Systematic investigation of the signal properties of polycrystalline HgI2 detectors under mammographic, radiographic, fluoroscopic and radiotherapy irradiation conditions

Zhong Su, Larry E. Antonuk, Youcef El-Mohri, Larry Hu, Hong Du, Amit Sawant, Yixin Li, Yi Wang, Jin Yamamoto, Qihua Zhao

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The signal properties of polycrystalline mercuric iodide (HgI2) film detectors, under irradiation conditions relevant to mammographic, radiographic, fluoroscopic and radiotherapy x-ray imaging, are reported. Each film detector consists of an ∼230 to ∼460 μM thick layer of HgI 2 (fabricated through physical vapour deposition or a screen-print process) and a thin barrier layer, sandwiched between a pair of opposing electrode plates. The high atomic number, high density and low effective ionization energy, WEFF, of HgI2 make it an attractive candidate for significantly improving the performance of active matrix, flat-panel imagers (AMFPIs) for several x-ray imaging applications. The temporal behaviour of current from the film detectors in the presence and in the absence of radiation was used to examine dark current levels, the lag and reciprocity of the signal response, x-ray sensitivity and WEFF. The results are discussed in the context of present AMFPI performance. This study provides performance data for a wide range of potential medical x-ray imaging applications from a single set of detectors and represents the first investigation of the signal properties of polycrystalline mercuric iodide for the radiotherapy application.

Original languageEnglish (US)
Pages (from-to)2907-2928
Number of pages22
JournalPhysics in Medicine and Biology
Volume50
Issue number12
DOIs
StatePublished - Jun 21 2005

Fingerprint

Radiotherapy
radiation therapy
X-Rays
Irradiation
Detectors
X rays
irradiation
detectors
Imaging techniques
Image sensors
iodides
x rays
Ionization potential
Dark currents
Physical vapor deposition
barrier layers
matrices
dark current
Electrodes
time lag

ASJC Scopus subject areas

  • Biomedical Engineering
  • Physics and Astronomy (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Systematic investigation of the signal properties of polycrystalline HgI2 detectors under mammographic, radiographic, fluoroscopic and radiotherapy irradiation conditions. / Su, Zhong; Antonuk, Larry E.; El-Mohri, Youcef; Hu, Larry; Du, Hong; Sawant, Amit; Li, Yixin; Wang, Yi; Yamamoto, Jin; Zhao, Qihua.

In: Physics in Medicine and Biology, Vol. 50, No. 12, 21.06.2005, p. 2907-2928.

Research output: Contribution to journalArticle

Su, Zhong ; Antonuk, Larry E. ; El-Mohri, Youcef ; Hu, Larry ; Du, Hong ; Sawant, Amit ; Li, Yixin ; Wang, Yi ; Yamamoto, Jin ; Zhao, Qihua. / Systematic investigation of the signal properties of polycrystalline HgI2 detectors under mammographic, radiographic, fluoroscopic and radiotherapy irradiation conditions. In: Physics in Medicine and Biology. 2005 ; Vol. 50, No. 12. pp. 2907-2928.
@article{7c2dfc51c5494a1aafeef027b0e96ae1,
title = "Systematic investigation of the signal properties of polycrystalline HgI2 detectors under mammographic, radiographic, fluoroscopic and radiotherapy irradiation conditions",
abstract = "The signal properties of polycrystalline mercuric iodide (HgI2) film detectors, under irradiation conditions relevant to mammographic, radiographic, fluoroscopic and radiotherapy x-ray imaging, are reported. Each film detector consists of an ∼230 to ∼460 μM thick layer of HgI 2 (fabricated through physical vapour deposition or a screen-print process) and a thin barrier layer, sandwiched between a pair of opposing electrode plates. The high atomic number, high density and low effective ionization energy, WEFF, of HgI2 make it an attractive candidate for significantly improving the performance of active matrix, flat-panel imagers (AMFPIs) for several x-ray imaging applications. The temporal behaviour of current from the film detectors in the presence and in the absence of radiation was used to examine dark current levels, the lag and reciprocity of the signal response, x-ray sensitivity and WEFF. The results are discussed in the context of present AMFPI performance. This study provides performance data for a wide range of potential medical x-ray imaging applications from a single set of detectors and represents the first investigation of the signal properties of polycrystalline mercuric iodide for the radiotherapy application.",
author = "Zhong Su and Antonuk, {Larry E.} and Youcef El-Mohri and Larry Hu and Hong Du and Amit Sawant and Yixin Li and Yi Wang and Jin Yamamoto and Qihua Zhao",
year = "2005",
month = "6",
day = "21",
doi = "10.1088/0031-9155/50/12/012",
language = "English (US)",
volume = "50",
pages = "2907--2928",
journal = "Physics in Medicine and Biology",
issn = "0031-9155",
publisher = "IOP Publishing Ltd.",
number = "12",

}

TY - JOUR

T1 - Systematic investigation of the signal properties of polycrystalline HgI2 detectors under mammographic, radiographic, fluoroscopic and radiotherapy irradiation conditions

AU - Su, Zhong

AU - Antonuk, Larry E.

AU - El-Mohri, Youcef

AU - Hu, Larry

AU - Du, Hong

AU - Sawant, Amit

AU - Li, Yixin

AU - Wang, Yi

AU - Yamamoto, Jin

AU - Zhao, Qihua

PY - 2005/6/21

Y1 - 2005/6/21

N2 - The signal properties of polycrystalline mercuric iodide (HgI2) film detectors, under irradiation conditions relevant to mammographic, radiographic, fluoroscopic and radiotherapy x-ray imaging, are reported. Each film detector consists of an ∼230 to ∼460 μM thick layer of HgI 2 (fabricated through physical vapour deposition or a screen-print process) and a thin barrier layer, sandwiched between a pair of opposing electrode plates. The high atomic number, high density and low effective ionization energy, WEFF, of HgI2 make it an attractive candidate for significantly improving the performance of active matrix, flat-panel imagers (AMFPIs) for several x-ray imaging applications. The temporal behaviour of current from the film detectors in the presence and in the absence of radiation was used to examine dark current levels, the lag and reciprocity of the signal response, x-ray sensitivity and WEFF. The results are discussed in the context of present AMFPI performance. This study provides performance data for a wide range of potential medical x-ray imaging applications from a single set of detectors and represents the first investigation of the signal properties of polycrystalline mercuric iodide for the radiotherapy application.

AB - The signal properties of polycrystalline mercuric iodide (HgI2) film detectors, under irradiation conditions relevant to mammographic, radiographic, fluoroscopic and radiotherapy x-ray imaging, are reported. Each film detector consists of an ∼230 to ∼460 μM thick layer of HgI 2 (fabricated through physical vapour deposition or a screen-print process) and a thin barrier layer, sandwiched between a pair of opposing electrode plates. The high atomic number, high density and low effective ionization energy, WEFF, of HgI2 make it an attractive candidate for significantly improving the performance of active matrix, flat-panel imagers (AMFPIs) for several x-ray imaging applications. The temporal behaviour of current from the film detectors in the presence and in the absence of radiation was used to examine dark current levels, the lag and reciprocity of the signal response, x-ray sensitivity and WEFF. The results are discussed in the context of present AMFPI performance. This study provides performance data for a wide range of potential medical x-ray imaging applications from a single set of detectors and represents the first investigation of the signal properties of polycrystalline mercuric iodide for the radiotherapy application.

UR - http://www.scopus.com/inward/record.url?scp=20044366553&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=20044366553&partnerID=8YFLogxK

U2 - 10.1088/0031-9155/50/12/012

DO - 10.1088/0031-9155/50/12/012

M3 - Article

C2 - 15930610

AN - SCOPUS:20044366553

VL - 50

SP - 2907

EP - 2928

JO - Physics in Medicine and Biology

JF - Physics in Medicine and Biology

SN - 0031-9155

IS - 12

ER -