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"The enclosed CD-ROM again offers copies of all figures in the book and attractive case studies, including many examples from the most recent 64-slice acquisitions, and interactive exercises for image viewing and manipulation. This book is intended for all those who work daily, regularly or even only occasionally with CT: physicians, radiographers, engineers, technicians and physicists. A glossary describes all the important technical terms in alphabetical order. The enclosed DVD again offers attractive case studies, including many examples from the most recent 64-slice acquisitions, and interactive exercises for image viewing and manipulation"

"The enclosed CD-ROM again offers copies of all figures in the book and attractive case studies, including many examples from the most recent 64-slice acquisitions, and interactive exercises for image viewing and manipulation. This book is intended for all those who work daily, regularly or even only occasionally with CT: physicians, radiographers, engineers, technicians and physicists. A glossary describes all the important technical terms in alphabetical order. The enclosed DVD again offers attractive case studies, including many examples from the most recent 64-slice acquisitions, and interactive exercises for image viewing and manipulation"

"PURPOSE: A thick pancreas has proven to be a conspicuous predictor of pancreatic fistula (PF) following distal pancreatectomy (DP) using staples. Other predictors for this serious surgical complication currently remain obscure. This study sought to identify novel predictors of PF following DP. METHODS: One hundred and twenty-two patients were retrospectively assessed to determine the correlation between PF occurrence and the clinicopathological findings and radiologic data from preoperative computed tomography (CT). CT assessments included the thickness of the pancreas (TP) and pancreatic CT number (pancreatic index; PI), calculated by dividing the pancreatic CT by the splenic CT density. RESULTS: Twenty-four patients (19.7%) developed a clinically relevant PF. TP was identified as an independent risk factor for PF in multivariate analyses (odds ratio 1.17; P = 0.0095). In subgroup analyses, a lower PI in a thick pancreas was a significant predictor of PF (P = 0.032). The combination of these two prediction parameters, known as the TP-to-PI ratio (TPIR), showed a significantly better prediction ability than TP alone (area under the receiver operating characteristic curve for the incidence of PF, TPIR 0.80 vs. TP 0.69; P = 0.037). CONCLUSION: Combining the CT number with TP substantially improves the prediction ability for the incidence of PF following DP with staple use."

"ABSTRACTPurposeWe compared three dimensional (3D) and two dimensional (2D) measurements of the solid component to determine radiological criteria for sublobar resection of lung adenocarcinoma ≤ 2 cm in size.MethodsWe included 233 surgical cases. The maximum size of the solid component for 3D measurement was calculated by delineating the solid component on successive axial images and reconstructing the 3D surface model.ResultsThe predictive performance for adenocarcinoma in situ (n = 43) and minimally invasive adenocarcinoma (n = 77) were equivalent to areas under the curve of 0,871 and 0,857 for 2D and 3D measurements (p = 0,229), respectively. A solid component of 5 mm had a prognostic impact on both measurements (≤ 5 mm versus > 5 mm p = 0,003 for 2D and p = 0,002 for 3D, log rank test). Survival rates at 5 years were 94,7 96,9% following lobectomy and sublobar resection among patients with a solid component ≤ 5 mm in size. Sublobar resection resulted in worse survival rates, with declines at 5 years of 15,8% on 2D and 11,5% on 3D measurements, than lobectomy in patients with a solid component > 5 mm in size.ConclusionsA solid component ≤ 5 mm in size is an appropriate criterion for sublobar resection for both measurements. In addition, 2D measurement is justified because of its simple implementation."

"Penelitian ini bertujuan untuk mengevaluasi perhitungan dosis berdasarkan citra Cone Beam Computed Tomography (CBCT) pada pasien dengan diagnosa tumor otak. Perencanaan dan perhitungan dosis berdasarkan citra CBCT fraksinasi ke-16 yang dilakukan terhadap 13 pasien yang disinari menggunakan pesawat linac Elekta Versa HD dan 7 pasien yang disinari menggunakan pesawat linac Halcyon 2.0. Perencanaan dan perhitungan dosis dilakukan pada Treatment Planning System (TPS) Eclipse dan TPS Monaco. Hasil perhitungan dosis berdasarkan citra CBCT dibandingkan dengan citra Computed Tomography (CT) simulator. Penelitian ini memiliki beberapa tahapan, (1) kalibrasi Hounsfield Unit (HU) citra CBCT menggunakan fantom CIRS CT electron density 062M untuk melakukan perhitungan dosis di TPS dengan nilai HU yang sesuai, (2) proses pengumpulan data citra pasien yang memenuhi kriteria penelitian dan dilanjutkan dengan proses registrasi dan perencanaan citra CBCT, (3) analisis Dose Volume Histogram (DVH) untuk mengevaluasi kualitas perencanaan dengan parameter dosis yaitu Conformity Index (CI) dan Homogeneity Index (HI), (4) analisis dosis Organ at Risk (OAR) terhadap dose-constraint (batas dosis) untuk OAR batang otak, kiasma, sumsum tulang belakang, saraf optik, mata dan lensa. Nilai CI pada perencanaan berdasarkan CT tidak berbeda secara signifikan, Berdasarkan CBCT dari pesawat linac Elekta Versa HD diperoleh CI sebesar 0,05±0,21 (p=0,08) dan -0,01 ± 0,06 (p=0,02) berdasarkan CBCT dari pesawat linac Halcyon 2.0. Sementara itu, nilai HI pada perencanaan berdasarkan CBCT diamati berbeda secara signifikan terhadap CT, Berdasarkan CBCT dari pesawat linac Elekta Versa HD diperoleh HI sebesar 0,25 ± 0,43 (p=0,01) dan 0,08 ± 0,04 (p=0,01) berdasarkan CBCT dari pesawat linac Halcyon 2.0.

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This research aims to evaluate dose calculations based on Cone Beam Computed Tomography (CBCT) images in patients diagnosed with brain tumors. Planning and dose calculations based on the 16th fraction of CBCT images were performed on 13 patients irradiated using Elekta Versa HD linear accelerator and 7 patients irradiated using Halcyon 2.0 linear accelerator. The planning and dose calculations were conducted using the Treatment Planning System (TPS) Eclipse and TPS Monaco. The results of the dose calculations based on CBCT images were compared with the Computed Tomography (CT) simulator images. The research comprised several stages: (1) calibration of Hounsfield Unit (HU) of CBCT images using CIRS CT electron density 062M phantom to perform dose calculations in TPS with appropriate HU values, (2) data collection of patient images meeting the research criteria followed by image registration and CBCT planning, (3) analysis of Dose Volume Histogram (DVH) to evaluate planning quality using dose parameters such as Conformity Index (CI) and Homogeneity Index (HI), (4) analysis of dose to Organs at Risk (OAR) against dose constraints for OARs such as brainstem, chiasm, spinal cord, optic nerves, eyes, and lenses. The CI values for the planning based on CT were not significantly different. Based on CBCT from Elekta Versa HD linear accelerator, the CI obtained was 0.05 ± 0.21 (p=0.08), and based on CBCT from Halcyon 2.0 linear accelerator, the CI obtained was -0.01 ± 0.06 (p=0.02). However, the HI values for planning based on CBCT significantly differed from CT. Based on CBCT from Elekta Versa HD linear accelerator, the HI obtained was 0.25 ± 0.43 (p=0.01), and based on CBCT from Halcyon 2.0 linear accelerator, the HI obtained was 0.08 ± 0.04 (p=0.01)."

"ABSTRAKTujuanPenelitian ini dilakukan untuk mengetahui peran tomografi komputer (CT Scan) tulang temporal dalam mengevaluasi adanya kolesteatoma dan erosi tulang pada kasus-kasus OMSK tipe bahaya serta mendapatkan informasi-informasi yang bermanfaat sehubungan dengan tindakan operasi yang akan dilakukan.MetodePenelitian cross-sectional dengan data prospektif ini menganalisis temuan pemeriksaan tomografi komputerpreoperatif pada 21 pasien OMSK tipe bahaya yang telah didiagnosis secara klinis dan kemudian dinilai kesesuaiannya dengan temuan intraoperatifnya . Data diambil dari Mei 2012 sampai Agustus 2012. Menggunakan tomografi komputer resolusi tinggi (HRCT), tanpa kontras dan potongan yang digunakan aksial dan koronal. Rekonstruksi dilakukan pada irisan 0,6 mm dan 1 mm. Penilaian preoperatif dan intraoperatif meliputi adanya temuan kolesteatoma, erosi pada skutum, osikel, tegmen timpani, kanalis fasialis (pars timpani dan pars mastoid), dinding posterior kavum timpani serta sinus sigmoid. Uji statistik untuk mengetahui kesesuaian antara temuan preoperatif dan temuan intraoperatif menggunakan uji McNemar dan perhitungan nilai Kappa.Hasil dan diskusiKolesteatoma merupakan kelainan yang paling banyak terdeteksi baik dengan irisan 0,6 mm maupun 1 mm, masing-masing didapatkan pada 19 dari 22 sampel telinga dan 18 dari 22 sampel. Urutan kelainan berikutnya yang ditemukan adalah erosi skutum, osikel, dinding posterior kavum timpani, kanalis fasialis, tegmen timpani dan sinus sigmoid. Uji kesesuaian seluruh pemeriksaan preoperatif memakai tomografi komputer dengan irisan 0,6 mm maupun 1 mm dengan temuan intraoperatif memiliki nilai Mc Nemar > 0,05 dan nilai kappa > 0,4. Menandakan adanya kesesuaian yang signifikan antara temuan preoperatif dan intraoperatif.KesimpulanTerdapat kesesuaian antara temuan erosi tulang dan kolesteatom pada tomografi komputer preoperatif dengan temuan operasi otitis media supuratif kronik tipe bahaya. Tingkat kesesuaian antara temuan pemeriksaan preoperatif baik dengan irisan 0,6 mm atau 1 mm dan temuan intraoperatif dinilai tergolong dalam kategori yang cukup baik dan signifikan.

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ABSTRACT

Objectives

To determine the role of temporal bone CT scan in evaluation cholesteatom and bone erosions in malignant CSOM patients and getting the important informations associated to surgery planning.

Methods

It?s a cross-sectional study, data taken prospectively, analyzed preoperative CT scan findings in 21 patients with malignant CSOM diagnosed clinically and planned for surgery. Data was taken from Mei 2012 until Agust 2012. Using High Resolution Computed Tomography (HRCT) without contrast with axial and coronal planes. Reconstructed by 0,6 mm and 1 mm slices. Preoperatif CT scan and intraoperative appraisal consist of cholesteatom, scutum erosions, ossicles, tegmen tympani, facialis canal (tympani and mastoid segment), posterior wall of tympanic cavity and sigmoid sinus findings. Statistical test for determining the suitability between preoperative and intraoperative findings calculated with McNemar and Kappa test.

Results and Discussion

Cholesteatom is the most finding either with 0,6 mm or 1 mm slices, consecutive 19 0f 22 and 18 0f 22. The next sequence pathologic findings are scutum erosion, ossicles, posterior wall of tympanic cavity, fascial canal, tegmen tympani and sigmoid sinus. All suitability test preoperative and intraoperative findings had McNemar value test > 0.05 with the Kappa value test > 0.4. This results indicate the preoperative and intraoperative findings are suitable and significant."

"Dewasa ini, teknologi kedokteran gigi di Indonesia, khususnya di Yogyakarta semakin berkembang dengan sangat pesat. Tindakan medis yang umumnya dilakukan pada kasus impaksi gigi berupa pencabutan terhadap gigi yang impaksi. Sebelum dilakukan pencabutan gigi, pasien akan diminta dokter gigi untuk melakukan pemeriksaan radiografi. Teknologi  radiografi yang saat ini dikenal sebagai pemeriksaan penunjang untuk mendiagnosis impaksi gigi adalah Cone-Beam Computed Tomography dan Panoramik. Tujuan dari penelitian ini adalah mengetahui efektivitas biaya dari dua fasilitas pemeriksaan penunjang, yaitu CBCT dan Panoramik yang dilakukan di RSGM UMY Yogyakarta. Penelitian ini bersifat non eksperimental menggunakan evaluasi ekonomi model cost effectiveness analysis dengan cohort retrospective. Data sekunder yang digunakan dalam penelitian ini adalah rekam medis, dokumen keuangan, dokumen bagian fix asset, dan dokumen pencatatan ruang radiologi di RSGM UMY dari 1 Januari 2021 hingga 31 Desember 2021. Penelitian ini menghitung biaya dari setiap aktivitas menggunakan metode Activity Based Costing. Biaya yang dihitung dalam penelitian ini terdiri dari biaya investasi, biaya pemeliharaan, serta biasanya operasional. Biaya tersebut dihitung sesuai dengan aktivitas yaitu di pendaftaran, poli perawat, poli gigi, poli radiologi, dan kasir. Sedangkan output pada penelitian ini terdapat empat indikator yaitu akurasi radiografi, error rateradiograf, dosis radiasi, dan waktu paparan. Efektivitas yang dihitung dari akurasi radiograf kedua pemeriksaan penunjang. Hasil penelitian memperlihatkan bahwa biaya pemeriksaan CBCT Rp 614.843,4 dan kelompok Panoramik didapatkan hasil yang lebih murah yaitu Rp 333.342,0. Biaya investasi yang memiliki kontribusi adalah biaya investasi di poli gigi yaitu sebesar Rp 89.545,9 baik pada pemeriksaan CBCT maupun Panoramik. Output yang diukur dalam penelitian ini adalah akurasi radiograf, error rate radiograf, dosis radiasi, dan waktu paparan. Namun, untuk mendapatkan nilai efektivitas dilakukan perhitungan akurasi, dimana pada pemeriksaan CBCT didapatkan hasil akurasi sebesar 50% dan persentase akurasi radiografi Panoramik sebesar 90,8%. Panoramik memiliki efektivitas yang lebih baik dari CBCT dan harga yang lebih rendah. Oleh karena itu, radiografi Panoramik pada penelitian ini mendominasi. Sehingga dapat dikatakan Panoramik lebih cost effective dari CBCT. CBCT terbukti tidak cost effective karena memiliki biaya yang lebih tinggi namun efektivitasnya tidak lebih baik. Penelitian ini hanya berfokus pada RSGM UMY. Sampel yang terbatas tidak mencerminkan kondisi pelayanan radiografi gigi secara umum di fasilitas kesehatan lain.

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Today, dental technology in Indonesia, especially in Yogyakarta, is growing very rapidly. The most common medical procedure for impacted teeth is the extraction of the impacted tooth. Prior to tooth extraction, the patient will be asked by the dentist to perform a radiographic examination. Radiographic technology currently known as a supporting examination for diagnosing impacted teeth is Cone-Beam Computed Tomography and Panoramic.

The purpose of this study was to determine the cost-effectiveness of the two supporting examination facilities, namely CBCT and Panoramic which were carried out at RSGM UMY Yogyakarta. This research is non-experimental using an economic evaluation model of cost-effectiveness analysis with a retrospective cohort. The secondary data used in this study are medical records, financial documents, fixed asset section documents, and radiology room recording documents at RSGM UMY from January 1, 2021 to December 31, 2021.

This study calculates the cost of each activity using the Activity Based Costing method. The costs calculated in this study consist of investment costs, maintenance costs, and usually operational costs. The fee is calculated according to the activities, namely at registration, nursing poly, dental poly, radiology poly, and cashier. While the output in this study there are four indicators, namely radiographic accuracy, radiographic error rate, radiation dose, and exposure time. Effectiveness was calculated from the accuracy of the radiographs of both investigations.

The results showed that the cost of the CBCT examination was Rp. 614,843.4 and the panoramic group got cheaper results, which was Rp. 333,342.0. The investment cost that has a contribution is the investment cost in the dental clinic, which is Rp. 89,545.9 for both CBCT and panoramic examinations. The outputs measured in this study were radiographic accuracy, radiographic error rate, radiation dose, and exposure time. However, to get the effectiveness value, an accuracy calculation is carried out, where the CBCT examination results in an accuracy of 50% and the percentage of Panoramic radiography accuracy of 90.8%.

Panoramic has better effectiveness than CBCT and lower cost. Therefore, panoramic radiography in this study dominates. So it can be said that Panorama is more cost effective than CBCT.

CBCT is proven not to be cost effective because it has a higher cost but its effectiveness is not better. This research only focuses on RSGM UMY. The limited sample does not reflect the general condition of dental radiography services in other health facilities."

"Latar belakang dan tujuan: Tuli sensorineural adalah penyebab tuli terbanyak pada anak-anak, akibat gangguan antaran impuls saraf pada koklea. Teknik implann koklea berkembang untuk mengatasi kelainan ini. Tomografi komputer resolusi tinggi memberikan peranan penting untuk mengevaluasi struktur koklea dan mengukur panjang duktus koklea untuk kepentingan pemasangan implan. Pengukuran dengan cara manual memiliki kekurangan waktu pengerjaan yang lama. Terdapat cara pengukuran dengan menggunakan rumus panjang duktus koklea yang dikembangkan oleh salah satu merk implan. Apabila terdapat korelasi antara kedua cara pengukuran tersebut, maka cara pengukuran dengan rumus panjang koklea dapat digunakan secara umum untuk semua merk implan koklea. Metode: Penelitian deskriptif dengan menggunakan uji korelasi pada rerata panjang duktus koklea pasien dengan tuli sensorineural menggunakan pengukuran secara manual dan rumus panjang koklea yang dilakukan pemeriksaan tomografi komputer resolusi tinggi tulang temporal di Departemen Radiologi RSCM terhadap 86 sampel penelitian. Hasil: Dengan uji korelasi Pearson, didapatkan nilai p

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Background and Objective: Sensorineural hearing loss is the most common cause of deafness in children, due to impaired nerve impulses in the cochlea. Cochlear implant technique develops to overcome this disorder. High resolution computed tomography provides an important role in evaluating the cochlear structure and measuring the length of the cochlear ducts for the benefit of implantation. Manual measurements have a short time lapse. There is a method of measurement using the cochlear duct length equation developed by one of the implant brands. If there is a correlation between the two methods of measurement, then the method of measurement by cochlear length equation can be used generally for all brands of cochlear implants

Methods: A Descriptive correlation study of the mean length of the patient 39 s cochlear duct with sensorineural hearing loss using manual measurement and cochlear length equation performed by high resolution computed tomography examination of the temporal bone at Radiology Department of Cipto Mangunkusumo hospital for 86 research samples.

Results: With Pearson correlation test, obtained p value "