ISSN:
1432-1920
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Medizin
Beschreibung / Inhaltsverzeichnis:
Résumé L'étude porte sur 195 cas de tumeurs vérifiées. La différenciation des anomalies observées en radio-angiographie fut évaluée quantitativement chez 47 malades, en appliquant la technique de «région intéressante» et les courbes activité-temps; qualitativement, l'étude est conduite chez 148 patients. Les résultats sont comparés au parenchyme normal. Les résultats correspondent à la vascularisation des tumeurs, ce qui peut être démontré, tant quantitativement que qualitativement, à l'aide d'images recueillies toutes les 4 sec pendant le temps de passage cérébral de l'embol 99 Tc.
Kurzfassung:
Zusammenfassung Bei 47 Patienten wurde während der cerebralen Radio-Angiographie die unterschiedliche Aktivitätsanreicherung im Tumor untersucht (quantitative Messungen). Bei 148 Patienten erfolgten qualitative Differenz-Nachweise. Dabei wurden die cerebralen Veränderungen in 4 Gruppen eingeteilt (Angiome, Meningeome und Glioblastome, hochdifferenzierte und maligne Gliome, Metastasen).
Notizen:
Summary The radioangiographic series of 195 patients with proven brain tumors have been reviewed. The differing behavior of these tumors during cerebral radioangiography (CRAG) was evaluated quantitatively in 47 patients, using the “region of interest” techniques and activity-time curves, and qualitatively in 148 patients. A “relative transport volume”, Q rel, the ratio of the curve integral over the abnormal region to that over normal parenchyma was introduced. This correlates with the tumor vascularity and can be calculated quantitatively, as well as demonstrated qualitatively by the pictures taken every 4 sec during the passage of the Tc-99m bolus through the brain. The tumors were divided into 4 groups: A) Angioma type (Q rel〉3) found in 65% of all the A-V angiomas. B) Meningioma/glioblastoma type (Q rel 1–3) with these tumors accounting for 81% of the tumors in this group. Approximately half of this 81% were meningiomas, diagnosed because of the typical delay in activity fall after its peak. Bone and malignant meningial processes fall into this range and follow the meningioma pattern qualitatively, but can be distinguished because of their superficial localization. C) Indifferent pattern (Q rel∼=1) was found with highly differentiated and malignant gliomas (46%) and metastases (40%). D) Metastatic type (Q rel〈1) with metastases found in 88% of this group. In addition, recurrent tumors often have changes in their radioangiographic pattern which result in Q rel values lower than those typical of their tumor type.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00341496
