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Magnetic Resonance Imaging: Historical Overview, Technical Developments, and Clinical Applications

Jahng GH, Park S, Ryu CW, Cho ZH

The authors congratulate the cerebrations for the 30 years of the Korean Society of Medical Physics (http://www.ksmp.or.kr/). The paper is published to recognize the anniversary. Geon-Ho Jahng invited Professor Z....
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Structural and Functional Alterations at Pre-Epileptic Stage Are Closely Associated with Epileptogenesis in Pilocarpine-induced Epilepsy Model

Kim H, Choi Y, Joung HY, Choi YS, Kim HJ, Joo Y, Oh JH, Hann HJ, Cho ZH, Lee HW

Pilocarpine-induced rat epilepsy model is an established animal model that mimics medial temporal lobe epilepsy in humans. The purpose of this study was to investigate neuroimaging abnormalities in various stages...
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Review of Recent Advancement of Ultra High Field Magnetic Resonance Imaging: from Anatomy to Tractography

Cho ZH

PURPOSE: Advances of magnetic resonance imaging (MRI), especially that of the Ultra-High Field (UHF) MRI will be reviewed. MATERIALS AND METHODS: Diffusion MRI data was obtained from a healthy adult young...
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Experience with 7.0 T MRI in Patients with Supratentorial Meningiomas

Song SW, Son YD, Cho ZH, Paek SH

Meningiomas are typically diagnosed by their characteristic appearance on conventional magnetic resonance imaging (MRI). However, detailed image findings regarding peri- and intra-tumoral anatomical structures, tumor consistency and vascularity are very...
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Basal Forebrain Cholinergic Deficits Reduce Glucose Metabolism and Function of Cholinergic and GABAergic Systems in the Cingulate Cortex

Jeong DU, Oh JH, Lee JE, Lee J, Cho ZH, Chang JW, Chang WS

PURPOSE: Reduced brain glucose metabolism and basal forebrain cholinergic neuron degeneration are common features of Alzheimer's disease and have been correlated with memory function. Although regions representing glucose hypometabolism in...
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Contrast-enhanced Magnetic Resonance Imaging of Brain Metastases at 7.0T versus 1.5T: A Preliminary Result

Paek SH, Kim JH, Choi SH, Yoon TJ, Son YD, Kim DG, Cho ZH, Sohn CH

PURPOSE: To compare the depiction of brain metastases on contrast-enhanced images with 7.0 tesla (T) and at 1.5T MRI. MATERIALS AND METHODS: Four consecutive patients with brain metastases were scanned on...
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A Case Report of Preoperative and Postoperative 7.0T Brain MRI in a Patient with a Small Cell Glioblastoma

Paek SH, Hwang JH, Kim DG, Choi SH, Sohn CH, Park SH, Son YD, Kim YB, Cho ZH

A 45-yr-old female patient was admitted with one-month history of headache and progressive left hemiparesis. Brain magnetic resonance imaging (MRI) demonstrated a mass lesion in her right frontal lobe. Her...
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Neural Substrates of Hanja (Logogram) and Hangul (Phonogram) Character Readings by Functional Magnetic Resonance Imaging

Cho ZH, Kim N, Bae S, Chi JG, Park CW, Ogawa S, Kim YB

The two basic scripts of the Korean writing system, Hanja (the logography of the traditional Korean character) and Hangul (the more newer Korean alphabet), have been used together since the...
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Early Experience of Pre- and Post-Contrast 7.0T MRI in Brain Tumors

Paek SL, Chung YS, Paek SH, Hwang JH, Sohn CH, Choi SH, Son YD, Kim YB, Kim DG, Lee KH, Cho ZH

We investigated the safety and clinical applicability of 7.0 Tesla (T) brain magnetic resonance imaging (MRI) in patients with brain tumors. Twenty-four patients with intraaxial or extraaxial brain tumors were...
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Anterior Commissure - Posterior Commissure Revisited

Choi SH, Chi JG, Kim YB, Cho ZH

OBJECTIVE: The anterior commissure (AC) and posterior commissure (PC) are the two distinct anatomic structures in the brain which are difficult to observe in detail with conventional MRI, such as...
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Improvement of a 4-Channel Spiral-Loop RF Coil Array for TMJ MR Imaging at 7T

Kim KN, Kim YB, Cho ZH

PURPOSE: In an attempt to further improve the radiofrequency (RF) magnetic (B1) field strength in temporomandibular joint (TMJ) imaging, a 4-channel spiral-loop coil array with RF circuitry was designed and...
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Magnetic Resonance Imaging Compatibility of the Polymer-based Cochlear Implant

Kim JH, Min KS, An SK, Jeong JS, Jun SB, Cho MH, Son YD, Cho ZH, Kim SJ

  • KMID: 2278543
  • Clin Exp Otorhinolaryngol.
  • 2012 Apr;5(Suppl 1):S19-S23.
OBJECTIVES: In this study, we compared the magnetic resonance (MR) image artifacts caused by a conventional metal-based cochlear implant and a newly developed liquid crystal polymer (LCP)-based device. METHODS: The metal-based...
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Clinical Application of 7.0 T Magnetic Resonance Images in Gamma Knife Radiosurgery for a Patient with Brain Metastases

Paek SH, Son YD, Chung HT, Kim DG, Cho ZH

In the study we assessed the distortion of 7.0 T magnetic resonance (MR) images in reference to 1.5 T MR images in the radiosurgery of metastatic brain tumors. Radiosurgery with...
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Deep Brain Stimulation: Technology at the Cutting Edge

Shah RS, Chang SY, Min HK, Cho ZH, Blaha CD, Lee KH

Deep brain stimulation (DBS) surgery has been performed in over 75,000 people worldwide, and has been shown to be an effective treatment for Parkinson's disease, tremor, dystonia, epilepsy, depression, Tourette's...
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A Proposal of New Reference System for the Standard Axial, Sagittal, Coronal Planes of Brain Based on the Serially-Sectioned Images

Park JS, Chung MS, Park HS, Shin DS, Har DH, Cho ZH, Kim YB, Han JY, Chi JG

Sectional anatomy of human brain is useful to examine the diseased brain as well as normal brain. However, intracerebral reference points for the axial, sagittal, and coronal planes of brain...
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New Trend of Pain Study by Brain Imaging Devices

Bai SJ, Cho ZH, Lee BH

The study of pain has recently received much attention, especially in understanding its neurophysiology by using new brain imaging techniques, such as positron emission tomography (PET) and functional magnetic resonance...
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Canine model of ischemic stroke with permanent middle cerebral artery occlusion: clinical and histopathological findings

Kang BT, Lee JH, Jung DI, Park C, Gu SH, Jeon HW, Jang DP, Lim CY, Quan FS, Kim YB, Cho ZH, Woo EJ, Park HM

The aim of the present study was to assess the clinical and histopathological findings in a canine model of ischemic stroke. Cerebral ischemic stroke was induced by middle cerebral artery...
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fMRI of Visual and Motor Stimuli: Difference of Total Activation Depends on Stimulation Paradigm

Chung SC, Song IC, Chang KH, YU BK, Mun CW, Cho ZH

  • KMID: 2099794
  • J Korean Soc Magn Reson Med.
  • 1999 Mar;3(1):41-46.
PURPOSE:To investigate the difference of total activation in visual area, motor area, and cerebellum according to the stimulation paradigm. MATERIALS AND METHODS: Functional MR imaging was performed in 5 healthy...
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The Influence of MR Gradient Aeoustic Noise on fMRI

Chung SC, Mun CW, Park SH, Cho ZH

  • KMID: 2206852
  • J Korean Soc Magn Reson Med.
  • 1998 Jun;2(1):50-57.
MR acoustic sound or noise due to gradient pulsings has been one of the problems in MRI, both in patient scanning as well as in many areas of psychiatric and...
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Quantitative Analysis of Susceptibility Effects in TRFGE and CGE Sequences for Functional MRI

Chung SC, Ro YM, Cho ZH

  • KMID: 1540731
  • J Korean Soc Magn Reson Med.
  • 1997 Dec;1(1):66-74.
fMRI, functional MRI introduced receently appears based on the gradient echo technique which is sensitive to the field inhomogeneity developed due to the local susceptibility changes of blood oxygenation and...
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