<prompt> Parameningeal Rhabdomyosarcoma is best diagnosed by-MRICT ScanSPECTPET  <response>: A i.e. MRI PET SPECT are functional brain imaging modalities so these cannot be used for dx of parameningeal Rhabdomyosarcoma. Other informations indicating towards answer are Investigation of choice for primary or metastatic brain tumor MRI Contrast Harrison Inv. of choice for meningeal tumors MRI Contrast Ganong-2337 Inv. of choice for meningeal disease MRI Contrast Harrison MRI is excellent for soft tissue imaging CT is best for bone imaging. 