BACKGROUND Ultrasound is as a noninvasive method commonly used in the work-up of thyroid nodules. This study aimed to evaluate the usefulness of sonographic and elastosonographic parameters in the discrimination of malignancy. PATIENTS AND METHODS 150 thyroid nodules were evaluated by gray-scale, Doppler and elastosonography. The cytological analysis revealed that 141 nodules were benign and ...

We present an algorithm to reconstruct gray scale images corrupted by noise. We use a Bayesian approach. The unknown original image is assumed to be a realization of a Markov random field on a finite two dimensional region Λ ⊂ Z2. This image is degraded by some noise, which is assumed to act independently in each site of Λ and to have the same distribution on all sites. For the estimator we use...

It has been just five years since gray-scale ultrasound (U/S) became clinically available. Yet the day-to-day importance of U/S in general medicine and surgerynot just the traditional areas of ob/gyn and echocardiography-would be hard to overestimate. Because U/S is so new, however, there are still many clinicians who are ill at ease with those funny fuzzy speckled images, so different from the...

background: sonoelastography is a new ultrasound method which could be helpful to determine which thyroid nodule is malignant. we designed this study to evaluate the accuracy of sonoelastography in differentiating of benign and malignant thyroid nodules in iranian patients. methods: forty thyroid nodules in forty consecutive patients who had been referred for sonography‑guided fine‑needle aspir...

OBJECTIVE To assess the value of MicroPure, a new ultrasound image processing technique, in identifying microcalcifications (formed by monosodium urate crystals) in the first metatarsophalangeal joints attacked by gout compared to gray-scale ultrasound images. MATERIALS AND METHODS Thirty-six patients who fulfilled the study inclusion criteria underwent gray-scale ultrasound and MicroPure exa...

Background: Jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. Regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility.Objective: An in vitro investigation of correlation between average gray scale in direct digital radiographs and Hounsfield units in CT-Scan pro...

In quantum gray-scale image processing, the storage in quantum states is the color information and the position information According to the advantage of small range of the gray scale in a gray-scale image, a novel storage expression of quantum gray-scale image is proposed and demonstrated in this study. Besides, a new concept of "quantum pointer" is put forward based on the expression. Quantum...

OBJECTIVE To evaluate the accuracy of Ultrasound in the diagnosis of Infantile Hypertrophic Pyloric stenosis, especially with simultaneous use of grey-scale & colour doppler examination of pylorus. METHODS Fifty two infants with suspected Infantile Hypertrophic Pyloric stenosis (IHPS) were evaluated with grey-scale and colour Doppler examination. The sonographic findings were categorized as p...