A novel method for the gain conversion factor estimation in quality assessment of ultrasound diagnostic systems

Fiori, Giorgia; Scorza, Andrea; Schmid, Maurizio; Galo, Jan; Conforto, Silvia; Sciuto, Salvatore Andrea

doi:10.1109/memea54994.2022.9856491

Cited by 5 publications

(16 citation statements)

References 14 publications

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“…where g is the smallest gray level difference perceivable by the human eye [19], [21], [22], Ls is the maximum luminance level, and  is the maximum sensitivity of the US system. The latter is obtained by applying the following steps [19]:…”

Section: A Adaptive Snr Threshold Methodsmentioning

confidence: 99%

“…Furthermore, based on the considerations discussed in [19], an accurate estimation of DOP can be performed by setting a ROI width of 30 px (3-5 mm for the linear array probe, 7-11 mm for the phased one, and 8-11 mm for the convex one). Monte Carlo Simulation (MCS) was chosen for AdSTM testing, as several studies in the literature [24]- [28] testify that it is a powerful tool for evaluating the uncertainty of softwarebased measurements and the extent of their robustness.…”

Section: Parameter Settingmentioning

confidence: 99%

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A Comparative Study on Depth of Penetration Measurements in Diagnostic Ultrasounds Through the Adaptive SNR Threshold Method

Fiori

Fuiano

Schmid

et al. 2023

IEEE Trans. Instrum. Meas.

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Depth Of Penetration (DOP) has been investigated in the scientific literature as an informative parameter able to monitor over time both the sensitivity and the general performance of ultrasound (US) diagnostic systems. In common practice, this parameter may suffer from operator-related errors due to its visual assessment. Different image analysis algorithms have been proposed in the literature to address this issue. In this regard, the present work evaluates the Adaptive SNR Threshold Method (AdSTM) on six US diagnostic systems equipped with three US probe models, operating at four frequencies. Data were collected from a US phantom with two distinct zones with different attenuation coefficients. The AdSTM results were compared to the outcomes provided by the Naked Eye Method (NEM), which was performed by 5 non-medical observers. Despite the small population sample of observers, the obtained results were generally consistent across methods, and suggest the implementation of a calibration procedure for AdSTM, and a more extensive testing.

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Section: A Adaptive Snr Threshold Methodsmentioning

confidence: 99%

Section: Parameter Settingmentioning

confidence: 99%

A Comparative Study on Depth of Penetration Measurements in Diagnostic Ultrasounds Through the Adaptive SNR Threshold Method

Fiori

Fuiano

Schmid

et al. 2023

IEEE Trans. Instrum. Meas.

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“…The bounding box containing the diagnostic image is extracted (excluding patient and settings details) and then processed by a threshold-based filter in order to remove the B-mode information and leave the CD information only [41][42][43], as shown in Figure 3. These processing steps are applied to all the sampled frames.…”

Section: Filtering and Segments Positioningmentioning

confidence: 99%

A Novel Equivalent Time Sampling-Based Method for Pulse Transit Time Estimation with Applications into the Cardiovascular Disease Diagnosis

Fiori

Fuiano

Conforto

et al. 2023

Sensors

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The increasing incidence of cardiovascular diseases (CVDs) is reflected in additional costs for healthcare systems all over the world. To date, pulse transit time (PTT) is considered a key index of cardiovascular health status and for diagnosis of CVDs. In this context, the present study focuses on a novel image analysis-based method for PTT estimation through the application of equivalent time sampling. The method, which post-processes color Doppler videos, was tested on two different setups: a Doppler flow phantom set in pulsatile mode and an in-house arterial simulator. In the former, the Doppler shift was due to the echogenic properties of the blood mimicking fluid only, since the phantom vessels are non-compliant. In the latter, the Doppler signal relied on the wall movement of compliant vessels in which a fluid with low echogenic properties was pumped. Therefore, the two setups allowed the measurement of the flow average velocity (FAV) and the pulse wave velocity (PWV), respectively. Data were collected through an ultrasound diagnostic system equipped with a phased array probe. Experimental outcomes confirm that the proposed method can represent an alternative tool for the local measurement of both FAV in non-compliant vessels and PWV in compliant vessels filled with low echogenic fluids.

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“…The video tracking algorithm uncertainty has been evaluated by the means of a Monte Carlo Simulation (MCS) with 10 4 iterations [23]. At each MCS iteration, the number of markers inserted in the ROI has been made to vary randomly, thus obtaining a variation of the Markers' Centroid (MC) x-and y-coordinates.…”

Section: B Video Processingmentioning

confidence: 99%

First results on the functional characterization of two rotary comb-drive actuated MEMS microgripper with different geometry

Bocchetta¹,

Fiori²,

Scorza³

et al. 2022

Proceedings of the 25th IMEKO TC4 International Symposium and 23rd International Workshop on ADC and DAC Modelling and Testing

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Microgrippers (MGs) are Micro Electro-Mechanical System (MEMS) devices able to manipulate cells and micrometric objects. In order to carry out their functional characterization, a comparison between two electrostatic rotary combdrives actuated prototypes with different geometries through an image analysis-based method is proposed. This study aims at evaluating and comparing the MGs displacement as a function of the supply voltage. The two investigated geometries are equipped with a single rotary comb-drive and a double rotary comb-drive actuation. MGs data have been collected through a trinocular optical microscope with a digital camera and processed by means of an algorithm implemented ad hoc in MATLAB. Based on the promising results obtained, further studies are going to be carried out by including other geometries and improving the experimental setup and implemented method.

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A novel method for the gain conversion factor estimation in quality assessment of ultrasound diagnostic systems

Cited by 5 publications

References 14 publications

A Comparative Study on Depth of Penetration Measurements in Diagnostic Ultrasounds Through the Adaptive SNR Threshold Method

A Comparative Study on Depth of Penetration Measurements in Diagnostic Ultrasounds Through the Adaptive SNR Threshold Method

A Novel Equivalent Time Sampling-Based Method for Pulse Transit Time Estimation with Applications into the Cardiovascular Disease Diagnosis

First results on the functional characterization of two rotary comb-drive actuated MEMS microgripper with different geometry

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