[Study of gradient echo (GRE) Dixon image using low-field MRI scanner for examination of metastatic bone marrow tumors: comparison of double and single echo sequences].
We evaluated the gradient echo (GRE) Dixon method in metastatic bone tumors using a low-field MRI scanner (0.2 Tesla). This method is characterized by the double echo sequence of in-phase and opposed-phase. Studies were carried out on a phantom, 14 healthy volunteers, and clinical examples (33 vertebral bodies) using the T(1)-weighted spin echo, T(2)-weighted turbo spin echo, and GRE Dixon methods. Further, we obtained addition and subtraction images from the double echo sequence. In the clinical examples, the contrast-to-noise ratio (CNR) of the subtraction images (51.3+/-24.1) was significantly better than that of the T(1)-SE images (6.7+/-3.1, p<0.0001). For the examination of metastatic bone marrow tumors using a low-field MRI scanner (0.2 Tesla), subtraction images are thought to be the most effective.
Ohno
Seiichiro
S
Central Division of Radiology, Okayama University Hospital.
Togami
Izumi
I
Kitayama
Takuichi
T
Ohkawa
Yoshihiro
Y
Kobayashi
Hisakazu
H
Akagi
Noriaki
N
Yamashita
Eijiro
E
Nobuhara
Eitaro
E
Morioka
Yasuki
Y
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019046:Bone Marrow Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging