Fiirgaard B, Pedersen C B, Lundorf E
Department of Neuroradiology, Aarhus University Hospital, Denmark.
Neuroradiology. 1997 Aug;39(8):599-601. doi: 10.1007/s002340050475.
The growth rate of acoustic neuromas is very variable: some tumours grow rapidly, some do not grow and some even get smaller. When making treatment decisions, it may be important to have an idea of the growth rate of the individual tumour, and this is only possible when there are comparable examinations. We performed both CT and MRI on 15 patients. Two radiologists estimated the size of their acoustic neuromas. There was a significant difference between the two examiners' calculations of tumour volumes on CT and between the first examiner's CT and MRI volume calculations. No difference was found between the two MRI volume estimations or the second examiner's estimation of volumes on CT and MRI. Measurements of the maximal tumour diameter along the pyramid showed good concordance. We conclude that measurement the size of acoustic neuromas is reproducible with MRI and the measurement of the maximal tumour diameter is in practice a better parameter for comparison than calculation of real volume.
一些肿瘤生长迅速，一些不生长，甚至一些会变小。在做出治疗决策时，了解个体肿瘤的生长速度可能很重要，而这只有在有可比较的检查时才有可能。我们对15名患者进行了CT和MRI检查。两位放射科医生估计了他们听神经瘤的大小。两位检查者对CT上肿瘤体积的计算之间以及第一位检查者对CT和MRI体积的计算之间存在显著差异。在两次MRI体积估计之间或第二位检查者对CT和MRI上体积的估计之间未发现差异。沿锥体测量肿瘤最大直径显示出良好的一致性。我们得出结论，MRI可重复性地测量听神经瘤的大小，并且在实际中，测量肿瘤最大直径比计算实际体积是更好的比较参数。
