[Results and assessment of ventilation and perfusion scintigraphic studies following left-sided homologous lung transplantation in the dog]. / Ergebnisse und Wertung ventilations- und perfusionsszintigraphischer Untersuchungen nach homologen linksseitigen Lungentransplantationen am Hund.

Left-sided homologous lung transplantations (LTP) were carried out in 18 mongrel dogs. Exhalation and perfusion scannings took place for interpreting the ventilation and perfusion in the postoperative course. The per cent Xe133 storage and the exhalation per minute show the significant reduction of the ventilation in the transplants dependent on the duration of the postoperative interval. The compensation behaviour of the ventilation of the non-operated lung shows the compartment analysis. The perfusion index QL/QR with Tc99m decreased progressively in the postoperative course.--These investigation methods are slightly invasive. They allow the synoptic recording of the relationships between ventilation and perfusion. A differential diagnosis of complications after lung transplantations is not possible, however.

[Experience with nuclear medical placenta perfusion diagnosis]. / Erfahrungen mit der nuklearmedizinischen Plazentaperfusiondiagnostik.

Report about evaluation of placenta perfusion studies in 105 females with pregnancies in risk. They were aged between 17 and 48 years and examined during the 27. to 42. week of gestation. Placenta was located after preinjection of 0.1 mCi 113mIn chloride. Examination was performed with a gamma camera, Type NC-HP, and a computing system PDP 11/10 (Gamma 11) on line. Sequential scintigraphy after slow injection of 1.5 mCi 113mIn chloride with 2-seconds-frames over a period of 3 minutes. Performance of histogramm after ROI-contouring of placenta. Half time of the ascending limb of placenta curve is the criterion of perfusion. The mathematical formalism was developed assuming an one-compartment model by Lorenz and Ostertag. Analyzing on the screen by hand we received normal values of half time: 19 +/- 3.4 seconds; using automatical analysis for suitable e-functions developed by Potschwadek we received normal values of half time: 11 less than 1.8 sec.