Sensors, Vol. 19, Pages 4050: Enhancement of Multimodal Microwave-Ultrasound Breast Imaging Using a Deep-Learning Technique

We present a deep learning method used in conjunction with dual-modal microwave-ultrasound imaging to produce tomographic reconstructions of the complex-valued permittivity of numerical breast phantoms. We also assess tumor segmentation performance using the reconstructed permittivity as a feature. The contrast source inversion (CSI) technique is used to create the complex-permittivity images of the breast with ultrasound-derived tissue regions utilized as prior information. However, imaging artifacts make the detection of tumors difficult. To overcome this issue we train a convolutional neural network (CNN) that takes in, as input, the dual-modal CSI reconstruction and attempts to produce the true image of the complex tissue permittivity. The neural network consists of successive convolutional and downsampling layers, followed by successive deconvolutional and upsampling layers based on the U-Net architecture. To train the neural network, the input-output pairs consist of CSI’s dual-modal reconstructions, along with the true numerical phantom images from which the microwave scattered field was synthetically generated. The reconstructed permittivity images produced by the CNN show that the network is not only able to remove the artifacts that are typical of CSI reconstructions, but can also improve the detectability of tumors. The performance of the CNN is assessed using a four-fold cross-validation on our dataset that shows improvement over CSI both in terms of rec...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research

Related Links:

CONCLUSIONS: This survey provided a comprehensive update of the present cataract surgery practices in the Republic of Korea. The results emphasized the increasing use of premium intraocular lenses, optical biometry, and topical anesthesia. PMID: 31612656 [PubMed - in process]
Source: Korean Journal of Ophthalmology : KJO - Category: Opthalmology Tags: Korean J Ophthalmol Source Type: research
ConclusionThe occurrence of carotid plaques in asymptomatic individuals is underestimated by ultrasound compared to plaque assessment by CTA. Carotid plaque composition by CTA is different in individuals with and without carotid plaques by ultrasound.Key Points•The occurrence of carotid plaques by ultrasound was underestimated in 46% of participants who had plaques by carotid CTA.•Participants with carotid plaques by ultrasound had higher volumes of all plaque subtypes and a higher calcified plaque component as determined by carotid CTA compared to participants without carotid plaques by ultrasound.•A high c...
Source: European Radiology - Category: Radiology Source Type: research
ConclusionsThis work has demonstrated a significant correlation between the degree of lesion enhancement in CESM and malignancy. Quantitative analysis of enhancement levels in CESM can distinguish between invasive cancers and benign or in situ lesions.Key Points• There is a possibility of quantitative assessment of contrast enhancement in CESM.• Correlation between quantitative assessment of contrast enhancement in CESM and histopathology was observed.
Source: European Radiology - Category: Radiology Source Type: research
Publication date: September 2019Source: Chinese Medical Sciences Journal, Volume 34, Issue 3Author(s): Yingya Li, Liyan Duan, Fengli Chi, Kunming LiAbstractHere we report a case of heterotopic cornual pregnancy after in vitro fertilization who was diagnosed at 6 weeks after frozen embryos transfer. The heterotopic pregnancy was successfully terminated by transvaginal ultrasound-guided selective fetal reduction. At 38+1 weeks, she underwent a cesarean section and delivered a healthy 3300 g male infant with Apgar score of 10-10' evaluated at 1 min and 5 min.
Source: Chinese Medical Sciences Journal - Category: General Medicine Source Type: research
Publication date: Available online 15 October 2019Source: Annals of Medicine and SurgeryAuthor(s): Sardar Hassan Arif, Ayad Ahmad MohammedAbstractAbdomen cocoon is a rare disease in which a thick peritoneal membrane wraps the intestine causing the bowel loops to adhere to each other. It may be either primary(idiopathic) or secondary to other causes like previous abdominal surgery. Most patients present with abdominal pain and intestinal obstruction. The condition is usually diagnosed intraoperatively.Case 1A 30-year-old male patient presented with abdominal pain and bilious vomiting. The patient had similar previous attack...
Source: Annals of Medicine and Surgery - Category: General Medicine Source Type: research
Publication date: Available online 15 October 2019Source: Journal of Food Composition and AnalysisAuthor(s): Roberto RodriguezAbstractAn analytical method for extraction and quantitative determination of the main phenolic compounds (hydroxycinnamic acids and derivatives, anthocyanins and flavonols) in dry beans (Phaseolus vulgaris) is described. The best extraction conditions were: 100% sonication amplitude, 10.3 min extraction, 46% ethanol, 1.5 g dry bean flour and 30 mL of solvent. The developed method was validated in terms of accuracy and precision. Good linearity was obtained, with correlation coe...
Source: Journal of Food Composition and Analysis - Category: Food Science Source Type: research
Publication date: December 2019Source: Food Research International, Volume 126Author(s): Yanan Sun, Min Zhang, Bhesh Bhandari, Chao-hui YangAbstractThe synergistic impact of ultrasound and Nano-water retaining agent on the cryoprotective effect on crayfish during frozen storage was investigated. The samples soaked in water-retaining agent (WRA), ultrasonic 60 W treatment combined with water-retaining agent (WRA-US60W) and ultrasonic 80 W treatment combined with water-retaining agent (WRA-US80W) were frozen storage at −18 °C. The indices of frozen storage in 0, 7, 14, 21, 28, 35 and 42 days were measured. ...
Source: Food Research International - Category: Food Science Source Type: research
We report on a 13-year-old boy who presented with right iliac fossa pain associated with anorexia, tenderness, guarding and rebound tenderness. Abdominal ultrasound showed findings of acute appendicitis. However, laparoscopy revealed a wooden toothpick perforating MD and a hyperemic appendix. The FB was removed and laparoscopic diverticulectomy and appendectomy performed. Perforation of MD by a FB is a diagnostic challenge and it should be included in the differential diagnosis of acute abdomen in children.
Source: Journal of Pediatric Surgery Case Reports - Category: Surgery Source Type: research
ConclusionsTreatment guidelines aiming for complete ablation enhanced the effectiveness of MR-HIFU therapy. However, controlled trials should define the role of MR-HIFU in the management of uterine fibroids.
Source: European Journal of Radiology - Category: Radiology Source Type: research
Background The purpose of this study was to assess the objective and subjective outcomes of lower face volumetric (contour) asymmetry correction with isolated fat grafting in skeletally immature patients. Methods A prospective analysis was conducted of skeletally immature patients (n = 73) with craniofacial microsomia and Parry-Romberg syndrome who underwent isolated fat grafting (with no previous or concomitant bone surgery) using anatomical surgical principles (facial subunits and fat compartments) for the reconstruction of lower face volumetric asymmetry. Objective ultrasound and photogrammetric lower face symmetry...
Source: Annals of Plastic Surgery - Category: Cosmetic Surgery Tags: Head and Neck Surgery Source Type: research
More News: Biotechnology | Learning | Ultrasound | Universities & Medical Training