TY - GEN
T1 - Comparative study of two flat-panel X-Ray detectors applied to small-animal imaging cone-beam micro-CT
AU - Sisniega, Alejandro
AU - Vaquero, Juan José
AU - Lage, Eduardo
AU - Carlos, Álvaro De
AU - Villena, José L.
AU - Abella, Mónica
AU - Vidal, Irina
AU - Tapias, Gustavo
AU - Antoranz, Jose Carlos
AU - Desco, Manuel
PY - 2008
Y1 - 2008
N2 - This work compares two different X-ray flat-panel detectors for its use in high-speed, cone-beam CT applied to small-animal imaging. The main differences between these two devices are the scintillators and the achievable frame rate. Both devices have been tested in terms of system linearity, sensitivity, resolution, stability and noise properties, taking into account the different timing schemes for each one of them and the mandatory corrections on the raw data. Tomographic scans have been carried out using both detectors to evaluate its final performance as well as the delivered dose needed to achieve similar quality scans. An experimental cone-beam CT test-bench has been designed and implemented to perform the different measurements. It uses a micro-focus X-ray source and a rotating stage where the samples are placed. A modified FDK algorithm has been used to reconstruct the acquired data. Both detectors show similar results for pixel linearity and stability measurements, and their noise levels are comparable. The resolution and sensitivity features are better for the direct grown scintillator detector (9 Ipmm vs. 6 Ipmm, and ∼4 times more sensitive for similar delivered dose). Since tomographic reconstructed images for the higher frame-rate detector show acceptable quality, it can be used to implement a faster system for high-speed acquisition techniques like, for example, dynamic imaging or gated protocols.
AB - This work compares two different X-ray flat-panel detectors for its use in high-speed, cone-beam CT applied to small-animal imaging. The main differences between these two devices are the scintillators and the achievable frame rate. Both devices have been tested in terms of system linearity, sensitivity, resolution, stability and noise properties, taking into account the different timing schemes for each one of them and the mandatory corrections on the raw data. Tomographic scans have been carried out using both detectors to evaluate its final performance as well as the delivered dose needed to achieve similar quality scans. An experimental cone-beam CT test-bench has been designed and implemented to perform the different measurements. It uses a micro-focus X-ray source and a rotating stage where the samples are placed. A modified FDK algorithm has been used to reconstruct the acquired data. Both detectors show similar results for pixel linearity and stability measurements, and their noise levels are comparable. The resolution and sensitivity features are better for the direct grown scintillator detector (9 Ipmm vs. 6 Ipmm, and ∼4 times more sensitive for similar delivered dose). Since tomographic reconstructed images for the higher frame-rate detector show acceptable quality, it can be used to implement a faster system for high-speed acquisition techniques like, for example, dynamic imaging or gated protocols.
UR - http://www.scopus.com/inward/record.url?scp=67649196801&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67649196801&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2008.4774118
DO - 10.1109/NSSMIC.2008.4774118
M3 - Conference contribution
AN - SCOPUS:67649196801
SN - 9781424427154
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 3836
EP - 3840
BT - 2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
T2 - 2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
Y2 - 19 October 2008 through 25 October 2008
ER -