1,721,423 research outputs found
Optimal catheter placement during sonohysterography: a randomized controlled trial comparing cervical to uterine placement.
No full textThere is not sufficient evidence to suggest routine intracervical catheter placement for sonohysterography or hysterosalpingography. Each year millions of women undergo these procedures. Any change in standard technique should
be evidence based
Adaptive radar detection and localization of a point-like target in homogeneous environment
No full textAdaptive Detection and Interference Rejection of Multiple Point-Like Radar Targets
No full textWe present an adaptive algorithm aimed at detecting multiple point-like radar targets embedded in correlated Gaussian noise. The proposed detector modifies and improves the adaptive beamformer orthogonal rejection test (ABORT) idea to address detection of multiple targets. More precisely, it relies on the so-called two-step generalized likelihood ratio test (GLRT) design procedure implemented without assignment of a distinct set of secondary data. The newly proposed detector can guarantee the constant false alarm rate (CFAR) property and the performance assessment, conducted resorting to simulated data, has shown that it exhibits better rejection capabilities of mismatched signals than previously proposed detectors, at the price of an acceptable performance loss for matched signal
Adaptive Detection and Interference Rejection for Multiple Point-Like Radar Targets
No full textWe present an adaptive algorithm to
detect multiple point-like radar targets embedded in
correlated Gaussian noise. The proposed detector generalizes
the ABORT idea to the detection of multiple
targets [1]. More precisely, it relies to the so-called
two-step Generalized Likelihood Ratio Test (GLRT)
design procedure, which makes it possible to get rid of
distinct secondary data, and, remarkably, guarantees
the Constant False Alarm Rate (CFAR) property. A
preliminary performance assessment, conducted resorting
to simulated data, has shown that the newlyproposed
detector exhibits better rejection capabilities
of mismatch signals than detector [2], at the price of
a small performance loss
Balloon catheter vs. cervical vacuum cup for hysterosalpingography: a prospective, randomized, single-blinded study.
No full textHysterosalpingography can be a painless
or a mildly painful procedure in most patients if it is performed
using nontraumatic devices. However, in our
study about 20% of women complained of moderate and
about 1% of severe pain during the procedure. Recently, it
has been demonstrated that routine pretreatment with nonsteroidal
antiinflammatory drugs does not reduce pain score
in comparison with placebo. This finding confirms that
further studies are required to assess whether an accurate
preliminary evaluation of the patients might be useful to
identify the subgroup of women who need analgesic pretreatment
Slicks Detection on the Sea Surface Based Upon Polarimetric SAR Data
No full textThis letter proposes a generalized-likelihood ratio test-based edge detector to be fed by possibly polarimetric synthetic aperture radar (SAR) data. It can be used to detect dark spots on the sea surface and, hence, as the first stage of a system for identification and monitoring of oil spills. The proposed constant false alarm rate (CFAR) detector does not require secondary data (namely pixels from a slick-free area); remarkably, a preliminary performance assessment, carried out by resorting to real SAR recordings, shows that it guarantees detection capabilities comparable to those of previously proposed polarimetric CFAR detectors (which though make use of secondary data). The preliminary performance assessment also seems to indicate that processing polarimetric data does not ensure improved detection capabilities
Non-trained Oil Slicks CFAR Detection based upon (possibly Polarimetric) SAR Data
No full textThis paper addresses CFAR detection of oil
slicks on the ocean surface by resorting to possibly polarimetric
SAR data. The proposed GLRT-based detectors do
not require secondary data (namely pixels from a slick-free
area); remarkably, the performance assessment, carried out
by resorting to real SAR recordings, shows that they guarantee
detection capabilities comparable to those of previouslyproposed
polarimetric CFAR detectors which though make
use of secondary data. The preliminary performance assessment
seems to indicate that processing polarimetric data
does not improve detectability of oil slicks
- …
