High spatial resolution, small Field Of View (FOV), fully portable scintillation cameras are lower cost and obviously lower weight than large FOV, not transportable Anger gamma cameras. Portable cameras allow easy transfer of the detector, thus of radioisotope imaging, where the bioptical procedure takes place. In this paper we describe a preliminary experience on radionuclide Breast Cancer (BC) imaging with a 22.8 x 22.8 mm(2) FOV minicamera, already used by our group for sentinel node detection with the name of Imaging Probe (IP). In this work IP BC detection was performed with the aim of guiding biopsy, in particular open biopsy, or to help or modify fine needle or needle addressing when main driving method was echography or digital radiography. The IP prototype weight was about I kg. This small scintillation camera is based on the compact Position Sensitive Photomultiplier Tube Hamamatsu R7600-00-C8, coupled to a CsI(TI) scintillation array 2.6 x 2.6 x 5.0 mm(3) crystal-pixel size. Spatial resolution of the IP was 2.5 mm Full-Width at Half-Maximum at laboratory tests. IP was provided with acquisition software allowing quick change of pixels number on the computer acquisition frame and an on-line image-smoothing program. Both these programs were developed in order to allow nuclear physicians to quickly get target source when the patient was anesthetized in the operator room, with sterile conditions. Tc-99m Sestamibi (MIBI) was injected at the dose of 740 MBq 1 h before imaging and biopsy to 14 patients with suspicious or known BC. Scintigraphic images were acquired before and after biopsy in each patient. Operator was allowed to take into account scintigraphic images as well as previously performed X-ray mammograms and echographies. High-resolution IP images were able to guide biopsy toward cancer or washout zones of the cancer, that are thought to be chemoresistant in 7 patients out of 10. Four patients, in whom IP and MIBI were not able to guide biopsy, did not show cancer. Two patients in whom biopsy was performed in the high washout zone, did show Multi Drug Resistance (MDR) gene product at immunohistochemistry on bioptical samples. Specific radioactivity was measured on biopsy specimens and measurement confirmed the etherogeneous distribution of MIBI within cancers. Our study confirms the ability of IP to guide breast biopsy even when our mini-camera has to be manually handled by trained physicians during operation. (C) 2002 Elsevier Science B.V. All rights reserved.

Imaging probe for breast cancer localization / Soluri, A.; Scafe, R.; Capoccetti, F.; Burgio, N.; Schiaratura, A.; Pani, Roberto; Pellegrini, Rosanna; Cinti, Maria Nerina; Mechella, M.; Amanti, A.; David, V.; Scopinaro, Francesco. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 497:1(2003), pp. 114-121. (Intervento presentato al convegno 1st Topical Symposium on Functional Breast Imaging with Advanced Detectors tenutosi a ROME, ITALY nel APR 18-21, 2001) [10.1016/s0168-9002(02)01900-9].

Imaging probe for breast cancer localization

N. Burgio;PANI, Roberto;PELLEGRINI, Rosanna;CINTI, Maria Nerina;A. Amanti;SCOPINARO, Francesco
2003

Abstract

High spatial resolution, small Field Of View (FOV), fully portable scintillation cameras are lower cost and obviously lower weight than large FOV, not transportable Anger gamma cameras. Portable cameras allow easy transfer of the detector, thus of radioisotope imaging, where the bioptical procedure takes place. In this paper we describe a preliminary experience on radionuclide Breast Cancer (BC) imaging with a 22.8 x 22.8 mm(2) FOV minicamera, already used by our group for sentinel node detection with the name of Imaging Probe (IP). In this work IP BC detection was performed with the aim of guiding biopsy, in particular open biopsy, or to help or modify fine needle or needle addressing when main driving method was echography or digital radiography. The IP prototype weight was about I kg. This small scintillation camera is based on the compact Position Sensitive Photomultiplier Tube Hamamatsu R7600-00-C8, coupled to a CsI(TI) scintillation array 2.6 x 2.6 x 5.0 mm(3) crystal-pixel size. Spatial resolution of the IP was 2.5 mm Full-Width at Half-Maximum at laboratory tests. IP was provided with acquisition software allowing quick change of pixels number on the computer acquisition frame and an on-line image-smoothing program. Both these programs were developed in order to allow nuclear physicians to quickly get target source when the patient was anesthetized in the operator room, with sterile conditions. Tc-99m Sestamibi (MIBI) was injected at the dose of 740 MBq 1 h before imaging and biopsy to 14 patients with suspicious or known BC. Scintigraphic images were acquired before and after biopsy in each patient. Operator was allowed to take into account scintigraphic images as well as previously performed X-ray mammograms and echographies. High-resolution IP images were able to guide biopsy toward cancer or washout zones of the cancer, that are thought to be chemoresistant in 7 patients out of 10. Four patients, in whom IP and MIBI were not able to guide biopsy, did not show cancer. Two patients in whom biopsy was performed in the high washout zone, did show Multi Drug Resistance (MDR) gene product at immunohistochemistry on bioptical samples. Specific radioactivity was measured on biopsy specimens and measurement confirmed the etherogeneous distribution of MIBI within cancers. Our study confirms the ability of IP to guide breast biopsy even when our mini-camera has to be manually handled by trained physicians during operation. (C) 2002 Elsevier Science B.V. All rights reserved.
2003
breast cancer; imaging probe; position sensitive photomultiplier tube; radiotracers
01 Pubblicazione su rivista::01a Articolo in rivista
Imaging probe for breast cancer localization / Soluri, A.; Scafe, R.; Capoccetti, F.; Burgio, N.; Schiaratura, A.; Pani, Roberto; Pellegrini, Rosanna; Cinti, Maria Nerina; Mechella, M.; Amanti, A.; David, V.; Scopinaro, Francesco. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 497:1(2003), pp. 114-121. (Intervento presentato al convegno 1st Topical Symposium on Functional Breast Imaging with Advanced Detectors tenutosi a ROME, ITALY nel APR 18-21, 2001) [10.1016/s0168-9002(02)01900-9].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/364549
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