@misc{oai:repo.qst.go.jp:00060916, author = {古賀, 雅久 and 佐合, 賢治 and 吉川, 京燦 and 溝江, 純悦 and 古賀 雅久 and 佐合 賢治 and 吉川 京燦 and 溝江 純悦}, month = {Apr}, note = {Forty-nine patients with Head and Neck tumor were studied using C-11 methionine with combined PET/CT scanner, Siemens Biograph, and precise fusion PET and CT images were acquired. We aligned CT images of PET/CT and MRI acquired on different scanners using a co-registration computer algorithm of Dr,View software on PC machine. And then we swapped CT images with MRI images to get MRI-PET fusion images. Results: Due to the rich anatomical imformation of both CT and MRI images, our computer algorithm, AMIR, resulted in accurate MRI-CT fusion, and then precise MRI-PET fusion was successfully achieved by swapping CT images with MRI images. MRI-PET fusion images rather than PET fusion images showed clearly tumor extent or invasion into surrounding tissue, especially muscles and soft tissues, and it played a significant role in diagnosis, staging and treatment. Conclusions: We could get precisely co-registered MRI and PET images with the help of PET/CT fusion images. MRI-PET fusion images. MRI-PET fusion images were useful especially for diagnosis tumor extent or invasion into muscles and soft tissues in Head and Neck., 平成16年度HIMAMC共同利用研究成果発表会}, title = {頭頚部・脳腫瘍におけるPET-CT-MRI/MRS画像の有用性の検討}, year = {2005} }