Index by author
Kim, H.-J.
- Head and Neck ImagingYou have accessMelanoma of the Sinonasal Tract: Value of a Septate Pattern on Precontrast T1-Weighted MR ImagingY.-K. Kim, J.W. Choi, H.-J. Kim, H.Y. Kim, G.M. Park, Y.-H. Ko, J. Cha and S.T. KimAmerican Journal of Neuroradiology April 2018, 39 (4) 762-767; DOI: https://doi.org/10.3174/ajnr.A5539
Kim, H.Y.
- Head and Neck ImagingYou have accessMelanoma of the Sinonasal Tract: Value of a Septate Pattern on Precontrast T1-Weighted MR ImagingY.-K. Kim, J.W. Choi, H.-J. Kim, H.Y. Kim, G.M. Park, Y.-H. Ko, J. Cha and S.T. KimAmerican Journal of Neuroradiology April 2018, 39 (4) 762-767; DOI: https://doi.org/10.3174/ajnr.A5539
Kim, S.H.
- FELLOWS' JOURNAL CLUBAdult BrainOpen AccessWhole-Tumor Histogram and Texture Analyses of DTI for Evaluation of IDH1-Mutation and 1p/19q-Codeletion Status in World Health Organization Grade II GliomasY.W. Park, K. Han, S.S. Ahn, Y.S. Choi, J.H. Chang, S.H. Kim, S.-G. Kang, E.H. Kim and S.-K. LeeAmerican Journal of Neuroradiology April 2018, 39 (4) 693-698; DOI: https://doi.org/10.3174/ajnr.A5569
Ninety-three patients with World Health Organization grade II gliomas with known IDH-mutation and 1p/19q-codeletion status (18 IDH1 wild-type, 45 IDH1-mutant and no 1p/19q codeletion, 30 IDH-mutant and 1p/19q codeleted tumors) underwent DTI. ROIs were drawn on every section of the T2-weighted images and transferred to the ADC and the fractional anisotropy maps to derive volume-based data of the entire tumor. Histogram and texture analyses were correlated with the IDH1-mutation and 1p/19q-codeletion status. Various histogram and texture parameters differed significantly according to IDH1-mutation and 1p/19q-codeletion status. The skewness and energy of ADC, fractional anisotropy 10th and 25th percentiles, and correlation of fractional anisotropy were independent predictors of an IDH1 wild-type in the least absolute shrinkage and selection operator. The authors conclude that whole-tumor histogram and texture features of the ADC and fractional anisotropy maps are useful for predicting the IDH1-mutation and 1p/19q-codeletion status in World Health Organization grade II gliomas.
Kim, S.T.
- Head and Neck ImagingYou have accessMelanoma of the Sinonasal Tract: Value of a Septate Pattern on Precontrast T1-Weighted MR ImagingY.-K. Kim, J.W. Choi, H.-J. Kim, H.Y. Kim, G.M. Park, Y.-H. Ko, J. Cha and S.T. KimAmerican Journal of Neuroradiology April 2018, 39 (4) 762-767; DOI: https://doi.org/10.3174/ajnr.A5539
Kim, Y.-K.
- Head and Neck ImagingYou have accessMelanoma of the Sinonasal Tract: Value of a Septate Pattern on Precontrast T1-Weighted MR ImagingY.-K. Kim, J.W. Choi, H.-J. Kim, H.Y. Kim, G.M. Park, Y.-H. Ko, J. Cha and S.T. KimAmerican Journal of Neuroradiology April 2018, 39 (4) 762-767; DOI: https://doi.org/10.3174/ajnr.A5539
Kleinloog, R.
- EDITOR'S CHOICEADULT BRAINOpen AccessQuantification of Intracranial Aneurysm Volume Pulsation with 7T MRIR. Kleinloog, J.J.M. Zwanenburg, B. Schermers, E. Krikken, Y.M. Ruigrok, P.R. Luijten, F. Visser, L. Regli, G.J.E. Rinkel and B.H. VerweijAmerican Journal of Neuroradiology April 2018, 39 (4) 713-719; DOI: https://doi.org/10.3174/ajnr.A5546
Tenunruptured aneurysms in 9 patients were studied using a high-resolution 3D gradient-echo sequence with cardiac gating. Semiautomatic segmentation was used to measure aneurysm volume per cardiac phase. Aneurysm pulsation was defined as the relative increase in volume between the phase with the smallest volume and the phase with the largest volume. The accuracy and precision of the measured volume pulsations were addressed by digital phantom simulations and a repeat image analysis. In Stage II, the imaging protocol was optimized and 9 patients with 9 aneurysms were studied with and without administration of a contrast agent. Mean aneurysm pulsation in Stage I was 8%, with a mean volume change of 15 mm3. The artifactual volume pulsations measured with the digital phantom simulations were of the same magnitude as the volume pulsations observed in the patient data. Volume pulsation quantification with the current imaging protocol on 7T MR imaging is not accurate due to multiple imaging artifacts.
Ko, Y.-H.
- Head and Neck ImagingYou have accessMelanoma of the Sinonasal Tract: Value of a Septate Pattern on Precontrast T1-Weighted MR ImagingY.-K. Kim, J.W. Choi, H.-J. Kim, H.Y. Kim, G.M. Park, Y.-H. Ko, J. Cha and S.T. KimAmerican Journal of Neuroradiology April 2018, 39 (4) 762-767; DOI: https://doi.org/10.3174/ajnr.A5539
Kolakowsky-hayner, S.
- Adult BrainOpen AccessBrain Injury Lesion Imaging Using Preconditioned Quantitative Susceptibility Mapping without Skull StrippingS. Soman, Z. Liu, G. Kim, U. Nemec, S.J. Holdsworth, K. Main, B. Lee, S. Kolakowsky-Hayner, M. Selim, A.J. Furst, P. Massaband, J. Yesavage, M.M. Adamson, P. Spincemallie, M. Moseley and Y. WangAmerican Journal of Neuroradiology April 2018, 39 (4) 648-653; DOI: https://doi.org/10.3174/ajnr.A5550
Kolb, C.
- Adult BrainYou have accessEvaluation of Leptomeningeal Contrast Enhancement Using Pre-and Postcontrast Subtraction 3D-FLAIR Imaging in Multiple SclerosisR. Zivadinov, D.P. Ramasamy, J. Hagemeier, C. Kolb, N. Bergsland, F. Schweser, M.G. Dwyer, B. Weinstock-Guttman and D. HojnackiAmerican Journal of Neuroradiology April 2018, 39 (4) 642-647; DOI: https://doi.org/10.3174/ajnr.A5541
Krikken, E.
- EDITOR'S CHOICEADULT BRAINOpen AccessQuantification of Intracranial Aneurysm Volume Pulsation with 7T MRIR. Kleinloog, J.J.M. Zwanenburg, B. Schermers, E. Krikken, Y.M. Ruigrok, P.R. Luijten, F. Visser, L. Regli, G.J.E. Rinkel and B.H. VerweijAmerican Journal of Neuroradiology April 2018, 39 (4) 713-719; DOI: https://doi.org/10.3174/ajnr.A5546
Tenunruptured aneurysms in 9 patients were studied using a high-resolution 3D gradient-echo sequence with cardiac gating. Semiautomatic segmentation was used to measure aneurysm volume per cardiac phase. Aneurysm pulsation was defined as the relative increase in volume between the phase with the smallest volume and the phase with the largest volume. The accuracy and precision of the measured volume pulsations were addressed by digital phantom simulations and a repeat image analysis. In Stage II, the imaging protocol was optimized and 9 patients with 9 aneurysms were studied with and without administration of a contrast agent. Mean aneurysm pulsation in Stage I was 8%, with a mean volume change of 15 mm3. The artifactual volume pulsations measured with the digital phantom simulations were of the same magnitude as the volume pulsations observed in the patient data. Volume pulsation quantification with the current imaging protocol on 7T MR imaging is not accurate due to multiple imaging artifacts.
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