Method and apparatus for selective internal radiation therapy planning and implementation
First Claim
1. A method for planning and implementing a selective internal radiation therapy (SIRT), comprising the steps of:
- providing a processor with a large volume dataset of a patient who is to undergo SIRT, said large volume dataset encompassing the entire liver of the patient, said liver having a tumor therein fed with blood by feeder vessels emanating from a main branch;
in the processor, automatically segmenting the liver from surrounding tissue in said large volume dataset by executing a computerize segmentation algorithm, and automatically calculating the volume of the liver from the segmented liver;
injecting contrast agent into said main branch for said feeder vessels and acquiring a contrast-enhanced tomographic volume dataset from the patient comprising a contrast-enhanced tumor and contrast-enhanced feeder vessels that supply blood to said contrast-enhanced tumor;
in said processor, automatically segmenting said contrast-enhanced tumor and said contrast-enhanced feeder vessels from surrounding tissue in said contrast-enhanced volume dataset by executing a computerize segmentation algorithm;
in said processor, automatically calculating the volume of the tumor from the segmented contrast-enhanced tumor;
determining a lung shunt percentage for said patient;
determining the body surface area (BSA) of the patient;
in said processor, automatically calculating an amount of therapeutic agent for use in said SIRT for treating said tumor, from the BSA, the lung shunt percentage, the liver volume, and the tumor volume;
obtaining a live fluoroscopic image of the liver of the patient during SIRT and overlaying the segmented contrast-enhanced liver and the segmented contrast-enhanced feeder vessels on said live fluoroscopic image, to obtain an overlay image;
using said overlay image, positioning a catheter with respect to at least one of said feeder vessels; and
via said catheter, administering the calculated amount of said therapeutic agent during SIRT.
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Abstract
In a method and system for planning and implementing a selective internal radiation therapy (SIRT), the liver volume and the tumor volume are automatically calculated in a processor by analysis of items segmented from images obtained from the patient using one or more imaging modalities, with the administration of a contrast agent. The volume of therapeutic agent that is necessary to treat the tumor is automatically calculated from the liver volume, the tumor volume, and the body surface area of the patient and the lung shunt percentage for the patient. The therapeutic agent can be administered via respective feeder vessels in respectively different amounts that correspond to the percentage of blood supply to the tumor from the respective feeder vessels, this distribution also being automatically calculated by analysis of one or more parenchymal blood volume (PBV) images.
162 Citations
10 Claims
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1. A method for planning and implementing a selective internal radiation therapy (SIRT), comprising the steps of:
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providing a processor with a large volume dataset of a patient who is to undergo SIRT, said large volume dataset encompassing the entire liver of the patient, said liver having a tumor therein fed with blood by feeder vessels emanating from a main branch; in the processor, automatically segmenting the liver from surrounding tissue in said large volume dataset by executing a computerize segmentation algorithm, and automatically calculating the volume of the liver from the segmented liver; injecting contrast agent into said main branch for said feeder vessels and acquiring a contrast-enhanced tomographic volume dataset from the patient comprising a contrast-enhanced tumor and contrast-enhanced feeder vessels that supply blood to said contrast-enhanced tumor; in said processor, automatically segmenting said contrast-enhanced tumor and said contrast-enhanced feeder vessels from surrounding tissue in said contrast-enhanced volume dataset by executing a computerize segmentation algorithm; in said processor, automatically calculating the volume of the tumor from the segmented contrast-enhanced tumor; determining a lung shunt percentage for said patient; determining the body surface area (BSA) of the patient; in said processor, automatically calculating an amount of therapeutic agent for use in said SIRT for treating said tumor, from the BSA, the lung shunt percentage, the liver volume, and the tumor volume; obtaining a live fluoroscopic image of the liver of the patient during SIRT and overlaying the segmented contrast-enhanced liver and the segmented contrast-enhanced feeder vessels on said live fluoroscopic image, to obtain an overlay image; using said overlay image, positioning a catheter with respect to at least one of said feeder vessels; and via said catheter, administering the calculated amount of said therapeutic agent during SIRT. - View Dependent Claims (2, 3, 4, 5)
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6. A system for planning and implementing a selective internal radiation therapy (SIRT), comprising:
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a tomographic imaging modality; a control unit configured to operate said tomographic imaging modality to generate a large volume dataset of a patient who is to undergo SIRT, said large volume dataset encompassing the entire liver of the patient, said liver having a tumor therein fed with blood by feeder vessels emanating from a main branch; a processor supplied with said large volume dataset and configured to automatically segment the liver from surrounding tissue in said large volume dataset by executing a computerize segmentation algorithm, and automatically calculate the volume of the liver from the segmented liver; a contrast agent injector; said control unit being configured to operate said tomographic imaging modality and said contrast agent injector to inject contrast agent into said main branch for said feeder vessels and to acquire a contrast-enhanced tomographic volume dataset from the patient comprising a contrast-enhanced tumor and contrast-enhanced feeder vessels that supply blood to said contrast-enhanced tumor; said processor being configured to automatically segment said contrast-enhanced tumor and said contrast-enhanced feeder vessels from surrounding tissue in said contrast-enhanced volume dataset by executing a computerize segmentation algorithm; said processor being configured to automatically calculate the volume of the tumor from the segmented contrast-enhanced tumor; said processor also being supplied with an input representing a lung shunt percentage for said patient and an input representing the body surface area (BSA) of the patient, and said processor being configured to automatically calculate an amount of therapeutic agent for use in said SIRT for treating said tumor, from the BSA, the lung shunt percentage, the liver volume, and the tumor volume; a fluoroscopic imaging modality configured to obtain a live fluoroscopic image of the liver of the patient during SIRT and to overlay the segmented contrast-enhanced liver and the segmented contrast-enhanced feeder vessels on said live fluoroscopic image, to obtain an overlay image; a catheter that is positioned dependent on said overlay image, with respect to at least one of said feeder vessels; and said catheter being connected to a source of said therapeutic agent and being operated to administer the calculated amount of said therapeutic agent during SIRT. - View Dependent Claims (7, 8, 9, 10)
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Specification