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courses:446:2013:446-2013-4:metal_artifact_removal_in_c-arm_cone-beam_ct [2013/04/01 23:02]
ccaymar1@johnshopkins.edu [Other Resources and Project Files]
courses:446:2013:446-2013-4:metal_artifact_removal_in_c-arm_cone-beam_ct [2013/05/08 21:12] (current)
ccaymar1@johnshopkins.edu [Metal Artifact Removal in C-Arm Cone Beam CT]
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 ======Metal Artifact Removal in C-Arm Cone Beam CT====== ======Metal Artifact Removal in C-Arm Cone Beam CT======
-Last checked: 04/01/13, 10:00 pm+Last checked: 05/08/13, 10:00 pm
  
 ======Summary====== ======Summary======
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   * **Phantom Construction**    * **Phantom Construction** 
-    - Minimum: containing metal sphere and contrast vasculature ---------------------> 2/10-2/23 +    - Minimum: containing metal sphere and contrast vasculature  
-    - Expected: containing coils and/or clips and contrast vasculature --------------> 3/22-3/30 +    - Expected: one containing stent, coils and contrast vasculature. One phantom containing surgical clips and contrast vasculature (Original plan: containing coils and/or clips and contrast vasculature 
-    - Maximum: containing ONYX and contrast vasculature -----------------------------> 4/14-4/20+    - Maximum: containing ONYX and contrast vasculature 
  
   * **Image Acquisition**    * **Image Acquisition** 
-    - Minimum: workbench (flat panel, cone-beam CT in lab) -------> 2/24-3/9, 4/1-4/7, 4/21-4/27 +    - Minimum: workbenchflat panel, cone-beam CT in lab.   
-    - Expected: Zeego (C-arm, cone-beam, Siemens CT system) ------> 4/1-4/7, 3/3-3/23, 4/21-5/11  +    - Expected: Zeego (C-arm, cone-beam, Siemens CT system)  
-    - Maximum: construct converter to transfer data from bench to Zeego workstation -> 5/12+    - Maximum: none (Original plan: construct converter to transfer data from bench to Zeego workstation
  
   * **MAR Algorithm**    * **MAR Algorithm** 
     - Minimum: run and implement algorithm     - Minimum: run and implement algorithm
-    - Expected: adapt and extend for performance improvement +    - Expected: adapt for performance improvement 
-    - Maximum: suggest and implement algorithm improvement+    - Maximum: suggest algorithm improvement (Original plan: extend and apply improvements)
    
   * **Data Analysis: Image Quality**    * **Data Analysis: Image Quality** 
     - Minimum: quantitatively measure contrast resolution (CNR)     - Minimum: quantitatively measure contrast resolution (CNR)
-    - Expected: measure spatial resolution, artifact magnitude  +    - Expected: noise standard deviation (Original plan: measure spatial resolution, artifact magnitude 
-    - Maximum: other measurable parameters +    - Maximum: artifact magnitude 
  
   * **Data Analysis: Segmentation Accuracy**    * **Data Analysis: Segmentation Accuracy** 
     - Minimum: application of segmentation algorithm on image data     - Minimum: application of segmentation algorithm on image data
     - Expected: quantitatively measure segmentation accuracy      - Expected: quantitatively measure segmentation accuracy 
-    - Maximum: segmentation algorithm improvement and suggestions +    - Maximum: segmentation algorithm improvement suggestions 
 ======Technical Approach====== ======Technical Approach======
  
-The project is comprised of three stages: each will consist of the construction of a brain phantom, acquisition of phantom images and the assessment and analysis of image quality and MAR algorithm data. Below are quantitative and/or measurable variables and parameters. +The project is comprised of four (Original plan: threestages: each will consist of the construction of a brain phantom, acquisition of phantom images and the assessment and analysis of image quality and MAR algorithm data. Below are quantitative and/or measurable variables and parameters. 
  
 === Phantom Construction === === Phantom Construction ===
   * **Dependent variables in metal fillings**    * **Dependent variables in metal fillings** 
-    - diameter, volumesphericity, density, proximity to simulated vasculature structures, number and shape of coils and clips+    - for spheres and clips: quantity, diameter, materiallocation in relation to contrast vasculature and anatomy 
 +    - for clips and stents: quantity, material, diameter, length 
  
   * **Dependent variables in simulated vasculature**   * **Dependent variables in simulated vasculature**
     - number of vessels, contrast, volume, length, shape, material (silicon, brain-equivalent jello, among others), location in the brain representative of various anatomical structures including berry aneurysms, taking into consideration areas of the brain where aneurysms are most commonly found.     - number of vessels, contrast, volume, length, shape, material (silicon, brain-equivalent jello, among others), location in the brain representative of various anatomical structures including berry aneurysms, taking into consideration areas of the brain where aneurysms are most commonly found.
  
-Manipulation of these variables will produce wanted measurable parameters (such as attenuation and contrast). Further investigation will be done to find the most efficient and effective way to construct these phantoms. +Manipulation of these variables will produce wanted measurable parameters (such as attenuation and contrast). 
 === Image Acquisition === === Image Acquisition ===
-  * **Dependent variables in both systems**  +  * **Dependent variables in imaging systems**  
-    - Energy of beam (kVp), number of projections, dose, tube current, z-coverage (FOV) +    - Energy of beam (kVp), number of projections, z-coverage (FOV)
- +
-The Zeego/Axiom Artis Zee offers additional dependent variables (such as angulated-source detector orbits and acquisition modes). Further investigation will be done to acquire an extensive list of dependent and measurable parameters and their effects on image acquisition.+
  
 +All scans were performed on a C-arm Cone-Beam Axiom Artis Zee (Axiom Artis Zeego, Siemens Medical Solutions, Elangen, Germany) with a standard DynaCT Head 20s 70keV acquisition. 
  
 === Data Analysis === === Data Analysis ===
   * **Image quality**    * **Image quality** 
-    - Measurable parameters: Contrast resolution, Signal-to-noise ratio, Spatial resolution +    - Measurable parameters: Contrast resolution (CNR), resolution, noise std 
-    - Artifact magnitude: we will develop a parameter that will quantify the degradation of the background and surrounding structures caused by the presence of a metal artifact.+    - Artifact magnitude with selected ROI (region of interest)
  
   * **Segmentation accuracy**   * **Segmentation accuracy**
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   - Milestone name:  Construction of first-stage Phantom [metal sphere]   - Milestone name:  Construction of first-stage Phantom [metal sphere]
-    * Planned Date: 2/17-2/23 
     * Expected Date: 3/2     * Expected Date: 3/2
     * Status: completed      * Status: completed 
-  - Milestone name:  First-stage image acquisition in experimental bench 
-    * Planned Date: 2/24-3/2 
-    * Expected Date: 3/9 
-    * Status: completed 
   - Milestone name:  First-stage image acquisition in Zeego   - Milestone name:  First-stage image acquisition in Zeego
-    * Planned Date: 3/3-3/9 
     * Expected Date: 3/23     * Expected Date: 3/23
     * Status: completed     * Status: completed
-  - Milestone name:  Construction of second-stage Phantom [coil and/or clip] +  - Milestone name:  Construction of second-stage Phantom [stent and coils]
-    * Planned Date: 3/24-3/30+
     * Expected Date: 3/30     * Expected Date: 3/30
-    * Status: incomplete +    * Status: completed
-  - Milestone name:  Second-stage image acquisition in experimental bench +
-    * Planned Date: 4/1-4/6 +
-    * Expected Date: 4/13 +
-    * Status: incomplete+
   - Milestone name:  Second-stage image acquisition in Zeego   - Milestone name:  Second-stage image acquisition in Zeego
-    * Planned Date: 4/1-4/6 
     * Expected Date: 4/20     * Expected Date: 4/20
-    * Status: incomplete +    * Status: completed 
-  - Milestone name:  Construction of third-stage Phantom [ONYX (liquid embolic system)+  - Milestone name:  Construction of third-stage Phantom [liquid embolus
-    * Planned Date: 4/14-4/20+    * Expected Date: 4/13 
 +    * Status: complete  
 +  Milestone name:  Third-stage image acquisition in Zeego
     * Expected Date: 4/20     * Expected Date: 4/20
-    * Status: incomplete +    * Status: complete 
-  - Milestone name:  Third-stage image acquisition in experimental bench +  - Milestone name:  Construction of fourth-stage Phantom [clip]
-    * Planned Date: 4/21-4/27+
     * Expected Date: 4/27     * Expected Date: 4/27
-    * Status: incomplete  +    * Status: complete  
-  - Milestone name:  Third-stage image acquisition in Zeego +  - Milestone name:  Fourth-stage image acquisition in Zeego 
-    * Planned Date: 4/21-4/27 +    * Expected Date: 5/04
-    * Expected Date: 5/08+
     * Status: incomplete     * Status: incomplete
-**Schedule**+ 
 +**Original Schedule**
  
 {{ :courses:446:2013:446-2013-4:schedule.png?600 |}} {{ :courses:446:2013:446-2013-4:schedule.png?600 |}}
 +
 +**Revised Schedule**
 +
 +{{ :courses:446:2013:446-2013-4:newschedule.png?600 |}}
 ======Reports and presentations====== ======Reports and presentations======
  
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   * Project Checkpoint   * Project Checkpoint
     * {{:courses:446:2013:446-2013-4:checkpoint.pdf|Checkpoint Presentation}}     * {{:courses:446:2013:446-2013-4:checkpoint.pdf|Checkpoint Presentation}}
 +    * {{:courses:446:2013:446-2013-4:secondcheckpoint.pptx| Quick Checkpoint Presentation}}
   * Project Reports   * Project Reports
-    * {{:courses:446:2013:446-2013-4:phantom_construction.pdf|Phantom Construction Report}} +    * {{:courses:446:2013:446-2013-4:phantom-con.pdf|Phantom construction and Image acquisition report}} 
-    * {{:courses:446:2013:446-2013-4:data_analysis.pdf|MAR application Data Analysis Report}}+    * {{:courses:446:2013:446-2013-4:data-an.pdf|MAR application and Data analysis report}}
     * {{:courses:446:2013:446-2013-4:firstphantom_geometricartifacts_.pdf|First Phantom Images (with Geometric Artifacts)}}     * {{:courses:446:2013:446-2013-4:firstphantom_geometricartifacts_.pdf|First Phantom Images (with Geometric Artifacts)}}
 +    * {{:courses:446:2013:446-2013-4:rsna_abstract_images.pdf| Results }}
   * Paper Seminar Presentations   * Paper Seminar Presentations
     * {{:courses:446:2013:446-2013-4:paperseminar_cay_.pdf|Paper Seminar, Cay-Martinez}}     * {{:courses:446:2013:446-2013-4:paperseminar_cay_.pdf|Paper Seminar, Cay-Martinez}}
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     * {{:courses:446:2013:446-2013-4:seminar_critical_review.pdf|Paper Seminar, Wells}}     * {{:courses:446:2013:446-2013-4:seminar_critical_review.pdf|Paper Seminar, Wells}}
   * Project Final Presentation   * Project Final Presentation
-    * {{:courses:446:2013:446-2013-X:final_poster_pdf.pdf|PDF of Poster}}+    * {{:courses:446:2013:446-2013-4:projectposter.pdf|Poster}} 
 +    * {{:courses:446:2013:446-2013-4:group_4_cis_teaser_slides.pptx|Teaser}}
   * Project Final Report   * Project Final Report
-    * {{:courses:446:2013:446-2013-X:final_report.pdf|Final Report}} +    * {{:courses:446:2013:446-2013-4:final_paper.pdf|Final Report}} 
-    * links to any appendices or other material+    
  
-Materials last updated: 04/01 10:00pm+Materials last updated: 04/29 7:00pm
 ======Project Bibliography======= ======Project Bibliography=======
    
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   * MATLAB code for ROI selection and value acquisition from DICOM images   * MATLAB code for ROI selection and value acquisition from DICOM images
 +  * {{:courses:446:2013:446-2013-4:cis_group_4_matlab_scripts.zip|Zip file}}
 +
courses/446/2013/446-2013-4/metal_artifact_removal_in_c-arm_cone-beam_ct.1364871745.txt.gz · Last modified: 2013/04/01 23:02 by ccaymar1@johnshopkins.edu




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