Fluorine-18 as a Scanning Agent for Intracranial Tumours; Emploi du Fluor-18 en Scintigraphy des Tumeurs Intracraniennes; Otsenka Ftora-18 kak skenniruyushchego agenta dlya vnutricherepnykh opukholej; Examen de las Caracteristicas del Fluor-18 como Agente de Exploracion de los Tumores Intracraneales. IAEA: N. p., 1964. Web.
Entzian, W., Aronow, S., Soloway, A. H., & Sweet, W. H. Evaluation of Fluorine-18 as a Scanning Agent for Intracranial Tumours; Emploi du Fluor-18 en Scintigraphy des Tumeurs Intracraniennes; Otsenka Ftora-18 kak skenniruyushchego agenta dlya vnutricherepnykh opukholej; Examen de las Caracteristicas del Fluor-18 como Agente de Exploracion de los Tumores Intracraneales. IAEA.
Entzian, W., Aronow, S., Soloway, A. H., and Sweet, W. H. 1964. "Evaluation of Fluorine-18 as a Scanning Agent for Intracranial Tumours; Emploi du Fluor-18 en Scintigraphy des Tumeurs Intracraniennes; Otsenka Ftora-18 kak skenniruyushchego agenta dlya vnutricherepnykh opukholej; Examen de las Caracteristicas del Fluor-18 como Agente de Exploracion de los Tumores Intracraneales." IAEA.
@misc{etde_22136624,
title = {Evaluation of Fluorine-18 as a Scanning Agent for Intracranial Tumours; Emploi du Fluor-18 en Scintigraphy des Tumeurs Intracraniennes; Otsenka Ftora-18 kak skenniruyushchego agenta dlya vnutricherepnykh opukholej; Examen de las Caracteristicas del Fluor-18 como Agente de Exploracion de los Tumores Intracraneales}
author = {Entzian, W., Aronow, S., Soloway, A. H., and Sweet, W. H.}
abstractNote = {F{sup 18}, a 110-min half-life, positron emitter was studied as a possible agent for brain-tumour localization. It was prepared in a nuclear reactor by thermal neutron irradiation of Li{sub 2}CO{sub 3} (Li{sup 6} (n, {alpha}) H{sup 3}, O{sup 16}(H{sup 3}, n) F{sup 18}). Tissue studies in mice bearing subcutaneously-transplanted ependymomas indicated that labelled sodium fluoride (NaF{sup 18}) gave excessive concentrations in bone and was therefore unsuitable as a brain-scanning agent. However, labelled potassium fluoborate (KBF{sup 18}{sub 4}) showed good preferential uptake in tumour compared with brain, uptake ratios ranging from 8 to 11. No excessive concentrations were found in other organs in either mice or cats. Toxicity studies were carried out in mice and rabbits at levels of 300 mg/kg and 120 mgAg respectively. No adverse effects were observed provided the solution was neutralized to a physiological pH. The chemical amounts needed for patient scanning were less than 0.5 mgAg of body weight. A comparative clinical study of 10 patients, each scanned with KBF{sup 18}{sub 4} and other isotopic agents, corroborated the findings of Askenasy et al. that this is a useful compound for brain-tumour localization. Intravenous injection was optimally performed 30 min before scanning at a dosage of 15 {mu}c/kg of body weight. Tissue samples of tumour and normal brain were obtained from one patient at operation. The uptake ratio was 3.5. While this is lower than that found in the mouse, it is still in a useful range. Blood samples obtained from patients at varying time intervals after injection yielded a blood clearance curve which had two time constants. The first was very rapid and the second slower. This sequence is typical of useful scanning agents. (author) [French] Les auteurs ont etudie la possibilite d'employer {sup 18}F, emetteur de positons ayant une periode de 110 min, pour localiser lcs tumeurs du cerveau. Cette substance a ete preparee dans un reacteur par irradiation de Li{sub 2}Co{sub 3} par des neutrons thermiques ({sup 6}Li (n, {alpha}){sup 3}H, {sup 15}O({sup 3}H, n){sup 18}F). Il ressort d'etudes faites sur des tissus de souris presentant des ependymomes implantes par greffes sous-cutanees que le fluorure de sodium marque (Na{sup 18}F) se concentre de maniere excessive dans les os et qu'il ne convient donc pas pour explorer le cerveau. Par contre, on a constate que le fluoborate de potassium marque (KBF{sup 18}{sub 4}) se concentrait nettement plus dans les tumeurs que dans le tissu normal du cerveau, les rapports de concentration allant de 8 a 11. Aucune concentration excessive n'a ete observee dans d'autres organes, tant chez les souris que chez les chats. Les auteurs ont fait des etudes de toxicite sur des souris et des lapins pour 300 mgAg et 120 mgAg' respectivement. Aucun effet nocif n'a ete observe tant que le pH de la solution etait maintenu a une valeur physiologique. Les quantites de substance necessaire pour proceder a la scintigraphie du sujet etaient inferieures a 0,5 mgAg de poids du corps. Une etude clinique comparative menee sur 10 patients, qui ont tous ete examines a l'aide de KBF{sup 18}{sub 4} et d'autres agents radioisotopiques, a confirme la conclusion d'Askenasy et autres: ce compose est utile pour localiser les tumeurs du cerveau. On a fait des injections intraveineuses dans des conditions optimales 30 min avant la scintigraphie, a raison de 15 {mu}c/kg de poids du corps. Des echantillons de tissus de tumeur et de tissus normaux du cerveau ont ete preleves sur un malade qui subissait une operation. Le rapport de concentration etait de 3,5. Bien que ce rapport soit inferieur a celui qui avait ete observe chez la souris, il n'en demeure pas moins convenable. L'examen d'echantillons de sang preleves sur des malades a divers intervalles apres l'injection a permis d'etablir une courbe d'elimination du sang a deux constantes de temps. La premiere etait tres rapide et la seconde plus lente, ce qui est caracteristique des bons agents de scintigraphie. (author) [Spanish] Los autores estudiaron la posibilidad de utilizar {sup 18}F (periodo: 110 min) para localizar tumores cerebrales. Prepararon este isotopo en un reactor por irradiacion de Li{sub 2}CO{sub 3} con neutrones termicos ({sup 6}Li (n, {alpha}){sup 3} H, {sup 16}O({sup 3}H, n) {sup 18}F). Los estudios realizados con tejidos de raton en el que se habfe transplantado epen- dimomas.por vCa subcutanea mostraron que el fluoruro de sodio marcado (Na{sup 18}F) se concentra excesivamente en los huesos y que, por tanto, no es adecuado para explorar el cerebro. Sin embargo, el tumor capto una proporcion mayor de fluoborato potasico marcado (KB{sup 18}F{sub 4}) que el tejido normal del cerebro; la razon de captacion fue de 8 a 11. En los experimentos efectuados con ratones y gatos no se observo ninguna concentracion excesiva en otros organos. Los autores efectuaron estudios de toxicidad sobre ratones y conejos con dosis de 300 mgAg y 120 mg/kg respectivamente. No se observo ningun efecto adverso cuando la solucion estaba neutralizada hasta alcanzar un pH fisiologico. La cantidad de productos quimicos necesaria para la exploracion fue inferior a 0,5 mg/kg de peso corporal. Un estudio clinico comparativo de 10 pacientes, explorados despues de administrarles KB{sup 18}F{sub 4} y otros agentes isotopicos, corroboro los resultados obtenidos por Askenasy y sus colaboradores, segun los cuales este compuesto es util para localizar tumores cerebrales. La inyeccion intravenosa dio resultados optimos cuando se administraron 15 {mu}c por kg de peso corporal 30 min antes de proceder a la exploracion. Se sacaron muestras de tumor y de tejido cerebral normal de un paciente durante la operacion. La razon de absorcion tumor/tejido normal fue de 3,5. Si bien este valor es inferior al correspondiente al raton, presenta todavia utilidad diagnostica. Las muestras de sangre extraidas a diferentes intervalos despues de la inyeccion permitieron trazar una curva de depuracion sanguinea con dos constantes de tiempo. La primera era muy breve y la segunda mas larga. Esta secuencia es tipica de los agentes de exploracion eficaces. (author) [Russian] V kachestve verojatnogo agenta dlja lokalizacii mozgovyh opuholej izuchalsja ftor-18, izluchatel' pozitronov s periodom poluraspada 110 min. Ftor-18 poluchali v jadernom reaktore putem obluchenija Li{sub 2}CO{sub 3} (Li{sup 6} (n, {alpha}) H{sup 3}, O{sup 16}(H{sup 3}, n) F{sup 18}) teplovymi nejtronami. Tkanevye issledovanija na myshah s peresazhennoj podkozhno jependimomoj pokazalo, chto mechenyj ftorid natrija (NaF{sup 18}) sozdaet izbytochnye koncentracii v kostjah i pojetomu ne udovletvorjaet v kachestve skennirujushhego agenta dlja mozga. Odnako pri primenenii mechenogo ftorborata kalija (KBF{sup 18}{sub 4})obnaruzheno izbiratel'noe pogloshhenie ego opuhol'ju po sravneniju s mozgom, prichem velichina pogloshhenija izmenjalas' v diapazone ot 8 do 11. Kak u myshej, tak i u koshek ne obnaruzheno izbytochnoj koncentracii v drugih organah. Izuchenie toksichnosti provodilos' na myshah i krolikah pri koncentracii 300mg/kg i 120 mg/kg sootvetstvenno. Pri nejtralizacii rastvora do urovnja fiziologicheskogo pH ne nabljudalos' nikakih neblagoprijatnyh jeffektov. Himicheskie kolichestva, neobhodimye dlja skennirovanija pacientov, sostavljali menee 0,5 mg/kg vesa tela. Sravnitel'nye klinicheskie issledovanija u 10 pacientov, kazhdyj iz kotoryh podvergalsja skennirovaniju s KBF{sup 18}{sub 4} drugimi izotopnymi veshhestvami, podtverdili vyvody Ashkenazi i dr. o tom, chto jeto soedinenie javljaetsja poleznym dlja opredelenija lokalizacii mozgovyh opuholej. Vnutrivennoe vvedenie osushhestvljalos' optimal'no za 30 minut do skennirovanija pri doze 15 mkkjuri/kg vesa tela. U odnogo pacienta pri operacii byli vzjaty obrazcy tkanej opuholi i zdorovoj tkani mozga. Kojefficient pogloshhenija sostavljal 3,5. Hotja jeto sootnoshenie nizhe, chem u myshej, no jeta velichina prakticheski prigodna. Pri issledovanii krovi, vzjatoj u pacientov cherez raznye promezhutki vremeni posle in{sup e}kcii, poluchena krivaja klirensa krovi, imejushhaja dve postojannyh vremeni. Pervaja-ochen' kratkovremennaja, vtoraja -medlennee. Takaja harakteristika tipichna dlja prigodnyh sken- nirujushhih agentov. (author)}
place = {IAEA}
year = {1964}
month = {Oct}
}