51
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DeMarco J, Saxon S, Fahimian B, Iwamoto K. SU-GG-T-492: Determining RBE Values for a New Miniaturized X-Ray Source. Med Phys 2010. [DOI: 10.1118/1.3468890] [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
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52
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Zumsteg Z, DeMarco J, Lee S, Steinberg M, Singhvi M, Lin C, Julliard G, McBride W, Lin K, Lee P. Using Megavoltage Cone Beam CT (MV CBCT) in Image-guided Radiation Therapy for Head and Neck Cancer. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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53
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Riofrio D, Keyes R, Hecht A, Luan S, Holzscheiter M, DeMarco J, Fahimian B. SU-FF-T-160: Planning Dynamic Particle Therapy. Med Phys 2009. [DOI: 10.1118/1.3181634] [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
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54
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Zhang D, Singhvi M, Lin C, Lin K, Lee S, Lee P, Zachary Z, Hussain A, Steinberg M, DeMarco J. SU-FF-J-15: A Retrospective Study of the Variation in Organ Dose as a Function of Table Shifts Using Megavoltage Cone-Beam CT. Med Phys 2009. [DOI: 10.1118/1.3181307] [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
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55
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Fahimian B, Cloetens P, Mao Y, Lee E, DeMarco J, McNitt-Gray M, Miao J. WE-E-304A-02: Development of Low Dose X-Ray Phase Contrast CT Using a Novel Projection Retrieval Reconstruction Algorithm. Med Phys 2009. [DOI: 10.1118/1.3182572] [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
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56
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Fahimian B, DeMarco J, Keyes R, Luan S, Zankl M, Holzscheiter M. WE-C-BRB-06: Antiproton Radiotherapy: Development of Physically and Biologically Optimized Monte Carlo Treatment Planning Systems for Intensity and Energy Modulated Delivery. Med Phys 2009. [DOI: 10.1118/1.3182464] [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
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57
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Zhang D, DeMarco J, Cagnon C, Angel E, Turner A, Zankl M, McNitt-Gray M. TU-C-304A-06: Reducing Dose to a Small Organ by Varying the Tube Start Angle in a Helical CT Scan. Med Phys 2009. [DOI: 10.1118/1.3182354] [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
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58
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DeMarco J, Fahimian B, Iwamoto K, Holt R. SU-FF-T-07: Treatment Planning Considerations and the Effect of Tissue Heterogeneities On the Absorbed Dose Distribution From the Xoft Axxent 50 KVp Electronic Brachytherapy Source. Med Phys 2009. [DOI: 10.1118/1.3181478] [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
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59
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Angel E, DeMarco J, Cagnon C, McNitt-Gray M. SU-FF-I-30: Generating Attenuation-Based Tube Current Modulation (TCM) Schema Based On Voxelized Patient Models to Be Used in Simulations Estimating Organ Dose From CT. Med Phys 2009. [DOI: 10.1118/1.3181149] [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
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Angel E, Yaghmai N, Kim H, DeMarco J, Cagnon C, Turner A, Zhang D, Goldin J, McNitt-Gray M. WE-D-332-03: How Well Does CTDI Estimate Organ Dose to Patients From Multidetector (MDCT) Imaging? Med Phys 2008. [DOI: 10.1118/1.2962756] [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
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61
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Turner A, Angel E, Zhang D, DeMarco J, Cagnon C, McNitt-Gray M. SU-GG-I-62: The Relationship Between Half Value Layer and CTDI for Multidetector CT (MDCT). Med Phys 2008. [DOI: 10.1118/1.2961460] [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
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62
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Speiser M, DeMarco J. SU-GG-T-337: A Method of Effective Attenuation That Preserves Detailed MLC Characteristics and Replicates Spectral Effects of Deliberate Transport. Med Phys 2008. [DOI: 10.1118/1.2962089] [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
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63
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Fahimian B, DeMarco J, Holzscheiter M, Keyes R, Bassler N, Iwamoto K, Zankl M. MO-E-AUD B-02: Antiproton Therapy: Monte Carlo Simulations of Normal Tissue Equivalent Dose From Annihilation Neutrons. Med Phys 2008. [DOI: 10.1118/1.2962384] [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
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64
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Fahimian B, Miao J, Chatziioannou A, DeMarco J. MO-D-332-06: Dose Reduction in CT Using a Novel Fourier-Based Iterative Reconstruction Method. Med Phys 2008. [DOI: 10.1118/1.2962365] [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
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65
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Liu X, DeMarco J, Lee S. SU-GG-J-40: Automated Detection of Gold Seeds in Prostate Electronic Portal Images. Med Phys 2008. [DOI: 10.1118/1.2961598] [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
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Angel E, Yaghmai N, DeMarco J, Cagnon C, Cody D, Stevens D, McCollough C, Primak A, Goldin J, McNitt-Gray M. SU-FF-I-129: Monte Carlo Simulation to Assess Organ Dose From Coronary CT Angiography (CTA) Exams Using Patient-Based Voxelized Models. Med Phys 2007. [DOI: 10.1118/1.2760505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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67
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McDermott A, McNitt-Gray M, White R, Angel E, Cagnon C, DeMarco J, Cody D. TU-C-L100J-06: Pediatric Organ Dose Measurements in Axial and Helical Multi-Slice CT. Med Phys 2007. [DOI: 10.1118/1.2761326] [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
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68
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Speiser M, DeMarco J, Agazaryan N, Chetty I, Solberg T, Kesner A. SU-FF-T-149: Development and Validation of An MCNPX Monte Carlo IMRT Source Model with Optimized Radiotherapy Interface and Comparative Analysis Software. Med Phys 2007. [DOI: 10.1118/1.2760808] [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
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69
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Liu X, DeMarco J. SU-FF-J-41: Edge Enhancement Algorithm for Gold Seeds in Prostate Electronic Portal Images. Med Phys 2007. [DOI: 10.1118/1.2760546] [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
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70
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Angel E, Wellnitz C, Goodsitt M, DeMarco J, Cagnon C, Cody D, Stevens D, McCollough C, Primak A, McNitt-Gray M. TU-E-330D-02: Monte Carlo Simulation to Assess Fetal Dose From MDCT Imaging Using Patient Based Voxelized Models. Med Phys 2006. [DOI: 10.1118/1.2241613] [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
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71
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Kelloway JS, Wyatt R, DeMarco J, Adlis S. Effect of salmeterol on patients' adherence to their prescribed refills for inhaled corticosteroids. Ann Allergy Asthma Immunol 2000; 84:324-8. [PMID: 10752917 DOI: 10.1016/s1081-1206(10)62781-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Optimal treatment for persistent asthma requires multiple classes of medication, including antiinflammatory agents and bronchodilators. Inhaled corticosteroids are the most effective antiinflammatory agents available and are recommended by recent guidelines as first-line treatment. Salmeterol, a long-acting inhaled bronchodilator, is recommended as adjunctive therapy to inhaled corticosteroids. Non-adherence to prescribed medication is prevalent and has been implicated in asthma exacerbations. Salmeterol's benefits in terms of asthma control are readily perceived by patients whereas the benefits of inhaled corticosteroid therapy may be less apparent. OBJECTIVE To evaluate whether the addition of salmeterol to a medication regimen affects patient adherence to prescription refills for inhaled corticosteroids. METHODS A retrospective medical chart and pharmacy claims record review before and after the addition of salmeterol was used. Medication adherence rates were calculated for 67 patients requiring inhaled corticosteroids for at least 8 months before and after the addition of salmeterol. RESULTS Adherence with inhaled corticosteroid therapy before (49.7% +/- 29.3%) and after (56.5% +/- 28.6%) the introduction of salmeterol was not significantly different (P = .0785, pre versus post). Adherence with salmeterol was significantly higher (58.7% +/- 28.3%) than inhaled corticosteroids at baseline (P = .0202), but not with concurrent use. Dosing frequency of inhaled corticosteroid administration was not a significant factor in adherence, but increasing age was (r = 0.41788, P = .0048). CONCLUSIONS The addition of salmeterol does not adversely affect the adherence rates to prescription refills for prescribed inhaled corticosteroid therapy. On average, important antiinflammatory treatment should not be supplanted with salmeterol if prescribed in combination.
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72
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Randolph JF, DeMarco J, Center SA, Kantrowitz L, Crawford MA, Scarlett JM, Brooks M. Prothrombin, activated partial thromboplastin, and proteins induced by vitamin K absence or antagonists clotting times in 20 hyperthyroid cats before and after methimazole treatment. J Vet Intern Med 2000; 14:56-9. [PMID: 10668818 DOI: 10.1892/0891-6640(2000)014<0056:paptap>2.3.co;2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The effect of daily doses of 5-15 mg of methimazole on the platelet count, prothrombin time (PT), activated partial thromboplastin time (APTT), and proteins induced by vitamin K absence or antagonists (PIVKA) clotting time in 20 hyperthyroid cats was determined. No significant (P > .05) difference was found in median platelet count. PT, APTT, or PIVKA clotting time before treatment compared to median values at 2-6 weeks or > or =7-12 weeks of methimazole treatment. No cat had a prolonged APTT at any time. At 2-6 weeks of methimazole treatment, 1 cat each developed thrombocytopenia or prolonged PIVKA clotting time despite initially normal values. Three cats had abnormal coagulation tests (prolonged PT [n = 1] and PIVKA clotting time [n = 3]) before treatment that fluctuated during treatment. Excluding the 3 cats that had abnormal PIVKA clotting time before treatment, prolonged PIVKA clotting time developed in 6% (1/17; 95% confidence interval, 0-28%) cats treated with methimazole for 2-6 weeks. Seemingly. doses of methimazole commonly used to treat hyperthyroidism in cats do not cause alteration in PT and APTT, and only rarely prolong PIVKA clotting time. Nevertheless, abnormal PIVKA clotting time may explain bleeding tendencies unassociated with thrombocytopenia in methimazole-treated hyperthyroid cats.
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DeMarco J, Center SA, Dykes N, Yeager AE, Kornreich B, Gschrey E, Credille KA, Guffroy M, del Piero F, Valentine BA. A syndrome resembling idiopathic noncirrhotic portal hypertension in 4 young Doberman pinschers. Vet Med (Auckl) 1998; 12:147-56. [PMID: 9595375 DOI: 10.1111/j.1939-1676.1998.tb02110.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe 4 young male Doberman Pinschers (3 littermates and 1 unrelated dog) with a syndrome resembling idiopathic or noncirrhotic portal hypertension of humans. Each dog was evaluated for a hepatopathy resulting in portal hypertension, development of portosystemic collateral vessels, and hepatic encephalopathy. These dogs differ from previous reports of young dogs with hepatic insufficiency associated with portal hypertension and acquired portal systemic shunting by their lack of intrahepatic arteriovenous fistulae, portal vein atresia, or intrahepatic fibrosis. Clinicopathologic features included erythrocyte microcytosis, normal to mildly increased liver enzyme activities, increased concentrations of serum bile acids, reduced plasma indocyanine green clearance, and normal total bilirubin concentration. Abdominal ultrasonography disclosed a small liver and portosystemic collateral vessels. Radiographic imaging studies confirmed hepatofugal portal circulation and discounted hepatic arteriovenous fistulae. Histopathologic features in liver tissue from each dog were similar and consistent in all sections examined. Common findings included increased cross-sectional views of hepatic arterioles; hepatic lobular atrophy; scanty increase in connective tissue around some large portal triads; and absence of inflammation, disturbed lobular architecture, bile duct proliferation, or intrahepatic cholestasis.
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Campbell BG, Wootton JA, Krook L, DeMarco J, Minor RR. Clinical signs and diagnosis of osteogenesis imperfecta in three dogs. J Am Vet Med Assoc 1997; 211:183-7. [PMID: 9227748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
When a young dog is evaluated for multiple fractures with minimal to no accompanying trauma, the primary differential diagnoses are metabolic disease, physical abuse, and osteogenesis imperfecta (OI). Of these, secondary hyperparathyroidism is most common, but if serum concentrations of ionized calcium, phosphorus, vitamin D, and parathormone are within reference ranges, OI must be considered. Osteogenesis imperfecta is a heritable disease characterized by brittle bones. Results of studies using cultured skin fibroblasts indicate that most cases of OI in human beings are caused by a mutation in a type-I collagen gene. Osteogenesis imperfecta was recently identified in 3 dogs. Radiographic findings included multiple fractures in various stages of healing and generalized osteopenia. Cultured fibroblasts from skin biopsy specimens were used to diagnose OI. Structural abnormalities were found in type-I collagen from each dog. This cell culture assay can be used to evaluate dogs with brittle bones.
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Sinatra ST, DeMarco J. Free radicals, oxidative stress, oxidized low density lipoprotein (LDL), and the heart: antioxidants and other strategies to limit cardiovascular damage. CONNECTICUT MEDICINE 1995; 59:579-88. [PMID: 7587173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The heart is the most susceptible of all the organs to premature aging and free radical oxidative stress. Clinical research has clearly documented the role of free radical damage and the progression of numerous degenerative diseases, particularly cardiovascular disease. This may be the result of acute ischemia-reperfusion injury, endothelial damage of hyperhomocysteinemia, as well as chronic oxidative damage secondary to lipid peroxidation. Fortunately, although highly responsive, and therefore vulnerable to the effects of oxidative stress, the heart is also receptive to the benefits of targeted phytonutrients, antioxidants, and nutritionals. The effects of antioxidant nutrients have been extensively evaluated in epidemiological, population, and clinical studies. Phytonutrients such as the natural flavonoids and carotenoids found in fresh fruits and vegetables or vitamins C, E, and beta-carotene have powerful antioxidant effects. In addition, minerals like selenium and nutrients such as coenzyme Q10 will minimize free radical risk and optimize a favorable outcome from the ubiquitous presence of oxidative stress on the cardiovascular system. The B complex, particularly folic acid, B12, and B6 are also essential in the prevention of hyperhomocysteinemia, another major risk factor for the circulatory system. Measures to minimize accumulation of heavy metals in the body, especially iron and copper, which are capable of initiating adverse free radical reactions, will also help to assuage oxidative stress. Thus, the combination of a healthy diet supplemented with antioxidants and phytonutrients may be useful in the prevention and promotion of optimum cardiovascular health.
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