Patient Based Detector Crystal Quality Control for Time of Flight Acquisition

摘要

Disclosed herein too is a positron emission tomography calibration system comprising a positron emission tomography scanner having a ring detector that comprises at least one bin for receiving radiation; a patient that is placed at approximately the center of the ring detector where the patient is irradiated with at least one dose of a treatment radiation beam; a crystal efficiency calibration system that performs the following: measures activity generated by the at least one defined radiation dose in the at least one bin; takes projection data of the measured activity; calculates crystal efficiency from the projection data; re-estimates the measured activity of each bin based on the calculated crystal efficiency; and calibrates the detector based on the re-estimated measured activity.

主权项

1. A method for calibrating a positron emission tomography detector of a radiation therapy device, the method comprising:
applying, using a radiotherapy device, at least one defined radiation dose in a living sample body to induce a defined activity in the living sample body, the at least one defined radiation dose being applied by irradiating the living sample body with a treatment radiation beam of the radiotherapy device; where the positron emission tomography detector comprises at least one bin; measuring the activity generated by the at least one defined radiation dose in the at least one bin; taking projection data of the measured activity; calculating crystal efficiency from the projection data; re-estimating the measured activity of each bin based on the calculated crystal efficiency; and calibrating the bin based on the re-estimated measured activity.