ajat cdte.pdf - PROFI - dental equipment
ajat cdte.pdf - PROFI - dental equipment
ajat cdte.pdf - PROFI - dental equipment
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Innovative CdTe Sensor Technology<br />
Direct Conversion<br />
X-ray absorption efficiency (typical material thicknesses)<br />
Innovative CdTe sensor technology converts X-rays<br />
directly to electronic signals. Since X-rays are not<br />
converted into light, less blurring occurs and picture<br />
clarity and contrast are greatly enhanced.<br />
Absorbtion<br />
1<br />
0,8<br />
0,6<br />
GaAs<br />
CdTe<br />
0,4<br />
0,2<br />
0<br />
Si CsI<br />
Se<br />
0 20 40 60 80<br />
X-ray energy/keV<br />
CdTe-CMOS DQE<br />
90 kV X -ray beam<br />
CdTe-CMOS MTF<br />
90 kV X -ray beam<br />
DQE<br />
1<br />
Theoretical max DQE<br />
Measured DQE<br />
MTF<br />
1<br />
Theoretical max MTF<br />
Measured MTF<br />
0,5<br />
0,5<br />
0<br />
0<br />
0 2 4 6 8 10<br />
0 2 4 6 8 10<br />
lp/mm<br />
90 kV X -ray beam<br />
lp/mm<br />
CdTe Sensor Technology vs. Conventional CCD / CMOS / Flat Panels<br />
Ajat CdTe-Sensor<br />
CCD/ CMOS<br />
X-rays<br />
X-rays<br />
CdTe<br />
(X-rays converted to<br />
electrical signals)<br />
Electric circuit<br />
Sharp Image<br />
Photosphor Screen<br />
(X-rays converted to light)<br />
Optical lens<br />
Electric circuit<br />
Image
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