Volume 33, Issue 11 p. 4210-4220
Radiation imaging physics

Performance tests of two portable mini gamma cameras for medical applications

F. Sánchez

F. Sánchez

Instituto de Física Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

Electronic mail: [email protected]

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M. M. Fernández

M. M. Fernández

Instituto de Física Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

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M. Giménez

M. Giménez

Instituto de Física Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

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J. M. Benlloch

J. M. Benlloch

Instituto de Física Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

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M. J. Rodríguez-Alvarez

M. J. Rodríguez-Alvarez

IMM, Univ. Politécnica de Valencia, Camí de Vera s/n, Valencia, Spain

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F. García de Quirós

F. García de Quirós

Instituto de Fisica Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

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Ch. W. Lerche

Ch. W. Lerche

Instituto de Fisica Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

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N. Pavón

N. Pavón

Instituto de Fisica Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

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J. A. Palazón

J. A. Palazón

Instituto de Fisica Corpuscular (CSIC-UV), Edificio Institutos de Paterna, P.O. Box 22085, E-46071, Valencia, Spain

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J. Martínez

J. Martínez

Dpto. Ingeniería Electrónica, Univ. Politécnica de Valencia, Camí de Vera s/n, Valencia, Spain

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A. Sebastiá

A. Sebastiá

Dpto. Ingeniería Electrónica, Univ. Politécnica de Valencia, Camí de Vera s/n, Valencia, Spain

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First published: 19 October 2006
Citations: 52

Abstract

We have developed two prototypes of portable gamma cameras for medical applications based on a previous prototype designed and tested by our group. These cameras use a urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0001 continuous scintillation crystal coupled to the new flat-panel-type multianode position-sensitive photomultiplier tube, H8500 from Hamamatsu Photonics. One of the prototypes, mainly intended for intrasurgical use, has a field of view of urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0002, and weighs urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0003. Its intrinsic resolution is better than urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0004 and its energy resolution is about 13% at urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0005. The second prototype, mainly intended for osteological, renal, mammary, and endocrine (thyroid, parathyroid, and suprarenal) scintigraphies, weighs a total of urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0006. Its average spatial resolution is urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0007; it has a field of view of urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0008, with an energy resolution of about 15% at urn:x-wiley:0094-2405:media:mp8199:mp8199-math-0009. The main advantages of these gamma camera prototypes with respect to those previously reported in the literature are high portability and low weight, with no significant loss of sensitivity and spatial resolution. All the electronic components are packed inside the mini gamma cameras, and no external electronic devices are required. The cameras are only connected through the universal serial bus port to a portable PC. In this paper, we present the design of the cameras and describe the procedures that have led us to choose their configuration together with the most important performance features of the cameras. For one of the prototypes, clinical tests on melanoma patients are presented and images are compared with those obtained with a conventional camera.