Estimating crystal growth rates using computed tomography

نویسندگان

  • O D Jones
  • E T White
  • B K Butler
چکیده

It has been observed that sugar crystals growing in solution exhibit growth rate dispersion, that is, variation in growth rate from one crystal to the next. We consider the problem of estimating the distribution of growth rates in batch-grown crystals, given only samples of their sizes at a number of fixed points in time. The problem can be expressed as a tomographic image reconstruction problem, in which we try to reconstruct the joint density of initial size and growth from a set of marginal densities obtained by integrating the joint density in a number of different directions.

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

Estimating the Radiation-Induced Cancer Risks in Pediatric Computed Tomography

Introduction One of the central questions in radiological protection is the magnitude of the risks from low doses of radiation, related to the justification and optimization of the diagnostic medical exposures. Therefore, the aim of this study was to estimate the cancer incidence and mortality risks in children of different ages, sizes, and ethnicities undergoing computed tomography examination...

متن کامل

Crystal size distribution in metamorphic rocks: an example for the relationship between nucleation and growth rates with overstepping

Crystal size distribution (CSD) in metamorphic rocks provide fundamental information about crystal nucleation and growth rate, growth time and the degree of overstepping. CSD data for garnet, staurolite, kyanite and andalusite crystals from the aureole demonstrate that the earliest formed of these minerals, garnet, has the highest population density and the shortest growth time. The last formed...

متن کامل

Relationship between the dimensions of Sella Turcica with the vertical skeletal pattern of the face on cone beam computed tomography (CBCT) images in an Iranian population.

Background and Aim: Sella turcica is one of the most important orthodontic landmarks in a key point in lateral cephalometric analysis of the patients who need orthodontic treatment. The aim of this research was to investigate the relationship the dimensions of Sella Turcica with the vertical skeletal pattern of the face on cone beam computed tomography images in an Iranian population. Material ...

متن کامل

Laboratory Investigations on the Thermophysical Properties of the Ice-snow Interface While under a Controlled Temperature Gradient

Of critical importance to avalanche forecasting is the ability to draw meaningful conclusions from potentially only a small handful of field observations. With this in mind, our research focuses on the development of a new field metric for estimating the likelihood and rate at which new ice crystal growth and kinetic snow metamorphism may be occurring on or near a buried ice lens or crust that ...

متن کامل

Evaluation of models of spectral distortions in photon-counting detectors for computed tomography.

A semi-analytical model describing spectral distortions in photon-counting detectors (PCDs) for clinical computed tomography was evaluated using simulated data. The distortions were due to count rate-independent spectral response effects and count rate-dependent pulse-pileup effects and the model predicted both the mean count rates and the spectral shape. The model parameters were calculated us...

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   شماره 

صفحات  -

تاریخ انتشار 2000