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"In this paper, we study linear approaches for 3D model acquisition from non-calibrated images. First, the intrinsic andextrinsic camera calibration is taken into consideration. In particular, we study the use of a specific calibrationprimitive: the parallelepiped. Parallelepipeds are frequently present in man-made environments and naturally encode theaffine structure of the scene. Any information about their euclidean structure (angles or ratios of edge lengths), possiblycombined with information about camera parameters is useful to obtain the euclidean reconstruction. We propose anelegant formalism to incorporate such information, in which camera parameters are dual to parallelepiped parameters,i.e. any knowledge about one entity provides constraints on the parameters of the others. Consequently, an image aparallelepiped with known Euclidean structure allows to compute the intrinsic camera parameters, and reciprocally, acalibrated image of a parallelepiped allows to recover its euclidean shape (up to size). On the conceptual level, thisduality can be seen as an alternative way to understand camera calibration: usually, calibration is considered to beequivalent to localizing the absolute conic or quadric in an image, whereas here we show that other primitives, such ascanonic parallelepipeds, can be used as well. While the main contributions of this work concern the estimation ofcamera and parallelepiped parameters. The complete system allows both calibration and 3D model acquisition from asmall number of arbitrary images with a reasonable amount of user interaction."

"Lapangan geotermal “x” merupakan salah satu lapangan geotermal di Indonesia yang sedang dalam proses pengembangan. Tahap eksplorasi merupakan tahapan yang paling mempunyai resiko yang besar. Untuk mengurangi resiko tersebut, diperlukan data – data yang saling terintegrasi untuk menggambarkan sistem geotermal bawah permukaan secara representatif. Data magnetotellurik dan gravitasi merupakan data utama dalam pembuatan model konseptual sistem geotermal lapangan “x”. Selain itu juga didukung dengan data geokimia dan data sumur landaian suhu. Dari metode magnetotellurik yaitu berupa analisis fasa tensor dan induction arrow didapatkan arah struktur utama atau bisa disebut dengan geoelectrical strike yaitu berarah Timurlaut – Baratdaya atau lebih tepatnya mempunyai arah N80oE. Hal ini juga diperkuat dari metode gravitasi berupa analisis derivatif dan data geologi regional dimana struktur yang teridentifikasi juga dominan berarah Timurlaut – Baratdaya. Dari hasil pengolahan data gravitasi berupa data complete bouger anomaly mempunyai nilai 53 – 82 mgal dimana daerah yang mempunyai anomali tinggi berada pada daerah sekitar manifestasi hingga ke Timur daerah penelitian. Hasil pemodelan inversi 3D dari data magnetotellurik didapatkan batuan claycap mempunyai ketebalan berkisar antara 400 – 500 m. Batuan yang berperan sebagai heatsource merupakan batuan intrusi yang mempunyai nilai resistivitas hingga mencapai 400 ohm-m. Dari analisis data geokimia menunjukkan daerah outflow pada sistem geotermal yaitu daerah dimana terdapatnya manifestasi yang muncul ke permukaan. Dari semua data tersebut dapat diintegrasikan menjadi model konseptual sistem geotermal dimana dapat digunakan sebagai acuan dalam melakukan pemboran geotermal.

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The geothermal field "x" is one of the geothermal fields in Indonesia which is in the process of being developed. The exploration stage is the stage that has the greatest risk. To reduce this risk, integrated data is needed to describe the subsurface geothermal system in a representative manner. Magnetotelluric and gravity data are the main data in making a conceptual model of the field "x" geothermal system. Also besides supported by geochemical data and temperature sloping well data. From the magnetotelluric method, namely in the form of phase tensor analysis and induction arrow, the direction of the main structure is obtained or it can be called a geoelectrical strike, which is in the Northeast - Southwest direction or more precisely has a direction of N80oE. This is also reinforced by the gravity method in the form of derivative analysis and regional geological data where the identified structures are also predominantly northeast-southwest trending. From the results of processing gravity data in the form of complete bouge anomaly data has a value of 53 - 82 mgal where areas that have high anomalies are in the area around the manifestation to the east of the study area. The results of 3D inversion modeling from the magnetotelluric data show that clay cap rocks have a thickness ranging from 400 - 500 m. Rocks that act as heat sources are intrusive rocks that have a resistivity value of up to 400 ohm-m. The geochemical data analysis shows the outflow area in the geothermal system, namely the area where there are manifestations that appear to the surface. From all these data, it can be integrated into a conceptual model of the geothermal system which can be used as a reference in carrying out geothermal drilling."

"ABSTRAK Nama Isma Tria SavitriProgram Studi Pendidikan Dokter Gigi Spesialis Bedah MulutJudul Keakuratan Model 3 Dimensi Fused Deposition Modeling FDM Dibandingkan CT Scan 3 Dimensi pada Pengukuran Panjang Vertikal Ramus Mandibula Jarak Gonion Menton dan Gonial Angle Latar Belakang Rekonstruksi dan koreksi defek pada regio kraniomaksilofasial membutuhkan perencanaan pra operasi yang sangat matang Hal ini dikarenakan anatomi pada regio ini sangat kompleks melibatkan sistem sistem yang sensitif berdekatan dengan struktur anatomis vital serta mempengaruhi penampilan dan fungsional Dengan perkembangan teknologi di bidang Computed Tomography mampu menciptakan pendekatan perawatan yang baru serta memungkinkan untuk memperoleh model tulang tengkorak 3 Dimensi 3D menggunakan teknik solid free form fabrication SFF Tiap tahapan proses produksi berpotensi untuk terjadi error dan menghasilkan model akhir yang mengalami distorsi Tujuan Penelitian ini dilakukan untuk mengetahui keakuratan dari model 3D FDM dengan cara membandingkan panjang vertikal ramus mandibula jarak Gonion Menton dan gonial angle pada model 3D dengan pengukuran pada CT rekonstruksi 3D Metode Penelitian 8 Sampel data CT scan pasien Bedah Mulut dan Maksilofasial Fakultas Kedokteran Gigi Universitas Indonesia Rumah Sakit Cipto Mangunkusumo Jakarta dibuatkan model 3D menggunakan teknik FDM Kemudian dilakukan pengukuran panjang vertikal ramus mandibula jarak Gonion Menton dan gonial angle terhadap CT rekonstruksi 3D menggunakan piranti lunak OsiriX dan model 3D menggunakan kaliper digital dan goniometri lalu hasil keduanya dibandingkan Hasil Tidak terdapat perbedaan yang bermakna antara pengukuran panjang vertikal ramus mandibula jarak Gonion Menton dan gonial angle pada CT 3D dan model 3D FDM Kesimpulan Model 3D yang menggunakan teknik FDM dinilai akurat sehingga dapat diterima secara klinis Kata kunci Model 3D FDM CT 3D panjang vertikal ramus mandibula jarak Gonion Menton gonial angle.ABSTRACT Name Isma Tria SavitriStudy Program Post Graduate Student of Oral and Maxillofacial SurgeryTitle Accuracy of Three Dimensional Fused Deposition Modeling FDM Models Compared with Three Dimensional CT Scans on Measurement of Mandibular Ramus Vertical Length Gonion Menton Length and Gonial Angle Background Pre surgical treatment planning plays important role in reconstruction and correction of defect in craniomaxillofacial region The advance of solid freeform fabrication techniques has significantly improved the ability to prepare biomodel using computer aided design and data from medical imaging Many factors are implicated in the accuracy of the 3D model Purpose To determine the accuracy of the three dimensional fused deposition modeling FDM models compared with three dimensional CT scans on measurement of mandibular ramus vertical length Gonion Menton length and Gonial angle Research Methods 8 3D Models were produced from 8 CT scan data DICOM file patients of Oral and Maxillofacial Department Fakultas Kedokteran Gigi Universitas Indonesia Rumah Sakit Cipto Mangunkusumo Three measurements were done three times by two examiner Measurement of 3D CT scans were made using OsiriX software while measurement of 3D models were made using digital caliper and goniometry The measurement results were then compared Result There is no significant difference between measurement of mandibular ramus vertical length Gonion Menton length and Gonial angle 3D CT scans and FDM 3D models Conclusion FDM 3D models are considered accurate and is acceptable for clinical applications in dental and craniomaxillofacial surgery."

"Latar Belakang: Kondilus mandibula sering terlibat dalam berbagai kondisi patologis seperti tumor dan cedera traumatis, dimana melibatkan kondilus mandibula sehingga memerlukan reseksi dan pengangkatannya. Ameloblastoma mencakup sekitar 14% dari semua tumor rahang dan kista dan merupakan tumor odontogenik yang prevalensinya paling tinggi di negara berkembang. Pelat rekonstruksi mandibula digunakan dalam bedah mulut dan maksilofasial untuk rekonstruksi defek mandibula. Karena mandibula memainkan peran sentral dalam fungsi dan estetika, hilangnya kontinuitas rahang dapat sangat merusak integritas rahang pasien, dan sangat mempengaruhi persepsi diri dan kepercayaan diri pasien. Saat ini, kemajuan teknologi tiga dimensi (3D) dapat digunakan untuk membuat model aloplastik untuk rekonstruksi mandibula.Tujuan Penelitian: Mengetahui dan menganalisis perbedaan perubahan posisi protesa kondilus pada pasien ameloblastoma pascareseksi disartikulasi yang menggunakan 3D Model STL dan tidak menggunakan 3D Model STL pre operasi pada kontrol 1 hari setelah operasi dan 6 bulan pascareseksi mandibula di Rumah Sakit Ciptomangunkusumo Jakarta periode 2015-2020. Metode Penelitian: 22 subjek penelitian panoramik diambil dari pasien Rumah Sakit Ciptomangunkusumo sesuai dengan kriteria inklusi dan ekslusi. Subjek penelitian dilihat perbedaan nilai rata-rata tinggi protesa kondilus antara 2 kelompok (dengan Model 3D STL dan tanpa Model 3D STL) pada 1 hari pascareseksi dan 6 bulan pascareseksi. Pengukuran dilakukan dengan menggunakan aplikasi IC Measure. Analisis data untuk melihat perbedaan nilai rata-rata letak posisi protesa kondilus antara 2 kelompok (dengan Model 3D STL dan tanpa Model 3D STL) pada 1 hari pasca reseksi dan 6 bulan pasca reseksi dilakukan dengan menggunakan Uji Dependent T.test dan Wilcoxon- Signed Rank test dan perbedaan nilai tinggi dan letak posisi protesa kondilus antara 2 kelompok (dengan Model 3D STL dan tanpa Model 3D STL) 1 hari pasca reseksi dan 6 bulan pasca reseksi dengan menggunakan Uji ANOVA.Hasil: Terdapat perbedaan ketinggian dengan nilai P sebesar P= 0,004 dan tidak terdapat perbedaan letak protesa yang signifikan secara statistik dengan nilai P sebesar P= 0,66 antara kontrol 1 hari pasca reseksi dan 6 bulan pasca reseksi dengan model 3D STL. Terdapat perbedaan ketinggian dengan nilai P sebesar P=0,005 dan tidak terdapat perbedaan letak protesa yang signifikan secara statistik dengan nilai P sebesar P= 0,76 antara kontrol 1 hari pascareseksi dan 6 bulan pascareseksi tanpa model 3D STL.Kesimpulan: tidak terdapat perbedaan ketinggian dan letak protesa pada fossa kondilus yang signifikan secara statistik antara kelompok 1 hari tanpa model STL, 1 hari dengan model STL, 6 bulan dengan model STL dan 6 bulan tanpa model STL pascareseksi disartikulasi.

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Background: Mandibular condyles are often involved in various pathological conditions such as tumors and traumatic injuries, that involving the mandibular condyles that require resection and removal. Ameloblastoma accounts for approximately 14% of all jaw tumors and cysts and is the most prevalent odontogenic tumor in developing countries. Mandibular reconstruction plates are used in oral and maxillofacial surgery for the reconstruction of mandibular defects. Since the mandible plays a central role in function and esthetics, loss of jaw continuity can severely impair the patient's jaw integrity, and severely affect the patient's self-perception and self-confidence. Currently, technological advances in three-dimensional (3D) models can be used to create alloplastic models for mandibular reconstruction.

Aim: To know and analyze the differences in the position changes of the condylar prosthesis in ameloblastoma patients after disarticulation resection using the 3D STL model and not using the 3D STL model preoperatively in controls 1 day after surgery and 6 months after mandibular resection at Ciptomangunkusumo Hospital, Jakarta. 2015-2020 period.

Methods: 22 panoramic research subjects were taken from Ciptomangunkusumo Hospital patients according to the inclusion and exclusion criteria. Research subjects saw the difference in the average height of the condylar prosthesis between the 2 groups (with 3D STL model and without STL 3D model) at 1 day post-resection and 6 months post-resection. Measurements are carried out using the IC Measure application. Data analysis to see the difference in the average value of the position of the condylar prosthesis between the 2 groups (with 3D STL Model and without 3D STL Model) at 1 day post-resection and 6 months post-resection was carried out using the Dependent T.test and Wilcoxon-Signed Rank Test. The difference in the height and position of the condylar prosthesis between the 2 groups (with 3D STL model and without STL 3D model) 1 day after resection and 6 months after resection using the ANOVA test.

Result: There was a difference in height with a P value of P = 0.004 and there was no statistically significant difference in location with a P value of P = 0.66 between controls 1 day post-resection and 6 months post-resection with the 3D STL model. There was a difference in height with a P value of P = 0.005 and there was no statistically significant difference in the location of the protest with a P value of P = 0.76 between controls 1 day post-resection and 6 months post-resection without the 3D STL model.

Conclusion: There was no statistically significant difference in height and position of the prosthesis between controls 1 day post-resection and 6 months post-resection without 3D STL model, there was no statistically significant difference in height and position of the prosthesis between controls 1 day post-resection and 6 months post resection with 3D STL model."