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https://www.readbyqxmd.com/read/28214227/automated-breast-density-computation-in-digital-mammography-and-digital-breast-tomosynthesis-influence-on-mean-glandular-dose-and-birads-density-categorization
#1
Maria Castillo-García, Margarita Chevalier, Julia Garayoa, Alejandro Rodriguez-Ruiz, Diego García-Pinto, Julio Valverde
RATIONALE AND OBJECTIVES: The study aimed to compare the breast density estimates from two algorithms on full-field digital mammography (FFDM) and digital breast tomosynthesis (DBT) and to analyze the clinical implications. MATERIALS AND METHODS: We selected 561 FFDM and DBT examinations from patients without breast pathologies. Two versions of a commercial software (Quantra 2D and Quantra 3D) calculated the volumetric breast density automatically in FFDM and DBT, respectively...
February 14, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28153022/radiation-dose-affected-by-mammographic-composition-and-breast-size-first-application-of-a-radiation-dose-management-system-for-full-field-digital-mammography-in-korean-women
#2
Ji Eun Baek, Bong Joo Kang, Sung Hun Kim, Hyun Sil Lee
BACKGROUND: Relative to Western women, Korean women show several differences in breast-related characteristics, including higher rates of dense breasts and small breasts. We investigated how mammographic composition and breast size affect the glandular dose during full-field digital mammography (FFDM) in Korean women using a radiation dose management system. METHODS: From June 1 to June 30, 2015, 2120 FFDM images from 560 patients were acquired and mammographic breast composition and breast size were assessed...
February 2, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28149788/prevalence-of-ocular-demodicosis-among-patients-at-tertiary-care-center-bangkok-thailand
#3
Ngamjit Kasetsuwan, Kitchaporn Kositphipat, Mathu Busayarat, Pawanrat Threekhan, Kanok Preativatanyou, Atchara Phumee, Padet Siriyasatien
AIM: To determine the prevalence of ocular demodicosis by both microscopic examination and molecular detection among patients at King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok. METHODS: One hundred individuals were enrolled in the study and were divided into five age groups. The meibomian gland dysfunction (MGD) score and qualities of cylindrical dandruff (CD) were also determined. Demodex mite infestations of eyelash samples were screened by both microscopic examination and semi-nested polymerase chain reaction (PCR)...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28132878/emerging-strategies-for-the-diagnosis-and-treatment-of-meibomian-gland-dysfunction-proceedings-of-the-ocean-group-meeting
#4
Gerd Geerling, Christophe Baudouin, Pasquale Aragona, Maurizio Rolando, Kostas G Boboridis, José M Benítez-Del-Castillo, Yonca A Akova, Jesús Merayo-Lloves, Marc Labetoulle, Martin Steinhoff, Elisabeth M Messmer
Meibomian gland dysfunction (MGD) is a common and chronic disorder that has a significant adverse impact on patients' quality of life. It is a leading cause of evaporative dry eye disease (DED), as meibomian glands play an important role in providing lipids to the tear film, which helps to retard the evaporation of tears from the ocular surface. MGD is also often present in conjunction with primary aqueous-deficient DED. Obstructive MGD, the most commonly observed type of MGD, is the main ocus of this article...
January 26, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28116482/is-unilateral-neck-surgery-feasible-in-patients-with-sporadic-primary-hyperparathyroidism-and-double-negative-localisation
#5
D M Scott-Coombes, J Rees, G Jones, M J Stechman
INTRODUCTION: Ultrasound and Tc99mMIBI scans are used to localise parathyroid tumours in sporadic primary hyperparathyroidism (pHPT). Intra-operative PTH (ioPTH) assay facilitates unilateral neck exploration (UNE). When both ultrasound and MIBI are negative, it is our policy to explore the left side of the neck and only proceed to bilateral neck exploration (BNE) when either a tumour is not found or when ioPTH does not fall to >50% of the highest pre-excision value. The aim of this study was to investigate the outcome of our approach to 'double negative' patients...
January 23, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28099212/dysfunctional-tear-syndrome-dry-eye-disease-and-associated-tear-film-disorders-new-strategies-for-diagnosis-and-treatment
#6
REVIEW
Mark S Milner, Kenneth A Beckman, Jodi I Luchs, Quentin B Allen, Richard M Awdeh, John Berdahl, Thomas S Boland, Carlos Buznego, Joseph P Gira, Damien F Goldberg, David Goldman, Raj K Goyal, Mitchell A Jackson, James Katz, Terry Kim, Parag A Majmudar, Ranjan P Malhotra, Marguerite B McDonald, Rajesh K Rajpal, Tal Raviv, Sheri Rowen, Neda Shamie, Jonathan D Solomon, Karl Stonecipher, Shachar Tauber, William Trattler, Keith A Walter, George O Waring, Robert J Weinstock, William F Wiley, Elizabeth Yeu
Dysfunctional tear syndrome (DTS) is a common and complex condition affecting the ocular surface. The health and normal functioning of the ocular surface is dependent on a stable and sufficient tear film. Clinician awareness of conditions affecting the ocular surface has increased in recent years because of expanded research and the publication of diagnosis and treatment guidelines pertaining to disorders resulting in DTS, including the Delphi panel treatment recommendations for DTS (2006), the International Dry Eye Workshop (DEWS) (2007), the Meibomian Gland Dysfunction (MGD) Workshop (2011), and the updated Preferred Practice Pattern guidelines from the American Academy of Ophthalmology pertaining to dry eye and blepharitis (2013)...
January 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28093340/bacteriological-profile-of-ocular-surface-flora-in-meibomian-gland-dysfunction
#7
Shao Dan Zhang, Jing Na He, Tong Tong Niu, Chiu Yeung Chan, Chun Yang Ren, Shan Shan Liu, Yang Qu, Kam Lung Chong, Hai Lin Wang, Jun Tao, Chi Pui Pang
PURPOSE: To compare the bacteriological profile of meibomian gland secretion and conjunctival cul-de-sac in subjects with and without meibomian gland dysfunction (MGD). METHODS: This hospital-based study enrolled 201 eyes from 201 MGD patients and 84 eyes from 84 age- and gender-matched controls. Samples from the conjunctivae and meibomian gland secretion were obtained. Both aerobic and anaerobic cultures were performed. Differences in the culture-positivity and bacterial strains between two groups were compared...
January 13, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28075335/towards-standardization-of-x-ray-beam-filters-in-digital-mammography-and-digital-breast-tomosynthesis-monte-carlo-simulations-and-analytical-modelling
#8
Suman Shrestha, Srinivasan Vedantham, Andrew Karellas
In digital breast tomosynthesis and digital mammography, the x-ray beam filter material and thickness vary between systems. Replacing K-edge filters with Al was investigated with the intent to reduce exposure duration and to simplify system design. Tungsten target x-ray spectra were simulated with K-edge filters (50 µm Rh; 50 µm Ag) and Al filters of varying thickness. Monte Carlo simulations were conducted to quantify the x-ray scatter from various filters alone, scatter-to-primary ratio (SPR) with compressed breasts, and to determine the radiation dose to the breast...
March 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28064087/modelling-the-link-amongst-fine-pore-diffuser-fouling-oxygen-transfer-efficiency-and-aeration-energy-intensity
#9
Manel Garrido-Baserba, Reza Sobhani, Pitiporn Asvapathanagul, Graham W McCarthy, Betty H Olson, Victory Odize, Ahmed Al-Omari, Sudhir Murthy, Andrea Nifong, Johnnie Godwin, Charles B Bott, Michael K Stenstrom, Andrew R Shaw, Diego Rosso
This research systematically studied the behavior of aeration diffuser efficiency over time, and its relation to the energy usage per diffuser. Twelve diffusers were selected for a one year fouling study. Comprehensive aeration efficiency projections were carried out in two WRRFs with different influent rates, and the influence of operating conditions on aeration diffusers' performance was demonstrated. This study showed that the initial energy use, during the first year of operation, of those aeration diffusers located in high rate systems (with solids retention time - SRT-less than 2 days) increased more than 20% in comparison to the conventional systems (2 > SRT)...
December 19, 2016: Water Research
https://www.readbyqxmd.com/read/28060066/assessment-of-the-tear-meniscus-by-strip-meniscometry-and-keratograph-in-patients-with-dry-eye-disease-according-to-the-presence-of-meibomian-gland-dysfunction
#10
Kang Won Lee, Jung Yong Kim, Hee Seung Chin, Kyoung Yul Seo, Tae-Im Kim, Ji Won Jung
PURPOSE: We aimed to compare the tear meniscus measurements using strip meniscometry (SM) and Keratograph5M (K5M) between 3 subtypes of dry eye disease patient groups, classified according to the presence of meibomian gland dysfunction (MGD), and normal subjects. METHODS: We enrolled 145 eyes from 145 subjects and measured the tear meniscus using SM and K5M, tear film breakup time, ocular surface staining, and ocular surface disease index; the Schirmer test; and examined lid margins and meibomian glands...
February 2017: Cornea
https://www.readbyqxmd.com/read/28060064/automated-measurement-of-tear-film-dynamics-and-lipid-layer-thickness-for-assessment-of-non-sj%C3%A3-gren-dry-eye-syndrome-with-meibomian-gland-dysfunction
#11
Yong Woo Ji, Jeihoon Lee, Hun Lee, Kyoung Yul Seo, Eung Kweon Kim, Tae-Im Kim
PURPOSE: To investigate automated values from an advanced corneal topographer with a built-in real keratometer, color camera, and ocular surface interferometer for the evaluation of non-Sjögren dry eye syndrome (NSDES) with meibomian gland dysfunction (MGD). METHODS: Sixty-four patients (64 eyes) diagnosed with NSDES with MGD were enrolled. All eyes were evaluated using the Ocular Surface Disease Index (OSDI), fluorescence staining score, tear film breakup time (TBUT), Schirmer test, and MGD grade...
February 2017: Cornea
https://www.readbyqxmd.com/read/28048420/su-f-r-27-use-local-shape-descriptor-based-on-geodesic-distance-to-predict-survival-in-non-small-cell-lung-cancer-after-radiotherapy
#12
H Zhang, L Yan, K Huang, F Kong, J Jin
PURPOSE: The shape of the Positron Emission Tomography (PET) image represents the heterogeneity of tumor growth in various directions, and thus could be associated with tumor malignancy. We have proposed a median geodesic distance (MGD) to represent the local complexity of the shape and use a normalized MGD (NMGD) to quantify the shape, and found a potential correlation of NMGD to survival in a 20-patient pilot study. This study was to verify the finding in a larger patient cohort. METHODS: Geodesic distance of two vertices on a surface is defined as the shortest path on the surface connecting the two vertices...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048364/we-fg-207a-01-introduction-to-dedicated-breast-ct-early-studies
#13
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/28047717/we-fg-207a-02-why-we-need-breast-ct-clinical-perspective
#14
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/28047520/we-fg-207a-05-dedicated-breast-ct-as-a-diagnostic-imaging-tool-physics-and-clinical-feasibility
#15
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/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/28046981/we-de-207b-01-optimization-for-contrast-enhanced-spectral-mammography-based-on-photon-counting-detectors
#17
H Ding, S Molloi
PURPOSE: To investigate the feasibility of optimizing the imaging parameters for contrast-enhanced spectral mammography based on Si strip photon-counting detectors. METHODS: A computer simulation model using polyenergetic spectra from a tungsten anode x-ray tube and a Si-based photon-counting detector was evaluated for contrast-enhanced spectral mammography. The simulation traces the emission of photons from the x-ray source, attenuation through the breast and subsequent absorption in the detector...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046408/we-fg-207a-04-performance-characteristics-of-photon-counting-breast-ct
#18
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/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/28030610/impact-of-chronic-smoking-on-meibomian-gland-dysfunction
#20
Shen Wang, Hui Zhao, Caihong Huang, Zhengri Li, Wei Li, Xiaobo Zhang, Zuguo Liu
PURPOSE: The aim of this study was to explore the relationship between chronic cigarette smoking and meibomian gland dysfunction (MGD). METHODS: This study enrolled 322 smokers with MGD and 2067 non-smokers with MGD. All enrolled subjects were tested in the following sequence: Ocular Surface Disease Index (OSDI), tear film breakup time (TBUT), corneal fluorescein staining (CFS), Schirmer I test (SIT)and finally slit-lamp microscope examination of lid margin abnormalities, meibomian gland expression as well as meibum...
2016: PloS One
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