distributed 3 d medical image registration using intelligent agents

... local area network (LAN) and its architecture combines distributed monitoring and data reduction with centralized data analysis [3] A DIDS director, a LAN monitor, and a series of host monitor ... transmitted to the DIDS director This director is responsible for analyzing all these data and detecting possible attacks A shortcoming of DIDS is that the centralized nature of DIDS will limit ... files and it is system-dependant 5.4 Example of Agents Interactions Diagram In this diagram, we show the interactions between the different agents in order to detect the network attack called Doorknob...

Ngày tải lên: 14/02/2014, 16:20

... model and used for model-guided segmentation Later, another subdivision-surface wavelet constructed for functions defined on triangulated spherical domains were introduced by Schr¨der and Sweldens ... find an appropriate p which can maximize Eq (2.8) Upon the success of using deformable Fourier models in 2D, Staib and Duncan [3] extended this method into 3D In 3D, a surface can be represented ... work using this model has been done so far 2.2 .3 Distance Transform/Level Set This method was developed by Osher and Sethian firstly in 2D [34 ] and has been extended to surfaces [35 ] The main idea...

Ngày tải lên: 12/09/2015, 08:19

... seemingly hidden features in an image because it is not affected by image intensity and gradient magnitude It should be stressed that image intensity and gradient magnitude are largely influenced by ... surrounding the tooth enamel With the inclusion of the step, described above, computer-aided analysis of 3- D maxillofacial image data could lead to the realization of more advanced computerbased systems ... extracted does not directly define the occlusal plane We may need to devise a step to separate the tooth enamel of erupted teeth from that of embedded teeth  139 Lastly, we have presented a method...

Ngày tải lên: 16/09/2015, 17:11

... first performed (Sections 4 .3. 1 and 4 .3. 2), and the segmentation in the x-y-plane (i.e., within a CT image) is conducted using a double-thresholding technique (Section 4 .3. 3) The mandible is 86 ... their twodimensional counterparts, 3- D edges are also defined as discontinuities in image intensity caused by the transition from one homogeneous 3- D region to another 3- D region of a different ... the condition D can be expressed as ( D( r ) = Scale − d left − d right (d left + d right ) ), (4.14) where d left and d right are the distances from the symmetry axis of the left and right darkest...

Ngày tải lên: 16/09/2015, 17:11

... (blue dots: first candidates, yellow: second candidates, red: third candidates) Figure 3. 20: Detected gum margin Figure 3. 21: 3- D presentation of the detected gum margin 76 3. 8 Results and Discussion ... Range Image (3. 2 .3) Ridge Detection (3. 3.1) Dental Arch Detection (3. 3.2) Generation of Panoramic Range Image (3. 3 .3) First Tooth-interstice Detection (3. 4) Second Tooth-interstice Detection (3. 5) ... Regularly spaced 2 -D array 3- D model y x Figure 3. 6: Mapping of the vertices onto a 2 -D array Figure 3. 7: Plan-view range image of the digitized dental cast 55 3. 3 Determination of the Dental Arch...

Ngày tải lên: 16/09/2015, 17:11

... originally devised for detecting step edges [31 ], and may not be well suited to crease edge detection The next three methods (b)− (d) are designed specifically for detecting crease edges However, ... a first-derivative-based method (a) M < 10 (b) M < 20 (c) M < 30 (d) M < 40 19 2.2.2 Second-derivative-based Methods These methods attempt to detect crease edges using the second derivative ... Responds well to crease • Cannot separate roof and edges regardless of their valley edges gradient magnitudes 38 2 .3 3 -D Line Detection 2 .3. 1 Eigenvalue Analysis It is known that a 3- D object...

Ngày tải lên: 16/09/2015, 17:11

... have made the use of 3- D maxillofacial image data increasingly more common 3- D data are obtained in two forms, surface-scan data and volumetric data Surface-scan data is generally provided as a ... the system, we studied the problem of automated tooth segmentation and developed suitable algorithms Figure 1.1: Surface-scan data of a dental study model CT provides detailed 3- D information of ... 2 Traditionally, maxillofacial image data have been provided in the form of 2 -D images such as photographs and X-ray radiographs In recent years, however, rapid advances in medical imaging...

Ngày tải lên: 16/09/2015, 17:11

... applied to both 2 -D and 3- D images Therefore, discussions on 2 -D image registration and 3- D image registration continue in parallel First the 2 -D methods and algorithms are described and then ... Selection 3. 1 Points 3. 2 Lines 3. 2.1 Line detection using the Hough transform 3. 2.2 Least-squares line fitting 3. 2 .3 Line detection using image gradients 3. 3 Regions 3. 4 Templates 3. 5 Summary 3. 6 Bibliographical ... Date: 2005.05. 03 21:14:16 +08'00' 2 -D and 3- D Image Registration 2 -D and 3- D Image Registration for Medical, Remote Sensing, and Industrial Applications A Ardeshir Goshtasby A John Wiley & Sons,...

Ngày tải lên: 06/03/2014, 12:20

... performed on the individual images which results in a position and size invariant gesture recognition mode Summary Image sequence recognition based on novel pseudo three-dimensional Hidden Markov Models ... 1997, pp 33 733 376 [4] T Starner, J Weaver, and A Pentland, Real-Time American Sign Language Recognition Using Desk and Wearable Computer Based Video, IEEE Trans on Pattern Recognition and Machine ... and Signal Processing , Dallas, 1997, pp 697700 [8] S Kuo and O Agazzi, Keyword Spotting in Poorly Printed Documents Using Pseudo 2 -D Hidden Markov Models, IEEE Trans on Pattern Recognition and...

Ngày tải lên: 24/04/2014, 13:44

... framework for the analysis and design of algorithms to estimate 3- D shape from defocused and blurred images, and to eliminate defocus and blur and thus yield “restored” images It presents a collection ... with the 3- D shape and radiance of the scene A yet more sophisticated approach, discussed in Appendix D, Section D. 2, is to build a specialized imaging device that can generate defocused images ... 3. 3 The role of radiance 3. 3.1 Harmonic components 3. 3.2 Band-limited radiances and degree of resolution 3. 4 Joint observability of shape and radiance...

Ngày tải lên: 05/06/2014, 12:03

... Received packet and frame statistics for the evaluation experiments Frame type Packet delay (ms) Frame delay (ms) I P B 30 2.85 33 9.87 9 73. 86 32 3.45 32 2.89 962 .32 I P B 30 2.85 34 0.81 942. 43 3 23. 32 32 3.59 ... transformed data are then coded by bitlevels and the output is coded using QM-coder [29], an advanced binary arithmetic coder The algorithm processes the bits of the wavelet transformed image data in decreasing ... Section concludes the article and discusses future work RELATED WORK IN SCALABLE CODING AND ADAPTIVE IMAGE AND VIDEO TELEMEDICINE SYSTEMS Scalable image and video coding has attracted recently the...

Ngày tải lên: 22/06/2014, 19:20

... each patient For Case 1, a wedged 3- beam 3D plan was created A wedged two-field 3D- conformal plan was designed for Case The respective treatment plans were then copied over from the maximum inspiration ... large Vinogradskiy et al [29] demonstrated by measurement that 4D dose calculations provided greater accuracy than 3D dose calculations in heterogeneous dose regions Rosu et al [30 ] studied how many ... method, 4D dosimetry is proved accurate based on point-dose measurement in a moving phantom Monte Carlo 4D dose calculation would provide a planned dose distribution that is closer to the delivered...

Ngày tải lên: 09/08/2014, 08:23

... )) = D0 , (D K ref K D4 D (υ2 ) = (DAppD (υ2 ) + DAppD (υ2 ) + + DAppD (υ2 )) = D0 , K AppD ref K D4 D (υm ) = (D (υm ) + DAppD (υm ) + + DAppD (υm )) = D0 , K ref D4 D (υ1 ) = 1st voxel; 2nd voxel; ... prescribed_dose ) of the prescribed dose volume in 4D dose distribution (V 4D ) and deliverable AppD (V AppD ) was calculated for plans derived from both the t4Dplan method and the ITV method for ... TV had voxels (shadow area) So the linear equations were constructed by 4D dose convolution of each TV voxel as follows: ref D4 D (υ1 ) = ( D1 + ref D4 D (υ2 ) = ( D2 + D2 + D3 + D3 ) = D0 , D4 )...

Ngày tải lên: 09/08/2014, 09:20

... Isodose distribution (dose wash) for IMRT and 3D- CRTa) Isodose distribution (dose wash) for IMRT and 3DCRT-planning b) Dose-volume-histograms for IMRT and 3D- CRT in comparison (IMRT: aligned, 3D- ... tangential field intensity modulated radiation therapy (IMRT) using sliding window technique and dosimetric comparison with 3D conformal therapy (3DCRT) in breast cancer Med Dosim 2007, 32 (4):299 -30 4 Pinkawa ... versus 3D- CRT-plans and also to determine statistical differences between mean doses and EUD's in the IMRT- and 3D- CRT-plans Values are expressed as mean ± standard deviation or as mean value and...

Ngày tải lên: 09/08/2014, 10:20

Ngày tải lên: 29/11/2014, 07:21

... Predi ted c frame2 3DMoton i Estmaton i i Huffman Codi g n Huffman Codi g n Resi ual d frame2 3D- IWTand 3D- SPIHT 3D- IWTand 3D- SPIHT Resi ual d frame1 3D- IWTand 3D- SPIHT 01011100011 Codigbistream ... Since 4D image data can be represented as multiple 3D frames, it is possible to code these 3D images independently on a 3D- frame by 3D- frame basis However, such 3D methods not exploit the dependencies ... original image is recovered [3, 31 ] In the proposed method, consecutive 3D volumetric images are divided into 3D key and 3D intermediate frames (i.e volumetric images), which is similar to video coding...

Ngày tải lên: 15/09/2015, 22:16

... and Goodwill (1997) presented a depth-averaged model and compared its predictions for a water surface profile along the 180o bend channel The bend-flow was also considered using depth-averaged ... J A 1997 Depth-averaged hydrodynamic model in curvilinear collocated grid J Hydr Engrg., ASCE, 1 23( 5), pp 38 0 -38 8 29 Younus M And Chaudhry M H 1994 A depth-averaged k − ε turbulence model for ... flow pattern around groynes Jin and Steffler (19 93) developed a depth-averaged model and included the effects of velocity distribution in depth by using empirical velocity distribution equations...

Ngày tải lên: 06/11/2012, 10:35

... lớn là: 30 0 x 1,5 = 4,5( V ) 100 II.DUNG CU C KHI Quan sat hinh ve, hay cho biờt tờn goi va cụng dung cua cac dung cu nay? Tờn dng c Hinh ve Cụng dng Thc cuụn o chiờu dai Thc cp o ng kinh d y iờn, ... chinh xac ng kinh d y iờn (1/1000) Tờn dung cu Hinh ve Cụng dung Tua vit Vn vit Bua Tao lc õp Ca st cõm tay Kim cac loai Ct Gi d y d n Tờn dung cu Khoan cõm tay Hinh ve Cụng dung Tao lụ Trong ... lp t va sa cha mang iờn, thng phai s dung mụt sụ dung cu c khi lp t d y d n va cac thiờt bi iờn Hiờu qua cụng viờc phu thuục mụt phõn vao viờc chon va s dung dung cu lao ụng o -Tra li cac cõu...

Ngày tải lên: 17/10/2013, 02:11

... gần Disney Chicken Little Meet the Robinsons phát hành với phiên 3- D, 3- D sản phẩm sản xuất sau trình chuyển hóa thực bên xưởng phim Bolt phim hoạt hình d i Disney lập kế hoạch thiết kế d nh ... phim Disney Xưởng phim hoạt hình Walt Disney từ lâu tiếng đầu lĩnh vực công nghệ liên quan đến phim hoạt hình, truyền thống lại tiếp tục với tác phẩm Bolt Disney Digital 3- D Hai phim hoạt hình d i ... Saturday Night Fever, phim d y lên tượng nhảy disco vào năm 70 Lần gần John Travolta xuất phim hài Wild Hogs Ông vừa hoàn thành xong trình quay phim The Taking of Pelham 1 23, d kiến mắt vào 31 ...

Ngày tải lên: 08/11/2013, 01:15

... continue upward – it indicates that the convergence has NOT been reached The model must be redesigned Save the results window 29 Click Enter the results window file name e.g guide_no_fillet.rwd OK Exit ... magnitude of max displacement and where it is occurred? • Convergence of Max von Mises Stress Plot Use colors for figures of model, stress and displacement Change the background color to white 31 32 ... Stress Fringe Plot under Title Click Display Options tab 19 Check Continuous Tone, Deformed Keep Show Loads and Show Constraints checked Click OK and Show Change the background color to white Format...

Ngày tải lên: 12/12/2013, 12:15