نتایج جستجو برای: gray scale ultrasonography

تعداد نتایج: 654976  

Journal: :Acta radiologica 2013
Özlem Tokgöz Hüsnü Tokgöz Ilker Ünal Nuray Voyvoda Ismail Şerifoğlu

BACKGROUND There has been no study evaluating the intrarenal hemodynamic changes after ureteroscopy in the published literature. PURPOSE To determine preoperative and postoperative intrarenal vascular parameters such as resistive index (RI), pulsatility index (PI), peak systolic velocity (PSV), end-diastolic velocity (EDV), measure changes on these values (ΔRI, ΔPI, ΔPSV, ΔEDV) after ureteros...

Journal: :Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 2003
I Y Järvelä P Sladkevicius A H Tekay S Campbell G Nargund

OBJECTIVE To assess intraobserver and interobserver variability in ovarian volume and gray-scale and color flow index measurements using transvaginal, three-dimensional, power Doppler ultrasonography. METHODS Eleven women (22 ovaries) were examined on day 8 of controlled ovarian hyperstimulation therapy, which was part of their in vitro fertilization treatment protocol. The patients were exam...

Journal: :Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 2006
E Epstein L Valentin

OBJECTIVE To determine if gray-scale ultrasound morphology in the presence or absence of intrauterine fluid and endometrial vascular morphology as assessed by color Doppler ultrasonography can discriminate between benign and malignant endometrium in women with postmenopausal bleeding. METHODS In a prospective study 95 consecutive women with postmenopausal bleeding and endometrial thickness > ...

Journal: :IOSR Journal of Computer Engineering 2012

Journal: :International Journal of Computational Intelligence Systems 2015

Journal: :Proceedings of the American Mathematical Society 1990

Journal: :Pattern Recognition 2000
Yibing Yang Hong Yan

This paper describes a modi"ed logical thresholding method for binarization of seriously degraded and very poor quality gray-scale document images. This method can deal with complex signal-dependent noise, variable background intensity caused by nonuniform illumination, shadow, smear or smudge and very low contrast. The output image has no obvious loss of useful information. Firstly, we analyse...

2000
Andreas E. Savakis

In this paper, a comparative study of lossless compression algorithms is presented. The following algorithms are considered: UNIX compress, gzip, LZW, CCITT Group 3 and Group 4, JBIG, old lossless JPEG, JPEG-LS based on LOCO, CALIC, FELICS, S+P Transform, and PNG. In cases where the algorithm under consideration may only be applied to binary data, the bitplanes of the gray scale image are separ...

Journal: :The Journal of The Institute of Image Information and Television Engineers 2007

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