- Magnetic Resonance Imaging: Historical Overview, Technical Developments, and Clinical Applications
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Jahng GH, Park S, Ryu CW, Cho ZH
- KMID: 2507477
- Prog Med Phys.
- 2020 Sep;31(3):35-53.
- doi: 10.14316/pmp.2020.31.3.35
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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- Principles and Technical Aspects of Perfusion Magnetic Resonance Imaging
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Jahng GH, Kim HS, Kim SM, Ryu CW
- KMID: 2000057
- J Korean Soc Magn Reson Med.
- 2011 Aug;15(2):91-101.
- doi: 10.13104/jksmrm.2011.15.2.91
No abstract available. -
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- A Unified Gradient Shape on the Slice-Selection Axis for Flow Compensation
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Jahng GH, Pickup S
- KMID: 2206892
- J Korean Soc Magn Reson Med.
- 2006 Dec;10(2):70-80.
Spin echo gradient moment nulling pulse sequences were designed and implemented on a clinical magnetic resonance imaging system. A new technique was introduced for flow compensation that minimized echo time... -
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- Contribution of Microbleeds on Microvascular Magnetic Resonance Imaging Signal
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Yoo CH, Goh J, Jahng GH
- KMID: 2537876
- Prog Med Phys.
- 2022 Dec;33(4):88-100.
- doi: 10.14316/pmp.2022.33.4.88
Purpose: Cerebral microbleeds are more susceptible than surrounding tissues and have been associated with a variety of neurological and neurodegenerative disorders that are indicative of an underlying vascular pathology. We... -
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- Gradient Optimized Gradient-Echo Gradient Moment Nulling Sequences for Flow Compensation of Brain mages
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Jahng GH, Pickup S
- KMID: 2206864
- J Korean Soc Magn Reson Med.
- 2000 Jun;4(1):20-26.
Gradient moment nulling techniques require the introduction of an additional gradient on each axis for each order of motion correction to be applied. The additional gradients introduce new constraints on... -
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- Amide Proton Transfer Imaging in Clinics: Basic Concepts and Current and Future Use in Brain Tumors and Stroke
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Park JE, Jahng GH, Jeong HK
- KMID: 2360429
- J Korean Soc Radiol.
- 2016 Dec;75(6):419-433.
- doi: 10.3348/jksr.2016.75.6.419
Amide proton transfer (APT) imaging is gaining attention as a relatively new in vivo molecular imaging technique that has higher sensitivity and spatial resolution than magnetic resonance spectroscopy imaging. APT... -
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- High-Resolution MRI of Intracranial Atherosclerotic Disease
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Ryu CW, Kwak HS, Jahng GH, Lee HN
- KMID: 1910769
- Neurointervention.
- 2014 Feb;9(1):9-20.
- doi: 10.5469/neuroint.2014.9.1.9
Intracranial atherosclerotic disease (ICAD) causes up to 10% of all ischemic strokes, and the rate of recurrent vascular ischemic events is very high. Important predictors of vulnerability in atherosclerotic plaques... -
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- Effects of the Variability of Individual Data on the Group Results; an Acupuncture Study Using fMRI
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Bae SI, Jahng GH, Ryu CW, Lim S
- KMID: 1989084
- Korean J Med Phys.
- 2009 Dec;20(4):277-289.
Recently, functional MRI has been used to investigate the neurobiological mechanisms of acupuncture and the specificity of acupoint. The group data tend to be regarded as more important than the... -
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- Practical Considerations of Arterial Spin Labeling MRI for Measuring the Multi-slice Perfusion in the Human Brain
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Jahng GH
- KMID: 1512451
- Korean J Med Phys.
- 2007 Mar;18(1):35-41.
In this work practical considerations of a pulsed arterial spin labeling MRI are presented to reliable multi-slice perfusion measurements in the human brain. Three parameters were considered in this study.... -
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- Assessment of Non-permeability of Gd-DTPA for Dynamic Susceptibility Contrast in Human Brain: A Preliminary Study Using Non-linear Curve Fitting
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Yoon SI, Jahng GH, Khang HS, Kim YJ, Choe BY
- KMID: 2206901
- J Korean Soc Magn Reson Med.
- 2007 Dec;11(2):103-109.
To develop an advanced non-linear curve fitting (NLCF) algorithm for performing dynamic susceptibility contrast study of the brain. The first pass effects give rise to spuriously high estimates of Ktrans... -
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- Multi-slice Multi-echo Pulsed-gradient Spin-echo (MePGSE) Sequence for Diffusion Tensor Imaging MRI: A Preliminary Result
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Jahng GH, Pickup S
- KMID: 1512440
- Korean J Med Phys.
- 2007 Jun;18(2):65-72.
An echo planar imaging (EPI)-based spin-echo sequence is often used to obtain diffusion tensor imaging (DTI) data on most of the clinical MRI systems. However, this sequence is confounded with... -
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- Value of Perfusion Weighted Magnetic Resonance Imaging in the Diagnosis of Supratentorial Anaplastic Astrocytoma
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Lee KM, Kim EJ, Jahng GH, Park BJ
- KMID: 2339968
- J Korean Neurosurg Soc.
- 2014 Sep;56(3):261-264.
- doi: 10.3340/jkns.2014.56.3.261
We report perfusion weighted imaging (PWI) findings of nonenhanced anaplastic astrocytoma in a 30-year-old woman. Brain magnetic resonance imaging showed a nonenhanced brain tumor with mild peritumoral edema on the... -
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- Investigation of Varied MR Spectra by TE and Metabolite Amount in the Localized Voxel using the MR Cone-shape Phantom
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Woo DC, Kim SS, Rhim HS, Jahng GH, Choe BY
- KMID: 2244004
- Korean J Med Phys.
- 2007 Sep;18(3):179-185.
The purpose of this study is to investigate the spectra of a magnetic resonance spectroscopy (MRS) in accordance with the variance of TE and the volumes of metabolites in a... -
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- Voxel-based Investigations of Phase Mask Effects on Susceptibility Weighted Images
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Hwang EJ, Kim MJ, Kim HG, Ryu CW, Jahng GH
- KMID: 2315741
- Prog Med Phys.
- 2013 Mar;24(1):25-34.
To investigate effects of phase mask on susceptibility-weighted images (SWI) using voxel-based analyses in normal elderly subjects. A three-dimensional (3D) gradient echo sequence ran to obtain SWIs in 20 healthy... -
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- Investigation of Correlations of Double Inversion Recovery and MR Spectroscopy on Breast MR Imaging
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Ryu JK, Rhee SJ, Jahng GH
- KMID: 1683778
- J Korean Soc Magn Reson Med.
- 2014 Mar;18(1):34-42.
- doi: 10.13104/jksmrm.2014.18.1.34
PURPOSE: To evaluate the correlation of lesion-to-normal ratio (LNR) of signal intensity from double inversion recovery MR imaging and total choline-containing compound (tCho) resonance from single voxel MR spectroscopy in... -
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- Simulations of Perfusion Signals of Pulsed Arterial Spin Labeling MRI
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Kim HG, Jahng GH, Oh CH
- KMID: 2000047
- J Korean Soc Magn Reson Med.
- 2011 Dec;15(3):191-199.
- doi: 10.13104/jksmrm.2011.15.3.191
PURPOSE: A pulsed arterial spin labeling (PASL) signal usually depends on several parameters. The objective of this study was to determine the optimal parameters using simulation for perfusion signals of... -
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- Perfusion Magnetic Resonance Imaging: A Comprehensive Update on Principles and Techniques
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Jahng GH, Li KL, Ostergaard L, Calamante
- KMID: 1734941
- Korean J Radiol.
- 2014 Oct;15(5):554-577.
- doi: 10.3348/kjr.2014.15.5.554
Perfusion is a fundamental biological function that refers to the delivery of oxygen and nutrients to tissue by means of blood flow. Perfusion MRI is sensitive to microvasculature and has... -
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- Inter-Vendor and Inter-Session Reliability of Diffusion Tensor Imaging: Implications for Multicenter Clinical Imaging Studies
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Min J, Park M, Choi JW, Jahng GH, Moon WJ
- KMID: 2413707
- Korean J Radiol.
- 2018 Aug;19(4):777-782.
- doi: 10.3348/kjr.2018.19.4.777
OBJECTIVE: To evaluate the inter-vendor and inter-session reliability of diffusion tensor imaging (DTI) and relevant parameters. MATERIALS AND METHODS: This prospective study included 10 healthy subjects (5 women and 5 men;... -
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- Magnetic Resonance Findings in Two Episodes of Repeated Cerebral Fat Embolisms in a Patient with Autologous Fat Injection into the Face
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Lee KM, Kim EJ, Jahng GH, Chang DI
- KMID: 2066934
- J Korean Neurosurg Soc.
- 2012 May;51(5):312-315.
- doi: 10.3340/jkns.2012.51.5.312
We report magnetic resonance image (MRI) and magnetic resonance spectroscopy (MRS) findings in a patient of cerebral fat embolism (CFE) occurred in a 26-year-old woman after an autologous fat injection... -
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- b0 Dependent Neuronal Activation in the Diffusion-Based Functional MRI
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Kim HG, Jahng GH
- KMID: 2442418
- Prog Med Phys.
- 2019 Mar;30(1):22-31.
- doi: 10.14316/pmp.2019.30.1.22
PURPOSE: To develop a new diffusion-based functional MRI (fMRI) sequence to generate apparent diffusion coefficient (ADC) maps in single excitation and evaluate the contribution of b0 signal on neuronal changes. MATERIALS... -
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