WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1980000056) IMPROVED NUCLEAR CARDIOLOGY APPARATUS AND METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000056    International Application No.:    PCT/US1979/000416
Publication Date: 24.01.1980 International Filing Date: 14.06.1979
IPC:
A61B 5/0275 (2006.01), A61B 5/0456 (2006.01), G01T 1/164 (2006.01)
Applicants:
Inventors:
Priority Data:
917063 19.06.1978 US
Title (EN) IMPROVED NUCLEAR CARDIOLOGY APPARATUS AND METHOD
(FR) APPAREIL ET METHODE AMELIORES DE CARDIOLOGIE NUCLEAIRE
Abstract: front page image
(EN)A nuclear cardiology system (M) for use with a scintillation camera for evaluating cardiac function by real time measurement of the variation of radiation from the heart of a patient to whom is administered a radioactive tracer. The camera (C) provides data describing the location of individual counts representing radiation events coming from the patient. The system segregates, in real time, counts corresponding to radiation from an electronically defined region of interest (30) describing an investigated part of the heart such as the left ventricle. Synchronized by the patient"s electrocardiogram, (20) time gated memory circuitry divides each heart-beat into a series of subintervals, and stores indications of the respective amounts of radiation events emanating from the region of interest during each of the subintervals. Calculating circuitry (32, 40) scans the stored information and, based on the maximum and minimum respective radiation amounts detected in the subintervals, computes the fraction of blood ejected by the heart in each beat. A strip chart recorder (12) provides a permanent representation of the curve of radiation from the region of interest as defined by the indicated series of subinterval radiation amounts.
(FR)Un systeme de cardiologie nucleaire (N) est utilise avec une camera a scintillation pour evaluer la fonction cardiaque par mesure en temps reel de la variation de radiations emise par le coeur d"un patient auquel on a administre un traceur radio-actif. La camera (C) produit des donnees decrivant l"emplacement de comptage individuels representant les evenements de radiation provenant du patient. Le systeme separe, en temps reel, les comptages correspondants a la radiation en les isolant d"une region d"interets definis electroniquement (30) decrivant une partie du coeur etudiee tel que le ventricule gauche. Synchronises par l"electrocardiogramme du patient, des circuits de memoire de temps (20) divisent chaque battement du coeur en une serie de six intervalles et emmagasinent les indications des quantites respectives d"evenements de radiation provenant de la region d"interet pendant chacun de ces sous-intervalles. Un circuits de calcul (32, 40) analyse l"information emmagasinee et, en se basant sur les quantites de radiation maximum et minimum respectives detectees dans les sous-intervalles calculent la fraction de sang ejecte par le coeur dans chaque battement. Un enregistreur graphique sur diagramme (12) produit une representation permanente de la courbe de radiation provenant de la region d"interet telle qu"elle est definie par les series indiquees de quantite de radiation de sous-intervalle.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)