CT imaging based digitally reconstructed radiographs and their application in brachytherapy.

نویسندگان

  • N Milickovic
  • D Baltast
  • S Giannouli
  • M Lahanas
  • N Zamboglou
چکیده

The aim of our study was to develop an algorithm to simulate the digitally reconstructed radiograph (DRR) calculation process for different beam qualities (photon energies) in the range 50 keV to 12 MeV. This was achieved using volumetric anatomical data for the patient obtained from three-dimensional diagnostic CT images. These DRR images can be used in three-dimensional treatment planning for external beam radiotherapy as well as for brachytherapy in the same way as conventional radiographic films. The advantages of using such DRRs in modern 3D brachytherapy treatment planning are shown. A number of tools are described, illustrating that the application of DRRs in brachytherapy is very useful.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

CT-Based Brachytherapy Treatment Planning using Monte Carlo Simulation Aided by an Interface Software

Introduction: In brachytherapy, radioactive sources are placed close to the tumor, therefore, small changes in their positions can cause large changes in the dose distribution. This emphasizes the need for computerized treatment planning. The usual method for treatment planning of cervix brachytherapy uses conventional radiographs in the Manchester system. Nowadays, because of their advantages ...

متن کامل

Modern Imaging in Brachytherapy

The imaging revolution with Ultrasound, Computed Tomography, and Magnetic Resonance Imaging entered the world of treatment planning in external beam radiation therapy in the 80ies and 90ies, step by step (9). With the support of modern computer technology, this has led to sophisticated, widespread, 3D sectional image based treatment planning, that nowadays increasingly forms an essential integr...

متن کامل

Gold marker displacement due to needle insertion during HDR-brachytherapy for treatment of prostate cancer: A prospective cone beam computed tomography and kilovoltage on-board imaging (kV-OBI) study

PURPOSE To evaluate gold marker displacement due to needle insertion during HDR-brachytherapy for therapy of prostate cancer. PATIENTS AND METHODS 18 patients entered into this prospective evaluation. Three gold markers were implanted into the prostate during the first HDR-brachytherapy procedure after the irradiation was administered. Three days after marker implantation all patients had a C...

متن کامل

Mutual Information - Based Registration of Digitally Reconstructed Radiographs and Electronic Portal

This study regards discrete mutual information and demonstrates the use of the theory with an example of radiological image registration with in-plane, twodimensional images, using various search strategies. Image registration is the process of finding an optimal geometric transformation between corresponding image data. Although it has applications in many fields, the one that is addressed in ...

متن کامل

MRI Visualisation by Digitally Reconstructed Radiographs

Visualising volumetric medical images such as computed tomography and magnetic resonance imaging (MRI) on picture archiving and communication systems (PACS) clients is often achieved by image browsing in sagittal, coronal or axial views or three-dimensional (3D) rendering. This latter technique requires fine thresholding for MRI. On the other hand, computing virtual radiograph images, also refe...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physics in medicine and biology

دوره 45 10  شماره 

صفحات  -

تاریخ انتشار 2000