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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of International Society for Simulation Surgery
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International Society for Simulation Surgery
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Volume & Issues
Volume 1, Issue 2 - Dec 2014
Volume 1, Issue 1 - Jul 2014
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Reconstructing 3-D Facial Shape Based on SR Imagine
Hong, Yu-Jin ; Kim, Jaewon ; Kim, Ig-Jae ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 57~61
DOI : 10.18204/JISSiS.2014.1.2.057
We present a robust 3D facial reconstruction method using a single image generated by face-specific super resolution technique. Based on the several consecutive frames with low resolution, we generate a single high resolution image and a three dimensional facial model based on it. To do this, we apply PME method to compute patch similarities for SR after two-phase warping according to facial attributes. Based on the SRI, we extract facial features automatically and reconstruct 3D facial model with basis which selected adaptively according to facial statistical data less than a few seconds. Thereby, we can provide the facial image of various points of view which cannot be given by a single point of view of a camera.
Image Registration in Medical Applications
Hong, Helen ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 62~66
DOI : 10.18204/JISSiS.2014.1.2.062
Image registration is the process for finding the correct geometrical transformation that brings one image in precise spatial correspondence with another image. There are limitations on the visualization of simple overlay between two different modality images because two different modality images have different anatomical information, resolution, and viewpoint. In this paper, various image registration methods and their applications are introduced. With the recent advance of medical imaging device, image registration is used actively in diagnosis support, treatment planning, surgery guidance and monitoring the disease progression.
Clinical Application of Three-Dimensional Reconstruction in Shoulder Surgeries
Kim, Sung-Hwan ; Ha, Seung-Joo ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 67~70
DOI : 10.18204/JISSiS.2014.1.2.067
3-D medical image reconstruction technique using computer simulation technology has been used in the knowledge of the anatomical features and the biomechanical characteristics with the advancement of computer hardware and software. Especially, the use of 3-D image reconstruction technique in orthopaedics demonstrates that this technique is useful to improve surgical technique as well as to help inform the knowledge of shoulder joint anatomy. The purpose of this article is to introduce the utilization of 3-D image technology in shoulder surgeries.
Evaluation of Masseter Muscle Volume after Contouring of Prominent Mandible Angle by Measurement of CT Scan Image
Kim, Yong Oock ; Choi, Jong Woo ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 71~74
DOI : 10.18204/JISSiS.2014.1.2.071
Purpose The prominent mandible angle, otherwise known as "square face", has been recognized as an aesthetic problem that needs correction by many in the Asian community. Many surgeons considered that mandible angle ostectomy alone, brings about hypotrophy of the masseter muscle. However, it was only proven indirectly (by clinical experience and histological animal experiments) and not objectively. In this study, we evaluated the volume of masseter muscle to prove the effect, objectively. Materials and method Computed tomography (CT) images were used to measure the masseter muscle volume of normal female group (n=6), and of female patient group n=8, preoperative and early & late postoperative volumes) presenting the symptom of prominent mandible angle. The data was analyzed statistically by two-sample t-test and paired t-test using SAS (version 8.2). Results In normal female group, volume average was
. In patient group, preoperative volume averaged
(p<0.0001), early postoperative volume measured average of
which is a 30% increase from the preoperative volume (p<0.0001). Late postoperative measurement was
, which is a 20% decrease from the preoperative volume (p<0.0006). Conclusion The bone reduction of prominent mandible angle induce the hypotrophic effect of masseter muscle after long term follow up (5 more months). This result mean that the result of mandible angle contouring surgery can be considered as combined effect of bony angle reduction and subsequent masseter muscle hypotrophy.
Segmentation of Arterial Vascular Anatomy around the Stomach based on the Region Growing Based Method
Kang, Jiwoo ; Kim, Doyoung ; Lee, Sanghoon ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 75~79
DOI : 10.18204/JISSiS.2014.1.2.075
Purpose The region growing has a critical problem that it often extract vessels with unexpected objects such as a bone which has a similar intensity characteristics to the vessel. We propose the new method to extract arterial vascular anatomy around the stomach from the CTA volume without the post-processing. Materials and Methods Our method, which is also based on the region growing, requires the two seed points from the use. I automatically extracts perigastric arteries using the adaptive region growing method and it does not need any post-processing. Results The three region growing based methods are used to extract perigastric arteries - the conventional region growings with restrict and loose thresholds each and the proposed method. The 3D visualization from the result of our method shows our method extracted the all required arteries for gastric surgery. Conclusion By extracting perigastric arteries using the proposed method, over-segmentation problem that unexpected anatomical objects such as a rib or backbone are also segmented does not occurs anymore. The proposed method does not need to sensitively determine the thresholds of the similarity function. By visualizing the result, the preoperative simulation of arterial vascular anatomy around the stomach can be possible.
3D CT Image Processing for 3D Printed Auricular Reconstruction of Unilateral Microtia Patient
Roh, Tae Suk ; Yun, In Sik ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 80~82
DOI : 10.18204/JISSiS.2014.1.2.080
Purpose Microtia is congenital anomaly of external ear and the reconstruction method for the external ear of microtia patient was based on autogenous costal cartilage framework. The application of 3D printing technique in medical science has made more possibility of human tissue restoration, and we tried to apply this technique in auricular reconstruction field. Materials and Methods As for unilateral microtia patient, the contralateral side ear is normal and reconstructive surgeon tried to mimic it for reconstruction of affected ear. So, we obtained facial CT scan of microtia patient and made mirror image of normal side ear. Moreover, to make the 3D scaffold based on the mirror image of normal ear and to apply this scaffold for the auricular reconstruction surgery, we included auriculocephalic sulcus and anterior fixation part. Results We could successfully obtain mirror image of normal ear, auriculocephalic sulcus and anterior fixation part for 3D scaffold printing. Conclusions Using this CT image processing and 3D printing technique, we will be able to make the scaffold for auricular reconstruction of unilateral microtia patient, and perform auricular reconstruction in near future.
3D Overhead Modeling Using Depth Sensor
Song, Eungyeol ; Lee, Sangyoun ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 83~86
DOI : 10.18204/JISSiS.2014.1.2.083
Purpose This paper was purposed to suggest the method to produce the supportive helmet (head correction) for the infants who are suffering from plagiocephaly and to evaluate the level of transformation through 3D model. Method Either of CT or X-ray restored images has been used in making the supportive helmet (Head correction) in general, but these methods of measuring have problems in cost and safety. 3D surface measurement technology was suggested to solve such matters. Results It was to design the transformed model of the head within 0.7cm in average by scanning the surface of head and performing 3D restoration with marching cube and the changing rate of the head was compared in numerical data with 3D model. Conclusion The suggested methods displayed the better performance than the conventional method in respect of the speed and cost.
Aberrant Left Hepatic Artery Arising from Left Gastric Artery at Curative Gastrectomy for Gastric Cancer
An, Chansik ; Lim, Joon-Seok ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 87~89
DOI : 10.18204/JISSiS.2014.1.2.087
An aberrant left hepatic artery is one of the most common variants of hepatic arteries, and its prevalence has been reported 6.5-30%. During D2 lymph node dissection for gastric cancer, an aberrant left hepatic artery arising from left gastric artery is ligated which may lead to hepatic damage. In this case report, a 66-year-old male patient underwent total gastrectomy with D2 lymph node dissection during which the aberrant left hepatic artery was ligated. Post-operative liver function tests revealed elevated liver enzymes, and ischemic changes in the left lateral hepatic section was seen on the CT scan. On retrospective review of preoperative CT images, a replaced left hepatic artery from left gastric artery could have been identified. The information on the presence of aberrant LHA and its supplying area is clinically important when planning curative gastrectomy for gastric cancer, because extended lymph node dissection requires division of the left gastric artery and this may lead to severe liver damage. By using preoperative CT scan, detection of aberrant left hepatic artery could be done.
Mandibular Reconstruction with Free Fibular Flap and Dental Implant after Ablative Oral Cancer Surgery Using 3D RP Model: A Case Report
Kim, Duck-Hoon ; Cha, Hyun-Suk ; Ahn, Kang-Min ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 90~94
DOI : 10.18204/JISSiS.2014.1.2.090
Reconstruction of the mandible after ablative oral cancer surgery requires esthetic and functional rehabilitation. Restoring facial symmetry and dentition need accurate preoperative surgical planning and meticulous surgical technique. Free fibular flap is most useful tools to reconstruct mandible because of its adequate length and height, simultaneous harvest of soft and hard tissues and placing dental implants. In this case report, recurred squamous cell carcinoma in the right mandible had been resected and free fibular flap was utilized for mandible reconstruction using 3D rapid prototype. Simulation surgery before dental implant placement has been performed for esthetic and functional prosthodontics.
Application of 3D Simulation Surgery to Mandibular Asymmetry: Case Report
Lee, Sung-Hwa ; Lee, Ho-Sung ; Jung, Young-Soo ; Park, Hyung-Sik ; Jung, Hwi-Dong ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 95~98
DOI : 10.18204/JISSiS.2014.1.2.095
Two-dimensional cephalometric analysis has been used for diagnosis and treatment of correction of mandibular asymmetry by many maxillofacial surgeons. And 2D analysis showed excellent results in many cases, however 2D has some drawbacks in diagnosis and treatment planning because of its fundamental limitation like overlapping. Today many physicians use 3D diagnosis & treatment tools to expect better results and reduce possible errors. The aim of this report is to present treatment procedures using 3D analysis and treatment modalities for mandibular asymmetry patients.
3D Printed Titanium Implant for the Skull Reconstruction: A Preliminary Case Study
Choi, Jong-Woo ; Ahn, Jae-Sung ;
Journal of International Society for Simulation Surgery, volume 1, issue 2, 2014, Pages 99~102
DOI : 10.18204/JISSiS.2014.1.2.099
The skull defect can be made after the trauma, oncologic problems or neurosurgery. The skull reconstruction has been the challenging issue in craniofacial fields for a long time. So far the skull reconstruction with autogenous bone would be the standard. Although the autogenous bone would be the ideal one for skull reconstruction, donor site morbidity would be the inevitable problem in many cases. Meanwhile various types of allogenic and alloplastic materials have been also used. However, skull reconstruction with many alloplastic material have produced no less complications including infection, exposure, and delayed wound healing. Because the 3D printing technique evolved so fast that 3D printed titanium implant were possible recently. The aim of this trial is to try to restore the original skull anatomy as possible using the 3D printed titanium implant, based on the mirrored three dimensional CT images based on the computer simulation. Preoperative computed tomography (CT) data were processed for the patient and a rapid prototyping (RP) model was produced. At the same time, the uninjured side was mirrored and superimposed onto the traumatized side, to create a mirror-image of the RP model. And we fabricated Titanium implant to reconstruct three-dimensional orbital structure in advance, using the 3D printer. This prefabricated Titanium-implant was then inserted onto the defected skull and fixed. Three dimensional printing technique of titanium material based on the computer simulation turned out to be very successful in this patient. Individualized approach for each patient could be an ideal way to manage the traumatic patients in near future.