51
|
Azimi M, Jouybari L, Moghadam S, Ghaemi E, Behnampoor N, Sanagoo A, Hesam M. Antimicrobial effects of chlorhexidine, matrica drop mouthwash (chamomile extract), and normal saline on hospitalized patients with endotracheal tubes. Iran J Nurs Midwifery Res 2016; 21:458-463. [PMID: 27904627 PMCID: PMC5114788 DOI: 10.4103/1735-9066.193390] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Background: The functions and use of mouthwashes are variable depending on their type. Oral care in patients with endotracheal tubes is important to prevent side effects such as pneumonia. The aim of this study was to determine the antimicrobial effects of chlorhexidine, drop of Matrica mouthwash (chamomile extract), and normal saline on hospitalized patients with endotracheal tube in an intensive care unit (ICU). Materials and Methods: In this clinical trial, 39 patients admitted to the ICU were selected by convenience sampling, were matched based on age and sex, and randomly assigned to three groups (chlorhexidine, Matrica, saline). Mouth washing was performed every 8 to 48 hours. The samples were taken at time zero (before the intervention) and 48 hours after the intervention for bacterial culture. Antibacterial activity of each mouthwash on microorganisms was measured based on the growth of Staphylococcus aureus, Pneumococcal, Enterococcus, Pseudomonas, and Escherichia coli. The obtained data were then analyzed using Chi-square and Fisher's exact tests with the Statistical Package for the Social Sciences Package version 18. Results: Chlorhexidine mouthwash was more effective in preventing colonization of bacteria in the mouth (point probability = 0.06) in comparison with chamomile and saline mouthwashes. Nevertheless, none of the tested mouthwashes were able to remove pathogens, including Staphylococcus aureus, Pseudomonas, Klebsiella, and Acinetobacter. Conclusions: 0.2% chlorhexidine mouthwash has a significant effect on the bacterial colonization rate in comparison with Matrica and normal saline mouthwashes in ICU hospitalized patients with endotracheal tube.
Collapse
Affiliation(s)
- Maryam Azimi
- Department of Nursing, School of Nursing and Midwifery, Golestan University of Medical Sciences, Gorgan, Iran
| | - Leila Jouybari
- Nursing Research Centre, Golestan University of Medical Sciences, Gorgan, Iran
| | - Shahram Moghadam
- Department of Anesthesiology, School of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ezatolah Ghaemi
- Department of Microbiology, Golestan University of Medical Sciences, Gorgan, Iran
| | - Naser Behnampoor
- Department of Biostatistics, Faculty of Health, Golestan University of Medical Sciences, Gorgan, Iran
| | - Akram Sanagoo
- Nursing Research Centre, Golestan University of Medical Sciences, Gorgan, Iran
| | - Moslem Hesam
- Department of Nursing, School of Nursing and Midwifery, Golestan University of Medical Sciences, Gorgan, Iran
| |
Collapse
|
52
|
Azimi M, Nafissi-Varcheh N, Faramarzi MA, Aboofazeli R. Laccase Activity in CTAB-Based Water-in-Oil Microemulsions. Iran J Pharm Res 2016; 15:441-452. [PMID: 27980579 PMCID: PMC5149031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The aim of this study was to develop a microemulsion system as a medium for laccase-catalyzed reactions. Phase behavior studies were conducted by constructing partial pseudo-ternary phase diagrams for systems comprising of cetyltrimethylammonium bromide (CTAB), various organic solvents as the oil phase (i.e., hexane, cyclohexane, heptane, octane, isooctane, toluene, isopropyl myristate), two co-surfactants (i.e., 1-butanol and 1-hexanol) and citrate buffer solution, at various surfactant/co-surfactant weight ratios (Rsm). A monophasic, transparent, non-birefringent area (designated as microemulsion domain) was seen to occur in some phase diagrams along the surfactant/organic solvent axis, the extent of which was dependent mainly upon the nature of co-surfactant and Rsm. On each phase diagram, three different water-in-oil (w/o) microemulsion systems with less than 50 wt% surfactant mixture and less than 20 wt% of aqueous phase were selected for laccase loading and activity measurements. Results revealed that the catalytic activity of laccase in CTAB-based w/o microemulsions decreased considerably, compared with its activity in the buffer solution, the extent of which depended upon the type of component and their compositions in the microemulsions. It was suggested that the conformational changes due to the electrostatic interactions between the cationic head group of CTAB and the negative enzyme might be the reason for the reduction of laccase activity, once entrapped in the microemulsion.
Collapse
Affiliation(s)
- Maryam Azimi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, 19919-53381, Iran.
| | - Nastaran Nafissi-Varcheh
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, 19919-53381, Iran.
| | - Mohammad Ali Faramarzi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy & Biotechnology Research Center, Tehran University of Medical Sciences, Tehran 14176-14411, Iran.
| | - Reza Aboofazeli
- Department of Pharmaceutics, School of Pharmacy & Protein Technology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, 19919-53381, Iran.,Corresponding author: E-mail:
| |
Collapse
|
53
|
Abstract
Because of its predominance, the main immunomodulatory function of IVIg is carried out by the IgG molecules; while, based on multiple studies, the immunomodulatory role of other soluble molecules in commercial IVIg products is impossible to ignore. Although the existence of these molecules and their suppressive effects on the immune response may be considered a positive contribution to the treatment of autoimmune disorders, their presence, half-life, accumulation and immunosuppressive actions in immunocompromised patients should be monitored by physicians and manufacturing companies.
Collapse
Affiliation(s)
- Maryam Azimi
- a Department of Immunology, School of Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Asghar Aghamohammadi
- b Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center , Tehran University of Medical Sciences , Tehran , Iran
| | - Hans D Ochs
- c Department of Pediatrics , University of Washington and Seattle Children's Hospital Research Institute , Seattle , WA , USA
| | - Nima Rezaei
- a Department of Immunology, School of Medicine , Tehran University of Medical Sciences , Tehran , Iran.,b Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center , Tehran University of Medical Sciences , Tehran , Iran.,d Universal Scientific Education and Research Network (USERN) , Tehran , Iran
| |
Collapse
|
54
|
Golshahi L, Longest PW, Azimi M, Syed A, Hindle M. Intermittent Aerosol Delivery to the Lungs During High-Flow Nasal Cannula Therapy. Respir Care 2014; 59:1476-86. [DOI: 10.4187/respcare.02903] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
55
|
Azimi M, Heshmati G, Farahpour M, Faramarzi M, Abbaspour K. Modeling the impact of rangeland management on forage production of sagebrush species in arid and semi-arid regions of Iran. Ecol Modell 2013. [DOI: 10.1016/j.ecolmodel.2012.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
56
|
Azimi M, Kamrani A, Smadi H. Statistics-Based Prediction Analysis for Head and Neck Cancer Tumor Deformation. Journal of Healthcare Engineering 2012. [DOI: 10.1260/2040-2295.3.4.571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
57
|
Kanathezhath B, Hazard FK, Guo H, Kidd J, Azimi M, Kuypers FA, Vichinsky EP, Lal A. Hemoglobin Hakkari: an autosomal dominant form of beta thalassemia with inclusion bodies arising from de novo mutation in exon 2 of beta globin gene. Pediatr Blood Cancer 2010; 54:332-5. [PMID: 19852066 DOI: 10.1002/pbc.22167] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Certain beta globin gene mutations produce a thalassemia major phenotype in the heterozygous state. While most such patients have thalassemia intermedia, we describe a young Guatemalan child with a de novo mutation in the beta globin gene, codon 31 T --> G (Hemoglobin Hakkari), who developed severe anemia at the age of 10 months and remains transfusion-dependent. The substitution of B13 leucine with arginine in the beta globin results in alteration of a critical heme contact point resulting in an extremely unstable variant hemoglobin and a clinical picture that is characterized by ineffective erythropoiesis and numerous intracytoplasmic inclusions within the erythrocyte precursors of the bone marrow. .
Collapse
Affiliation(s)
- B Kanathezhath
- Children's Hospital and Research Center Oakland, Oakland, California 94609, USA.
| | | | | | | | | | | | | | | |
Collapse
|
58
|
Kidd JL, Azimi M, Lubin B, Vichinsky E, Hoppe C. Application of an expanded multiplex genotyping assay for the simultaneous detection of Hemoglobin Constant Spring and common deletional alpha-thalassemia mutations. Int J Lab Hematol 2009; 32:373-80. [PMID: 19919622 DOI: 10.1111/j.1751-553x.2009.01197.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Hemoglobin Constant Spring (HbCS) is the most common nondeletional alpha-thalassemia variant causing HbH disease, making its detection crucial in populations at risk. Universal newborn screening for HbH is carried out in California. Identification of alpha-thalassemia genotypes responsible for HbH and HbH-CS requires rapid, accurate and cost-effective genotyping methods suitable for population screening. We incorporated the HbCS mutation into our existing seven-plex genotyping assay for common alpha-thalassemia deletions. To assess the feasibility and diagnostic utility of this expanded multiplex gap-PCR assay, we determined genotypic frequencies of HbCS in samples referred for alpha-thalassemia testing between 1 January 2006 and 31 December 2008. During the 3-year study period, 1436 samples were genotyped for alpha-thalassemia. HbH-CS accounted for 23 (13%) of the 176 cases of HbH disease identified. In a subset of 145 newborns referred by the California NBS program with an elevated Hb Bart's level at birth, HbH disease was confirmed in 134 (93%) and HbH-CS identified in 13 (10%) of these. This expanded genotyping assay has proven to be a rapid, reliable and clinically useful diagnostic tool for the detection of HbH-CS disease.
Collapse
Affiliation(s)
- J L Kidd
- Hemoglobinopathy Reference Laboratory, Children's Hospital & Research Center Oakland, 747 52nd Street, Oakland, CA 94609, USA
| | | | | | | | | |
Collapse
|
59
|
Azimi M, Pourmirza A, Safaraliza M, Mohitazar G. Studies on the Lethal Effects of Spinosad on Adults of Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae) with Two Bioassay Methods. ACTA ACUST UNITED AC 2008. [DOI: 10.3923/ajbs.2009.1.6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
60
|
Abstract
The hemoglobinopathies represent a genetically heterogeneous group of disorders. Clinically important hemoglobin variants have been increasingly reported in the USA. Consequently, rapid and accurate testing methods are needed to address the growing diagnostic challenges of identifying these variants. To evaluate the utility of the Luminex LabMAP system for hemoglobinopathy testing, we adapted single base primer extension (SBPE) to this platform to detect 11 clinically important hemoglobin variants. Clinical samples from 11 individuals were tested for five beta-globin mutations (C-Harlem, D-Iran, Fannin-Lubbock and Hope) and six alpha-globin mutations (J-Toronto, Hasharon, G-Philadelphia, G-Norfolk, Constant-Spring and Quong-Sze). Two separate multiplexed SBPE assays were developed. Biotinylated amplification products were hybridized to fluorescent microspheres tagged with allele-specific capture probes and analyzed by flow cytometry on the Luminex100 instrument. The median fluorescent intensity (MFI) ranged from 1255 to 7478 fluorescence units (FU) and from 282 to 2609 FU above background for all positive beta-globin and alpha-globin alleles, respectively. Using the highest background MFI + 3 SD as a conservative threshold, MFI values uniformly discriminated wild type from mutant alleles, and genotypes were correctly identified in all samples tested. This pilot study demonstrates the potential application of the Luminex LabMAP genotyping platform to newborn screening for definitive hemoglobinopathy testing.
Collapse
Affiliation(s)
- S Aslanian
- Hemoglobinopathy Reference Laboratory, Children's Hospital Oakland Research Institute, Oakland, CA 94609, USA
| | | | | | | |
Collapse
|
61
|
|
62
|
Mahboudi F, Abolhassani M, Tehrani SR, Azimi M, Asmar M. Differentiation of old and new world leishmania species at complex and species levels by PCR. Scand J Infect Dis 2003; 34:756-8. [PMID: 12477327 DOI: 10.1080/0036554021000026930] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The variable and conserved sequence boxes of kinetoplast DNA (kDNA) of 11 standard strains of 6 complexes of New and Old World Leishmania were amplified using PCR. Four strains from 2 complexes of Old World Leishmania - L. major (MRHO/IR/64/Nadim-1), with 2 bands at 850 and 620 bp, L. major (MHOM/SU/73/5-ASKH), with a band at 620 bp, L. donovani, with a band at 800 bp and L. infantum, with a band at 650 bp - could be differentiated from each other and from the New World strains, with the exception of L. infantum. Seven Leishmania strains from 4 complexes of New World Leishmania - L. mexicana and L. pifanoi, with a band at 730 bp, L. guyanensis, with 2 bands at 730 and 650 bp, L. peruviana, with a band at 710 bp and L. amazonensis, L. garnhami and L. braziliensis, each with a band at 650 bp - were identified. Of these strains, L. guyanensis and L. peruviana could be differentiated from each other and from the Old World strains. These results show that using PCR amplification of kDNA we could differentiate between New and Old World Leishmania at both complex and strain levels. The amplified kDNA PCR products, together with other techniques, could be useful as a diagnostic tool for the identification of Leishmania species.
Collapse
|
63
|
|
64
|
Lorey F, Cunningham G, Vichinsky EP, Lubin BH, Witkowska HE, Matsunaga A, Azimi M, Sherwin J, Eastman J, Farina F, Waye JS, Chui DH. Universal newborn screening for Hb H disease in California. Genet Test 2002; 5:93-100. [PMID: 11551109 DOI: 10.1089/109065701753145538] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Newborn screening is an accepted public health measure to ensure that appropriate health care is provided in a timely manner to infants with hereditary/metabolic disorders. Alpha-thalassemia is a common hemoglobin (Hb) disorder, and causes Hb H (beta4) disease, and usually fatal homozygous alpha(0)-thalassemia, also known as Hb Bart's (gamma4) hydrops fetalis syndrome. In 1996, the State of California began to investigate the feasibility of universal newborn screening for Hb H disease. Initial screening was done on blood samples obtained by heel pricks from newborns, and stored as dried blood spots on filter paper. Hb Bart's levels were measured as fast-moving Hb by automated high-performance liquid chromatography (HPLC) identical to that currently used in newborn screening for sickle cell disease. Subsequent confirmation of Hb H disease was done by DNA-based diagnostics for alpha-globin genotyping. A criterion of 25% or more Hb Bart's as determined by HPLC detects most, if not all cases of Hb H disease, and few cases of alpha-thalassemia trait. From January, 1998, through June, 2000, 89 newborns were found to have Hb H disease. The overall prevalence for Hb H disease among all newborns in California is approximately 1 per 15,000. Implementation of this program to existing newborn hemoglobinopathy screening in populations with significant proportions of southeast Asians is recommended. The correct diagnosis would allow affected infants to be properly cared for, and would also raise awareness for the prevention of homozygous alpha(0)-thalassemia or Hb Bart's hydrops fetalis syndrome.
Collapse
Affiliation(s)
- F Lorey
- Genetic Disease Branch, California Department of Health Services, Berkeley 94704, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
65
|
|
66
|
Abstract
BACKGROUND Molecules that are highly expressed by human prostate cancers may serve as therapeutically relevant targets or tumor markers. Tyrosine kinases are frequently overexpressed in metastatic tumor cells and this prompted us to screen for tyrosine kinases that are overexpressed in prostate cancer cells. METHODS Expression levels of the EphA2 receptor tyrosine kinase were determined by Western blot analysis in canine and human prostate cancer cell lines and in immortalized and transformed variants of 267B1 prostatic epithelial cells. EphA2 levels in benign human prostate and prostate cancers were also determined in formalin-fixed, paraffin-embedded tissues using immunohistochemical staining. RESULTS Metastatic prostate cancer cells overexpressed EphA2 by 10-100 fold as compared with non-invasive prostatic epithelial cells. EphA2 immunoreactivity in vivo was also significantly greater in human prostate cancers as compared with benign prostate epithelium. CONCLUSIONS The EphA2 receptor tyrosine kinase is differentially expressed in human and canine prostate cancer cell lines and overexpressed in human prostate cancers as compared with benign prostate tissues. Metastasis-derived canine prostate carcinoma cell lines overexpress EphA2 and may provide pre-clinical models to further evaluate the role of EphA2 in prostate carcinogenesis. Further investigations are needed to determine the utility of EphA2 as a tumor marker and a novel target in human prostate cancer.
Collapse
Affiliation(s)
- J Walker-Daniels
- Department of Basic Medical Sciences, Purdue University, West Lafayette, Indiana 47907-1246, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
67
|
Zantek ND, Azimi M, Fedor-Chaiken M, Wang B, Brackenbury R, Kinch MS. E-cadherin regulates the function of the EphA2 receptor tyrosine kinase. Cell Growth Differ 1999; 10:629-38. [PMID: 10511313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
EphA2 is a member of the Eph family of receptor tyrosine kinases, which are increasingly understood to play critical roles in disease and development. We report here the regulation of EphA2 by E-cadherin. In nonneoplastic epithelia, EphA2 was tyrosine-phosphorylated and localized to sites of cell-cell contact. These properties required the proper expression and functioning of E-cadherin. In breast cancer cells that lack E-cadherin, the phosphotyrosine content of EphA2 was decreased, and EphA2 was redistributed into membrane ruffles. Expression of E-cadherin in metastatic cells restored a more normal pattern of EphA2 phosphorylation and localization. Activation of EphA2, either by E-cadherin expression or antibody-mediated aggregation, decreased cell-extracellular matrix adhesion and cell growth. Altogether, this demonstrates that EphA2 function is dependent on E-cadherin and suggests that loss of E-cadherin function may alter neoplastic cell growth and adhesion via effects on EphA2.
Collapse
Affiliation(s)
- N D Zantek
- Department of Basic Medical Sciences and Purdue Cancer Center, Purdue University, West Lafayette, Indiana 47907, USA
| | | | | | | | | | | |
Collapse
|
68
|
Shafiee A, Dehpour AR, Hadizadeh F, Azimi M. Syntheses and calcium channel antagonist activity of nifedipine analogues with methylsulfonylimidazolyl substituent. Pharm Acta Helv 1998; 73:75-9. [PMID: 9700935 DOI: 10.1016/s0031-6865(98)00004-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Various diester analogues of nifedipine in which the ortho nitrophenyl group at position 4 is replaced by 1-methyl-2-methylsulfonyl-5-imidazolyl substituent, were synthesized and evaluated as calcium channel antagonists on guinea-pig ileal smooth muscle. Nifedipine was used as a standard. Compound 6n was found to be the most active.
Collapse
Affiliation(s)
- A Shafiee
- Department of Chemistry, Faculty of Pharmacy, Medical Sciences University of Tehran, Iran
| | | | | | | |
Collapse
|
69
|
Alamowitch C, Azimi M, Lytras A, Roussel JP. [Apropos of a large right diaphragmatic hernia]. J Chir (Paris) 1992; 129:564-5. [PMID: 1299673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
70
|
Azimi M, Adipepe F, Haykal S, Alamowitch C. [Recurrent pneumothorax after osteosynthesis of the clavicle. Apropos of a case]. J Chir (Paris) 1990; 127:365. [PMID: 2211897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
71
|
Alamowitch C, Azimi M, Parmentier P, Randria V. [Apropos of an acute pseudo-tumoral epiploitis]. J Chir (Paris) 1989; 126:473-4. [PMID: 2808563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
72
|
Abstract
In this paper, we have first presented a new computational procedure for the calculation of the "true" forward scattered fields of a multicomponent object. By "true" we mean fields that are not limited by the first-order approximations, such as those used in the first-order Born and Rytov calculations. Although the results shown will only include the second-order fields for a multicomponent object, the computational procedure can easily be generalized for higher order scattering effects. Using this procedure we have shown by computer simulation that even when each component of a two-component object is weakly scattering, the multiple scattering effects become important when the components are blocking each other. We have further shown that when strongly scattering components that are large compared to a wavelength are not blocking each other, the scattering effects can be ignored. Both these conclusions agree with intuitive reasoning. Since all the currently available diffraction tomography algorithms are based on the assumption that the object satisfies the first-order scattering assumption, it is interesting to test them under conditions when this assumption is violated. We have used the scattered fields obtained with the new computational procedure to test these algorithms, and shown the resulting artifacts. Our main conclusion drawn from this computer simulation study is that even when object inhomogeneities are as small as 5 percent of the background, multiple scattering can introduce severe distortions in multicomponent objects.
Collapse
|
73
|
Kulski M, Rojas-Miranda A, Levasseur P, Azimi M, Hummel J, Le Brigand H, Merlier M. [Spontaneous hemothorax. Etiological, clinical and therapeutic problems (13 cases)]. Ann Chir Thorac Cardiovasc 1971; 10:361-6. [PMID: 5128143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
74
|
Sulzer J, Azimi M, Rojas-Miranda A, Levasseur P, Le Brigand H, Merlier M. [40 cases of bronchogenic cysts of the mediastinum. Topographic considerations]. Ann Chir Thorac Cardiovasc 1970; 9:261-5. [PMID: 5487852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
75
|
Merlier M, Le Brigand H, Wapler C, Miranda A, Azimi M. [74 diving and thoracic goiters]. Ann Chir Thorac Cardiovasc 1969; 8:169-72. [PMID: 5356962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|