A Csiactive Pixel Sensor Based Detector For Gamma Ray Imaging

• doi: 10.1109/NSSMIC.2006.356503
• title: A CsI-Active Pixel Sensor Based Detector for Gamma Ray Imaging
• publisher: IEEE
• isbn: 1-4244-0561-0
• issn: 1082-3654
• partnum: 06CH37832
• rank: 683
• access_type: LOCKED
• content_type: Conferences
• abstract: A Startracker CMOS monolithic active pixel sensor with 525times525 pixels each 25 microns/side has been coupled via a fibre optic stud to a CsI(Tl) crystal 2mm times 20mm times 20mm to form a test detector of gamma rays of energy between 60 keV and 200 keV. The crystal is segmented into 400 micron elements separated by 100 microns of filler. The system records images at 10 f/sec and is interfaced to a PC via an FPGA-based DAQ and optical link. Image acquisition is performed using a MatLab-based GUI. Noise is measured to be ~100 electrons with a temperature dependence of ~0.4%/C indicating that the majority of noise is reset related or fixed pattern in nature rather than statistical thermal noise. Images have been acquired using a Tc99m source placed directly onto the CsI(Tl) crystals as well as through several lead collimators. The structure of the CsI(Tl) scintillator is easy resolved once a noise image is subtracted and an intrinsic spatial resolution of 80-90 microns is measured. The system spatial resolution with a collimator is ~450 microns for 140keV photons. The results indicate that the present APS has too high a noise level for imaging low energy photons but a new device with ~25 electrons noise plus the potential to provide on-chip signal thresholding and cluster analysis could become part of a large-area intelligent gamma ray imager with a sub-mm spatial resolution at 140 keV.
• article_number: 4179660
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4179660
• html_url: https://ieeexplore.ieee.org/document/4179660/
• abstract_url: https://ieeexplore.ieee.org/document/4179660/
• publication_title: 2006 IEEE Nuclear Science Symposium Conference Record
• conference_location: San Diego, CA, USA
• conference_dates: 29 Oct.-1 Nov. 2006
• publication_number: 4143535
• is_number: 4179561
• publication_year: 2006
• publication_date: 29 Oct.-1 Nov. 2006
• start_page: 2990
• end_page: 2992
• citing_paper_count: 2
• citing_patent_count: 0
• download_count: 109
• insert_date: 20070507
• index_terms:
  • ieee_terms:
    • Gamma ray detectors
    • Pixel
    • Image sensors
    • Gamma ray detection
    • Nuclear imaging
    • Spatial resolution
    • Optical noise
    • Noise measurement
    • Electrons
    • Noise level
  • dynamic_index_terms:
    • Gamma Rays
    • Sensor Pixel
    • Gamma-ray Imaging
    • Spatial Resolution
    • Optical Fiber
    • Fiber-optic
    • Image Noise
    • Active Sensors
    • Scintillator
    • Optical Link
    • Intrinsic Resolution
    • High-resolution
    • Imaging System
    • Near Future
    • High Spatial Resolution
    • Quantum Efficiency
• isbn_formats:
  • format: CD, value: 1-4244-0561-0, isbnType: Historical
  • format: Print ISBN, value: 1-4244-0560-2, isbnType: Historical
• authors:
  • Author Name: R. J. Ott
    Affiliation: Physics Department, Institute of Cancer Research, Sutton, UK
    Author URL: https://ieeexplore.ieee.org/author/37273183800
    ID: 37273183800
    Order: 1
    Author Affiliations:
    • Physics Department, Institute of Cancer Research, Sutton, UK
  • Author Name: N. Evans
    Affiliation: Physics Department, Institute of Cancer Research, Sutton, UK
    Author URL: https://ieeexplore.ieee.org/author/37288875800
    ID: 37288875800
    Order: 2
    Author Affiliations:
    • Physics Department, Institute of Cancer Research, Sutton, UK
  • Author Name: E. Harris
    Affiliation: Physics Department, Institute of Cancer Research, Sutton, UK
    Author URL: https://ieeexplore.ieee.org/author/37297693000
    ID: 37297693000
    Order: 3
    Author Affiliations:
    • Physics Department, Institute of Cancer Research, Sutton, UK
  • Author Name: P Evans
    Affiliation: Physics Department, Institute of Cancer Research, Sutton, UK
    Author URL: https://ieeexplore.ieee.org/author/37298221000
    ID: 37298221000
    Order: 4
    Author Affiliations:
    • Physics Department, Institute of Cancer Research, Sutton, UK
  • Author Name: J. Osmond
    Affiliation: Brunei University, UK
    Author URL: https://ieeexplore.ieee.org/author/38305262400
    ID: 38305262400
    Order: 5
    Author Affiliations:
    • Brunei University, UK
  • Author Name: A. Holland
    Affiliation: Brunei University, UK
    Author URL: https://ieeexplore.ieee.org/author/38181840900
    ID: 38181840900
    Order: 6
    Author Affiliations:
    • Brunei University, UK
  • Author Name: M. Prydderch
    Affiliation: CCLRC Ruthelford Appleton Laboratory, UK
    Author URL: https://ieeexplore.ieee.org/author/37295411100
    ID: 37295411100
    Order: 7
    Author Affiliations:
    • CCLRC Ruthelford Appleton Laboratory, UK
  • Author Name: A. Clark
    Affiliation: CCLRC Ruthelford Appleton Laboratory, UK
    Author URL: https://ieeexplore.ieee.org/author/37290996500
    ID: 37290996500
    Order: 8
    Author Affiliations:
    • CCLRC Ruthelford Appleton Laboratory, UK
  • Author Name: J. Crooks
    Affiliation: CCLRC Ruthelford Appleton Laboratory, UK
    Author URL: https://ieeexplore.ieee.org/author/37295406000
    ID: 37295406000
    Order: 9
    Author Affiliations:
    • CCLRC Ruthelford Appleton Laboratory, UK
  • Author Name: R. Halsall
    Affiliation: CCLRC Ruthelford Appleton Laboratory, UK
    Author URL: https://ieeexplore.ieee.org/author/37295406900
    ID: 37295406900
    Order: 10
    Author Affiliations:
    • CCLRC Ruthelford Appleton Laboratory, UK
  • Author Name: M. Key-Charriere
    Affiliation: CCLRC Ruthelford Appleton Laboratory, UK
    Author URL: https://ieeexplore.ieee.org/author/38308480600
    ID: 38308480600
    Order: 11
    Author Affiliations:
    • CCLRC Ruthelford Appleton Laboratory, UK
  • Author Name: S. Martin
    Affiliation: CCLRC Ruthelford Appleton Laboratory, UK
    Author URL: https://ieeexplore.ieee.org/author/38366722000
    ID: 38366722000
    Order: 12
    Author Affiliations:
    • CCLRC Ruthelford Appleton Laboratory, UK
  • Author Name: R. Turchetta
    Affiliation: CCLRC Ruthelford Appleton Laboratory, UK
    Author URL: https://ieeexplore.ieee.org/author/37295412200
    ID: 37295412200
    Order: 13
    Author Affiliations:
    • CCLRC Ruthelford Appleton Laboratory, UK

Image Sensor

• sensor_type: CMOS Monolithic Active Pixel Sensor (APS)
• resolution: 525x525 pixels
• dynamic_range: Not specified
• pixel_size: 25 microns
• dark_current: Not specified

Optical Data

• focal_length: Not specified
• aperture: Not specified
• field_of_view: Not specified
• distortion: Not specified

Performance Metrics

• frame_rate: 10 fps
• noise: ~100 electrons

Applications & Benefits

• cell_imaging: Gamma ray imaging for nuclear medicine applications, particularly with 99mTc tracers.
• benefits: High spatial resolution imaging, potential for lower noise with new APS.

Supporting Organizations

• supported_by: CCLRC, Rutherford Appleton Laboratory, UK Research Councils

Manuscript Details

• publication_date: 29 Oct.-1 Nov. 2006

Relevancy Score

• score: 8
• missing_fields:
  • dynamic_range
  • dark_current
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • signal_to_noise_ratio
  • sensitivity
  • shutter_speed
  • power_consumption

Processed JSON Filename

request_2c373571-7c9a-42ca-8345-e5efa4e1fc67-a_csiactive_pixel_sensor_based_detector_for_gamma_ray_imaging.json