RESERVOIR FOR A REPLENISHED HOMOGENEOUS GAMMA-RADIATION SOURCE BASED ON AQUEOUS SOLUTION OF SODIUM Tc-PERTECHNETATE AND A METHOD FOR CONTOURING A PATIENT'S BODY FOR INDIRECT PLANAR LYMPHOSCINTIGRAPHY IN "WHOLE BODY" MODE Russian patent published in 2020 - IPC A61B6/00 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine. Container for replenished homogenous gamma-radiation source based on aqueous solution of sodium ^99mTc-pertechnetate characterized in that the container is made in the form of a parallelepiped of acrylic plastic with size of 51×51×4 cm and volume of 5,000 cm³. On upper edge of reservoir there are two round holes with thread ∅ 8.8 mm for metal bolts with silicone gaskets. On rear surface of container there are symmetrically arranged four ledges at distance of 4.5 cm from side faces with size of 5×5 cm for installation of container into "holder for homogeneous source". Method for contouring a patient's body for indirect planar whole body lymphoscintigraphy involves administering to a patient a preparation based on ^99mTc-labeled colloidal nanoparticles with activity of up to 110 MBq, and 30 minutes after the introduction, the gamma-camera is used for indirect planar lymphoscintigraphy in the "whole body" mode. Two-detector rotary gamma-ray monitor is used to specify the protocol of indirect planar lymphoscintigraphy. Signal is recorded only by upper detector. Lower detector is switched off and a holder with solution of sodium ^99mTc-pertechnetate, uniformly distributed in 5 l of distilled water, is placed on it. After the examination is completed, the obtained images are evaluated, wherein the patient's body is defined as a homogeneous section which does not transmit a signal to the detector, and the injection site and the lymph drainage path - in the form of high-signal centers and zones, wherein the sentinel lymph node is visualized on the lymphoscintigram as a bright RPA hyper fixation center in the projection of the potential lymphatic drain zone.

EFFECT: use of this group of inventions is cost-effective, easy to implement, has high throughput capacity, since it does not require long time for preparation and postprocessor processing, and enables to obtain data from the entire region of interest.

2 cl, 12 dwg, 3 ex