T. Sugahara et al., CORRELATION OF MR IMAGING-DETERMINED CEREBRAL BLOOD-VOLUME MAPS WITH HISTOLOGIC AND ANGIOGRAPHIC DETERMINATION OF VASCULARITY OF GLIOMAS, American journal of roentgenology, 171(6), 1998, pp. 1479-1486
OBJECTIVE. Our purpose was to evaluate the relationships between the r
atio of maximum relative cerebral blood volume (rCBV) (rCBV ratio = rC
BV[tumor] / rCBV[contralateral white matter]) and histologic and angio
graphic vascularities of gliomas using the gradient-echo echoplanar MR
imaging technique. We also evaluated the usefulness of rCBV maps for
grading gliomas. SUBJECTS AND METHODS. We examined 30 patients with hi
stologically verified gliomas. Gliomas were classified as glioblastoma
, anaplastic glioma with enhancement, anaplastic glioma without enhanc
ement, and low-grade glioma. The maximum rCBV ratio of each glioma was
compared with both histologic and angiographic vascularities, and the
relationship between the maximum rCBV ratios and each type of glioma
was established, RESULTS. The maximum rCBV ratios of the gliomas signi
ficantly correlated with both histologic and angiographic vascularitie
s (p < .001). Mean values and SDs of maximum rCBV ratios of each type
of tumor were 7.32 +/- 4.39 for glioblastomas, 5.84 +/- 1.82 for anapl
astic gliomas with enhancement, 1.53 +/- 0.75 for anaplastic gliomas w
ithout enhancement, and 1.26 +/- 0.55 for low-grade gliomas. The maxim
um rCBV ratios of the glioblastomas were significantly higher than tho
se of the anaplastic gliomas without enhancement (p =.002) and the low
-grade gliomas (p < .001), The maximum rCBV ratios of the anaplastic g
liomas with enhancement were higher than those of the anaplastic gliom
as without enhancement and the low-grade gliomas, but the differences
were not statistically significant (p =.08 and p = .03, respectively).
CONCLUSION. The results of perfusion-sensitive MR imaging with gradie
nt-echo echoplanar technique correlated with both histologic and angio
graphic vascularities.