Optimizing the reconstruction filter in cone-beam CT to improve periodontal ligament space visualization: An in vitro study

نویسندگان

  • Yuuki Houno
  • Toshimitsu Hishikawa
  • Ken-ichi Gotoh
  • Munetaka Naitoh
  • Akio Mitani
  • Toshihide Noguchi
  • Eiichiro Ariji
  • Yoshie Kodera
چکیده

PURPOSE Evaluation of alveolar bone is important in the diagnosis of dental diseases. The periodontal ligament space is difficult to clearly depict in cone-beam computed tomography images because the reconstruction filter conditions during image processing cause image blurring, resulting in decreased spatial resolution. We examined different reconstruction filters to assess their ability to improve spatial resolution and allow for a clearer visualization of the periodontal ligament space. MATERIALS AND METHODS Cone-beam computed tomography projections of 2 skull phantoms were reconstructed using 6 reconstruction conditions and then compared using the Thurstone paired comparison method. Physical evaluations, including the modulation transfer function and the Wiener spectrum, as well as an assessment of space visibility, were undertaken using experimental phantoms. RESULTS Image reconstruction using a modified Shepp-Logan filter resulted in better sensory, physical, and quantitative evaluations. The reconstruction conditions substantially improved the spatial resolution and visualization of the periodontal ligament space. The difference in sensitivity was obtained by altering the reconstruction filter. CONCLUSION Modifying the characteristics of a reconstruction filter can generate significant improvement in assessments of the periodontal ligament space. A high-frequency enhancement filter improves the visualization of thin structures and will be useful when accurate assessment of the periodontal ligament space is necessary.

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

Usability assessment of cone beam computed tomography with a full-fan mode bowtie filter compared to that with a half-fan mode bowtie filter

Background: In intensity modulated radiation therapy, cone beam computed tomography (CT) has been used to evaluate patients prior to treatment. This study conducted a comparative evaluation of the image reconstruction ability of the clinically used half-fan bowtie filter and the full-fan bowtie filter. Materals and Methods: A CT simulation marker was inserted inside a human phantom, and the pel...

متن کامل

Methods to evaluate the performance of kilovoltage cone-beam computed tomography in the three-dimensional reconstruction space

Background: Cone-beam computed tomography (CBCT) scanners for image-guided radiotherapy are in clinical use today, but there has been no consensus on uniform acceptance to verify the CBCT image quality yet. The present work proposed new methods to fully evaluate the performance of CBCT in its three-dimensional (3D) reconstruction space. Materials and Methods: Compared to the traditional methods...

متن کامل

Evaluation of Factors Affecting Absorbed Dose, Optimization Methods and Patient Dose Reduction in Dental Cone Beam CT (CBCT)

Introduction: Nowadays the use of cone beam computed tomography in dental imaging is increasing, although this method has a much lower dose than conventional CT scans, it delivers a higher dose than the panoramic and periapical patients therefore, , the aim of this study was to investigate the factors affecting the patients' dose in dental CBCTs and methods of optimizing and reducing the patien...

متن کامل

بررسی مقایسه‌ای دقت Cone beam CT، رادیوگرافی داخل دهانی و پروب پریودنتال در اندازه‌گیری ضایعات استخوانی پریودنتال

Background and Aims: Cone beam computed tomography (CBCT) produces high-quality data about diagnosis and periodontal treatment. To date, there is not enough research regarding periodontal bone measurement using CBCT. The aim of this study was to compare the accuracy of CBCT in measuring periodontal defects to that of intraoral radiography and probing methods.Materials and Methods: Two-hundred a...

متن کامل

Effect of Reconstruction Filter on Image in Dental Cone Beam Computed Tomography

1. Effect of reconstruction filter on image in dental cone beam computed tomography Yuuki Houno 2. Characteristics of image in dual-energy computed tomography(CT) imaging Dae Hong Kim 3. Verification of lateral biological dose distribution with microdosimetric kinetic model in carbon-ion radiotherapy Mikoto Tamura 4. The imparct of secondary particles on in-beam PET imaging for dose verificatio...

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:

دوره 47  شماره 

صفحات  -

تاریخ انتشار 2017