Section 2 M Vision Geometry Calibration V Mc 062707 V Rjo062807

[object Object],[object Object],MVision Physicist Self-Led Training 81 40 258 Rev. C Siemens Medical Solutions, Inc. Oncology Care Systems Group 4040 Nelson Avenue Concord, CA 95420 The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility modal or design, are reserved.

Section 2: Table of Contents Geometry Calibration Phantom positioning Geometry Calibration field creation MVision Gain Field Creation Videos: MVision Gain Projection Matrices Phantom Positioning Geometry Calibration MVision Protocol Geometry Calibration Phantom MVision Image Reconstruction Overview Scale Factor Objectives

Section 2: Table of Contents MVision Geometry Calibration (p. 50) Section 2 Quiz Geometry Calibration Phantom Setup (p. 40) Section 2 Review Videos : Fail to Pass Geometry Calibration MVision Geometry Calibration Video: Geometry Calibration MVision Protocol Geometry Calibration Results MVision Gain Geometry Calibration Window Labs : MVision Control Console Display

Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Overview Figure 2.0 Geometry Calibration phantom

Overview Figure 2.1 Projection image of the phantom

Geometry Calibration Phantom Cradle Gantry Side Figure 2.2 Geometry Calibration Phantom Perspective View Shell

Geometry Calibration Phantom Cradle Base Plate Figure 2.3 End and Side Views of the Phantom Small Tungsten Beads Large Tungsten Beads Level screw

Geometry Calibration Phantom ,[object Object],Table 2.0 108 Number of Ball Bearings 6 mm Diameter of the large Ball Bearings 3.2 mm Diameter of the small Ball Bearings 140 mm Diameter of the Phantom Cylinder Dimensions Physical Parameter

Geometry Calibration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Geometry Calibration Figure 2.4 PROJECTION MATRICES PHANTOM MODEL: 3D INPUT PHANTOM IMAGES : 2D INPUT

Geometry Calibration ,[object Object],[object Object],Figure 2.5 u V 0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 1 1 0 0 0 1 1 1 1 1 0 1 0 0 0 1 1 0 1 0 1 0 0 0 0 0 1 1 1 0 0 1 1 0 1 1 1 0 0 0 1 0 0 1 1 1 0 1 0 1 1 0 1 1 0 0 0 0 1 0 1 1 0 01 0 0 1 0 1 0 1 0 1 1 1 1 0 0 1 0 1 1 1 0 1 1 1 1 1 1 1 Encoded ball bearing list from 2D projection images

Geometry Calibration ,[object Object],[object Object],Bead X,Y,Z Coordinates Bead Size Bead Type Bead ID Figure 2.6

Geometry Calibration ,[object Object],Figure 2.8 r Flat Panel Gantry X-ray Source Y Z X V u World (IEC) coordinate system 1 Gantry coordinate system 2 Camera coordinate system 3 X-ray receptor coordinate system 4 Pixelised Imaging coordinate system 5

Projection Matrix ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Projection Matrix ,[object Object],Figure 2.9 Projection matrix coefficients 2D Ball bearing position on the phantom projection images 3D Ball bearing position on the phantom model

Projection Matrix ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Projection Matrix ,[object Object],Figure 2.10

Scale Factor ,[object Object],[object Object],[object Object],Figure 2.11 non-attenuated beam Intensity from gain images Monitor units used to acquire gain images

MVision Image Reconstruction ,[object Object],[object Object],[object Object],Figure 2.12

MVision Image Reconstruction ,[object Object],Figure 2.13 Flat panel LINAC Radiation Source Reconstructed MVision Slice b) LINAC Radiation Source Reconstruction Volume a)

MVision Image Reconstruction ,[object Object],Figure 2.14 X-ray source Projection Image Reconstruction Volume i(u,  ) - pixel intensity at u,v position u v

MVision Image Reconstruction ,[object Object],Figure 2.15 e) Filtered Image 1 Projection a) 2 Projections b) 4 Projections c) 256 Projections d)

MVision Gain ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MVision Gain ,[object Object],Figure 2.16

MVision Gain Field Creation ,[object Object],[object Object],Figure 2.17

MVision Gain Field Creation ,[object Object],Figure 2.18

MVision Gain Field Creation ,[object Object],Figure 2.19

MVision Gain Field Creation ,[object Object],[object Object],[object Object],Figure 2.20

MVision Protocol ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MVision Protocol ,[object Object],[object Object],Figure 2.21 Cone Beam Protocol icon

MVision Protocol ,[object Object],Figure 2.22 Reconstruction Kernel Smoothing-Pelvis (Default) Protocol Monitor Units Slice Size (pixels) 128 x 128 256 x 256 (default) 512 x 512 Slice Thickness (default 1mm) MVision protocol name

MVision Protocol ,[object Object],Figure 2.23

MPR Thickness ,[object Object],Figure 2.30

Phantom Positioning ,[object Object],Figure 2.31 a) c) b)

[object Object],[object Object],[object Object]

Geometry Calibration Field Creation ,[object Object],Figure 2.32

Geometry Calibration Field Creation ,[object Object],Figure 2.33

MVision Control Console Display Figure 2.34

Geometry Calibration Window ,[object Object],Figure 2.35 Acquired Projection Images are displayed here Images that have a valid Projection Matrix after interpolation are displayed here Images that have an invalid Projection Matrices are displayed here Images that have Valid Projection Matrices are displayed here

Geometry Calibration Results ,[object Object],Figure 2.36 Dog Ear

Geometry Calibration Results ,[object Object],Figure 2.37

Geometry Calibration Results ,[object Object],Figure 2.38

[object Object],[object Object]

Troubleshooting ,[object Object],[object Object],Figure 2.39

Troubleshooting ,[object Object],[object Object],[object Object],Figure 2.40

Troubleshooting ,[object Object],Figure 2.41

Troubleshooting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Section 2 Review ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

1) The MVision Geometry Calibration is required in order to: ,[object Object],[object Object],[object Object],[object Object]

2) In order to perform the Geometry Calibration one should: ,[object Object],[object Object],[object Object],[object Object],[object Object]

3) The Geometry Calibration phantom model and the phantom projection images provide the input necessary to: ,[object Object],[object Object],[object Object],[object Object]

4) With regards the projection matrices it is correct to state that : ,[object Object],[object Object],[object Object],[object Object]

5) In the MVision Protocol configuration window the protocol parameters that can be changed are: ,[object Object],[object Object],[object Object],[object Object],[object Object]

6) Increasing a slice size of a MVision image will cause the image spatial resolution, image noise and low contrast resolution respectively to: ,[object Object],[object Object],[object Object],[object Object]

7) A 5mm increase in the MVision slice thickness will: ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],8) A Head and Neck patient of standard size will be imaged with MVision. The Kernel and MPR combination that will provide better soft tissue contrast and less cupping artifact:

9)Overall an increase on the monitor in a MVision acquisition will: ,[object Object],[object Object],[object Object],[object Object]

10) Regarding the Geometry Calibration which one of the following is correct: ,[object Object],[object Object],[object Object],[object Object]

11) Which of the following is correct about the MVision gain calibration: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Answer Key ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Section 2 M Vision Geometry Calibration V Mc 062707 V Rjo062807

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Section 2 M Vision Geometry Calibration V Mc 062707 V Rjo062807