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Published in: Journal of Neuro-Oncology 1/2012

01-03-2012 | Laboratory Investigation - Human/Animal Tissue

Evaluation of radiation necrosis and malignant glioma in rat models using diffusion tensor MR imaging

Authors: Silun Wang, Yifei Chen, Bachchu Lal, Eric Ford, Erik Tryggestad, Michael Armour, Kun Yan, John Laterra, Jinyuan Zhou

Published in: Journal of Neuro-Oncology | Issue 1/2012

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Abstract

Standard MRI cannot distinguish between radiation necrosis and tumor progression; however, this distinction is critical in the assessment of tumor response to therapy. In this study, one delayed radiation necrosis model (dose, 40 Gy; radiation field, 10 × 10 mm2; n = 13) and two orthotopic glioma models in rats (9L gliosarcoma, n =8; human glioma xenografts, n = 5) were compared using multiple diffusion tensor imaging (DTI) indices. A visible isotropic apparent diffusion coefficient (ADC) pattern was observed in the lesion due to radiation necrosis, which consisted of a hypointense central zone and a hyperintense peripheral zone. There were significantly lower ADC, parallel diffusivity, and perpendicular diffusivity in the necrotic central zone than in the peripheral zone (all P < 0.001). When radiation-induced necrosis was compared with viable tumor, radiation necrosis had significantly lower ADC than 9L gliosarcoma and human glioma xenografts (both P < 0.01) in the central zone, and significantly lower fractional anisotropy than 9L gliosarcoma (P = 0.005) and human glioma xenografts (P = 0.012) in the peripheral zone. Histological analysis revealed parenchymal coagulative necrosis in the central zone, and damaged vessels and reactive astrogliosis in the peripheral zone. These data suggest that qualitative and quantitative analysis of the DTI maps can provide useful information by which to distinguish between radiation necrosis and viable glioma.
Literature
2.
go back to reference Stupp R, Mason WP, van den Bent MJ, Weller M, Fisher B, Taphoorn MJB, Belanger K, Brandes AA, Marosi C, Bogdahn U, Curschmann J, Janzer RC, Ludwin SK, Gorlia T, Allgeier A, Lacombe D, Cairncross JG, Eisenhauer E, Mirimanoff RO (2005) Radiotherapy plus concomitant and adjuvant temozolomide for glioblastoma. N Engl J Med 352:987–996PubMedCrossRef Stupp R, Mason WP, van den Bent MJ, Weller M, Fisher B, Taphoorn MJB, Belanger K, Brandes AA, Marosi C, Bogdahn U, Curschmann J, Janzer RC, Ludwin SK, Gorlia T, Allgeier A, Lacombe D, Cairncross JG, Eisenhauer E, Mirimanoff RO (2005) Radiotherapy plus concomitant and adjuvant temozolomide for glioblastoma. N Engl J Med 352:987–996PubMedCrossRef
3.
go back to reference Mullins ME, Barest GD, Schaefer PW, Hochberg FH, Gonzalez RG, Lev MH (2005) Radiation necrosis versus glioma recurrence: conventional MR imaging clues to diagnosis. AJNR Am J Neuroradiol 26:1967–1972PubMed Mullins ME, Barest GD, Schaefer PW, Hochberg FH, Gonzalez RG, Lev MH (2005) Radiation necrosis versus glioma recurrence: conventional MR imaging clues to diagnosis. AJNR Am J Neuroradiol 26:1967–1972PubMed
4.
go back to reference Butowski NA, Sneed PK, Chang S (2006) Diagnosis and treatment of recurrent high-grade astrocytoma. J Clin Oncol 24:1273–1280PubMedCrossRef Butowski NA, Sneed PK, Chang S (2006) Diagnosis and treatment of recurrent high-grade astrocytoma. J Clin Oncol 24:1273–1280PubMedCrossRef
5.
go back to reference Jain R, Narang J, Sundgren PM, Hearshen D, Saksena S, Rock JP, Gutierrez J, Mikkelsen T (2010) Treatment induced necrosis versus recurrent/progressing brain tumor: going beyond the boundaries of conventional morphologic imaging. J Neuro Oncol 100:17–29CrossRef Jain R, Narang J, Sundgren PM, Hearshen D, Saksena S, Rock JP, Gutierrez J, Mikkelsen T (2010) Treatment induced necrosis versus recurrent/progressing brain tumor: going beyond the boundaries of conventional morphologic imaging. J Neuro Oncol 100:17–29CrossRef
6.
go back to reference Rogers LR, Gutierrez J, Scarpace L, Schultz L, Ryu S, Lord B, Movsas B, Honsowetz J, Jain R (2011) Morphologic magnetic resonance imaging features of therapy-induced cerebral necrosis. J Neuro Oncol 101:25–32CrossRef Rogers LR, Gutierrez J, Scarpace L, Schultz L, Ryu S, Lord B, Movsas B, Honsowetz J, Jain R (2011) Morphologic magnetic resonance imaging features of therapy-induced cerebral necrosis. J Neuro Oncol 101:25–32CrossRef
7.
go back to reference Graves EE, Nelson SJ, Vigneron DB, Verhey L, McDermott M, Larson D, Chang S, Prados MD, Dillon WP (2001) Serial proton MR spectroscopic imaging of recurrent malignant gliomas after gamma knife radiosurgery. AJNR Am J Neuroradiol 22:613–624PubMed Graves EE, Nelson SJ, Vigneron DB, Verhey L, McDermott M, Larson D, Chang S, Prados MD, Dillon WP (2001) Serial proton MR spectroscopic imaging of recurrent malignant gliomas after gamma knife radiosurgery. AJNR Am J Neuroradiol 22:613–624PubMed
8.
go back to reference Barajas RF, Chang JS, Sneed PK, Segal MR, McDermott MW, Cha S (2009) Distinguishing recurrent intra-axial metastatic tumor from radiation necrosis following gamma knife radiosurgery using dynamic susceptibility-weighted contrast-enhanced perfusion MR imaging. AJNR Am J Neuroradiol 30:367–372PubMedCrossRef Barajas RF, Chang JS, Sneed PK, Segal MR, McDermott MW, Cha S (2009) Distinguishing recurrent intra-axial metastatic tumor from radiation necrosis following gamma knife radiosurgery using dynamic susceptibility-weighted contrast-enhanced perfusion MR imaging. AJNR Am J Neuroradiol 30:367–372PubMedCrossRef
9.
go back to reference Mitsuya K, Nakasu Y, Horiguchi S, Harada H, Nishimura T, Bando E, Okawa H, Furukawa Y, Hirai T, Endo M (2010) Perfusion weighted magnetic resonance imaging to distinguish the recurrence of metastatic brain tumors from radiation necrosis after stereotactic radiosurgery. J Neuro Oncol 99:81–88CrossRef Mitsuya K, Nakasu Y, Horiguchi S, Harada H, Nishimura T, Bando E, Okawa H, Furukawa Y, Hirai T, Endo M (2010) Perfusion weighted magnetic resonance imaging to distinguish the recurrence of metastatic brain tumors from radiation necrosis after stereotactic radiosurgery. J Neuro Oncol 99:81–88CrossRef
10.
go back to reference Zhou J, Tryggestad E, Wen Z, Lal B, Zhou T, Grossman R, Wang S, Yan K, Fu DX, Ford E, Tyler B, Blakeley J, Laterra J, van Zijl PC (2011) Differentiation between glioma and radiation necrosis using molecular magnetic resonance imaging of endogenous proteins and peptides. Nat Med 17:130–134PubMedCrossRef Zhou J, Tryggestad E, Wen Z, Lal B, Zhou T, Grossman R, Wang S, Yan K, Fu DX, Ford E, Tyler B, Blakeley J, Laterra J, van Zijl PC (2011) Differentiation between glioma and radiation necrosis using molecular magnetic resonance imaging of endogenous proteins and peptides. Nat Med 17:130–134PubMedCrossRef
11.
go back to reference Arbab AS, Janic B, Jafari-Khouzani K, Iskander AS, Kumar S, Varma NR, Knight RA, Soltanian-Zadeh H, Brown SL, Frank JA (2010) Differentiation of glioma and radiation injury in rats using in vitro produce magnetically labeled cytotoxic T-cells and MRI. PLoS One 5:e9365PubMedCrossRef Arbab AS, Janic B, Jafari-Khouzani K, Iskander AS, Kumar S, Varma NR, Knight RA, Soltanian-Zadeh H, Brown SL, Frank JA (2010) Differentiation of glioma and radiation injury in rats using in vitro produce magnetically labeled cytotoxic T-cells and MRI. PLoS One 5:e9365PubMedCrossRef
12.
go back to reference Sinha S, Bastin ME, Whittle IR, Wardlaw JM (2002) Diffusion tensor MR imaging of high-grade cerebral gliomas. AJNR Am J Neuroradiol 23:520–527PubMed Sinha S, Bastin ME, Whittle IR, Wardlaw JM (2002) Diffusion tensor MR imaging of high-grade cerebral gliomas. AJNR Am J Neuroradiol 23:520–527PubMed
13.
go back to reference Mori S, Frederiksen K, van Zijl PC, Stieltjes B, Kraut MA, Solaiyappan M, Pomper MG (2002) Brain white matter anatomy of tumor patients evaluated with diffusion tensor imaging. Annu Neurol 51:377–380CrossRef Mori S, Frederiksen K, van Zijl PC, Stieltjes B, Kraut MA, Solaiyappan M, Pomper MG (2002) Brain white matter anatomy of tumor patients evaluated with diffusion tensor imaging. Annu Neurol 51:377–380CrossRef
14.
go back to reference Huang H, Zhang J, Wakana S, Zhang W, Ren T, Richards LJ, Yarowsky P, Donohue P, Graham E, van Zijl PCM, Mori S (2006) White and gray matter development in human fetal, newborn and pediatric brains. Neuroimage 33:27–38PubMedCrossRef Huang H, Zhang J, Wakana S, Zhang W, Ren T, Richards LJ, Yarowsky P, Donohue P, Graham E, van Zijl PCM, Mori S (2006) White and gray matter development in human fetal, newborn and pediatric brains. Neuroimage 33:27–38PubMedCrossRef
15.
go back to reference Wang SL, Wu EX, Qiu DQ, Leung LHT, Lau HF, Khong PL (2009) Longitudinal diffusion tensor magnetic resonance imaging study of radiation-induced white matter damage in a rat model. Cancer Res 69:1190–1198PubMedCrossRef Wang SL, Wu EX, Qiu DQ, Leung LHT, Lau HF, Khong PL (2009) Longitudinal diffusion tensor magnetic resonance imaging study of radiation-induced white matter damage in a rat model. Cancer Res 69:1190–1198PubMedCrossRef
16.
go back to reference Chan KC, Khong PL, Cheung MM, Wang SL, Cai KX, Wu EX (2009) MRI of late microstructural and metabolic alterations in radiation-induced brain injuries. J Magn Reson Imaging 29:1013–1020PubMedCrossRef Chan KC, Khong PL, Cheung MM, Wang SL, Cai KX, Wu EX (2009) MRI of late microstructural and metabolic alterations in radiation-induced brain injuries. J Magn Reson Imaging 29:1013–1020PubMedCrossRef
17.
go back to reference Zhang J, van Zijl PCM, Laterra J, Salhotra A, Lal B, Mori S, Zhou J (2007) Unique patterns of diffusion directionality in rat brain tumors revealed by high-resolution diffusion tensor MRI. Magn Reson Med 58:454–462PubMedCrossRef Zhang J, van Zijl PCM, Laterra J, Salhotra A, Lal B, Mori S, Zhou J (2007) Unique patterns of diffusion directionality in rat brain tumors revealed by high-resolution diffusion tensor MRI. Magn Reson Med 58:454–462PubMedCrossRef
18.
go back to reference Kim S, Pickup S, Hsu O, Poptani H (2008) Diffusion tensor MRI in rat models of invasion and well-demarcated brain tumors. NMR Biomed 21:208–216PubMedCrossRef Kim S, Pickup S, Hsu O, Poptani H (2008) Diffusion tensor MRI in rat models of invasion and well-demarcated brain tumors. NMR Biomed 21:208–216PubMedCrossRef
19.
go back to reference Asanuma T, Doblas S, Tesiram YA, Saunders D, Cranford R, Pearson J, Abbott A, Smith N, Towner RA (2008) Diffusion tensor imaging and fiber tractography of C6 rat glioma. J Magn Reson Imaging 28:566–573PubMedCrossRef Asanuma T, Doblas S, Tesiram YA, Saunders D, Cranford R, Pearson J, Abbott A, Smith N, Towner RA (2008) Diffusion tensor imaging and fiber tractography of C6 rat glioma. J Magn Reson Imaging 28:566–573PubMedCrossRef
20.
go back to reference Lope-Piedrafita S, Garcia-Martin ML, Galons J-P, Gillies RJ, Trouard TP (2008) Longitudinal diffusion tensor imaging in a rat brain glioma model. NMR Biomed 21:799–808PubMedCrossRef Lope-Piedrafita S, Garcia-Martin ML, Galons J-P, Gillies RJ, Trouard TP (2008) Longitudinal diffusion tensor imaging in a rat brain glioma model. NMR Biomed 21:799–808PubMedCrossRef
21.
go back to reference Sarkaria JN, Carlson BL, Schroeder MA, Grogan P, Brown PD, Giannini C, Ballman KV, Kitange GJ, Guha A, Pandita A, James CD (2006) Use of an orthotopic xenograft model for assessing the effect of epidermal growth factor receptor amplification on glioblastoma radiation response. Clin Cancer Res 12:2264–2271PubMedCrossRef Sarkaria JN, Carlson BL, Schroeder MA, Grogan P, Brown PD, Giannini C, Ballman KV, Kitange GJ, Guha A, Pandita A, James CD (2006) Use of an orthotopic xenograft model for assessing the effect of epidermal growth factor receptor amplification on glioblastoma radiation response. Clin Cancer Res 12:2264–2271PubMedCrossRef
22.
go back to reference Salhotra A, Lal B, Laterra J, Sun PZ, van Zijl PCM, Zhou J (2008) Amide proton transfer imaging of 9L gliosarcoma and human glioblastoma xenografts. NMR Biomed 21:489–497PubMedCrossRef Salhotra A, Lal B, Laterra J, Sun PZ, van Zijl PCM, Zhou J (2008) Amide proton transfer imaging of 9L gliosarcoma and human glioblastoma xenografts. NMR Biomed 21:489–497PubMedCrossRef
23.
go back to reference Wong J, Armour E, Kazanzides P, Iordachita U, Tryggestad E, Deng H, Matinfar M, Kennedy C, Liu Z, Chan T, Gray O, Verhaegen F, McNutt T, Ford E, DeWeese TL (2008) High-resolution, small animal radiation research platform with X-ray tomographic guidance capabilities. Int J Rad Oncol Biol Phys 71:1591–1599CrossRef Wong J, Armour E, Kazanzides P, Iordachita U, Tryggestad E, Deng H, Matinfar M, Kennedy C, Liu Z, Chan T, Gray O, Verhaegen F, McNutt T, Ford E, DeWeese TL (2008) High-resolution, small animal radiation research platform with X-ray tomographic guidance capabilities. Int J Rad Oncol Biol Phys 71:1591–1599CrossRef
24.
go back to reference Kennedy AS, Archambeau JO, Archambeau M-H, Holshouser B, Thompson J, Moyers M, Hinshaw D, Slater JM (1995) Magnetic resonance imaging as a monitor of changes in the irradiated rat brain. An aid in determining the time course of events in a histologic study. Invest Radiol 30:214–220PubMedCrossRef Kennedy AS, Archambeau JO, Archambeau M-H, Holshouser B, Thompson J, Moyers M, Hinshaw D, Slater JM (1995) Magnetic resonance imaging as a monitor of changes in the irradiated rat brain. An aid in determining the time course of events in a histologic study. Invest Radiol 30:214–220PubMedCrossRef
25.
go back to reference Jiang H, van Zijl PC, Kim J, Pearlson GD, Mori S (2006) DtiStudio: resource program for diffusion tensor computation and fiber bundle tracking. Comput Methods Programs Biomed 81:106–116PubMedCrossRef Jiang H, van Zijl PC, Kim J, Pearlson GD, Mori S (2006) DtiStudio: resource program for diffusion tensor computation and fiber bundle tracking. Comput Methods Programs Biomed 81:106–116PubMedCrossRef
26.
go back to reference Burger PC, Dubois PJ, Schold SCJ, Smith KRJ, Odom GL, Crafts DC, Giangaspero F (1983) Computerized tomographic and pathologic studies of the untreated, quiescent, and recurrent glioblastoma multiforme. J Neurosurg 58:159–169PubMedCrossRef Burger PC, Dubois PJ, Schold SCJ, Smith KRJ, Odom GL, Crafts DC, Giangaspero F (1983) Computerized tomographic and pathologic studies of the untreated, quiescent, and recurrent glioblastoma multiforme. J Neurosurg 58:159–169PubMedCrossRef
27.
go back to reference Beppu T, Inoue T, Shibata T, Kurose AHA, Ogasawara K, Ogawa A, Nakamura S, Kabasawa H (2003) Measurement of fractional anisotropy using diffusion tensor MRI in supratentorial astrocytic tumors. J Neuro Oncol 63:109–116CrossRef Beppu T, Inoue T, Shibata T, Kurose AHA, Ogasawara K, Ogawa A, Nakamura S, Kabasawa H (2003) Measurement of fractional anisotropy using diffusion tensor MRI in supratentorial astrocytic tumors. J Neuro Oncol 63:109–116CrossRef
28.
go back to reference Beppu T, Inoue T, Shibata Y, Yamada N, Kurose A, Ogasawara K, Ogawa A, Kabasawa H (2005) Fractional anisotropy value by diffusion tensor magnetic resonance imaging as a predictor of cell density and proliferation activity of glioblastomas. Surg Neurol 63:56–61PubMedCrossRef Beppu T, Inoue T, Shibata Y, Yamada N, Kurose A, Ogasawara K, Ogawa A, Kabasawa H (2005) Fractional anisotropy value by diffusion tensor magnetic resonance imaging as a predictor of cell density and proliferation activity of glioblastomas. Surg Neurol 63:56–61PubMedCrossRef
29.
go back to reference Kinoshita M, Hashimoto N, Goto T, Kagawa N, Kishima H, Izumoto S, Tanaka H, Fujita N, Yoshimine T (2008) Fractional anisotropy and tumor cell density of the tumor core show positive correlation in diffusion tensor magnetic resonance imaging of malignant brain tumors. Neuroimage 43:29–35PubMedCrossRef Kinoshita M, Hashimoto N, Goto T, Kagawa N, Kishima H, Izumoto S, Tanaka H, Fujita N, Yoshimine T (2008) Fractional anisotropy and tumor cell density of the tumor core show positive correlation in diffusion tensor magnetic resonance imaging of malignant brain tumors. Neuroimage 43:29–35PubMedCrossRef
30.
go back to reference Yang I, Aghi MK (2009) New advances that enable identification of glioblastoma recurrence. Nat Rev Clin Oncol 6:648–657PubMedCrossRef Yang I, Aghi MK (2009) New advances that enable identification of glioblastoma recurrence. Nat Rev Clin Oncol 6:648–657PubMedCrossRef
31.
go back to reference Sundgren PC, Fan X, Weybright P, Welsh RC, Carlos RC, Petrou M, McKeever PE, Chenevert TL (2006) Differentiation of recurrent brain tumor versus radiation injury using diffusion tensor imaging in patients with new contrast-enhancing lesions. J Magn Reson Imaging 24:1131–1142CrossRef Sundgren PC, Fan X, Weybright P, Welsh RC, Carlos RC, Petrou M, McKeever PE, Chenevert TL (2006) Differentiation of recurrent brain tumor versus radiation injury using diffusion tensor imaging in patients with new contrast-enhancing lesions. J Magn Reson Imaging 24:1131–1142CrossRef
32.
go back to reference Wang SL, Wu EX, Tam CN, Lau HF, Cheung PT, Khong PL (2008) Characterization of white matter injury in a hypoxic-ischemic neonatal rat model by diffusion tensor MRI. Stroke 39:2348–2353PubMedCrossRef Wang SL, Wu EX, Tam CN, Lau HF, Cheung PT, Khong PL (2008) Characterization of white matter injury in a hypoxic-ischemic neonatal rat model by diffusion tensor MRI. Stroke 39:2348–2353PubMedCrossRef
33.
go back to reference Hein PA, Eskey CJ, Dunn JF, Hug EB (2004) Diffusion-weighted imaging in the follow-up of treated high-grade gliomas: tumor recurrence versus radiation injury. AJNR Am J Neuroradiol 25:201–209PubMed Hein PA, Eskey CJ, Dunn JF, Hug EB (2004) Diffusion-weighted imaging in the follow-up of treated high-grade gliomas: tumor recurrence versus radiation injury. AJNR Am J Neuroradiol 25:201–209PubMed
34.
go back to reference Asao C, Korogi Y, Kitajima M, Hirai T, Baba Y, Makino K, Kochi M, Morishita S, Yamashita Y (2005) Diffusion-weighted imaging of radiation-induced brain injury for differentiation from tumor recurrence. AJNR Am J Neuroradiol 26:1455–1460PubMed Asao C, Korogi Y, Kitajima M, Hirai T, Baba Y, Makino K, Kochi M, Morishita S, Yamashita Y (2005) Diffusion-weighted imaging of radiation-induced brain injury for differentiation from tumor recurrence. AJNR Am J Neuroradiol 26:1455–1460PubMed
35.
go back to reference Kashimura H, Inoue T, Beppu T, Ogasawara K, Ogawa A (2007) Diffusion tensor imaging for differentiation of recurrent brain tumor and radiation necrosis after radiotherapy–three case reports. Clin Neurol Neurosurg 109:106–110PubMedCrossRef Kashimura H, Inoue T, Beppu T, Ogasawara K, Ogawa A (2007) Diffusion tensor imaging for differentiation of recurrent brain tumor and radiation necrosis after radiotherapy–three case reports. Clin Neurol Neurosurg 109:106–110PubMedCrossRef
36.
go back to reference Chenevert TL, McKeever PE, Ross BD (1997) Monitoring early response of experimental brain tumors to therapy using diffusion magnetic resonance imaging. Clin Cancer Res 3:1457–1466PubMed Chenevert TL, McKeever PE, Ross BD (1997) Monitoring early response of experimental brain tumors to therapy using diffusion magnetic resonance imaging. Clin Cancer Res 3:1457–1466PubMed
37.
go back to reference Inoue T, Ogasawara K, Beppu T, Ogawa A, Kabasawa H (2005) Diffusion tensor imaging for preoperative evaluation of tumor grade in gliomas. Clin Neurol Neurosurg 107:174–180PubMedCrossRef Inoue T, Ogasawara K, Beppu T, Ogawa A, Kabasawa H (2005) Diffusion tensor imaging for preoperative evaluation of tumor grade in gliomas. Clin Neurol Neurosurg 107:174–180PubMedCrossRef
38.
go back to reference Wang YX, King AD, Zhou H, Leung SF, Abrigo J, Chan YL, Hu CW, Yeung DK, Ahuja AT (2010) Evolution of radiation-induced brain injury: MR imaging-based study. Radiology 254:210–218PubMedCrossRef Wang YX, King AD, Zhou H, Leung SF, Abrigo J, Chan YL, Hu CW, Yeung DK, Ahuja AT (2010) Evolution of radiation-induced brain injury: MR imaging-based study. Radiology 254:210–218PubMedCrossRef
39.
go back to reference Poonawalla AH, Zhou XJ (2004) Analytical error propagation in diffusion anisotropy calculations. J Magn Reson Imaging 19:489–498PubMedCrossRef Poonawalla AH, Zhou XJ (2004) Analytical error propagation in diffusion anisotropy calculations. J Magn Reson Imaging 19:489–498PubMedCrossRef
40.
go back to reference Ni H, Kavcic V, Zhu T, Ekholm S, Zhong J (2006) Effects of number of diffusion gradient directions on derived diffusion tensor imaging indices in human brain. AJNR Am J Neuroradiol 27:1776–1781PubMed Ni H, Kavcic V, Zhu T, Ekholm S, Zhong J (2006) Effects of number of diffusion gradient directions on derived diffusion tensor imaging indices in human brain. AJNR Am J Neuroradiol 27:1776–1781PubMed
41.
go back to reference Gulani V, Weber T, Neuberger T (2005) Improved time efficiency and accuracy in diffusion tensor microimaging with multiple-echo acquisition. J Magn Reson 177:329–335PubMedCrossRef Gulani V, Weber T, Neuberger T (2005) Improved time efficiency and accuracy in diffusion tensor microimaging with multiple-echo acquisition. J Magn Reson 177:329–335PubMedCrossRef
42.
go back to reference Nana R, Zhao T, Hu X (2008) Single-shot multiecho parallel echo-planar imaging (EPI) for diffusion tensor imaging (DTI) with improved signal-to-noise ratio (SNR) and reduced distortion. Magn Reson Med 60:1512–1517PubMedCrossRef Nana R, Zhao T, Hu X (2008) Single-shot multiecho parallel echo-planar imaging (EPI) for diffusion tensor imaging (DTI) with improved signal-to-noise ratio (SNR) and reduced distortion. Magn Reson Med 60:1512–1517PubMedCrossRef
Metadata
Title
Evaluation of radiation necrosis and malignant glioma in rat models using diffusion tensor MR imaging
Authors
Silun Wang
Yifei Chen
Bachchu Lal
Eric Ford
Erik Tryggestad
Michael Armour
Kun Yan
John Laterra
Jinyuan Zhou
Publication date
01-03-2012
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 1/2012
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-011-0719-x

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