Computer-aided detection (CAD) schemes are decision making support tools, useful to overcome limi... more Computer-aided detection (CAD) schemes are decision making support tools, useful to overcome limitations of problematic clinical procedures. Trans-rectal ultrasound image based CAD would be extremely important to support prostate cancer diagnosis. An effective approach to realize a CAD scheme for this purpose is described in this work, employing a multi-feature kernel classification model based on generalized discriminant analysis. The mutual information of feature value and tissue pathological state is used to select features essential for tissue characterization. System-dependent effects are reduced through predictive deconvolution of the acquired radio-frequency signals. A clinical study, performed on ground truth images from biopsy findings, provides a comparison of the classification model applied before and after deconvolution, showing in the latter case a significant gain in accuracy and area under the receiver operating characteristic curve.
CNNA '92 Proceedings Second International Workshop on Cellular Neural Networks and Their Applications, 1992
The design of an analog programmable CNN architecture with low-power dissipation in a 1.5-μm CMOS... more The design of an analog programmable CNN architecture with low-power dissipation in a 1.5-μm CMOS technology is presented. After discussing the design of basic building blocks, the electrical performance of a 10Ă—10 CMOS CNN, consisting of about 8000 MOS transistors, fully simulated at the device level, which can be analog-programmed by varying an external control voltage is discussed. The CNN can perform such functions as noise removal, hole filter, shadow detector, connected component recognition, and edge detector. The power consumption of the circuit is about 60 mW, which is about 1/3 of the power consumption of a previously reported nonprogrammable circuit
1986 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1986
ABSTRACT A comparison of the step response of a MOSFET predicted by a simplified non-quasistatic ... more ABSTRACT A comparison of the step response of a MOSFET predicted by a simplified non-quasistatic model with the results of detailed numerical simulations will be presented. The sources of error will be detailed. The model afforded greater efficiency in circuit simulation.
ABSTRACT A novel signal compression and reconstruction procedure suitable for guided wave based s... more ABSTRACT A novel signal compression and reconstruction procedure suitable for guided wave based structural health monitoring (SHM) applications is presented. The proposed approach combines the wavelet packet transform and frequency warping to generate a sparse decomposition of the acquired dispersive signal. The sparsity of the signal in the considered representation is exploited to develop data compression strategy based on the Best-Basis Compressive sensing (CS) theory. The proposed data compression strategy has been compared with the transform encoder based on the Embedded Zerotree (EZT), a well known data compression algorithm. These approaches are tested on experimental Lamb wave signals obtained by acquiring acoustic emissions in a aluminum plate with conventional piezoelectric sensors. The performances of the two methods are analyzed by varying the compression ratio in the range 40–80%, and measuring the discrepancy between the original and the reconstructed signal. Results show the improvement in signal reconstruction with the use of the modified CS framework with respect to transform-encoders such as the EZT algorithm with Huffman coding.
1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96, 1996
A new DC model for five-terminals bipolar devices used in advanced smart-power applications is pr... more A new DC model for five-terminals bipolar devices used in advanced smart-power applications is presented. The model accounts for all parasitic effects associated with four-junction structures, enables an easy procedure for parameters extraction and favourably compares with experimental data on both simple devices and complex ICs
ABSTRACT A new scheme for an integrated NMOS dynamic differential stage is presented. The stage e... more ABSTRACT A new scheme for an integrated NMOS dynamic differential stage is presented. The stage exhibits low power consumption, occupies a small die area, has a voltage gain dependent only on one capacitance ratio, and it can be used as a building block for sampled-data filters. The basic principle of operation of the stage is firstly presented, then the main characteristics and limitations are discussed and compared with experimental results.
Computer-aided detection (CAD) schemes are decision making support tools, useful to overcome limi... more Computer-aided detection (CAD) schemes are decision making support tools, useful to overcome limitations of problematic clinical procedures. Trans-rectal ultrasound image based CAD would be extremely important to support prostate cancer diagnosis. An effective approach to realize a CAD scheme for this purpose is described in this work, employing a multi-feature kernel classification model based on generalized discriminant analysis. The mutual information of feature value and tissue pathological state is used to select features essential for tissue characterization. System-dependent effects are reduced through predictive deconvolution of the acquired radio-frequency signals. A clinical study, performed on ground truth images from biopsy findings, provides a comparison of the classification model applied before and after deconvolution, showing in the latter case a significant gain in accuracy and area under the receiver operating characteristic curve.
CNNA '92 Proceedings Second International Workshop on Cellular Neural Networks and Their Applications, 1992
The design of an analog programmable CNN architecture with low-power dissipation in a 1.5-μm CMOS... more The design of an analog programmable CNN architecture with low-power dissipation in a 1.5-μm CMOS technology is presented. After discussing the design of basic building blocks, the electrical performance of a 10Ă—10 CMOS CNN, consisting of about 8000 MOS transistors, fully simulated at the device level, which can be analog-programmed by varying an external control voltage is discussed. The CNN can perform such functions as noise removal, hole filter, shadow detector, connected component recognition, and edge detector. The power consumption of the circuit is about 60 mW, which is about 1/3 of the power consumption of a previously reported nonprogrammable circuit
1986 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1986
ABSTRACT A comparison of the step response of a MOSFET predicted by a simplified non-quasistatic ... more ABSTRACT A comparison of the step response of a MOSFET predicted by a simplified non-quasistatic model with the results of detailed numerical simulations will be presented. The sources of error will be detailed. The model afforded greater efficiency in circuit simulation.
ABSTRACT A novel signal compression and reconstruction procedure suitable for guided wave based s... more ABSTRACT A novel signal compression and reconstruction procedure suitable for guided wave based structural health monitoring (SHM) applications is presented. The proposed approach combines the wavelet packet transform and frequency warping to generate a sparse decomposition of the acquired dispersive signal. The sparsity of the signal in the considered representation is exploited to develop data compression strategy based on the Best-Basis Compressive sensing (CS) theory. The proposed data compression strategy has been compared with the transform encoder based on the Embedded Zerotree (EZT), a well known data compression algorithm. These approaches are tested on experimental Lamb wave signals obtained by acquiring acoustic emissions in a aluminum plate with conventional piezoelectric sensors. The performances of the two methods are analyzed by varying the compression ratio in the range 40–80%, and measuring the discrepancy between the original and the reconstructed signal. Results show the improvement in signal reconstruction with the use of the modified CS framework with respect to transform-encoders such as the EZT algorithm with Huffman coding.
1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96, 1996
A new DC model for five-terminals bipolar devices used in advanced smart-power applications is pr... more A new DC model for five-terminals bipolar devices used in advanced smart-power applications is presented. The model accounts for all parasitic effects associated with four-junction structures, enables an easy procedure for parameters extraction and favourably compares with experimental data on both simple devices and complex ICs
ABSTRACT A new scheme for an integrated NMOS dynamic differential stage is presented. The stage e... more ABSTRACT A new scheme for an integrated NMOS dynamic differential stage is presented. The stage exhibits low power consumption, occupies a small die area, has a voltage gain dependent only on one capacitance ratio, and it can be used as a building block for sampled-data filters. The basic principle of operation of the stage is firstly presented, then the main characteristics and limitations are discussed and compared with experimental results.
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Papers by guido masetti