Method for computing patient radiation dose in computed tomography
AssigneeThe Regents of the University of California
InventorJohn M. Boone
Life of this patent
Estimating the term…
Abstract
A system and method are disclosed for computing a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient. The CT image dataset generated during the scan of the patient, and one or more parameters relating to a x-ray source are used to calculate the radiation dose delivered to the patient as a function of the CT image data set and the one or more parameters of the x-ray source. The radiation dose is generally found by calculating a primary x-ray dose distribution and scattered x-ray dose distribution from the CT image dataset and taking the sum of the primary x-ray dose distribution and scattered x-ray dose distribution.
Claims31
A method for determining a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient, comprising:
- subjecting a patient to an x-ray beam from an x-ray source;
- determining a primary x-ray radiation dose from the x-ray beam;
- determining a scattered x-ray radiation dose from the x-ray beam;
- inputting properties from the x-ray source;
- wherein determining the primary x-ray radiation dose comprises calculating a primary dose distribution from CT scan image data generated during the CT scan of the patient;
- and
- calculating a radiation dose delivered to the patient based on the primary x-ray radiation dose and scattered x-ray radiation dose;
- wherein said properties are used to calculate the primary dose distribution;
- wherein one of said properties comprises a mA modulation scheme of the x-ray source;
- wherein the mA modulation scheme is used to compute the radiation dose delivered to the patient.
A method for determining a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient, comprising:
- subjecting a patient to an x-ray beam from an x-ray source;
- determining a primary x-ray radiation dose from the x-ray beam;
- determining a scattered x-ray radiation dose from the x-ray beam;
- calculating a radiation dose delivered to the patient based on the primary x-ray radiation dose and scattered x-ray radiation dose;
- wherein determining the primary x-ray radiation dose comprises calculating a primary dose distribution from CT scan image data generated during the CT scan of the patient;
- and wherein determining the scattered x-ray radiation dose comprises calculating a scattered dose distribution from the CT scan image data and the primary dose distribution;
- and
- determining a secondary scattered x-ray radiation dose from the scattered dose distribution and the CT scan image data.
A method for determining a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient, comprising:
- subjecting a patient to an x-ray beam from an x-ray source;
- determining a primary x-ray radiation dose from the x-ray beam;
- determining a scattered x-ray radiation dose from the x-ray beam;
- calculating a radiation dose delivered to the patient based on the primary x-ray radiation dose and scattered x-ray radiation dose;
- comprising:
- determining a boundary of an organ of the patient;
- and
- calculating an average radiation dose delivered to the organ based on the determined boundary and the calculated radiation dose.
A method for computing a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient, comprising:
- generating a CT image dataset of a region of the patient;
- determining one or more parameters relating to a x-ray source used to generate the CT image dataset;
- and
- calculating the radiation dose delivered to the patient as a function of the CT image data set and the one or more parameters of the x-ray source;
- wherein determining one or more parameters comprises determining a mA modulation scheme of the x-ray source.
A method for computing a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient, comprising:
- generating a CT image dataset of a region of the patient;
- determining one or more parameters relating to a x-ray source used to generate the CT image dataset;
- calculating the radiation dose delivered to the patient as a function of the CT image data set and the one or more parameters of the x-ray source;
- wherein calculating the radiation dose delivered to the patient comprises:
- calculating a primary x-ray dose distribution from the CT image dataset;
- calculating a scattered x-ray dose distribution from the CT image dataset;
- and
- calculating the radiation dose delivered to the patient based on said primary x-ray dose distribution and scattered x-ray dose distribution;
- and
- determining a secondary scattered x-ray dose distribution from the scattered x-ray dose distribution and the CT image dataset.
A method for computing a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient, comprising:
- generating a CT image dataset of a region of the patient;
- determining one or more parameters relating to a x-ray source used to generate the CT image dataset;
- calculating the radiation dose delivered to the patient as a function of the CT image data set and the one or more parameters of the x-ray source;
- determining a boundary of an organ of the patient;
- and
- calculating an average radiation dose delivered to the organ based on the determined boundary and the calculated radiation dose.
A method for computing a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient, comprising:
- generating a CT image dataset of a region of the patient;
- determining one or more parameters relating to a x-ray source used to generate the CT image dataset;
- calculating a primary x-ray dose distribution as a function of the CT image dataset and the one or more parameters relating to a x-ray source;
- calculating a scattered x-ray dose distribution as a function of the primary x-ray dose distribution;
- computing the radiation dose delivered to the patient based on the primary x-ray dose distribution and scattered x-ray dose distribution;
- determining a boundary of an organ of the patient;
- and
- calculating an average radiation dose delivered to the organ based on the determined boundary and the calculated radiation dose.
Dependencies are inferred from the claim text.