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3D scan AND breast

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https://www.readbyqxmd.com/read/29753181/weighted-regularized-statistical-shape-space-projection-for-breast-3d-model-reconstruction
#1
Guillermo Ruiz, Eduard Ramon, Jaime García, Federico M Sukno, Miguel A González Ballester
The use of 3D imaging has increased as a practical and useful tool for plastic and aesthetic surgery planning. Specifically, the possibility of representing the patient breast anatomy in a 3D shape and simulate aesthetic or plastic procedures is a great tool for communication between surgeon and patient during surgery planning. For the purpose of obtaining the specific 3D model of the breast of a patient, model-based reconstruction methods can be used. In particular, 3D morphable models (3DMM) are a robust and widely used method to perform 3D reconstruction...
May 2, 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29740104/setup-errors-and-effectiveness-of-optical-laser-3d-surface-imaging-system-sentinel-in-postoperative-radiotherapy-of-breast-cancer
#2
Xiaobo Wei, Mengjiao Liu, Yun Ding, Qilin Li, Changhai Cheng, Xian Zong, Wenming Yin, Jie Chen, Wendong Gu
Breast-conserving surgery (BCS) plus postoperative radiotherapy has become the standard treatment for early-stage breast cancer. The aim of this study was to compare the setup accuracy of optical surface imaging by the Sentinel system with cone-beam computerized tomography (CBCT) imaging currently used in our clinic for patients received BCS. Two optical surface scans were acquired before and immediately after couch movement correction. The correlation between the setup errors as determined by the initial optical surface scan and CBCT was analyzed...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29732341/comparison-and-evaluation-of-different-treatment-plans-with-ifrt-field-and-6-and-18-mv-energies-in-hodgkin-s-lymphoma-involvement-neck-and-mediastinum
#3
M B Tavakoli, M Maleki, A Akhavan, T Hadisinia, I Abedi, A Amouheidari
Background: Radiotherapy with large mantle field is an effective technique in increasing the risk of secondary cancers among HL (Hodgkin Lymphoma) patients; therefore, it is essential to choose an effective treatment field including the least medical conditions in radiotherapy. Objective: The present study aimed to plan separate fields for neck and mediastinum using various energies, to compare dose distribution with MLC and to block field formation. Materials and Methods: In this study, 3D conformal treatments, Siemens Oncor accelerator equipped with multi-leaf collimator (MLC) were performed to create anterior-posterior fields...
March 2018: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/29697670/-comparison-of-digital-and-visual-methods-for-ki-67-assessment-in-invasive-breast-carcinomas
#4
V A Kushnarev, E S Artemyeva, A G Kudaybergenova
AIM: to compare two methods for quantitative assessment of the proliferative activity index (PAI): a visual estimation method by several investigators and digital image analysis (DIA). The use of the Ki-67 index in the daily clinical practice of a Morbid Anatomy Department is associated with the problem of reproducibility of quantitative assessment of the Ki-67 PAI. Due to the development of digital imaging techniques in morphology, new methods for PAI evaluation using the DIA are proposed...
2018: Arkhiv Patologii
https://www.readbyqxmd.com/read/29697054/incorporating-drug-delivery-into-an-imaging-driven-mechanics-coupled-reaction-diffusion-model-for-predicting-the-response-of-breast-cancer-to-neoadjuvant-chemotherapy-theory-and-preliminary-clinical-results
#5
Angela M Jarrett, David A Hormuth Ii, Stephanie L Barnes, Xinzeng Feng, Wei Huang, Thomas E Yankeelov
Clinical methods for assessing tumor response to therapy are largely rudimentary, monitoring only temporal changes in tumor size. Our goal is to predict the response of breast tumors to therapy using a mathematical model that utilizes magnetic resonance imaging (MRI) data obtained non-invasively from individual patients. We extended a previously established, mechanically coupled, reaction-diffusion model for predicting tumor response initialized with patient-specific diffusion weighted MRI (DW-MRI) data by including the effects of chemotherapy drug delivery, which is estimated using dynamic contrast-enhanced (DCE-) MRI data...
April 26, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29693610/the-application-of-an-ultrasound-tomography-algorithm-in-a-novel-ring-3d-ultrasound-imaging-system
#6
Chang Liu, Chenyang Xue, Binzhen Zhang, Guojun Zhang, Changde He
Currently, breast cancer is one of the most common cancers in women all over the world. A novel 3D breast ultrasound imaging ring system using the linear array transducer is proposed to decrease costs, reduce processing difficulties, and improve patient comfort as compared to modern day breast screening systems. The 1 × 128 Piezoelectric Micromachined Ultrasonic Transducer (PMUT) linear array is placed 90 degrees cross-vertically. The transducer surrounds the mammary gland, which allows for non-contact detection...
April 25, 2018: Sensors
https://www.readbyqxmd.com/read/29689765/characterization-of-ct-hounsfield-units-for-3d-acquisition-trajectories-on-a-dedicated-breast-ct-system
#7
Jainil P Shah, Steve D Mann, Randolph L McKinley, Martin P Tornai
Hounsfield Units (HU) are used clinically in differentiating tissue types in a reconstructed CT image, and therefore the HU accuracy of a system is important, especially when using multiple sources, novel detector and non-traditional trajectories. Dedicated clinical breast CT (BCT) systems therefore should be similarly evaluated. In this study, uniform cylindrical phantoms filled with various uniform density fluids were used to characterize differences in HU values between simple circular and complex 3D (saddle) orbits...
April 18, 2018: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/29663370/deformable-torso-phantoms-of-chinese-adults-for-personalized-anatomy-modelling
#8
Hongkai Wang, Xiaobang Sun, Tongning Wu, Congsheng Li, Zhonghua Chen, Meiying Liao, Mengci Li, Wen Yan, Hui Huang, Jia Yang, Ziyu Tan, Libo Hui, Yue Liu, Hang Pan, Yue Qu, Zhaofeng Chen, Liwen Tan, Lijuan Yu, Hongcheng Shi, Li Huo, Yanjun Zhang, Xin Tang, Shaoxiang Zhang, Changjian Liu
In recent years, there has been increasing demand for personalized anatomy modelling for medical and industrial applications, such as ergonomics device development, clinical radiological exposure simulation, biomechanics analysis, and 3D animation character design. In this study, we constructed deformable torso phantoms that can be deformed to match the personal anatomy of Chinese male and female adults. The phantoms were created based on a training set of 79 trunk computed tomography (CT) images (41 males and 38 females) from normal Chinese subjects...
April 16, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29438465/does-stromal-vascular-fraction-ensure-a-higher-survival-in-autologous-fat-grafting-for-breast-augmentation-a-volumetric-study-using-3-dimensional-laser-scanning
#9
Cheng-Hung Chiu
Background: Cell-assisted lipotransfer (CAL) has been considered a promising technique for promoting adipogenesis and angiogenesis in fat grafts. Objectives: The author sought to objectively analyze the change of breast volume in patients who underwent stromal vascular fraction (SVF)-enriched fat grafting for breast augmentation and compared the clinical results with those who underwent conventional fat grafting without SVF by using 3D laser scanning. Methods: From April 2015 to March 2016, 105 patients who underwent traditional fat grafting without SVF enrichment for breast augmentation were assigned to group A and served as the control...
February 9, 2018: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29399850/three-dimensional-shear-wave-elastography-of-skeletal-muscle-preliminary-study
#10
Li Yin, Ruigang Lu, Wen Cao, Lingling Zhang, Wenjing Li, Hong Sun, Ruijun Guo
OBJECTIVES: Two-dimensional (2D) shear wave elastography (SWE) can measure the elasticity of skeletal muscle, tendons, and ligaments. Three-dimensional (3D) SWE has been used to detect breast cancer but has not been applied to the musculoskeletal system. This study aimed to investigate whether 3D SWE could be used in skeletal muscles in vivo. METHODS: The study enrolled 20 healthy volunteers at Beijing Chaoyang Hospital from August to October 2016. Two-dimensional and 3D SWE scans were used to measure the Young modulus of the flexor carpi radialis in the relaxed state...
February 5, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29398305/investigation-of-electron-boost-radiotherapy-in-patients-with-breast-cancer-is-a-direct-electron-field-optimal
#11
M Aghili, M Barzegartahamtan, A Alikhassi, R Mohammadpour
PURPOSE: Historically, electron boost dose mainly was delivered by a direct field in adjuvant radiotherapy of breast cancer. In this prospective study, we investigated direct electron field, in terms of optimal coverage of tumour bed volume following localization using ultrasound and surgical clips. MATERIAL AND METHODS: First, for all 24 patients, a breast sonographer drew perimeter of tumour bed on the breast skin. Then an electron boost field was outlined on the demarcated territory, and a lead wire marker compatible with CT scan was placed on the field borders by a 2cm margin...
February 2018: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/29376838/model-observer-for-assessing-digital-breast-tomosynthesis-for-multi-lesion-detection-in-the-presence-of-anatomical-noise
#12
Gezheng Wen, Mia K Markey, Tamara Miner Haygood, Subok Park
Model observers are widely used in task-based assessments of medical image quality. The presence of multiple abnormalities in a single set of images, such as in multifocal multicentric breast cancer (MFMC), has an immense clinical impact on treatment planning and survival outcomes. Detecting multiple breast tumors is challenging as MFMC is relatively uncommon, and human observers do not know the number or locations of tumors a priori. Digital breast tomosynthesis (DBT), in which an x-ray beam sweeps over a limited angular range across the breast, has the potential to improve the detection of multiple tumors...
February 16, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29276070/a-piecewise-mass-spring-damper-model-of-the-human-breast
#13
Yiqing Cai, Lihua Chen, Winnie Yu, Jie Zhou, Frances Wan, Minyoung Suh, Daniel Hung-Kay Chow
Previous models to predict breast movement whilst performing physical activities have, erroneously, assumed uniform elasticity within the breast. Consequently, the predicted displacements have not yet been satisfactorily validated. In this study, real time motion capture of the natural vibrations of a breast that followed, after raising and allowing it to fall freely, revealed an obvious difference in the vibration characteristics above and below the static equilibrium position. This implied that the elastic and viscous damping properties of a breast could vary under extension or compression...
January 23, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29197746/proton-therapy-for-locally-advanced-breast-cancer-a-systematic-review-of-the-literature
#14
REVIEW
Emmanuel Kammerer, Jennifer Le Guevelou, Abdulhamid Chaikh, Serge Danhier, Julien Geffrelot, Christelle Levy, Eric Saloux, Jean-Louis Habrand, Juliette Thariat
BACKGROUND: Radiation therapy plays a major role in the management of adjuvant breast cancer with nodal involvement, with an iatrogenic increase of cardio-vascular risk. Photon therapy, even with intensity modulation, has the downsides of high mean heart dose and heterogeneous target coverage, particularly in the case of internal mammary irradiation. This systematic review of the literature aims to evaluate proton therapy in locally advanced breast cancer. MATERIAL AND METHODS: PubMed was searched for original full-text articles with the following search terms: «Proton Therapy» and «Breast Cancer»...
February 2018: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/29182056/lesion-segmentation-in-automated-3d-breast-ultrasound-volumetric-analysis
#15
Richa Agarwal, Oliver Diaz, Xavier Lladó, Albert Gubern-Mérida, Joan C Vilanova, Robert Martí
Mammography is the gold standard screening technique in breast cancer, but it has some limitations for women with dense breasts. In such cases, sonography is usually recommended as an additional imaging technique. A traditional sonogram produces a two-dimensional (2D) visualization of the breast and is highly operator dependent. Automated breast ultrasound (ABUS) has also been proposed to produce a full 3D scan of the breast automatically with reduced operator dependency, facilitating double reading and comparison with past exams...
March 2018: Ultrasonic Imaging
https://www.readbyqxmd.com/read/29168877/full-angle-tomographic-phase-microscopy-of-flowing-quasi-spherical-cells
#16
Massimiliano M Villone, Pasquale Memmolo, Francesco Merola, Martina Mugnano, Lisa Miccio, Pier Luca Maffettone, Pietro Ferraro
We report a reliable full-angle tomographic phase microscopy (FA-TPM) method for flowing quasi-spherical cells along microfluidic channels. This method lies in a completely passive optical system, i.e. mechanical scanning or multi-direction probing of the sample is avoided. It exploits the engineered rolling of cells while they are flowing along a microfluidic channel. Here we demonstrate significant progress with respect to the state of the art of in-flow TPM by showing a general extension to cells having almost spherical shapes while they are flowing in suspension...
December 19, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/29130138/automated-3d-method-for-the-construction-of-flexible-and-reconfigurable-numerical-breast-models-from-mri-scans
#17
Muhammad Omer, Elise C Fear
Anatomically realistic numerical breast models are essential tools for microwave breast imaging, supporting feasibility analysis, performance verification, and design improvements. Patient-specific models also assist in interpreting the results of the patient studies conducted on microwave imaging prototype systems. The proposed method employs automated and robust 3D processing techniques to construct flexible and reconfigurable breast models. These techniques include noise and artifact suppression with a principal component analysis (PCA) approach, and oversampling of the magnetic resonance imaging (MRI) data to enhance the intensity continuity...
November 13, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29097927/comparison-of-diagnostic-performance-of-three-dimensional-positron-emission-mammography-versus-whole-body-positron-emission-tomography-in-breast-cancer
#18
Dong Dai, Xiuyu Song, Man Wang, Lin Li, Wenchao Ma, Wengui Xu, Yunchuan Ma, Juntian Liu, Jin Zhang, Peifang Liu, Xiaoyue Gu, Yusheng Su
Objective: To compare the diagnostic performance of three-dimensional (3D) positron emission mammography (PEM) versus whole body positron emission tomography (WBPET) for breast cancer. Methods: A total of 410 women with normal breast or benign or highly suspicious malignant tumors were randomized at 1 : 1 ratio to undergo 3D-PEM followed by WBPET or WBPET followed by 3D-PEM. Lumpectomy or mastectomy was performed on eligible participants after the scanning. Results: The sensitivity and specificity of 3D-PEM were 92...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29048330/calibration-and-analysis-of-a-multimodal-micro-ct-and-structured-light-imaging-system-for-the-evaluation-of-excised-breast-tissue
#19
David M McClatchy, Elizabeth J Rizzo, Jeff Meganck, Josh Kempner, Jared Vicory, Wendy A Wells, Keith D Paulsen, Brian W Pogue
A multimodal micro-computed tomography (CT) and multi-spectral structured light imaging (SLI) system is introduced and systematically analyzed to test its feasibility to aid in margin delineation during breast conserving surgery (BCS). Phantom analysis of the micro-CT yielded a signal-to-noise ratio of 34, a contrast of 1.64, and a minimum detectable resolution of 240 μm for a 1.2 min scan. The SLI system, spanning wavelengths 490 nm to 800 nm and spatial frequencies up to 1.37 [Formula: see text], was evaluated with aqueous tissue simulating phantoms having variations in particle size distribution, scatter density, and blood volume fraction...
November 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29039755/comparing-riegl-ricopter-uav-lidar-derived-canopy-height-and-dbh-with-terrestrial-lidar
#20
Benjamin Brede, Alvaro Lau, Harm M Bartholomeus, Lammert Kooistra
In recent years, LIght Detection And Ranging (LiDAR) and especially Terrestrial Laser Scanning (TLS) systems have shown the potential to revolutionise forest structural characterisation by providing unprecedented 3D data. However, manned Airborne Laser Scanning (ALS) requires costly campaigns and produces relatively low point density, while TLS is labour intense and time demanding. Unmanned Aerial Vehicle (UAV)-borne laser scanning can be the way in between. In this study, we present first results and experiences with the RIEGL RiCOPTER with VUX ® -1UAV ALS system and compare it with the well tested RIEGL VZ-400 TLS system...
October 17, 2017: Sensors
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