It is well known that a monochromatic X-ray source with an energy optimized for the organ thickness to be imaged could result in a better image quality in transmission radiology. In this paper we present the preliminary investigation for the implementation of this technique in computer tomography (CT) imaging. The detection system is based on a 1 mm thick silicon pixel detector bump bonded to a VLSI read-out, Medipix2. This detector ensures a good detection efficiency (46%) in the used energy range (60 kVp) with a good spatial resolution that arises from a 55 μm square pixel. The Medipix2 read-out electronics is not only a single photon counting system, but has also the capability of dual-energy threshold, that allows us to detect only photons that are in a chosen energy window. In this paper we present the results obtained in CT imaging of small samples, by selecting various energy windows within a standard X-ray tube spectrum so as to maximize the differentiation between significant attenuation coefficients. This study is preliminary for a future development of a dual-energy CT that could add functional information to the morphological information that is obtained in a CT examination.

A preliminary study of the advantages of X-ray energy selection in CT imaging / V., Rosso; N., Belcari; Mg, Bisogni; C., Carpentieri; A., DEL GUERRA; P., Delogu; Me, Fantacci; Mettivier, Giovanni; Montesi, MARIA CRISTINA; D., Panetta; M., Quattrocchi; Russo, Paolo; A., Stefanini. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 572:1(2007), pp. 270-273. [10.1016/j.nima.2006.10.365]

A preliminary study of the advantages of X-ray energy selection in CT imaging

METTIVIER, GIOVANNI;MONTESI, MARIA CRISTINA;RUSSO, PAOLO;
2007

Abstract

It is well known that a monochromatic X-ray source with an energy optimized for the organ thickness to be imaged could result in a better image quality in transmission radiology. In this paper we present the preliminary investigation for the implementation of this technique in computer tomography (CT) imaging. The detection system is based on a 1 mm thick silicon pixel detector bump bonded to a VLSI read-out, Medipix2. This detector ensures a good detection efficiency (46%) in the used energy range (60 kVp) with a good spatial resolution that arises from a 55 μm square pixel. The Medipix2 read-out electronics is not only a single photon counting system, but has also the capability of dual-energy threshold, that allows us to detect only photons that are in a chosen energy window. In this paper we present the results obtained in CT imaging of small samples, by selecting various energy windows within a standard X-ray tube spectrum so as to maximize the differentiation between significant attenuation coefficients. This study is preliminary for a future development of a dual-energy CT that could add functional information to the morphological information that is obtained in a CT examination.
2007
A preliminary study of the advantages of X-ray energy selection in CT imaging / V., Rosso; N., Belcari; Mg, Bisogni; C., Carpentieri; A., DEL GUERRA; P., Delogu; Me, Fantacci; Mettivier, Giovanni; Montesi, MARIA CRISTINA; D., Panetta; M., Quattrocchi; Russo, Paolo; A., Stefanini. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 572:1(2007), pp. 270-273. [10.1016/j.nima.2006.10.365]
File in questo prodotto:
File Dimensione Formato  
preliminary 2007.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Accesso privato/ristretto
Dimensione 121.88 kB
Formato Adobe PDF
121.88 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/201735
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 5
social impact