Setup of SIPM based PET detector using LSO background radiation

Patent metadata

Field	Value
Publication number	US-10775520-B2
Application number	US-201916676601-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Apr 7, 2015
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

Systems and methods for configuring a radiation detector are provided. A first event is detected at a first scintillator crystal of a first detector unit. A second coincident event is detected at a second scintillator crystal of a second detector unit adjacent to the first detector unit. Operating parameters are calculated for the first detector unit based on the coincident events.

First claim

The invention claimed is:

1. A composite detector comprising:
a plurality of detector units, wherein each detector unit includes an array of scintillation elements and an array of photo-sensors;
wherein a first detector unit of the plurality of detector units is configured to acquire self-activity event data including detection of a first radiation event including a first energy level and first position information;
wherein a second detector unit of the plurality of detector units, adjacent to the first detector unit in the composite detector, is configured acquire self-activity event data including detection of a second radiation event related to the first radiation event, the second radiation event including a second energy level and second position information; and
a processing unit configured to:
generate crystal region maps for each of the plurality of detector units and the array of scintillator elements from the acquired self-activity event data;
identify a coincidence event of the first and second radiation events; and
calculate operating parameters for the first detector unit and second detector unit based on the timing differences of the coincident event and a distance between the first position and second position of the coincidence event.

2. The composite detector of claim 1 , wherein the processing unit is further configured to:
calculate a relative time delay for each scintillation element in the first detector unit relative to an average time delay for the first detector unit.

3. The composite detector of claim 1 , wherein the second energy level is different than the first energy level.

4. The composite detector of claim 3 , wherein the first energy level and the second energy level are related to the decay of Lu-176 in a scintillator element in the first detector unit.

5. The composite detector of claim 1 , wherein the processing unit is further configured to calculate operating parameters for the composite detector.

Assignees

• Siemens Medical Solutions Usa Inc

Inventors

• Cho Sanghee
• Mintzer Robert
• Breuer Johannes

Classifications

• G01T1/2985 Primary

  In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis); (using external radiation sources A61B6/02) · CPC title

• G01T7/005

  calibration techniques (stabilization of spectrometer G01T1/40) · CPC title