keyword
MENU ▼
Read by QxMD icon Read
search

3D scan AND breast

keyword
https://www.readbyqxmd.com/read/28211058/a-feasibility-study-of-a-hybrid-breast-immobilization-system-for-early-breast-cancer-in-proton-beam-therapy
#1
Takeshi Arimura, Takashi Ogino, Takashi Yoshiura, Mitsugi Matsuyama, Naoaki Kondo, Hideki Miyazaki, Akari Sakuragi, Takayuki Ohara, Etsuyo Ogo, Yoshio Hishikawa
PURPOSE: We aimed to develop a new breast-immobilizing system for proton beam therapy (PBT) of early breast cancer (EBC) that would provide the optimum breast shape during the treatment as well as increased fixation reliability by reducing the influence of respiratory movement. METHODS: The breast-immobilizing system (HyBIS; Hybrid Breast-Immobilizing System) consists of a whole body immobilization system (WBIS), position converting device (to change patient position), photo scanning system, breast cup (made using a three-dimensional printer), breast cup fitting apparatus, breast cup holding device (to ensure the breast remains lifted in the supine position), and dedicated stretcher fixed to the WBIS (to carry the patient)...
February 16, 2017: Medical Physics
https://www.readbyqxmd.com/read/28206760/nano-engineered-eggshell-silver-tailored-co-polyester-polymer-blend-film-with-antimicrobial-properties
#2
Boniface J Tiimob, Gregory Mwinyelle, Woubit Abdela, Temesgen Samuel, Shaik Jeelani, Vijaya K Rangari
In this study, the reinforcement effect of different proportions of eggshell/silver nanomaterial (ES-Ag) on structural and antimicrobial properties of 70/30 poly (butylene-co-adipate terephthalate)/polylactic acid (PBAT/PLA) immiscible blends were investigated. The ES-Ag was synthesized using a single step ball milling process, and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). These results confirmed the existence of silver nanoparticles (Ag NPs) in the interstitial spaces of the eggshell particles...
February 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28174297/decorin-inducible-peg3-evokes-beclin-1-mediated-autophagy-and-thrombospondin-1-mediated-angiostasis
#3
Annabel Torres, Maria A Gubbiotti, Renato V Iozzo
We previously discovered that systemic delivery of decorin for treatment of breast carcinoma xenografts induces the paternally expressed gene 3 (Peg3), an imprinted gene encoding a zinc finger transcription factor postulated to function as a tumor suppressor. Here we found that de novo expression of Peg3 increased Beclin 1 promoter activity and protein expression. This process required the full-length Peg3 as truncated mutants lacking either the N-terminal SCAN domain or the zinc fingers failed to translocate to the nucleus and promote Beclin 1 transcription...
February 7, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28166261/radiomic-analysis-reveals-dce-mri-features-for-prediction-of-molecular-subtypes-of-breast-cancer
#4
Ming Fan, Hui Li, Shijian Wang, Bin Zheng, Juan Zhang, Lihua Li
The purpose of this study was to investigate the role of features derived from breast dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and to incorporated clinical information to predict the molecular subtypes of breast cancer. In particular, 60 breast cancers with the following four molecular subtypes were analyzed: luminal A, luminal B, human epidermal growth factor receptor-2 (HER2)-over-expressing and basal-like. The breast region was segmented and the suspicious tumor was depicted on sequentially scanned MR images from each case...
2017: PloS One
https://www.readbyqxmd.com/read/28107436/a-micro-ct-study-in-patients-with-breast-microcalcifications-using-a-mathematical-algorithm-to-assess-3d-structure
#5
David Kenkel, Zsuzsanna Varga, Heike Heuer, Konstantin J Dedes, Nicole Berger, Lukas Filli, Andreas Boss
PURPOSE: The aim of this study was to evaluate the relevance of the three-dimensional (3D) structure of breast microcalcifications (MC) as a predictor of malignancy using highly resolved micro-computed tomography (micro-CT) datasets of biopsy samples. MATERIAL AND METHODS: The study included 28 women with suspicious MC in their mammogram undergoing vacuum-assisted biopsy. Directly after the intervention, the specimens were scanned in a micro-CT with an isometric spatial resolution of 9 μm...
2017: PloS One
https://www.readbyqxmd.com/read/28074018/evaluation-of-dose-homogeneity-in-cone-beam-breast-computed-tomography
#6
Giovanni Mettivier, Matilde Costa, Nico Lanconelli, Anna Ianiro, Mariagabriella Pugliese, Maria Quarto, Paolo Russo
The aim of this study is to determine, via measurements on phantoms and Monte Carlo (MC) simulations, the dose distribution of absorbed dose in a cone-beam breast computed tomography scan. The absorbed dose volume distribution was measured inside a polyethylene cylindrical phantom, simulating adipose breast tissue, using LiF:Mg,Ti thermoluminescence dosimeters. A reasonable agreement (between 2 and 8%) between the simulated and measured data was observed. The 3D distribution of absorbed dose was evaluated at 40, 60 and 80 kV in a phantom simulating a pendant breast...
January 10, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28048364/we-fg-207a-01-introduction-to-dedicated-breast-ct-early-studies
#7
S Vedantham
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047813/su-d-209-07-measure-the-average-glandular-dose-of-a-2d-3d-breast-imaging-protocol-using-ge-senoclaire-breast-tomosynthesis-system
#8
Y Liang, A Dutta
PURPOSE: To measure the average glandular dose (AGD) of a 2D+3D breast imaging protocol using GE SenoClaire breast tomosynthesis system. METHODS: This study used a GE SenoClaire breast tomosynthesis unit, a Gammex ACR mammography accreditation phantom, 5 cm thick PMMA phantom, an Unfors RaySafe X2 mammography detector. The breast imaging protocol includes a regular 2D CC view and a 3D MLO view at 45 degree, using AUTO mode. Both ACR phantom and PMMA phantom were scanned under AUTO mode with 10 daN compression to obtain the techniques of 2D CC view, 3D MLO view, and 3D CC view...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047717/we-fg-207a-02-why-we-need-breast-ct-clinical-perspective
#9
A O'Connell
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047664/we-de-207b-11-implementation-of-size-specific-3d-beam-modulation-filters-on-a-dedicated-breast-ct-platform-using-breast-immobilization
#10
A Hernandez, J Boone
PURPOSE: To implement a 3D beam modulation filter (3D-BMF) in dedicated breast CT (bCT) and develop a method for conforming the patient's breast to a pre-defined shape, optimizing the effects of the filter. This work expands on previous work reporting the methodology for designing a 3D-BMF that can spare unnecessary dose and improve signal equalization at the detector by preferentially filtering the beam in the thinner anterior and peripheral breast regions. METHODS: Effective diameter profiles were measured for 219 segmented bCT images, grouped into volume quintiles, and averaged within each group to represent the range of breast sizes found clinically...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047660/we-de-bra-02-best-in-physics-joint-imaging-therapy-prototype-for-an-in-room-supercompounded-3d-volumetric-ultrasound-image-guidance-system-for-prone-breast-sbrt
#11
T Chiu, Y Zhang, B Hrycushko, B Zhao, R Chopra, S Jiang, X Gu
PURPOSE: SBRT requires both substantial positioning precision and accuracy. However, accurate dose delivery is challenging for prone breast SBRT due to breast deformation, lumpectomy cavity shrinkage and ineffective CT/CBCT on soft tissue. We developed a prototype in-room 3D volumetric ultrasound (US) image guidance system for prone breast SBRT. METHODS: The designed system, set beneath a prone breast board, consists of a customized breast cup, rotational scanning water container, and a portable US scanner...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047544/su-f-j-176-development-of-a-patient-specific-3d-couplant-pad-for-ultrasound-igrt
#12
H Kim, A Chang, S Ye
PURPOSE: to overcome the several issues of ultrasound image-guided radiation therapy (US IGRT) such as probe pressure and optical tracking disability by using a patient-specific three-dimensional couplant pad (CP) fabricated by a patient's skin mold using a 3D printing technique. METHODS: A CP was then fabricated by pouring gelatin solution into a fixed-shape container accommodating the patient skin mold fabricated by a 3D printer. A breast phantom was fabricated with the compound of gelatin and agarose and a phantom study was carried out...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047520/we-fg-207a-05-dedicated-breast-ct-as-a-diagnostic-imaging-tool-physics-and-clinical-feasibility
#13
A Karellas
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047476/su-f-i-16-short-breast-mri-with-high-resolution-t2-weighted-and-dynamic-contrast-enhanced-t1-weighted-images
#14
J Ma, J Son, B Arun, J Hazle, K Hwang, K Wang, E Bayram, J Madewell, W Yang, B Dogan
PURPOSE: To develop and demonstrate a short breast (sb) MRI protocol that acquires both T2-weighted and dynamic contrast-enhanced T1-weighted images in approximately ten minutes. METHODS: The sb-MRI protocol consists of two novel pulse sequences. The first is a flexible fast spin-echo triple-echo Dixon (FTED) sequence for high-resolution fat-suppressed T2-weighted imaging, and the second is a 3D fast dual-echo spoiled gradient sequence (FLEX) for volumetric fat-suppressed T1-weighted imaging before and post contrast agent injection...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047213/th-ab-209-07-high-resolution-x-ray-induced-acoustic-computed-tomography
#15
L Xiang, S Tang, M Ahmad, L Xing
PURPOSE: X-ray radiographic absorption imaging is an invaluable tool in medical diagnostics, biology and materials science. However, the use of conventional CT is limited by two factors: the detection sensitivity to weak absorption material and the radiation dose from CT scanning. The purpose of this study is to explore X-ray induced acoustic computed tomography (XACT), a new imaging modality, which combines X-ray absorption contrast and high ultrasonic resolution to address these challenges...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047068/we-fg-207a-03-low-dose-cone-beam-breast-ct-physics-and-technology-development
#16
J Boone
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046408/we-fg-207a-04-performance-characteristics-of-photon-counting-breast-ct
#17
W Kalender
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046294/th-ab-209-12-tissue-equivalent-phantom-with-excised-human-tissue-for-assessing-clinical-capabilities-of-coherent-scatter-imaging-applications
#18
K Albanese, R Morris, J Spencer, J Greenberg, A Kapadia
PURPOSE: Previously we reported the development of anthropomorphic tissue-equivalent scatter phantoms of the human breast. Here we present the first results from the scatter imaging of the tissue equivalent breast phantoms for breast cancer diagnosis. METHODS: A breast phantom was designed to assess the capability of coded aperture coherent x-ray scatter imaging to classify different types of breast tissue (adipose, fibroglandular, tumor). The phantom geometry was obtained from a prone breast geometry scanned on a dedicated breast CT system...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046291/we-fg-207a-00-advances-in-dedicated-breast-ct
#19
Srinivasan Vedantham, Sabee Molloi
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28000609/an-in-vitro-3d-model-using-collagen-coated-gelatin-nanofibers-for-studying-breast-cancer-metastasis
#20
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
keyword
keyword
71158
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"