TY - JOUR
T1 - Measurement of magnetization transfer in different stages of neurocysticercosis
AU - Kathuria, Manoj K.
AU - Gupta, Rakesh K.
AU - Roy, R.
AU - Gaur, Vandana
AU - Husain, N.
AU - Pradhan, Sunil
PY - 1998/3
Y1 - 1998/3
N2 - The purpose of this study was to establish magnetization transfer ratio (MTR) in different stages of neurocysticercosis. A total 2,5,32 cysticerci were studied prospectively in 15 cases. MTR from different regions of the lesions (ie, the cyst, the protoscolex or mural nodule, the granuloma wall)) were calculated in different stages of evolution/degeneration in all cases. Of a total 2.532 lesions studied, 2,261 (89.29%) were seen on routine spin- echo (SE) imaging. The rest of the lesions were only seen on magnetization transfer (MT) SE imaging. Maximum MTR was calculated from healing lesions (mean + SD = 31.0 ± 2.8) and from the core of SE invisible lesions (30.0 ± 5.1). Innocuous cystic lesions, which were hyperintense on T2-weighted images, did not show any MT (MTR = 5.10 ± 1.2), whereas degenerating T2 hyperintense lesions showed MTR of 26.40 ± 2.7. Nondegenerating and degenerating scolices showed an intermediate MTR of 21.7 ± 3.3 and 15.0 ± 4.5, respectively. MT varies between different parts of the lesion and also from the same part in different stages of evolution/degeneration of the lesion. The visibility of a lesion on MT-SE sequence was dependent on its MTR and its location at a particular site (cortical gray matter, white matter, or deep gray matter). The difference in MTR of the lesion and the surrounding brain parenchyma decides the resulting contrast and visibility of the lesion.
AB - The purpose of this study was to establish magnetization transfer ratio (MTR) in different stages of neurocysticercosis. A total 2,5,32 cysticerci were studied prospectively in 15 cases. MTR from different regions of the lesions (ie, the cyst, the protoscolex or mural nodule, the granuloma wall)) were calculated in different stages of evolution/degeneration in all cases. Of a total 2.532 lesions studied, 2,261 (89.29%) were seen on routine spin- echo (SE) imaging. The rest of the lesions were only seen on magnetization transfer (MT) SE imaging. Maximum MTR was calculated from healing lesions (mean + SD = 31.0 ± 2.8) and from the core of SE invisible lesions (30.0 ± 5.1). Innocuous cystic lesions, which were hyperintense on T2-weighted images, did not show any MT (MTR = 5.10 ± 1.2), whereas degenerating T2 hyperintense lesions showed MTR of 26.40 ± 2.7. Nondegenerating and degenerating scolices showed an intermediate MTR of 21.7 ± 3.3 and 15.0 ± 4.5, respectively. MT varies between different parts of the lesion and also from the same part in different stages of evolution/degeneration of the lesion. The visibility of a lesion on MT-SE sequence was dependent on its MTR and its location at a particular site (cortical gray matter, white matter, or deep gray matter). The difference in MTR of the lesion and the surrounding brain parenchyma decides the resulting contrast and visibility of the lesion.
KW - Brain, infections
KW - Cysticercosis
KW - MRI
KW - Magnetization transfer
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U2 - 10.1002/jmri.1880080231
DO - 10.1002/jmri.1880080231
M3 - Article
C2 - 9562078
AN - SCOPUS:0031923439
SN - 1053-1807
VL - 8
SP - 473
EP - 479
JO - Journal of Magnetic Resonance Imaging
JF - Journal of Magnetic Resonance Imaging
IS - 2
ER -