title: [Usefulness of Iterative Reconstruction Method in the Field of Acute Cerebral Infarction Computed Tomography Examination].
abstract: We evaluated clinical images to investigate the usefulness of adaptive iterative dose reduction algorithm (AIDR) in the field of acute cerebral infarction. We did receiver operating characteristic (ROC) analysis by 4 radiologists using 50 clinical images (abnormal case=24, normal case=26) which were reconstructed by AIDR and filtered back projection (FBP). The area under the curve (AUC) value from average ROC curve of observers were 0.79 with the FBP and 0.87 with the AIDR (P=0.31). The standard deviation of AUC was 0.06 with the FBP and 0.03 with the AIDR. More in detail, the AUC value of Expert group (over 10 years of experience) increased to 0.06 by using AIDR compared with FBP method. On the other hand, in Beginner group (less than 10 years of experience) there was 0.09 increase. Therefore, there was some possibility to reduce the variation of diagnostic accuracy among observer and the diagnostic accuracy improvement of the doctor in a few Experience group, by using AIDR for acute cerebral infarction computed tomography (CT) examination.
authors.affiliation: Department of Radiology, Shimane University Hospital.
authors.forename: Keiji
authors.initials: K
authors.lastname: Tada
authors.forename: Koji
authors.initials: K
authors.lastname: Uchida
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Kanayama
authors.forename: Takafumi
authors.initials: T
authors.lastname: Kajitani
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Shigeru
authors.initials: S
authors.lastname: Sanada
mesh_terms: D000208:Acute Disease; D000369:Aged, 80 and over; D019540:Area Under Curve; D002544:Cerebral Infarction / Q000000981:diagnostic imaging*; D005260:Female; D066128:Gray Matter / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D011829:Radiation Dosage; D059629:Signal-To-Noise Ratio; D020521:Stroke / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D066127:White Matter / Q000000981:diagnostic imaging