Evaluation of Images for Computed Tomography Scanners by Entropy
スポンサーリンク
概要
- 論文の詳細を見る
The precision of images for computed tomography (CT) scanners is synthetically evaluated by a single entropy number. The results obtained from four CT scanners show that the maximum and minimum transmitted information quantities are 1.83 bits and 1.23 bits per image on average, respectively (ideal transmitted information quantities are 2.32 bits). Assuming that only the standard deviation of CT numbers and the contrast scale affect the precision of CT images, the transmitted information quantities are calculated theoretically and are compared with the measured ones.
- 社団法人応用物理学会の論文
- 1980-11-05
著者
-
UCHIDA Suguru
Department of Electrical Engineering, Faculty of Engineering, Gifu University
-
Katsuragawa Shigehiko
Department Of Radiology Iwate Medical University
-
Katsuragawa Shigehiko
Department Of Radiology Yukioka Medical Technology School
-
SUEYOSHI Takehiro
Department of Radiology, Seikeikai 2nd Medical Technology School
-
Sueyoshi Takehiro
Department Of Radiology Seikeikai 2nd Medical Technology School
-
Uchida Suguru
Department Of Electrical Engineering Faculty Of Engineering Gifu University
関連論文
- Influence of Clinical Information on the Detection of Wrist Fractures in Children
- Failure in Presumption of Residual Disease by Quantification of FDG Uptake in Esophageal Squamous Cell Carcinoma Immediately after Radiotherapy
- Reciprocity-Law Failure in Radiographic Image-Forming Systems
- Reliability of the Modulation Transfer Function of Radiographic Screen-Film Systems Measured by the Slit Method
- Comparison of Several Methods for Measuring the Wiener Spectrum of Radiographic Screen-Film Systems
- Evaluation of Radiographic Images by Using Sequential Dependency
- Evaluation of Images for Computed Tomography Scanners by Entropy
- Evaluation of the Wiener Spectrum of Radiographic Screen-Film Systems by Entropy
- Theoretical Analysis of Radiographic Images by Nonstationary Poisson Processes
- Applications of Uncertainty Analysis to Visual Evaluation of Density in Radiographs
- Evaluation of Radiographic Images by Entropy : Application to Development Process
- Reciprocity-Law Failure in X-Ray Films in Reversal Processing
- Fourier Analysis of the Blurring Caused by the Ionization Chamber (2) : in Depth Dosimetry
- The Relationship between Signals and Graininess on Radiographs
- Assessment of Radiological Image Quality by Redundancy : Subject Contrast
- Evaluation of Total Performance of Image Receptor by Redundancy
- Assessment of Image Quality of Negative- and Reversal-Processed Medical X-Ray Films with Intensifying Screens by Entropy Method
- Transmitted Information of TLD Elements
- A New Method of Measuring Line Spread Function
- Fourier Analysis of the Blurring Caused by the Ionization Chamber (1) : in Air Dosimetry
- Entropy Calculation Method in a Duplicating Series System
- Assessment of Radiographic Granularity by a Single Number. : II. Interpretation of Conditional Entropy H_x(y) in the Bivariate Entropy Method
- Image Quality of Reversal-Developed X-Ray Film with Reference to Density
- Spatial Frequency Characteristics of Reversal X-Ray Films
- Assessment of Radiographic Granularity by a Single Number