نتایج جستجو برای: heterogeneous phantom

تعداد نتایج: 142666  

2014
C. Herzberg R. A. Cabral M. G. Jackson C. Vidito E. H. Hauri

a Department of Earth and Planetary Sciences, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854-8066, USA b Boston University, Department of Earth and Environment, Boston, MA 02215, USA c UC Santa Barbara, Department of Earth Science, Santa Barbara, CA 93106, USA d Geosciences Research Division, Scripps Institution of Oceanography, La Jolla, CA 92093-0244, USA e Department of Terrestria...

2015
Susanne Ziegler Bjoern W. Jakoby Harald Braun Daniel H. Paulus Harald H. Quick

BACKGROUND In integrated PET/MR hybrid imaging the evaluation of PET performance characteristics according to the NEMA standard NU 2-2007 is challenging because of incomplete MR-based attenuation correction (AC) for phantom imaging. In this study, a strategy for CT-based AC of the NEMA image quality (IQ) phantom is assessed. The method is systematically evaluated in NEMA IQ phantom measurements...

Journal: :British journal of anaesthesia 1997
S W Wartan W Hamann J R Wedley I McColl

Using a mail-delivered questionnaire, we surveyed 590 veteran amputees concerning phantom pain, phantom sensation and stump pain. They were selected randomly from a population of 2974 veterans with long-standing limb amputation(s) using a computer random number generator. Eighty-nine percent responded and of these, 55% reported phantom limb pain and 56% stump pain. There was a strong correlatio...

Journal: :Japanese Journal of Radiological Technology 1991

Journal: :journal of lasers in medical sciences 0
mohsen erfanzadeh laser and plasma research institute, shahid beheshti university.g.c., tehran, iran. saied alikhani laser and plasma research institute, shahid beheshti university.g.c., tehran, iran. mohammad ali ansari laser and plasma research institute, shahid beheshti university.g.c., tehran, iran. ezeddin mohajerani laser and plasma research institute, shahid beheshti university.g.c., tehran, iran.

introduction: in this study, arrangement of a low-cost optical tomography device compared to other methods such as frequency domain diffuse tomography or time domain diffuse tomography is reported. this low-cost diffuse optical imaging technique is based on the detection of light after propagation in tissue. these detected signals are applied to predict the location of in-homogeneities inside p...

Journal: :iranian journal of medical physics 0
mohammad taghi bahreyni toossi professor, medical physics research center, faculty of medicine, mashhad university of medical sciences, mashhad, iran eftekhar rajab bolokat m.sc., in medical physics, mashhad university of medical sciences, mashhad, iran raham salek m.sc., in medical engineering, medical physics research center, faculty of medicine, mashhad university of medical sciences, mashhad, iran shahram baiani associate professor, radiation oncology dept., omid hospital, mashhad university of medical sciences, mashhad, iran hamid gholamhoseinian ph.d., student, medical physics dept., faculty of medicine, mashhad university of medical sciences, mashhad, iran mohsen layegh m.sc., in medical physics, omid hospital, mashhad university of medical sciences, mashhad, iran.

introduction: nasopharyngeal carcinoma is one of the most common malignancies in the head and neck region and radiotherapy is its treatment of choice. in spite of the fact that it is widely used, due to the presence of many sensitive organs or tissues in this region, patients may suffer from a wide range of side effects. one such sensitive tissue is the spinal cord. if the absorbed dose to spin...

Journal: :Journal of Neurology, Neurosurgery & Psychiatry 1948

Journal: :Annals of the ICRP 2020

1998
J. DANIEL CHRISTENSEN MARK HOVEY

In the first part, we determine conditions on spectra X and Y under which either every map from X to Y is phantom, or no nonzero maps are. We also address the question of whether such all or nothing behaviour is preserved when X is replaced with V ∧ X for V finite. In the second part, we introduce chromatic phantom maps. A map is n-phantom if it is null when restricted to finite spectra of type...

Journal: :Journal of neurology, neurosurgery, and psychiatry 2000
L H Lu A M Barrett J E Cibula R L Gilmore E B Fennell K M Heilman

OBJECTIVE Patients who misperceive that they are moving their paralysed arm (phantom movements) may not recognise its weakness. Therefore, the relation between phantom limb movements and anosognosia for hemiplegia during selective right hemispheric anaesthesia (the Wada test) was examined. METHODS Nine patients with intractable epilepsy underwent the Wada test. During the right hemispheric in...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید