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"Comprehensive guide to diagnosis and management of neurological infectious diseases using MRI. Begins with introduction to tropical diseases of the central nervous system, and their epidemiology, then technique of MRI, and its use for infectious and noninfectious conditions."

"Magnetic Resonance Imaging (MRI) saat ini sedang banyak digunakan sebagai image guiding dalam perencanaan radiosurgery dan radioterapi. Modalitas pencitraan ini dapat menampilkan karakteristik fisis jaringan dengan detail luar biasa, terutama pada otak. Namun seperti yang telah diketahui, distorsi geometri terjadi pada citra MRI. Distorsi ini menimbulkan masalah di beberapa aplikasi MRI, salah satunya lokalisasi pada Gamma Knife Stereotactic Radiosurgery (GKSRS). Oleh karena itu, pengukuran serta koreksi distorsi geometri pada citra MRI perlu dilaksanakan. Dalam penelitian ini, sebuah fantom desain khusus dikembangkan untuk mengukur tidak hanya distorsi geometri citra MRI, namun juga uniformitas dan resolusi spasial kontras tinggi. Penelitian menggunakan tiga variasi, meliputi variasi protokol pemindaian, frame, dan larutan pengisi. Protokol pemindaian yang digunakan adalah T1-Bravo dan T2-Fiesta. Fantom dengan dan tanpa Leksell stereotactic frame dipindai menggunakan 1,5 T MRI GE Optima MR450w. Fantom diisi dengan tiga variasi larutan yaitu aquades (H2O) serta CuSO4.5H2O dengan konsentrasi 2 mM dan 5 mM. Dari hasil analisis data penelitian dapat ditarik beberapa kesimpulan bahwa fantom desain khusus yang dikembangkan dapat digunakan untuk mengukur distorsi geometri, uniformitas, serta resolusi spasial kontras tinggi citra MRI. Citra MRI yang dihasilkan oleh protokol pemindaian T1-Bravo memiliki distorsi geometri dan resolusi spasial lebih rendah namun uniformitas lebih tinggi dibandingkan citra yang dihasilkan oleh protokol T2-Fiesta. Keberadaan Leksell stereotactic frame ketika proses pemindaian meningkatkan distorsi geometri dan mengurangi uniformitas citra. Selain itu, larutan yang paling sesuai digunakan sebagai pengisi fantom desain khusus adalah larutan CuSO4.5H2O dengan konsentrasi 5 mM.

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Magnetic Resonance Imaging (MRI) is increasingly being used for purposes of radiosurgery and radiotherapy planning. This imaging modality can explore the physical properties of tissue with great details, especially for imaging of the brain. However, the geometric distortion is reasonably occurred and can make significant differences in certain MR application such as, for example, stereotactic localization in Gamma Knife. Therefore, the geometric distortion measurement and correction should be applied.

In this study, an MRI in-house phantom was developed to measure not only geometric distortion, but also uniformity and high contrast spatial resolution of MR image. This study used three variations, including scanning protocol, frame, and phantom filler. There were two scanning protocols applied in this study, they were T1-Bravo and T2-Fiesta. The phantom attached with Leksell stereotactic frame was scanned using 1.5 T MRI GE Healthcare. Phantom was filled with three kinds of solution, they were pure water (H2O), CuSO4.5H2O 2 mM and 5 mM solution.

The study results showed that the in-house or special design phantom can be used to measure geometric distortion, uniformity, and high contrast spatial resolution of MR image. T1-Bravo image had lower geometric distortion and spatial resolution but higher uniformity than T2-Fiesta. Leksell stereotactic frame can increase the magnitude of geometric distortion and decrease the uniformity of MR image. Moreover, the most suitable solution for phantom filler is CuSO4.5H2O 5 mM."

"Magnetic resonance angiography : principles and applications is a comprehensive text covering magnetic resonance angiography (MRA) in current clinical use. The first part of the book focuses on techniques, with chapters on contrast-enhanced MRA, time of flight, phase contrast, time-resolved angiography, and coronary MRA, as well as several chapters devoted to new non-contrast MRA techniques. Additionally, chapters describe in detail specific topics such as high-field MRA, susceptibility-weighted imaging, acceleration strategies such as parallel imaging, vessel wall imaging, targeted contrast agents, and low dose contrast-enhanced MRA. The second part of the book covers clinical applications of MRA, with each chapter describing the MRA techniques and protocols for a particular disease and vascular territory, as well as the pathology and imaging findings relevant to the disease state being discussed."

"Latar Belakang: Telah diketahui infeksi COVID-19 dapat menetap menjadi sindroma pasca COVID-19. Magnetic Resonance Imaging (MRI) kardiak memiliki nilai diagnostik tinggi untuk menilai karakteristik jaringan miokard. Belum diketahui secara pasti efek jangka panjang COVID-19 terhadap jaringan miokardium serta faktor-faktor admisi yang memiliki pengaruh terhadap prevalensi sindroma pasca-COVID-19 pada populasi dengan penyakit kardiovaskular. Tujuan: Mengevaluasi prevalensi fibrosis miokardium dengan MRI kardiak pada pasien dengan penyakit kardiovaskular dan riwayat COVID-19 1 tahun pascaperawatan, serta mengidentifikasi faktor admisi yang berpengaruh terhadap fibrosis miokardium. Metode: Kohort prospektif dengan menilai parameter MRI kardiak pada pasien terkonfirmasi COVID-19 dengan penyakit kardiovaskular 1 tahun pascaperawatan. Selanjutnya, dilakukan analisa temuan MRI kardiak terhadap kelompok kontrol tanpa riwayat COVID-19 yang telah di-matching berdasarkan umur, jenis kelamin, dan faktor resiko. Analisa multivariat dilakukan untuk mengetahui faktor admisi yang memiliki hubungan dengan kejadian fibrosis miokardium. Hasil: Total 32 subjek dengan penyakit KV dan riwayat COVID-19 1 tahun pascaperawatan dengan 49 subjek kontrol disertakan dalam studi ini. Terdapat peningkatan yang signifikan pada parameter MRI kardiak yaitu proporsi abnormal T1 relaxation time (65,5% vs 36,7%; p-value=0,011) serta late gadolinum enhancement (LGE) skar noniskemik 62,5% vs 29,8%;p-value=<0,001) pada kelompok dengan riwayat COVID-19 dibanding kontrol. Tidak ditemukan faktor admisi yang berpengaruh terhadap peningkatan LGE noniskemik/T1 abnormal. Kesimpulan: Terdapat peningkatan prevalensi fibrosis miokardium pada pasien dengan penyakit KV dan riwayat COVID-19 1 tahun pascaperawatan dibanding kontrol dinilai melalui MRI kardiak. Tidak terdapat hubungan antara faktor admisi dengan fibrosis miokardium 1 tahun pascaperawatan COVID-19.

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Background: Presently, it has been acknowledged that COVID-19 infection may persist longer as Post-acute COVID-19 Syndrome. Cardiac Magnetic Resonance Imaging (cMRI) possesses a high diagnostic value to evaluate myocardial tissue characteristics. Data are still limited regarding longer implications of COVID-19 infection towards myocardial tissues and predictive admission factors in patients with Cardiovascular Diseases (CVD).

Aim(s): To evaluate the prevalences of myocardial fibrosis using cMRI in patients with CVD and one year post-COVID-19 hospitalization and identifying admission factors in correlation with myocardial fibrosis. 

Method(s): Prospective cohort to assess cMRI parameters in patients with CVD and history of COVID-19 one year post-hospitalization. The results were then compared with the age-, sex-, risk factors-matched control group without prior of COVID-19 infection. Lastly, multivariat analysis was done to identify relations between admission factors and myocardial fibrosis. 

Result(s): A total of 32 subjects with CVD one year post-COVID-19 hospitalization and 49 controls were included in this study. Significant increases of cMRI parameters, namely abnormal T1 relaxation time (65.5% vs 36.7%; p-value=0.011) and non-ischemic late gadolinum enhancement (LGE) (62.5% vs 29.8%;p-value=<0.001) were observed in the population with prior COVID-19 infection compared to control. No admission factors were found to be related with the increases in nonischemic LGE/abnormal T1.

Conclusion: There is a significant increase of myocardial fibrosis prevalence in patients with CVD one year post-COVID-19 hospitalization compared to control assessed through cMRI parameters. No relationships were found between admission factors and myocardial fibrosis. "

"The idea of using the enormous potential of magnetic resonance imaging (MRI) not only for diagnostic but also for interventional purposes may seem obvious, but it took major efforts by engineers, physicists, and clinicians to come up with dedicated interventional techniques and scanners, and improvements are still ongoing. Since the inception of interventional MRI in the mid-1990s, the numbers of settings, techniques, and clinical applications have increased dramatically. This state of the art book covers all aspects of interventional MRI. The more technical contributions offer an overview of the fundamental ideas and concepts and present the available instrumentation. The richly illustrated clinical contributions, ranging from MRI-guided biopsies to completely MRI-controlled therapies in various body regions, provide detailed information on established and emerging applications and identify future trends and challenges."

"ABSTRAKLatar Belakang: Disfungsi sistolik ventrikel kiri memiliki prognosis yang buruk dan sekitar 60% dapat asimptomatik. Penilaian kondisi disfungsi sistolik ventrikel kiri ini dapat diketahui dengan mengukur fraksi ejeksi ventrikel kiri (leftventricular fraction ejection/LVEF) dengan menggunakan pemeriksaan cardiac magnetic resonance (CMR), sedangkan cardiothoracic ratio (CTR) memiliki sensitivitas 86% untuk mendeteksi penurunan fraksi ejeksi (< 50%).Tujuan: Mengetahui adakah hubungan korelasi CTR dengan LVEF pada pasien gagal jantung disfungsi sistolik ventrikel kiri. Metode: Menggunakan desain korelatif studi potong lintang (cross sectional) dan retrospektif dengan minimal sampel 47 pasien. Analisis data menggunakan uji korelasi dan regresi. Hasil: Didapatkan korelasi negatif antara CTR dan LVEF dengan r = -0,20 dan  p = 0,170. Kesimpulan: Terdapat hubungan yang tidak bermakna antara CTR dan LVEF.

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ABSTRACTBackground: Left ventricular systolic dysfunction has a poor prognosis and about 60% can be asymptomatic. Assessment of left ventricular systolic dysfunction condition can be determined by measuring left ventricular fraction ejection (LVEF) by cardiac magnetic resonance (CMR) examination, while cardiothoracic ratio (CTR) has 86% sensitivity to detect decreased ejection fraction (< 50%). Purpose: To knowing correlation relationship of CTR with LVEF in patients with heart failure left ventricular systolic dysfunction. Methods: Using correlative design of cross sectional and retrospective studies with a minimum sample of 47 patients. Data analysis using correlation and regression test. Result: There was a negative correlation relationship between CTR and LVEF with r = -0.20 and p = 0.170. Conclutions: Correlations with no significans between CTR and LVEF.

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"The neurologic diagnosis : a practical bedside approach is an introductory text that simplifies the often unwieldy method of making a neurologic diagnosis. Medical students are often intimidated by a deluge of data, extensive differential diagnoses, and have no organizational structure to follow. Diagnostic techniques of general medicine are not applicable. Neurology is a unique specialty since it requires the intermediary step of an anatomic diagnosis prior to proffering a differential diagnosis. Yet the required knowledge of neuroanatomy need not be profound for the student who will specialize in any field other than neurology and neurosurgery. This text is directed to medical students and residents who will all be regularly faced with numerous patients who have neurologic symptomatology. Typical one-month neurology rotations out of four years of medical school is clearly inadequate training to make a cogent neurologic diagnosis, especially since subsequent instruction is commonly provided by upper level residents who have the same background and numerous misconceptions. This is not a comprehensive text. The emphasis in this concise and practical title is on establishing a neuroanatomic diagnosis before formulating a differential diagnosis. In addition, treatment is seldom discussed since it is likely to change radically over time. Focused and succinct."

"This book is a unique resource that will help pediatric radiologists, pediatricians, and pediatric endocrinologists to optimize the work-up and treatment of pediatric patients with endocrine disorders. Acclaimed experts in the field present and discuss the imaging findings obtained in disorders of the various endocrine systems, including the hypothalamo-pituitary axis, the thyroid and parathyroids, the adrenals, and the pancreas. Detailed advice is also provided on the assessment of bone growth and on imaging of the fetal glands, ambiguous genitalia, and the female pelvis in the context of precocious puberty. Throughout, care is taken to highlight characteristic findings and diagnostic clues. All of the currently used imaging techniques are covered, with clear explanation of their benefits and limitations. The informative text is supported by a wealth of high-quality illustrations, the large majority of them in color."