Segmentation of 3D CT Volume Images Using a Single 2D Atlas

2005 ◽  
pp. 459-468 ◽  
Author(s):  
Feng Ding ◽  
Wee Kheng Leow ◽  
Shih-Chang Wang
Keyword(s):  
3D Ct ◽  
Ct Volume

scholarly journals 3D-CT imaging processing for qualitative and quantitative analysis of maxillofacial cysts and tumors

2002 ◽  
Vol 16 (3) ◽  
pp. 189-194 ◽  
Author(s):  
Marcelo de Gusmão Paraiso Cavalcanti ◽  
José Leopoldo Ferreira Antunes
Keyword(s):  
Volume Rendering ◽  
3D Ct ◽  
Qualitative And Quantitative ◽  
Surface Method ◽  
3D Volume ◽  
Accurate Observation ◽  
3D Volume Rendering ◽  
Surface Technique ◽  
Ct Volume ◽  
Volume Rendering Technique

The objective of this study was to evaluate spiral-computed tomography (3D-CT) images of 20 patients presenting with cysts and tumors in the maxillofacial complex, in order to compare the surface and volume techniques of image rendering. The qualitative and quantitative appraisal indicated that the volume technique allowed a more precise and accurate observation than the surface method. On the average, the measurements obtained by means of the 3D volume-rendering technique were 6.28% higher than those obtained by means of the surface method. The sensitivity of the 3D surface technique was lower than that of the 3D volume technique for all conditions stipulated in the diagnosis and evaluation of lesions. We concluded that the 3D-CT volume rendering technique was more reproducible and sensitive than the 3D-CT surface method, in the diagnosis, treatment planning and evaluation of maxillofacial lesions, especially those with intra-osseous involvement.

Abstract 3229: First Time Validation of Point to Point NavX Map Registration to 3D Subject-Specific Computed Tomography (CT)

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Mark W Kolasa ◽  
Yasuo Okumura ◽  
Susan B Johnson ◽  
Eric Olson ◽  
Jeffrey Schweitzer ◽  
...  
Keyword(s):  
Multidetector Ct ◽  
Average Distance ◽  
Lesion Size ◽  
Data Sets ◽  
3D Ct ◽  
Rf Ablation ◽  
Surface Geometry ◽  
Data Set ◽  
Subject Specific ◽  
Ct Volume

Background: Current mapping systems use simultaneous displays of overlapping 3D maps and pre-acquired CT images of the LA to “pseudo-register” data sets rather than specifically “register” each point of one mapping data set to the other. The appropriateness of the 2 data set match has not been validated. Since significant surface to surface mismatch errors may occur, this study was undertaken to quanititatively validate NavX map to CT registration and determine its suitability for guiding AF ablation. Methods: Sixty-four slice, multidetector CT scans were acquired in 8 dogs and segmented to establish subject-specific LA/PV volumes for importation into the EnSite mapping system. A detailed multi-surface geometry (NavX map) was collected by navigating a mapping catheter in target LA and PVs. Using a novel developmental registration algorithm the map was registered to LA/PV CT volume. Validation was performed using the registered 3D CT model for the guidance of ablation at the location of multiple implanted radio-opaque markers. Results: A total of 39 radio-opaque markers were implanted before CT including 9 LSPV, 8 RSPV, 7 RIPV, 9 LIPV, 3 roof, and 3 LAA locations. Subsequent registration of individual NavX maps to acquired 3D CT volume was successfully completed in all animals. RF ablations were performed at the predicted 3D registered model locations of the radio-opaque markers using 5 mm tip RF ablation catheter. Resulting mean lesion size was 5.3 x 6.5 mm. The lesions enveloped the point of marker attachment to the myocardium in 31/36 (86%) ablations. The average distance from the center of the RF lesion to the targeted site was 2.5 ± 1.5mm. 47 points were successfully navigated under fluorscopic and ICE guidance. All points were accurately portrayed on the 3D registered model. 3 points in the region of the RSPV floor did have minor offsets on the model due to technically difficult segmentation of the RSPV from the right pulmonary artery. Conclusion: These data demonstrate the feasibility of registering NavX derived geometries to CT data sets accommodating sources of cardiac, respiratory, and translational cycle dependent error. Catheter navigation precisely conducted using the registered model demonstrates accuracy within the range required for RF ablation.

scholarly journals Single minimum incision endoscopic radical nephrectomy for renal tumors with preoperative virtual navigation using 3D-CT volume-rendering

BMC Urology ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Takao Kamai ◽  
Nobutaka Furuya ◽  
Tsunehito Kambara ◽  
Hideyuki Abe ◽  
Mikihiko Honda ◽  
...  
Keyword(s):  
Volume Rendering ◽  
Radical Nephrectomy ◽  
Renal Tumors ◽  
3D Ct ◽  
Virtual Navigation ◽  
Ct Volume

Computergestützte 3D- CT Bildgebung bei der Planung und der Durchführung von Leberlebendspenden

2004 ◽  
Vol 42 (08) ◽  
Author(s):  
J Harms ◽  
H Bourquain ◽  
T Kahn ◽  
HO Peitgen ◽  
J Hauss ◽  
...  
Keyword(s):  
3D Ct
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