Study of Phase-Dispersive X-Ray Imaging Tomomi Ohgaki and Ichita Endo (Hiroshima Univ.)

Slides:



Advertisements
Similar presentations
Giuseppe Dalba, La Fisica dei Raggi X, Dipartimento di Fisica, Università di Trento, a.a Transmission MATTER Scattering Compton Thomson Photoelectric.
Advertisements

X Rays Medical Physics Notes.
Electromagnetic Waves G5 - X Rays. Coolidge tube (X-ray tube) K = Hot filament cathode A = Tungsten anode U h = Heater Voltage (e.g. 12V) U a = Accelerating.
Focusing monochromators/analyzers Asymmetric diffraction geometry of the monochromator Dispersive double crystal monochromator Two wavelength sandwich.
Mikhail Rybin Euler School March-April 2004 Saint Petersburg State University, Ioffe Physico-Technical Institute Photonic Band Gap Structures.
Geant4 Low Energy Polarized Compton Processes Gerardo Depaola * Francesco Longo + Francesco Longo + * National University of Córdoba (Argentina) + University.
Lecture 20 X-Ray Diffraction (XRD)
CHAPTER 3: CRYSTAL STRUCTURES X-Ray Diffraction (XRD)
Internal – External Order We described symmetry of crystal habit (32 point groups) We also looked at internal ordering of atoms in 3-D structure (230 space.
X-Ray Crystallography The most important technique for mineralogy The most important technique for mineralogy Direct measurement of atomic arrangement.
PROVIDED BY EMAD BEHDAD SPECIALIZED PROTECTION AND CORROSION OF MATERIALS LECTURERS H.MONAJATI,PHD JAFARI,PHD ISLAMIC AZAD UNIVERSITY OF NAJAFABAD BARANCH.
Tomsk Polytechnic University1 A.S. Gogolev A. P. Potylitsyn A.M. Taratin.
Lecture 21 QCM and Ellipsometry
Interaction of X-rays with Matter and Imaging Gocha Khelashvili Assistant Research Professor of Physics Illinois Institute of Technology Research Physicist.
Atomic X-Ray Spectroscopy Chapter 12 X-ray range  Å to 100 Å Used  0.1Å to 25 Å.
IPCMS-GEMME, BP 43, 23 rue du Loess, Strasbourg Cedex 2
Types of Radiation Interactions All or Nothing Many Small There is a finite probability per unit length that the radiation is absorbed. If not, there is.
Properties of Multilayer Optics An Investigation of Methods of Polarization Analysis for the ICS Experiment at UCLA 8/4/04 Oliver Williams.
Optimisation of X-ray micro-tomography to perform low-dose imaging of highly-dosed gels P.M.Jenneson, E.C.Atkinson, P.Wai and S.J.Doran In 1993, Maryanski.
R.T. Jones, Newport News, Mar 21, 2002 Effects of Crystal Quality on Beam Intensity The graph at right shows how the width of a diamond’s Bragg peak affects.
CHAPTER 8 (Chapter 11 in text) Characterization of Nanomaterials.
Instrumental Chemistry Chapter 12 Atomic X-Ray Spectroscopic.
Ge 116 Module 1: Scanning Electron Microscopy
Interaction of X-rays with Matter and Imaging
Qualitative, quantitative analysis and “standardless” analysis NON DESTRUCTIVE CHEMICAL ANALYSIS Notes by: Dr Ivan Gržetić, professor University of Belgrade.
What is the nature of Part II. Last week we surmised that photons must carry momentum in spite of the fact that they are massless. Last time we learned.
X-Ray Production & Emission
4-1 Chap. 7 (Optical Instruments), Chap. 8 (Optical Atomic Spectroscopy) General design of optical instruments Sources of radiation Selection of wavelength.
Design on Target and Moderator of X- band Compact Electron Linac Neutron Source for Short Pulsed Neutrons Kazuhiro Tagi.
Advanced Biomedical Imaging Dr. Azza Helal A. Prof. of Medical Physics Faculty of Medicine Alexandria University.
5.4.1 X-Rays. (a) describe the nature of X-rays Stowmarket Physics X-rays - nature Forms of electromagnetic radiation Short wavelength High frequency.
X-ray Diffraction Outline Crystals and Bragg Diffraction
Chapter 12. Interaction of Light and Sound
Protein Structure Determination Part 2 -- X-ray Crystallography.
Electron-impact inner shell ionization cross section measurements for heavy element impurities in fusion reactors Jingjun Zhu Institute of Nuclear Science.
X-Ray Medical Imaging Physics – IB Objectives
Microwave Experiments Fred, Geoff, Lise,and Phil.
A-LEVEL PHYSICS 15/09/ :49 Medical Physics.
Chapter 12 Atomic X-Ray Spectroscopy
The Particlelike Properties of Electromagnetics Radiation Wei-Li Chen 10/27/2014.
Nuclear Instrumentation Laboratory Federal University of Rio de Janeiro -BRAZIL X-ray Fluorescence and X-ray Transmission Microtomography Imaging System.
X - RAYS IN DIAGNOSTICS D. Krilov
Last time we defined a crystal as a solid containing translational symmetry. The directions of translation can be used to from a unit cell. A primitive.
PHYS 430/603 material Laszlo Takacs UMBC Department of Physics
The Development of Laue Monochromator at X17B3 National Synchrotron Light Source in (111) diffraction intensities by severer of non-bending Si.
Assessing Single Crystal Diamond Quality
Spectrophotometry.
The physics of electron backscatter diffraction Maarten Vos AMPL, RSPHYSSE, Australian National University, Acton 0200, Canberra Aimo Winkelmann Max Planck.
Plan : lattices Characterization of thin films and bulk materials using x-ray and electron scattering V. Pierron-Bohnes IPCMS-GEMME, BP 43, 23 rue du Loess,
1 Data Acquisition What choices need to be made?.
Acousto-Optic Modulators
Wave Optics Interference and other Mysteries Explained Particle or wave?
Page 1 Phys Baski Diffraction Techniques Topic #7: Diffraction Techniques Introductory Material –Wave-like nature of electrons, diffraction/interference.
Spectrophotometer.
1 PHYS 3313 – Section 001 Lecture #15 Monday, Mar. 17, 2014 Dr. Jaehoon Yu Atomic Excitation by Electrons X-ray Scattering Bragg’s Law De Broglie Waves.
Phase Contrast sensitive Imaging
Low Angle X-ray Scattering (LAXS) for Tissue Characterization Dr M A Oghabian.
Physics 1202: Lecture 28 Today’s Agenda Announcements: –Midterm 2: solutions HW 8 this FridayHW 8 this Friday Diffraction –Review Polarization –Reflection.
Texture analysis of geological materials experimentally deformed at high p and T Florian Heidelbach Bayerisches Geoinstitut University of Bayreuth Texture.
Neutron exposure at CERN Mitsu KIMURA 19 th July 2013.
Based on a paper which will appear on Med. Phys. Issue of Dec. 05 Introduction Contrast cancellation algorithm Experimental setup Experimental images:
Considerations on the possibility of Phase Contrast Mammography using ICS sources B. Golosio a, P. Delogu b, I. Zanette b, M. Carpinelli a, G. L. Masala.
THE X-RAY DIFFRACTOMETER AND OTHER XRD INSTRUMENTATION Precession Camera.
Barium & Iodine Imaging Physics
What is the nature of Light ? Part II.
Theoretical consideration for x-ray phase contrast mammography
Learning Objectives By the end this lesson you should…
Instrument Parameters in WDXRF
X-Rays.
Bragg Diffraction 2dsinq = nl Bragg Equation
Presentation transcript:

Study of Phase-Dispersive X-Ray Imaging Tomomi Ohgaki and Ichita Endo (Hiroshima Univ.)

Plane wave passing through the object X-Ray Imaging Equipments Absorption Contrast Method ( Usual ) Phase Contrast Method For Medical application Early diagnoses of breast cancer Imaging for living soft tissues Study of Phase-Dispersive X-Ray Imaging

Cross Section of X-Ray Absorption and Phase Shift Phase Contrast Phase shift of light elements 1000 times higher than absorption Radiation dose by phase contrast imaging can be reduced. Phase Shift Atomic Number Cross Section (cm 2 ) X-ray Energy 8.3 keV 13.5keV 24.8keV 62.0keV Absorption

Setup for X-Ray Phase-Dispersive Measurements X-Ray Tube Characteristic X-Ray 60 ~ 70 keV Target W,Re,Au Monochrometor Silicon single crystal Asymmetric Bragg Diffraction Crystal Analyzer Silicon single crystal Higher order diffraction Maximum contrast by rotating Crystal analyzer X-Ray Detectors Imaging plate several 10  m Emulsion several  m X-Ray CCD several 10  m Transmission, Reflection X-Ray measurements

Reflection and Transmission Intensities W K  -Line (59.3keV) Crystal analyzer Si(422) thickness 560  m Rotating crystal analyzer  rotation angle No object case

Transmission Intensity W K  -Line (59.3keV) Crystal analyzer Si(422) thickness 560  m Object (Prism, base 2mm, base angle 45degree) d  dx

W K  -Line (59.3keV) Crystal analyzer Si(422) thickness 560  m Object (Prism, base 2mm, base angle 45degree) Reflection Intensity

Reflection and Transmission Intensities W K  -Line (59.3keV) Crystal analyzer Si(422) thickness 560  m Object (Prism, base 2mm, base angle 45degree)  x   rad (  =-0.70)

Arteries of mouse (V.N.Ingal et al.,1998 ) Veins of leaf (S.Wilkins et al., 1998) Samples of Phase Contrast Method

Medical application, Electronics, Aerospace, Food industries Medical diagnoses … breast cancer, malignant tumors Search for impurity objects in Foods Study of Biology Search of oil …fluid mechanics Investigation of object of art or craft object Investigation of new materials like ceramics or fiber Approach to Venture Business

Simulation by Dynamical Diffraction Theory Crystal surface Disagreement between analytical formulas and experimental results where d  /dx is large changeable. X -Ray Solve Takagi-Taupin equations using Simulation. Reflection X-Ray Transmission X-Ray

Simulation code CPRI X-ray tube or SOR light : Target size, current, voltage Slit : Transfer matrix Monochromator : Asymmetric Bragg diffraction Object : Linear absorption coefficient, refractive index Crystal analyzer : Takagi-Taupin eqs. Detector : Detection area, Detection efficiency Purpose : Calculate Phase Radiological Imaging

Intensity of one photon incidence Crystal surface Si Crystal Crystal surface Incident X-Ray

Intensities by Simulation

Prototype experiments

Prototype Products

X-Ray Tube 22.5mA 55kV Target Mo

Imaging plate

Imaging Plate Reader Rigaku R-AXIS-D53

Prototype experiments Asymmetric Bragg Diffraction Ge crystal (115)       b= Laue case Ge crystal(220) thickness200  m    Mo K  1 -line  w= keV Polypropylene  =0.95g/cm 3

Rocking curve from crystal analyzer Laue case  =295  rad  =329  rad Ge (220)  =27.4  rad  x =820  rad  y =13mrad

Transmission Image of Polypropylene   =+160  rad   =-160  rad    0  rad

Rocking curve from crystal analyzer Bragg case  =235  rad Si (220)  =10.9  rad

Reflection Image of Polypropylene    0  rad

We have done the prototype experiments for PDI. We have made the simulation code for PDI. Now Hiroshima group will study PDI with Betatron. 「位相コントラスト X 線撮像装置」大垣智巳、遠藤一太、特願 (July 11, 2001) "Simulation code for phase radiological imaging using dynamical theory” T.Ohgaki and I.Endo Summary

REFER Hiroshima Univ. got RF cavity Beam life time is 4min.