[Usefulness of multiphase helical CT in the diagnosis of pituitary microadenoma].
The purpose of this study was to determine the value of multiphase helical CT (MHCT) in the diagnosis of pituitary microadenoma. Twenty-two patients with clinically suspected microadenoma were examined. Coronal pre-contrast CT was initially carried out. Three series of helical scanning using 1-mm collimation, 1-mm/s table speed, and 1-mm interval reconstruction covering the entire pituitary gland were performed with an intravenous injection of contrast medium. Immediately after MHCT, delayed CECT was performed. Twenty microadenomas (3-10 mm, mean: 5.5 mm) were surgically confirmed. MHCT could depict all 20 tumors, while pre-contrast CT and delayed CECT showed 4 and 12 of 20 tumors, respectively. MHCT was useful in the diagnosis of pituitary microadenoma owing to its high spatial resolution and extensive coverage.
Takagi
R
R
Nippon Medical School, Department of Radiology.
Amano
Y
Y
Uchiyama
N
N
Hayashi
H
H
Teramoto
A
A
Kumazaki
T
T
D000236:Adenoma / Q000000981:diagnostic imaging*; D006801:Humans; D010911:Pituitary Neoplasms / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*