Reintervention risk and quality of life outcomes after uterine-sparing interventions for fibroids: a systematic review and meta-analysis

To evaluate the outcome of hysteroscopic myomectomy in patients with infertility and recurrent abortions. This was a retrospective clinical analysis of 186 patients who underwent hysteroscopic myomectomy by monopolar electrode loop. A second-look diagnostic hysteroscopy was performed in all cases within 2 months. The mean follow-up period was 36.5 months. The mean age of the patients was 28.4 years. The presenting clinical complaint was primary infertility in 31% (62/200) patients, secondary infertility in 10% (20/200) patients, recurrent abortions in 50.5% (101/200) and preterm deliveries in 8.5% (17/200) patients. Final reproductive outcome was assessed for 186 patients, after excluding patients with other confounding factors, interfering in pregnancy outcome. There was a significant difference in reduction of number of miscarriages and increase in term deliveries while the number of preterm deliveries remained almost the same. Fifty-eight out of 82 infertile patients (70.7%) conceived after hysteroscopic myomectomy. The take home baby rate was increased from 16.2 to 74%. There was an increased incidence (35.6%) of cesarean section recorded in mode of delivery. Hysteroscopic myomectomy is a safe and effective method for improving the obstetric outcome in women with infertility and recurrent abortions and associated submucous fibroids.

Reproductive outcome following hysteroscopic myomectomy in patients with infertility and recurrent abortions

Transrectal ultrasound-guided hysteroscopic myomectomy of submucosal myomas with a varying degree of myometrial penetration.

Resume Objectifs Evaluer les resultats postoperatoires apres resection hysteroscopique de myomes sous-muqueux symptomatiques a court et long terme. Patientes et methodes Etude retrospective unicentrique (CHU Estaing, Clermont-Ferrand, France) incluant les patientes operees par hysteroscopie en 2004 pour un ou plusieurs myomes sous-muqueux symptomatiques. Une enquete telephonique etudiant la recidive des symptomes et la satisfaction des patientes a ete realisee a quatre et six ans postoperatoires. Resultats Soixante-douze patientes (âge moyen : 45,6 ans [18–70]) ont ete operees. Lors de la premiere evaluation, le taux de recurrences etait de 22 % (n = 15) dont 87,5 % dans la premiere annee. Dix-neuf pour cent des patientes ont necessite un geste therapeutique ulterieur. Les facteurs significatifs de risque d’echec du traitement incluaient l’âge plus jeune, la taille et le nombre des myomes, l’extension intramurale et le caractere incomplet de la resection. En 2010, le taux total d’echecs etait de 30,7 % (n = 18). Cinquante pour cent des patientes presentant une resection incomplete ne necessiteront aucun geste complementaire. Conclusion Dans 70 % des cas, l’efficacite de la resection hysteroscopique se maintient a long terme. La re-intervention ne doit pas etre systematique apres resection incomplete. L’information faite aux patientes, surtout celles presentant des facteurs de risque de recidive, se doit d’etre complete.

Myomectomie hystéroscopique : récidive et enquête de satisfaction à court et long terme

Motion estimation is one of the major problems in developing a real-time software-based video codec since it has high search complexity. In the motion estimation process, the motion field of the current block can generally be tracked from the motion fields of the neighboring blocks in the spatial and temporal directions. In this paper, two efficient fast motion estimation algorithms with a two-stage predictive search based on joint spatio-temporal correlations are proposed to reduce the search complexity. In the first stage, a rough search from the given motion vectors associated with six spatially and temporally correlated blocks attempts to find a starting point of the adequate search range that is closer to the global optimum. In the second stage, block-based gradient descent search (Liu & Feig, 1996) and predictive partial search (proposed) algorithms are used for fine search to elaborately search the adequate range from the starting point for the best motion vector. Simulation results demonstrate that our algorithms effectively reduce the average number of checked points to only 1.55% and 0.78% as compared to the full search method and yield a great performance improvement in terms of computational complexity, PSNR and bit rates as compared to full search and some well-known fast search methods.

Motion estimation using two-stage predictive search algorithms based on joint spatio-temporal correlation information

Factors associated with operative hysteroscopy outcome in patients with uterine adhesions or submucosal myomas

The protection and authentication problems for three dimensional (3D) models have become more and more important. The capability of accurately verifying, locating, and recovering any tampered vertex is one of the most important issues. Published fragile watermarking 3D model schemes have a main drawback, the synchronization problem. To increase the capacity of verification and overcome this drawback, a high verification capacity reversible fragile watermarking scheme for 3D models in the spatial domain is proposed in this paper. Initially, a reversible quantization index modulation embedding scheme employs the principal component analysis (PCA) and modulates the distance from the vertex coordinate to the gravity center of the cover model. And, the spread spectrum technique is adopted to improve the robustness while obeying the sensitive fragility and low distortion requirements for watermarking 3D models. The proposed method can achieve that 100% vertices of the cover model can be watermarked, extracted and verified, while the other 3D fragile watermarking schemes can not. In the meanwhile, the synchronization problem is overcome. Moreover, the proposed method is immune to the causality and convergence problems. Finally, the proposed scheme is robust against vertex reordering and similarity transformation attacks.

/pdf/a-high-verification-capacity-reversible-fragile-watermarking-3xpug48fgw.pdf

A high verification capacity reversible fragile watermarking scheme for 3d models

In this paper, an error-detecting code based public fragile watermarking scheme that enables the authentication of 3D models for detecting unauthorized alterations is presented in spherical coordinate system. Initially, the three dimensional (3D) model is translated from the Cartesian coordinate system to the spherical coordinate system. Then normalization technique is adopted to produce the normalized 3D cover model. An adaptive watermark is generated from each cover model by using the hamming code technique, and a simple least significant bit (LSB) substitution technique is employed for watermark data embedding. The verification data is absent in this paper because the verification task can be achieved by using the hamming code technique. The experiment results show that 100% vertices of the three dimensional (3D) model can be watermarked and verified. Moreover, the verification task can be achieved without the verification data in the proposed method.

http://ieeexplore.ieee.org/iel7/7542780/7545109/07545192.pdf

An Error-Detecting Code Based Fragile Watermarking Scheme in Spherical Coordinate System

Contrast enhancement plays a fundamental role in image processing. Many histogram-based techniques are widely used for contrast enhancement of given images, due to their simple function and effectiveness. However, the conventional histogram equalization (HE) methods result in excessive contrast enhancement, which causes natural looking and satisfactory results for a variety of low contrast images. To solve such problems, a novel multi-histogram equalization technique is proposed to enhance the contrast of the palm bone X-ray radiographs in this paper. For images, the mean-variance analysis method is employed to partition the histogram of the original grey scale image into multiple sub-histograms. These histograms are independently equalized. By using this mean-variance partition method, a proposed multi-histogram equalization technique is employed to achieve the contrast enhancement of the palm bone X-ray radiographs. Experimental results show that the multi-histogram equalization technique achieves a lower average absolute mean brightness error (AMBE) value. The multi-histogram equalization technique simultaneously preserved the mean brightness and enhanced the local contrast of the original image.

https://www.mdpi.com/1999-4893/7/3/444/pdf

A Novel Contrast Enhancement Technique on Palm Bone Images

A real-time software-based H.261 video codec is addressed and implemented. The experimental results show that our system can compress video in CIF format over 30 fps and in QCIF at 105 fps.

Yung-Tsang Chang

Papers

Factors associated with operative hysteroscopy outcome in patients with uterine adhesions or submucosal myomas

A high verification capacity reversible fragile watermarking scheme for 3d models

An Error-Detecting Code Based Fragile Watermarking Scheme in Spherical Coordinate System

A Novel Contrast Enhancement Technique on Palm Bone Images

Design and implementation of real-time software-based H.261 video codec