Estimating the Two-Dimensional Blood Flow Velocity Map from Cineangiograms: Algorithm Using an Initial Guess and Its Application to an Abdominal Aneurysm
スポンサーリンク
概要
- 論文の詳細を見る
To derive blood flow dynamics from cineangiograms (CAG), we have developed an image processing algorithm to estimate a two-dimensional blood flow velocity map projected on CAG. Each image area of CAG is divided into blocks, and it is assumed that the movement of the contrast medium between two serial frames is restricted only to adjacent blocks. By this assumption, a "fundamental equation" and the "maximum flow constraints" are derived. The equation and constraints state the relationship between the volume of contrast medium in each block and the "flow components" that are the volumes of contrast medium flowing from / to its adjacent blocks. The "initial guess" that is a set of approximately obtained flow components is corrected using these relationships. The corrected flow components are then transformed into blood flow velocities, which are illustrated in the form of a needle diagram. In numerical experiments, the estimation error between the real flow velocity generated artificially and the flow velocity estimated with our algorithm was evaluated under one of the worst conditions. Although the maximum error was fairly large, the estimated flow velocity map was still acceptable for visual inspection of flow velocity pattern. We then applied our algorithm to an abdominal CAG (clinical data). The results showed flow stagnation and reverse flow in the abdominal aneurysm, which are consistent with the presence of a thrombus in the aneurysm. This algorithm may be a useful diagnostic tool in the assessment of vascular disease.
- 社団法人電子情報通信学会の論文
- 1993-10-25
著者
-
Sugahara Tetsuo
Department Of The Investigative Radiology National Cardiovascular Center Research Institute
-
Sugahara Tetsuo
Department Of Bioinformatics Soka University
-
Uyama Chikao
Department Of Clinical Engineering Faculty Of Health Sciences Hiroshima International University
-
Uyama Chikao
Department Of The Investigative Radiology National Cardiovascular Center Research Institute
-
Sugimoto Naozo
Department Of The Investigative Radiology National Cardiovascular Center Research Institute
-
Yanagihara Yoshio
Department Of The Investigative Radiology National Cardiovascular Center Research Institute
-
Yanagihara Yoshio
Department Of Information And Communication Engineering Osaka City University
関連論文
- DEVELOPMENT OF A NOVEL BONE RADIOGRAPHY BY MEANS OF SYNCHROTRON X-RAY PHASE CONTRAST
- Simple X-Ray Dark- and Bright-Field Imaging Using Achromatic Laue Optics : Instrumentation, Measurement, and Fabrication Technology
- Leptosins isolated from marine fungus Leptoshaeria species inhibit DNA topoisomerases I and/or II and induce apoptosis by inactivation of Akt/protein kinase B
- Principle and in vivo Application of Measurement of Blood Flow by Heated Thermocouple with Feedback Controlled Heater
- The 3-D box method for recovering shapes of 3-D objects from multi-images
- Estimating the Two-Dimensional Blood Flow Velocity Map from Cineangiograms: Algorithm Using an Initial Guess and Its Application to an Abdominal Aneurysm
- A study on the precision of the depth measurement with view directions of human eyes
- Evaluating skin condition using cosmetics by image processing of cheek replica
- A study of extraction of activation areas on PET images
- A Study of Adequate Magnification on Vessel Measurement(the effects of magnification on digitizing cine films for computerized maesurement of vessel diameters)
- Evaluating skin condition using cosmetics by image processing of cheek replica