A pixellated γ-camera based on CdTe detectors clinical interests and performances

Chambron, J.; Arntz, Y; Eclancher, Bernard; Scheiber, C.; Siffert, P.; Hali, M Hage; Regal, R.; Kazandjian, A.; Prat, Vincent; Thomas, S.L.; Warren, S.; Matz, R.; Jahnke, Andreas; Kármán, M; Pszota, A; Németh, Làszló

doi:10.1016/s0168-9002(00)00285-0

Cited by 18 publications

(11 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lack of energy resolution is ascribed to the presence of charge sharing between pixels at such a low level of pixel pitch ͑55 m͒. A higher pitch ͑e.g., 110 m͒ would help limit this adverse effect while still preserving high intrinsic spatial resolution, 31 and indeed a CdTe detector of the Medipix2 series similar to the one tested here but with a pitch of 110 m has been realized ͑data not shown͒.…”

Section: Figmentioning

confidence: 92%

“…This detector showed 70% intrinsic detection efficiency in the photopeak at 122 keV, with an energy window of Ϯ6.5%. 30 A European consortium including CNRS ͑Strasbourg, France͒, University of Strasbourg, CLRC ͑Rutherford Appleton Laboratory, Didcot, UK͒, and the firms Eurorad ͑Strasbourg, France͒ and Siemens AG-CRD ͑Munich, Germany͒ developed a mobile gamma camera dedicated to nuclear cardiology 31 based on a 48ϫ 48 detection matrix of 2 mm thick, independent square pixel CdTe detectors with 3.07 mm pitch, assembled in 3 ϫ 3 units each of 15ϫ 15 for an active area of 15ϫ 15 cm 2 . The detector showed an energy resolution of 5% FWHM at 122 keV, a detection efficiency of 25% at 140 keV, and an estimated intrinsic spatial resolution of 3.68 mm.…”

Section: Ib Cdte Based Compact Gamma Camerasmentioning

confidence: 99%

“…The detector showed an energy resolution of 5% FWHM at 122 keV, a detection efficiency of 25% at 140 keV, and an estimated intrinsic spatial resolution of 3.68 mm. 31 Compact gamma cameras using 5 mm thick CdTe detectors have been produced 25,32 and commercialized by ACRORAD Co. ͑Okinawa, Japan͒ ͑model MGC1500͒ but, rather than using a thick substrate pixel detector, they use a side-on irradiation geometry of thin ͑ϳ1 mm͒ substrates. In this geometry, which uses individual fingerlike semiconductor crystals, area coverage is achieved by stacking rows of linear arrays of single detector elements spaced a fraction of a millimeter apart.…”

Section: Ib Cdte Based Compact Gamma Camerasmentioning

confidence: 99%

See 2 more Smart Citations

Imaging performance comparison between a scintillator based and a CdTe semiconductor based photon counting compact gamma camera

et al. 2009

View full text Add to dashboard Cite

The authors report on the performance of two small field of view, compact gamma cameras working in single photon counting in planar imaging tests at 122 and 140 keV. The first camera is based on a LaBr3: Ce scintillator continuous crystal (49 x 49 x 5 mm3) assembled with a flat panel multianode photomultiplier tube with parallel readout. The second one belongs to the class of semiconductor hybrid pixel detectors, specifically, a CdTe pixel detector (14 x 14 x 1 mm3) with 256 x 256 square pixels and a pitch of 55 microm, read out by a CMOS single photon counting integrated circuit of the Medipix2 series. The scintillation camera was operated with selectable energy window while the CdTe camera was operated with a single low-energy detection threshold of about 20 keV, i.e., without energy discrimination. The detectors were coupled to pinhole or parallel-hole high-resolution collimators. The evaluation of their overall performance in basic imaging tasks is presented through measurements of their detection efficiency, intrinsic spatial resolution, noise, image SNR, and contrast recovery. The scintillation and CdTe cameras showed, respectively, detection efficiencies at 122 keV of 83% and 45%, intrinsic spatial resolutions of 0.9 mm and 75 microm, and total background noises of 40.5 and 1.6 cps. Imaging tests with high-resolution parallel-hole and pinhole collimators are also reported.

show abstract

Section: Figmentioning

confidence: 92%

Section: Ib Cdte Based Compact Gamma Camerasmentioning

confidence: 99%

Section: Ib Cdte Based Compact Gamma Camerasmentioning

confidence: 99%

See 1 more Smart Citation

Imaging performance comparison between a scintillator based and a CdTe semiconductor based photon counting compact gamma camera

et al. 2009

View full text Add to dashboard Cite

show abstract

“…14 and 18͔͒. Matrices of segmented or continuous scintillator crystals [19][20][21][22][23][24][25] or semiconductor crystals [26][27][28][29][30][31][32][33][34][35] have been used for assembling gamma-ray imaging probes; representative data are indicated in Table I.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a CdTe semiconductor based compact gamma camera for sentinel lymph node imaging

et al. 2011

View full text Add to dashboard Cite

The laboratory performance of this imaging probe is limited by the pinhole collimator performance and the necessity of working in minification due to the limited detector size. However, in clinical operative conditions, the CdTe imaging probe was effective in detecting SLNs with adequate resolution and an acceptable sensitivity. Sensitivity is expected to improve with the future availability of a larger CdTe detector permitting operation at shorter distances from the patient skin.

show abstract

“…LETI [3] is developing a camera based on discrete CdZnTe detectors of dimensions 4 mm 4 mm and 6 mm thickness. CNRS, Eurorad, and other groups are developing a camera based on CdTe discrete detectors of dimensions 2.8 mm 2.8 mm and 2 mm thick [4], [5]. Recently, phantom imaging results were reported for a camera based on 5-mm-thick CdZnTe detectors with 2.5 mm 2.5 mm pixels [6].…”

Section: Introductionmentioning

confidence: 99%

NUCAM3-a gamma camera based on segmented monolithic CdZnTe detectors

Mardor

Shor

Baum

et al. 2002

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

NUCAM3 is the latest generation of solid-state pixelated gamma cameras developed at Soreq NRC. The NUCAM3 head is based on segmented pad monolithic CdZnTe detectors that currently provide a useful field of view of 18.5 cm 20.1 cm. The camera is designed for cardiac SPECT, breast scintimammography, thyroid, and other small organ evaluation. The camera contains 528 detectors. Each detector is 5 mm thick and is divided to a matrix of 16 square pixels, with a pitch of 2.1 mm. The use of pixelated CdZnTe detectors and low-noise electronics provides a camera with an average energy resolution of 4.5% full width half maximum (FWHM) at 140.5 keV and 9.5% FWHM at 59.6 keV and an intrinsic spatial resolution of 2.1 mm, regardless of the photon energy. We present the analysis of over 1300 CdZnTe monolithic detectors, the physical and imaging characteristics of the NUCAM3 camera and their comparison to state of the art Anger cameras. We show the advantages of CdZnTe technology, which are due to the camera pixel structure and superior energy resolution. These advantages lead to better detectability of small size cold and hot lesions in a scatter environment.

show abstract

A pixellated γ-camera based on CdTe detectors clinical interests and performances

Cited by 18 publications

References 3 publications

Imaging performance comparison between a scintillator based and a CdTe semiconductor based photon counting compact gamma camera

Imaging performance comparison between a scintillator based and a CdTe semiconductor based photon counting compact gamma camera

Evaluation of a CdTe semiconductor based compact gamma camera for sentinel lymph node imaging

NUCAM3-a gamma camera based on segmented monolithic CdZnTe detectors

Contact Info

Product

Resources

About