26
|
Olaiya MT, Kim J, Nelson MR, Srikanth VK, Bladin CF, Gerraty RP, Fitzgerald SM, Phan T, Frayne J, Cadilhac DA, Thrift AG. Effectiveness of a shared team approach between nurses and doctors for improved risk factor management in survivors of stroke: a cluster randomized controlled trial. Eur J Neurol 2017; 24:920-928. [DOI: 10.1111/ene.13306] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 04/03/2017] [Indexed: 11/30/2022]
|
27
|
Conroy L, Watt E, Quirk S, Conway J, Olivotto I, Phan T, Smith W. EP-1627: Anatomical advantages of deep inspiration breath hold for breast radiotherapy: a geometric analysis. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)32062-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
28
|
Conway J, Conroy L, Harper L, Scheifele M, Smith W, Graham T, Phan T, Li H, Olivotto I. PO-0870: DIBH produces a meaningful reduction in lung dose for some women with right-sided breast cancer. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31307-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
29
|
Biggs SN, Weichard AJ, Tamanyan K, Walter LM, Phan T, Davey MJ, Nixon GM, Horne RS. 0871 INCREASED RISK OF BEHAVIOR PROBLEMS AND POOR QUALITY OF LIFE IN OVERWEIGHT AND OBESE CHILDREN AND ADOLESCENTS WITH SLEEP DISORDERED BREATHING. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
30
|
Morrissey O, Westall G, Ffrench R, Edgell T, Cristiano Y, Phan T, Levvey B, Snell G, de Silva H. Cytokine Profiles of Aspergillus Isolation in Lung Transplant Recipients (LTR). J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
31
|
Ho CK, Kornaga EN, Klimowicz AC, Enwere EK, Dean M, Bebb GD, Phan T, Ghatage P, Magliocco AM, Lees-Miller SP, Doll CM. Expression of DNA damage response proteins in cervical cancer patients treated with radical chemoradiotherapy. Gynecol Oncol 2017; 145:176-184. [PMID: 28131528 DOI: 10.1016/j.ygyno.2016.12.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 12/23/2016] [Accepted: 12/28/2016] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The management of locally advanced cervical cancer has improved significantly with the advent of cisplatin-based chemoradiotherapy (CRT) as the primary treatment regimen. Nevertheless, a significant proportion of patients fail to respond or relapse on this treatment and have a very poor prognosis. Our goal was to determine the prognostic value of a panel of proteins involved in detection and repair of DNA damage. METHODS We performed fluorescence immunohistochemistry, and used software analysis to assess expression of DNA damage response proteins ATM, DNA-PKcs, PARP-1, Ku70 and Ku86 in 117 pre-treatment specimens from patients with locally advanced cervical cancer. We compared expression to clinicopathologic correlates to determine prognostic significance. RESULTS Five-year progression-free survival was significantly lower in the low expressors than in high expressors of ATM (35% vs. 58%, p=0.044) and PARP-1 (24% vs. 61%, p=0.003), and showed a trend to significance for DNA-PKcs (30% vs. 60%, p=0.050). Low expression of the same proteins also correlated significantly with lower overall survival. In multivariable analysis, adjusted for FIGO stage and tumor size, low ATM and PARP-1 expression was significantly associated with both poorer progression-free and overall survival. Pairwise analyses indicated that expression levels of these proteins were correlated. CONCLUSIONS Expression of DNA damage response proteins in cervical cancer is associated with outcome in patients treated with CRT. Immunohistochemical analysis of these proteins may be useful in guiding treatment decisions in such patients.
Collapse
|
32
|
Bale SD, Goetz K, Harvey PR, Turin P, Bonnell JW, de Wit TD, Ergun RE, MacDowall RJ, Pulupa M, Andre M, Bolton M, Bougeret JL, Bowen TA, Burgess D, Cattell CA, Chandran BDG, Chaston CC, Chen CHK, Choi MK, Connerney JE, Cranmer S, Diaz-Aguado M, Donakowski W, Drake JF, Farrell WM, Fergeau P, Fermin J, Fischer J, Fox N, Glaser D, Goldstein M, Gordon D, Hanson E, Harris SE, Hayes LM, Hinze JJ, Hollweg JV, Horbury TS, Howard RA, Hoxie V, Jannet G, Karlsson M, Kasper JC, Kellogg PJ, Kien M, Klimchuk JA, Krasnoselskikh VV, Krucker S, Lynch JJ, Maksimovic M, Malaspina DM, Marker S, Martin P, Martinez-Oliveros J, McCauley J, McComas DJ, McDonald T, Meyer-Vernet N, Moncuquet M, Monson SJ, Mozer FS, Murphy SD, Odom J, Oliverson R, Olson J, Parker EN, Pankow D, Phan T, Quataert E, Quinn T, Ruplin SW, Salem C, Seitz D, Sheppard DA, Siy A, Stevens K, Summers D, Szabo A, Timofeeva M, Vaivads A, Velli M, Yehle A, Werthimer D, Wygant JR. The FIELDS Instrument Suite for Solar Probe Plus: Measuring the Coronal Plasma and Magnetic Field, Plasma Waves and Turbulence, and Radio Signatures of Solar Transients. SPACE SCIENCE REVIEWS 2016; 204:49-82. [PMID: 29755144 PMCID: PMC5942226 DOI: 10.1007/s11214-016-0244-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
NASA's Solar Probe Plus (SPP) mission will make the first in situ measurements of the solar corona and the birthplace of the solar wind. The FIELDS instrument suite on SPP will make direct measurements of electric and magnetic fields, the properties of in situ plasma waves, electron density and temperature profiles, and interplanetary radio emissions, amongst other things. Here, we describe the scientific objectives targeted by the SPP/FIELDS instrument, the instrument design itself, and the instrument concept of operations and planned data products.
Collapse
|
33
|
Schuck-Phan A, Phan T, Dawson PA, Dial EJ, Bell C, Liu Y, Rhoads JM, Lichtenberger LM. Formula Feeding Predisposes Gut to NSAID-Induced Small Intestinal Injury. ACTA ACUST UNITED AC 2016; 6. [PMID: 31565540 DOI: 10.4172/2161-1459.1000222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Objectives Breast feeding protects infants from many diseases, including necrotizing enterocolitis, peptic ulceration and infectious diarrhea. Conversely, maternal separation stress and Non-Steroidal Anti-Inflammatory Drugs (NSAID's) can induce intestinal injury and bleeding. This study aimed to evaluate in suckling rats if maternal separation/formula feeding leads to increased intestinal sensitivity to indomethacin (indo)-induced intestinal injury and to look at potential mechanisms involved. Methods Nine-day-old rats were dam-fed or separated/trained to formula-feed for 6 days prior to indo administration (5 mg/kg/day) or saline (control) for 3 days. Intestinal bleeding and injury were assessed by measuring luminal and Fecal Hemoglobin (Hob) and jejunal histology. Maturation of the intestine was assessed by measuring luminal bile acids, jejunal sucrase, serum corticosterone, and mRNA expression of ileal Apical Sodium-Dependent Bile Acid Transporter (ASBT). Results At 17 days, formula-fed indo-treated pups had a 2-fold increase in luminal Hb compared to formula-fed control pups and had evidence of morphological injury to the small intestinal mucosa as observed at the light microscopic level, whereas indo had no effect on dam-fed littermates. In addition, formula-fed rats had significant increases in luminal bile acid, sucrase specific activity, serum corticosterone, and expression of ASBT mRNA compared to dam-fed rats. Conclusion Maternal separation stress may cause early intestinal maturational changes induced by corticosteroid release, including increased epithelial exposure to bile acids. These maturational changes may have a sensitizing rather than protective effect against indo-induced injury in the new-born.
Collapse
|
34
|
Tobias B, Domier CW, Luhmann NC, Luo C, Mamidanna M, Phan T, Pham AV, Wang Y. Low-noise heterodyne receiver for electron cyclotron emission imaging and microwave imaging reflectometry. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:11E103. [PMID: 27910660 DOI: 10.1063/1.4959273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The critical component enabling electron cyclotron emission imaging (ECEI) and microwave imaging reflectometry (MIR) to resolve 2D and 3D electron temperature and density perturbations is the heterodyne imaging array that collects and downconverts radiated emission and/or reflected signals (50-150 GHz) to an intermediate frequency (IF) band (e.g. 0.1-18 GHz) that can be transmitted by a shielded coaxial cable for further filtering and detection. New circuitry has been developed for this task, integrating gallium arsenide (GaAs) monolithic microwave integrated circuits (MMICs) mounted on a liquid crystal polymer (LCP) substrate. The improved topology significantly increases electromagnetic shielding from out-of-band interference, leads to 10× improvement in the signal-to-noise ratio, and dramatic cost savings through integration. The current design, optimized for reflectometry and edge radiometry on mid-sized tokamaks, has demonstrated >20 dB conversion gain in upper V-band (60-75 GHz). Implementation of the circuit in a multi-channel electron cyclotron emission imaging (ECEI) array will improve the diagnosis of edge-localized modes and fluctuations of the high-confinement, or H-mode, pedestal.
Collapse
|
35
|
Lichtenberger LM, Phan T, Fang D, Edler S, Philip J, Li-Geng T, Dial EJ. Bioavailability of aspirin in rats comparing the drug's uptake into gastrointestinal tissue and vascular and lymphatic systems: implications on aspirin's chemopreventive action. JOURNAL OF PHYSIOLOGY AND PHARMACOLOGY : AN OFFICIAL JOURNAL OF THE POLISH PHYSIOLOGICAL SOCIETY 2016; 67:635-642. [PMID: 28011944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/31/2016] [Indexed: 06/06/2023]
Abstract
Aspirin is an effective analgesic and antiplatelet drug that in addition to its ability to reduce pain, inflammation and fever, appears to have efficacy in the prevention/treatment of a range of diseases including heart disease, numerous cancers and Alzheimer's. It is important to understand the bioavailability of aspirin and its major metabolite, salicylic acid, since dosage and route of administration can vary for treating differing diseases, and the major side-effects of aspirin, upper gastrointestinal ulceration and bleeding, are dose-dependent. We examined the time course for gastroduodenal uptake of aspirin and the appearance of its major metabolite salicylic acid in blood and lymph after intragastric (to simulate oral) and intraduodenal (to simulate enteric-coating) dosing in rats. Results show that after intragastric dosing, intact aspirin is absorbed primarily by the gastric mucosa and to a lesser extent by the duodenal mucosa. When aspirin is dosed intragastrically or intraduodenally, a much greater concentration of aspirin enters the lymph than the blood. In contrast, the concentration of salicylic acid was higher in blood than in lymph. Lymph levels of both aspirin and salicylic acid were sufficiently high so as to perform a pharmacologic function there, possibly as a chemopreventive agent against colon cancer and potentially the metastatic spread of non-gastrointestinal cancers.
Collapse
|
36
|
Taggar A, Phan T, Traptow L, Banerjee R, Doll C. Cervical Cancer Brachytherapy in Canada: A Focus on Interstitial Brachytherapy Utilization. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
37
|
Prabhu S, Mackin V, McLellan A, Phan T, MGlade D, Pathik B, Nalliah C, Voskoboinik A, Azzopardi S, Lee G, Mariani J, Taylor A, Kalman J, Kistler P. Determining the Dose of Adenosine for Dormant Pulmonary Vein Conduction Following AF Ablation: Electrophysiological and Haemodynamic Assessment. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
38
|
Phan T, Mula-Hussain L, Pavamani S, Pearce A, D'Souza D, Patil NG, Traptow L, Doll CM. The changing landscape of brachytherapy for cervical cancer: a Canadian practice survey. ACTA ACUST UNITED AC 2015; 22:356-60. [PMID: 26628868 DOI: 10.3747/co.22.2562] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND We documented changes in practice from 2009 to 2012 for cervical cancer brachytherapy in Canada. METHODS Centres with gynecologic brachytherapy services were sent an e-mail questionnaire querying their 2012 practice. Responses are reported and compared with practice patterns identified in a similar survey for 2009. RESULTS The response rate was 77% (24 of 31 centres). Almost all use high-dose-rate brachytherapy (92%); low-dose-rate brachytherapy has been completely phased out. Most continue to move patients from the site of applicator insertion to the radiation treatment simulation suite (75%) or to a diagnostic imaging department (29%), or both. In 2012, the imaging modalities used for dose specification were computed tomography [ct (75%)], magnetic resonance imaging [mri (38%)], plain radiography (21%), and cone-beam ct (8%). The number of institutions using mri guidance has markedly increased during the period of interest (9 vs. 1). Most respondents (58% vs. 14%) prescribed using guidelines from the Groupe Européen de Curiethérapie and the European Society for Therapeutic Radiology and Oncology, but they also used point A as a reference. Commonly used high-dose radiation regimens included 30 Gy in 5 fractions and 24 Gy in 3 fractions. CONCLUSIONS In Canada, image-guided brachytherapy for cervical cancer continues to evolve. Although ct-based imaging remains the most commonly used modality, many centres have adopted mri for at least 1 brachytherapy treatment. More centres are using fewer fractions and a slightly lower biologically effective dose, but are still achieving EQD2 (2-Gy equivalent) doses of 80-90 Gy in combination with external-beam radiation therapy.
Collapse
|
39
|
Enwere E, Kornaga E, Koulis T, Dean M, Phan T, Ghatage P, Magliocco A, Lees-Miller S, Doll C. 334 PD-L1 expression and survival in patients with locally advanced cervical cancer treated with chemoradiotherapy. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30198-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
40
|
Conroy L, Yeung R, Quirk S, Phan T, Hudson A, Smith WL. SU-E-J-62: Breath Hold for Left-Sided Breast Cancer: Visually Monitored Deep Inspiration Breath Hold Amplitude Evaluated Using Real-Time Position Management. Med Phys 2015. [DOI: 10.1118/1.4924149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
41
|
Sadeghi P, Banerjee R, Alghamdi M, Phan T, Taggar A, Smith W. SU-E-T-509: Inter-Observer and Inter-Modality Contouring Analysis for Organs at Risk for HDR Gynecological Brachytherapy. Med Phys 2015. [DOI: 10.1118/1.4924871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
42
|
Abstract
Human metapneumovirus (hMPV) and respiratory syncytial virus, its close family member, are two major causes of lower respiratory tract infection in the paediatric population. hMPV is also a common cause of worldwide morbidity and mortality in immunocompromised patients and older adults. Repeated infections occur often, demonstrating a heavy medical burden. However, there is currently no hMPV-specific prevention treatment. This review focuses on the current literature on hMPV vaccine development. We believe that a better understanding of the role(s) of viral proteins in host responses might lead to efficient prophylactic vaccine development.
Collapse
|
43
|
Ho C, Kornaga E, Klimowicz A, Dean M, Bebb G, Phan T, Ghatage P, Magliocco A, Lees-Miller S, Doll C. Expression of DNA Damage Response Proteins in Cervical Cancer Patients Treated With Radical Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
44
|
Yeung R, Conroy L, Long K, Smith W, Hudson A, Moore R, Dirkse C, Phan T. Visually Monitored Deep Inspiration Breath Hold Technique in Left-Sided Breast Cancer Patients Treated With Adjuvant Radiation Therapy: Reproducibility and Reliability. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
45
|
Yeung R, Long K, Walrath D, Smith W, Hudson A, Phan T. Evaluation of Cardiac Dose Reduction With Deep Inspiration Breath Hold in Patients With Left-Sided Breast Cancer Receiving Adjuvant Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
46
|
Prickett SR, Voskamp AL, Phan T, Dacumos-Hill A, Mannering SI, Rolland JM, O'Hehir RE. Ara h 1 CD4+ T cell epitope-based peptides: candidates for a peanut allergy therapeutic. Clin Exp Allergy 2014; 43:684-97. [PMID: 23711131 PMCID: PMC3709139 DOI: 10.1111/cea.12113] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 02/25/2013] [Accepted: 02/27/2013] [Indexed: 12/01/2022]
Abstract
Background Peanut allergy is a life-threatening condition; there is currently no cure. While whole allergen extracts are used for specific immunotherapy for many allergies, they can cause severe reactions and even fatalities in peanut allergy. Objective To identify short, HLA-degenerate CD4+ T cell epitope-based peptides of the major peanut allergen Ara h 1 that target allergen-specific T cells without causing IgE-mediated inflammatory cell activation, as candidates for safe peanut-specific immunotherapy. Methods Ara h 1-specific CD4+ T cell lines (TCL) were generated from peripheral blood mononuclear cells (PBMC) of peanut-allergic subjects using CFSE-based methodology. T cell epitopes were identified using CFSE and thymidine-based proliferation assays. Epitope HLA-restriction was investigated using blocking antibodies, HLA-genotyping and epitope prediction algorithms. Functional peanut-specific IgE reactivity to peptides was assessed by basophil activation assay. Results A total of 145 Ara h 1-specific TCL were generated from 18 HLA-diverse peanut-allergic subjects. The TCL recognized 20-mer peptides throughout Ara h 1. Nine 20-mers containing the most frequently recognized epitopes were selected and their recognition confirmed in 18 additional peanut-allergic subjects. Ten core epitopes were mapped within these 20-mers. These were HLA-DQ and/or HLA–DR restricted, with each presented on at least two different HLA-molecules. Seven short (≤ 20 aa) non-basophil-reactive peptides encompassing all core epitopes were designed and validated in peanut-allergic donor PBMC T cell assays. Conclusions and Clinical Relevance Short CD4+ T cell epitope-based Ara h 1 peptides were identified as novel candidates for a safe, T cell targeted peanut-specific immunotherapy for HLA-diverse populations.
Collapse
|
47
|
Siegel N, Gross M, Ho C, Phan T, Yuan J. Physical Properties of Solid Particle Thermal Energy Storage Media for Concentrating Solar Power Applications. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.egypro.2014.03.109] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
48
|
Worley S, Patel M, Phan T, James S, Turley J, Gohn D. Transvenous placement of the subcutaneous coil electrode to reduce elevated defibrillation thresholds: an alternative to an azygous or subcutaneous coil. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
49
|
Phan T, Jagdis A, Klimowicz A, Laskin J, Lau H, Petrillo S, Siever J, Thompson T, Magliocco A, Hao D. E-Cadherin and β-Catenin Expression in Patients with Nasopharyngeal Carcinoma (NPC) undergoing Curative Intent Radiation ± Platinum Chemotherapy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
50
|
Yang G, Qian X, Phan T, Sprenger F, Sultana S, Calderon-Colon X, Kearse B, Spronk D, Lu J, Zhou O. Design and feasibility studies of a stationary digital breast tomosynthesis system. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT 2011; 648:S220-S223. [PMID: 21808428 PMCID: PMC3146055 DOI: 10.1016/j.nima.2010.11.147] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Studies have shown that digital breast tomosynthesis (DBT) can improve breast cancer diagnosis by reconstructing 3D images. However, DBT scanners based on rotation gantry prolong the imaging time and reduce spatial resolution due to motion comparing with the regular two-view mammography. To obtain three dimension reconstruction images and maintain the high image quality of conventional mammography, we proposed a prototype stationary digital breast tomosynthesis system (s-DBT). The proposed s-DBT system acquires projection images without mechanical movement. The core component of the s-DBT system is a specially designed spatially distributed multi-beam x-ray tube based on the carbon nanotube field emission x-ray technology. The multi-beam x-ray source array enables collection of all projection images from different viewing angles without mechanical motion. Preliminary results show the s-DBT system can achieve a scan time comparable to the regular two-view mammography, and improve the spatial resolution comparing with rotating gantry DBT.
Collapse
|