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Photon-counting radiography with the gas microstrip detector
| Content Provider | Scilit |
|---|---|
| Author | Gobbi, David G. Dixit, Madhu S. Dubeau, Jacques Johns, Paul C. |
| Copyright Year | 1999 |
| Description | Journal: Physics in Medicine & Biology We have built a proof-of-concept photon-counting x-ray imaging system using a $Xe:CH_{4}$ gas microstrip detector (GMD) as the image receptor, and have used this system to demonstrate several advantages of photon counting over energy integration. Our experiments spanned x-ray spectra from 10 to 50 kVp and $Xe:CH_{4}$ pressures from 1 to 4 atm. When photon counting is done, the energy deposited in the detector by each incident photon can be measured on adjacent anode strips and a centroid calculation can be used to provide spatial resolution significantly better than the anode strip pitch. We measured >11 lp $mm^{-1}$ at 13 kVp with our 200 µm pitch detector, and 8.2 lp $mm^{-1}$ at 50 kVp. The energy resolution of our GMD is 5.2% at 59.6 keV, and the space-charge limited counting rate is >2 × $10^{6}$ $mm^{-2}$ $s^{-1}$ at 3 atm for a 30 kVp beam. |
| Related Links | https://iopscience.iop.org/article/10.1088/0031-9155/44/5/317/pdf |
| Ending Page | 1335 |
| Page Count | 19 |
| Starting Page | 1317 |
| ISSN | 00319155 |
| e-ISSN | 13616560 |
| DOI | 10.1088/0031-9155/44/5/317 |
| Journal | Physics in Medicine & Biology |
| Issue Number | 5 |
| Volume Number | 44 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1999-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Physics in Medicine & Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Radiological and Ultrasound Technology |
