Volume 9, Number 2 (Scientific Journal of Hamadan University of Medical Sciences-Summer 2002)                   Sci J Hamadan Univ Med Sci 2002, 9(2): 0-0 | Back to browse issues page


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Azizian G, Sarkar S, Abolhasani M J. Construction Three-Dimentional Images Using Conventional Two - Dimentional Ultrasound Systems.. Sci J Hamadan Univ Med Sci . 2002; 9 (2)
URL: http://sjh.umsha.ac.ir/article-1-746-en.html

Abstract:   (503 Views)

Ultrasound imaging is one of the common methods in medical diagnostic
   systems. There are many artifacts in a two dimentional image. Three dimentional
   imaging can be used for better interpretation and perception of an image. Since
   1969 many attemps have been made in this regards, and research continues all
   over the world. The main goal in our research was to create three - dimentional
   images using conventional 2-D ultrasound systems.

          To obtain three dimentional data for construction of 3-D images, a conventional
   sonography with linear array transducer was used. The 2-D images of an
   alominume cylinder, fiber glass sphere, human hand, sheep kidney, human
   kidney, and carotid were taken. Using a scanner with three degree of freedom, the
   images locations were determined. In one of three directions, the transducer
   translations movement was performed. Using a stepping motor the scanner
   movements were achieved. High level language programming ‘C’ were written to
   control the scanner. Each image slice was obtained with 1mm slice thickness step.
   Using appropriate image processing techniques such as filtering and interpolation,
   image reconstruction was performed from obtained 2-D images. These image
   proccesings were done using MATLAB software.

          After reconstruction images in other dimentions, the images were studied from
   two aspects. At the first step the size of reconstructed images compared with the
   main object. For one dimention of an object 12.5mm,average of images was
   12.629 mm. There was not significant difference between them. In next step,
   images were compared with the main objects  regard their appearances. For
   objects such as fiber glass sphere, alominume cylinder , because of the artifacts,
   reconstructed images were not  exactly like main objects. But for human hand,
   sheep kidney, and carotid , there was proper accomodation between images
   and main objects. For human kidney, the obtained images were not clear.

          In vitro ,reconstruction of images for objects which are equal with the organs
   like sheep kidney and human hand was done. In vivo for carotid vessel there was
   accomodation between carotid  and its images. For human kidney was not done.

     
Type of Study: Original | Subject: Special

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