摘要:
This invention relates to a process for the preparation of polyether-including chlorins and/or bacteriochlorins, comprising the following steps:(a) bonding a polyether to a porphyrin and(b) reacting the polyether-including porphyrin with a reducing agent.Furthermore, this invention concerns the polyether-including chlorins and bacteriochlorins, obtained by the process, as well as the use thereof for the photodynamic treatment of tumors.
摘要:
Tumor-active or tumor-diagnostic substances having preferred accumulation in the tumor, which are characterized in that they haveat least two phenolic hydroxyl and/or amino groups,at least one aliphatic amino group, orat least one phenolic hydroxyl and/or amino group andat least one aliphatic amino groupand that these groups are substituted with polyethylene glycol chains whose polymerization degree n is 5 to 250 and whose terminal hydroxyl group is substituted by C.sub.1 -C.sub.12 alkyl ester or ether, each of the substances being substituted by at least two such polyethylene glycol chains.
摘要:
The invention relates to conjugates composed ofa) at least one polyalcohol or a derivatized polyalcohol,b) at least one active agent,c) at least one linker andd) a protein,wherein the polyalcohol(s) or the derivatized polyalcohol(s) are polyalcohols or derivatized polyalcohols which are not recognized by the defense system of an organism as exogenous, and the protein is a protein which can be taken up by the tumor specifically or non-specifically, and is not recognized by the defense system of an organism as exogenous. These conjugates are suitable for, on the one hand, making possible a very sensitive method in nuclear medicine for the diagnosis of tumors and, on the other hand, for example also offering new methods for diagnosing tumors in X-ray diagnosis, computerized tomography, nuclear spin tomography, electron spin resonance spectroscopy or electron microscopy.
摘要:
A contour collimator has a plurality of plate-shaped diaphragm elements movably arranged with respect to each other in a guiding block to form a contour diaphragm for a radiation beam emitted by a radiation source towards the collimator, and at least one drive for moving the diaphragm elements. A drive is associated with each diaphragm element with the drives of a group of diaphragm elements being substantially adjacent, and a driving transmission arranged between each drive and the associated diaphragm element.
摘要:
A contour collimator has diaphragm plates arranged in displaceable fashion relative to one another. Each diaphragm plate is individually engageable with an adjustment element shared by all of the diaphragm plates for displacing one diaphragm plate relative to the remaining diaphragm plates. An interlock mechanism in engagement with the remaining diaphragm plates retains those plates in their respectively existing positions during displacement of the one plate. The adjustment element is displaceable from the one diaphragm plate to another diaphragm plate which can then be displaced by the adjustment element while the other plates are retained in position.