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3D surface scanning AND Breast

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https://www.readbyqxmd.com/read/29039755/comparing-riegl-ricopter-uav-lidar-derived-canopy-height-and-dbh-with-terrestrial-lidar
#1
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
https://www.readbyqxmd.com/read/28921580/integrating-prior-information-into-microwave-tomography-part-1-impact-of-detail-on-image-quality
#2
Douglas Kurrant, Anastasia Baran, Joe LoVetri, Elise Fear
PURPOSE: The authors investigate the impact that incremental increases in the level of detail of patient-specific prior information have on image quality and the convergence behavior of an inversion algorithm in the context of near-field microwave breast imaging. A methodology is presented that uses image quality measures to characterize the ability of the algorithm to reconstruct both internal structures and lesions embedded in fibroglandular tissue. The approach permits key aspects that impact the quality of reconstruction of these structures to be identified and quantified...
September 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28774804/an-innovative-mediator-free-immunosensor-for-detection-of-tumor-suppressor-protein-p53-in-unprocessed-human-plasma-and-cancer-cell-lysates
#3
Mohammad Hasanzadeh, Hosein Navayebagban, Ahad Mokhtarzadeh, Nasrin Shadjou, Soltanali Mahboob
An innovative mediator-free electrochemical immunosensor for quantitation of p53 tumor suppressor protein based on signal amplification strategy was fabricated. In this work, biotin conjugated p53-antibody (anti-p53) was immobilized onto a green and biocompatible nanocomposite containing poly L-cysteine (P-Cys) as conductive matrix and 3D gold nanoparticles (GNPs) as signal amplification element. Therefore, a novel nanocomposite film based on P-Cys and GNPs was exploited to develop a highly sensitive immunosensor for detection of p53 protein...
July 31, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28652810/an-effective-deep-inspiration-breath-hold-radiotherapy-technique-for-left-breast-cancer-impact-of-post-mastectomy-treatment-nodal-coverage-and-dose-schedule-on-organs-at-risk
#4
Lynsey Rice, Christy Goldsmith, Melanie Ml Green, Susan Cleator, Patricia M Price
BACKGROUND: We developed, applied, and prospectively evaluated a novel deep-inspiration breath-hold (DIBH) screening and delivery technique to optimize cardiac sparing in left-breast radiotherapy (RT) at our clinic. The impact of set-up and dose variables upon organs at risk (OAR) dose in DIBH RT was investigated. METHODS AND MATERIALS: All patients with left-breast cancer referred between 2011 and 2014 - of all disease stages, set-up variations, and dose prescriptions - were included...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/28472167/3d-forest-an-application-for-descriptions-of-three-dimensional-forest-structures-using-terrestrial-lidar
#5
Jan Trochta, Martin Krůček, Tomáš Vrška, Kamil Král
Terrestrial laser scanning is a powerful technology for capturing the three-dimensional structure of forests with a high level of detail and accuracy. Over the last decade, many algorithms have been developed to extract various tree parameters from terrestrial laser scanning data. Here we present 3D Forest, an open-source non-platform-specific software application with an easy-to-use graphical user interface with the compilation of algorithms focused on the forest environment and extraction of tree parameters...
2017: PloS One
https://www.readbyqxmd.com/read/28362737/depth-encoded-optical-coherence-elastography-for-simultaneous-volumetric-imaging-of-two-tissue-faces
#6
Qi Fang, Luke Frewer, Philip Wijesinghe, Wes M Allen, Lixin Chin, Juliana Hamzah, David D Sampson, Andrea Curatolo, Brendan F Kennedy
Depth-encoded optical coherence elastography (OCE) enables simultaneous acquisition of two three-dimensional (3D) elastograms from opposite sides of a sample. By the choice of suitable path-length differences in each of two interferometers, the detected carrier frequencies are separated, allowing depth-ranging from each interferometer to be performed simultaneously using a single spectrometer. We demonstrate depth-encoded OCE on a silicone phantom and a freshly excised sample of mouse liver. This technique minimizes the required spectral detection hardware and halves the total scan time...
April 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28000609/an-in-vitro-3d-model-using-collagen-coated-gelatin-nanofibers-for-studying-breast-cancer-metastasis
#7
G Janani, Mamatha M Pillai, R Selvakumar, Amitava Bhattacharyya, C Sabarinath
The study of breast cancer metastasis is limited due to poor knowledge of molecular progression of breast tumor and varied heterogeneity. For a better understanding of tumor metastasis, a reliable 3D in vitro model bridging the gap between 2D cultures and in vivo animal model studies is essential. Our study is focused on two key points: (i) designing a 3D microenvironment for studying metastasis and (ii) simulating the metastasis milieu by inducing epithelial to mesenchymal transition (EMT) and mesenchymal to epithelial transition (MET)...
February 7, 2017: Biofabrication
https://www.readbyqxmd.com/read/27986753/nipple-reconstruction-after-autologous-or-expander-breast-reconstruction-a-multimodal-and-3-dimensional-analysis
#8
Mathias Tremp, Pietro G di Summa, Dominique Schaakxs, Carlo M Oranges, Reto Wettstein, Daniel F Kalbermatten
BACKGROUND: Little is known about the influence of the underlying tissue as donor for nipple-areola complex (NAC) reconstruction. Also, there is a complete lack of knowledge about the fate of nipple volume. OBJECTIVES: The goal of this retrospective, single-institution study was to analyze a case series after nipple reconstruction using a multimodal evaluation including 3-dimensional (3D) laser scanner analyses. METHODS: Unilateral mastectomy patients after either expander-based or autologous breast reconstruction using the skate flap were included...
February 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/27860134/a-study-of-the-growth-patterns-of-breast-carcinoma-using-3d-reconstruction-a-pilot-study
#9
Andrea L Merrill, Julliette Buckley, Rong Tang, Elena Brachtel, Upahvan Rai, James Michaelson, Amy Ly, Michelle C Specht, Yukako Yagi, Barbara L Smith
Lumpectomy with microscopically clear margins is a safe and effective approach for surgical management of breast carcinoma. Margins are positive for tumor in 18-50% of lumpectomies, as it is not possible to accurately determine the shape or microscopic borders of a tumor preoperatively or intraoperatively. We examined the 3D microanatomy and growth patterns of common breast carcinoma subtypes to provide guidance for lumpectomy surgery. Prospective consent was obtained for the use of excess tissue from patients undergoing lumpectomy or mastectomy for breast carcinoma...
January 2017: Breast Journal
https://www.readbyqxmd.com/read/27785471/measuring-anterior-trunk-deformity-in-scoliosis-development-of-asymmetry-parameters-using-surface-topography-a-pilot-study
#10
Patrick Knott, Baron Lonner, Mark Smith, Erin Frommeyer, Yuan Ren
BACKGROUND: Clinicians who assess and treat patients for scoliosis typically use parameters that are all visible from the posterior view. Radiographs assess the internal spinal deformity, but do not directly evaluate body shape, either posterior or anterior. This is problematic, as the patient is most concerned about the way they appear in the mirror. An objective set of anterior measurements is needed to help quantify the anterior asymmetry that is present in scoliosis. METHODS: The design of this system of assessment was developed as a consensus of thinking from four points of view...
2016: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/27689050/three-dimensional-surface-imaging-is-an-effective-tool-for-measuring-breast-volume-a-validation-study
#11
Woo Yeon Lee, Min Jung Kim, Dae Hyun Lew, Seung Yong Song, Dong Won Lee
BACKGROUND: Accurate breast volume assessment is a prerequisite to preoperative planning, as well as intraoperative decision making in breast reconstruction surgery. The use of three-dimensional surface imaging (3D scanning) to assess breast volume has many advantages. However, before employing 3D scanning in the field, the tool's validity should be demonstrated. The purpose of this study was to confirm the validity of 3D-scanning technology for evaluating breast volume. METHODS: We reviewed the charts of 25 patients who underwent breast reconstruction surgery immediately after total mastectomy...
September 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27643463/computation-of-breast-ptosis-from-3d-surface-scans-of-the-female-torso
#12
Danni Li, Audrey Cheong, Gregory P Reece, Melissa A Crosby, Michelle C Fingeret, Fatima A Merchant
Stereophotography is now finding a niche in clinical breast surgery, and several methods for quantitatively measuring breast morphology from 3D surface images have been developed. Breast ptosis (sagging of the breast), which refers to the extent by which the nipple is lower than the inframammary fold (the contour along which the inferior part of the breast attaches to the chest wall), is an important morphological parameter that is frequently used for assessing the outcome of breast surgery. This study presents a novel algorithm that utilizes three-dimensional (3D) features such as surface curvature and orientation for the assessment of breast ptosis from 3D scans of the female torso...
November 1, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27047788/breast-volumetric-analysis-for-aesthetic-planning-in-breast-reconstruction-a-literature-review-of-techniques
#13
REVIEW
Michael P Chae, Warren Matthew Rozen, Robert T Spychal, David J Hunter-Smith
BACKGROUND: Accurate volumetric analysis is an essential component of preoperative planning in both reconstructive and aesthetic breast procedures towards achieving symmetrization and patient-satisfactory outcome. Numerous comparative studies and reviews of individual techniques have been reported. However, a unifying review of all techniques comparing their accuracy, reliability, and practicality has been lacking. METHODS: A review of the published English literature dating from 1950 to 2015 using databases, such as PubMed, Medline, Web of Science, and EMBASE, was undertaken...
April 2016: Gland Surgery
https://www.readbyqxmd.com/read/27026841/impact-of-chest-wall-motion-caused-by-respiration-in-adjuvant-radiotherapy-for-postoperative-breast-cancer-patients
#14
C Lowanichkiattikul, M Dhanachai, C Sitathanee, S Khachonkham, P Khaothong
To determine the chest wall movement of each patient during deep inspiratory breath hold (DIBH) and expiratory breath hold (EBH) in postoperative breast cancer patients. Postoperative breast cancer patients who underwent CT simulation for 3D radiotherapy treatment planning during December 2012 to November 2013 were included. Before scanning the radio-opaque wire was placed on the surface for breast and chest wall visualization on CT images, then the patient underwent three phases of CT scanning (free breathing, DIBH, and EBH, respectively)...
2016: SpringerPlus
https://www.readbyqxmd.com/read/26746882/characterization-of-breast-implant-surfaces-shapes-and-biomechanics-a-comparison-of-high-cohesive-anatomically-shaped-textured-silicone-breast-implants-from-three-different-manufacturers
#15
COMPARATIVE STUDY
Michael Atlan, Maxence Bigerelle, Véronique Larreta-garde, Mathilde Hindié, Per Hedén
UNLABELLED: Several companies offer anatomically shaped breast implants but differences among manufacturers are often misunderstood. The shell texture is a crucial parameter for anatomically shaped implants to prevent rotation and to decrease the risk of capsular contracture, even though concerns have recently been raised concerning the complications associated with textured breast implants. The aim of this study was to characterize differences in terms of texture, cell adhesion, shape, and stiffness between some commonly used anatomically shaped implants from three different manufacturers...
February 2016: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/26479823/alignment-of-sources-and-detectors-on-breast-surface-for-noncontact-diffuse-correlation-tomography-of-breast-tumors
#16
Chong Huang, Yu Lin, Lian He, Daniel Irwin, Margaret M Szabunio, Guoqiang Yu
Noncontact diffuse correlation tomography (ncDCT) is an emerging technology for 3D imaging of deep tissue blood flow distribution without distorting hemodynamic properties. To adapt the ncDCT for imaging in vivo breast tumors, we designed a motorized ncDCT probe to scan over the breast surface. A computer-aided design (CAD)-based approach was proposed to create solid volume mesh from arbitrary breast surface obtained by a commercial 3D camera. The sources and detectors of ncDCT were aligned on the breast surface through ray tracing to mimic the ncDCT scanning with CAD software...
October 10, 2015: Applied Optics
https://www.readbyqxmd.com/read/26353499/surface-characteristics-biodegradability-and-biocompatibility-of-porous-silicon-for-microfabricated-neural-electrode
#17
Tao Sun, Wei Mong Tsang, Woo-Tae Park, Srinivas Merugu
Porous Si (PSi) used for microfabrication of a novel neural electrode was prepared on Si wafers by an anodization process. Surface morphology and porous structure of the PSi were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). 3D inter-connected and nano sized pores were homogeneously formed across the surface. Wettability of the PSi was determined using a sessile drop method. Although Si-Hx functional groups on the PSi surface had negative effect on wettability, water contact angle of the PSi reduced to 34...
April 2015: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/26133623/comparison-of-breast-specific-gamma-imaging-and-molecular-breast-tomosynthesis-in-breast-cancer-detection-evaluation-in-phantoms
#18
COMPARATIVE STUDY
Zongyi Gong, Mark B Williams
PURPOSE: Breast specific gamma imaging or molecular breast imaging (BSGI) obtains 2D images of (99m)Tc sestamibi distribution in the breast. Molecular breast tomosynthesis (MBT) maps the tracer distribution in 3D by acquiring multiple projections over a limited angular range. Here, the authors compare the performance of the two technologies in terms of spatial resolution, lesion contrast, and contrast-to-noise ratio (CNR) in phantom studies under conditions of clinically relevant sestamibi dose and imaging time...
July 2015: Medical Physics
https://www.readbyqxmd.com/read/26127834/su-e-t-169-characterization-of-pacemaker-icd-dose-in-savi-hdr-brachytherapy
#19
C Kalavagunta, G Lasio, B Yi, J Zhou, M Lin
PURPOSE: It is important to estimate dose to pacemaker (PM)/Implantable Cardioverter Defibrillator (ICD) before undertaking Accelerated Partial Breast Treatment using High Dose Rate (HDR) brachytherapy. Kim et al. have reported HDR PM/ICD dose using a single-source balloon applicator. To the authors knowledge, there have so far not been any published PM/ICD dosimetry literature for the Strut Adjusted Volume Implant (SAVI, Cianna Medical, Aliso Viejo, CA). This study aims to fill this gap by generating a dose look up table (LUT) to predict maximum dose to the PM/ICD in SAVI HDR brachytherapy...
June 2015: Medical Physics
https://www.readbyqxmd.com/read/26127448/su-e-j-55-end-to-end-effectiveness-analysis-of-3d-surface-image-guided-voluntary-breath-holding-radiotherapy-for-left-breast
#20
M Lin, S Feigenberg
PURPOSE: To evaluate the effectiveness of using 3D-surface-image to guide breath-holding (BH) left-side breast treatment. METHODS: Two 3D surface image guided BH procedures were implemented and evaluated: normal-BH, taking BH at a comfortable level, and deep-inspiration-breath-holding (DIBH). A total of 20 patients (10 Normal-BH and 10 DIBH) were recruited. Patients received a BH evaluation using a commercialized 3D-surface- tracking-system (VisionRT, London, UK) to quantify the reproducibility of BH positions prior to CT scan...
June 2015: Medical Physics
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