Synthesis of Mammographic Images Based on the Fractional Brownian Motion
Ines Slim Sahli,
Hanen Bettaieb,
Asma Ben Abdallah,
Imen Bhouri,
Mohamed Hedi Bedoui
Issue:
Volume 6, Issue 1, March 2018
Pages:
1-8
Received:
25 January 2018
Accepted:
5 February 2018
Published:
27 February 2018
Abstract: This paper presents a new approach for synthesizing breast tissue images based on a random fractal process, the fractional Brownian motion (fBm). This work deals with modeling Regions of Interest (ROIs) of mammographic images. Diverse synthetic ROIs were generated: healthy ones and others with microcalcifications according to fatty and dense tissue. Microcalcifications were injected in several dispositions in order to model benign and malignant cases. The aim of this study resides in two points: (1) the generation of synthetic images of mammograms for researchers and radiologists in order to test their tools and orient the choice of their parameters to enhance the diagnostic accuracy; and (2) to compare two microcalcification segmentation approaches: ‘Sq-Sq’ approach based on multifractal analysis and the ‘MM’ approach based on Mathematical Morphology. In fact, the results proved that the ‘Sq-Sq’ method can detect microcalcifications with different arrangements for any type of tissue and were evaluated using a qualitative test by an expert and a quantitative one based on the Area Overlap Measure (AOM) and the Dice coefficient. The ‘Sq-Sq’ approach yield a mean of 0.8±0.06 for AOM and 0.8446 for Dice coefficient for all segmented images.
Abstract: This paper presents a new approach for synthesizing breast tissue images based on a random fractal process, the fractional Brownian motion (fBm). This work deals with modeling Regions of Interest (ROIs) of mammographic images. Diverse synthetic ROIs were generated: healthy ones and others with microcalcifications according to fatty and dense tissue...
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Clinical Value of Color Doppler Ultrasound in Diagnosis of Children Intussusception
Issue:
Volume 6, Issue 1, March 2018
Pages:
9-11
Received:
6 February 2018
Accepted:
25 February 2018
Published:
20 March 2018
Abstract: To analyze and evaluate the characteristics and effects of ultrasonography in the diagnosis of intussusception in children, the clinical data of 65 children with intussusception diagnosed by ultrasound were retrospectively analyzed. As a result, this group of children with intussusception confirmed by X-ray air enema reduction or surgery were diagnosed with no false-positive cases by color Doppler ultrasound. The characteristics of intussusception in children were as follows: the cross section of condom was changed concentrically, showing a "target ring" sign, a ring-shaped strong echo was found in the center of the target ring, or gas-liquid mixed echo. The outer circumference of the target ring alternately surrounds the multiple layers of strong and weak echoes. The thickness of the target ring is closely related to the number of layers of the intestine and the edema of the intestinal wall. The longitudinal section of the nested pile shows sleeve-like changes, showing a "sleeve" sign, the length in the range of 3.6 to 6.2cm. Finally, with reference to the characteristic changes of ultrasonic images in pediatric intussusception, it is concluded that the diagnosis of intussusception in children is reliable and accurate, and it is worthy of wide clinical application.
Abstract: To analyze and evaluate the characteristics and effects of ultrasonography in the diagnosis of intussusception in children, the clinical data of 65 children with intussusception diagnosed by ultrasound were retrospectively analyzed. As a result, this group of children with intussusception confirmed by X-ray air enema reduction or surgery were diagn...
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